期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到3,203篇文章
< 1 2 … 161 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
Correction to"The first record of fossil Vitaceae wood from the Southern Hemisphere,a new combination for Vitaceoxylon ramunculiformis,and reappraisal of the fossil record of the grape family(Vitaceae)from the Cenozoic of Australia" 认领 引用
1
《Journal of Systematics and Evolution》 SCIE CSCD 2026年第4期832-832,共1页
Rozefelds AC,Pace MR.2018.The first record of fossil Vitaceae wood from the Southern Hemisphere,a new combination for Vitaceoxylon ramunculiformis,and reappraisal of the fossil record of the grape family(Vitaceae)from... Rozefelds AC,Pace MR.2018.The first record of fossil Vitaceae wood from the Southern Hemisphere,a new combination for Vitaceoxylon ramunculiformis,and reappraisal of the fossil record of the grape family(Vitaceae)from the Cenozoic of Australia.Journal of Systematics and Evolution 56:283-296.http://gffzzd3cc09b8251d45dfskbo0nu599uqq66b6.ffgz.tsg.suse.edu.cn/10.1111/jse.12300.In the published article,the description of the new species on page 285 did not include a validating illustration,as the registration numbers cited in the captions of Figs.2,3 on Pages 286 and 287 were incorrect. 展开更多
关键词 reappraisal vitaceoxylon ramunculiformisand description new species fossil vitaceae wood grape family southern hemisphere vitaceoxylon ramunculiformis reappraisal fossil record
Oldest Known Bony Fish Fossils Uncover Early Vertebrate Evolution 认领 引用
2
《Bulletin of the Chinese Academy of Sciences》 2026年第1期62-64,共3页
A research team led by Profs.ZHU Min, LU Jing, and ZHU You’an from the Institute of Vertebrate Paleontology and Paleoanthropology (IVPP) of the Chinese Academy of Sciences published two back-to-back cover stories in ... A research team led by Profs.ZHU Min, LU Jing, and ZHU You’an from the Institute of Vertebrate Paleontology and Paleoanthropology (IVPP) of the Chinese Academy of Sciences published two back-to-back cover stories in the journal Nature on March 4, reporting new discoveries about the origin of bony fishes. 展开更多
关键词 journal nature institute vertebrate paleontology paleoanthropology bony fishes chinese academy sciences oldest known bony fish fossils early vertebrate evolution vertebrate paleontology paleoanthropology research team
暂未订购 下载PDF
Integrating fossil and extant plant communities to calibrate paleoelevation of the Qinghai-Tibet Plateau 认领 引用 被引量：1
3
作者 Yang-Jun Lai Jian-Fei Ye +4 位作者 Bing Liu Yun Liu An-Min Lu Fu-Wen Wei Zhi-Duan Chen 《Journal of Systematics and Evolution》 SCIE CSCD 2025年第1期25-38,共14页
The formation of the Qinghai-Tibet Plateau has long been debated,despite the various proxies used to estimate its paleoelevation.Here,we introduce a novel method to calibrate paleoelevation by comparing the fossil and... The formation of the Qinghai-Tibet Plateau has long been debated,despite the various proxies used to estimate its paleoelevation.Here,we introduce a novel method to calibrate paleoelevation by comparing the fossil and extant plant communities in the Qinghai-Tibet Plateau.Our estimation confirms that the uplift of the plateau was an episodic and heterochronous process.Specifically,the Lhasa Terrane was already elevated by 1 km before the initial India-Asia collision.During the first orogenic stage,the Qiangtang Terrane rose faster than the Lhasa Terrane,attaining 3 km in the late Eocene.In the second stage,the Lhasa Terrane underwent rapid uplift,reaching 3 km in the Oligocene.By the Middle Miocene,both the Qiangtang and Lhasa terranes had achieved an elevation of 4 km.The Himalaya rose by at least 2 km after the Pliocene.Our biological knowledge-based findings contradict the previous geological evidence-based reports,which posited that the plateau had reached an elevation of 4-5 km during the Eocene.We provide a new perspective on the plateau′s uplift history based on biological evidence,which has the potential to reconcile the confusion arising from contradictory proxies. 展开更多
关键词 cluster analysis community similarity fossil assemblages Himalaya paleoelevation Tibetan Plateau
Preservation potential of Cambrian small shelly fossils in different microfacies, North China 认领 引用 被引量：1
4
作者 Yazhou Hu Timothy P。Topper +7 位作者 Luke C。Strotz Yue Liang Fan Liu Rao Fu Baopeng Song Zhao Wang Bing Pan Zhifei Zhang 《Geoscience Frontiers》 SCIE CAS CSCD 2025年第5期139-165,共27页
Small shelly fossils(SSFs)have long been recognized as important to the studies of both metazoan evolution and the onset of biomineralization during the Cambrian radiation.The marked decline in the occurrence,diversit... Small shelly fossils(SSFs)have long been recognized as important to the studies of both metazoan evolution and the onset of biomineralization during the Cambrian radiation.The marked decline in the occurrence,diversity and abundance of SSFs in the middle to late Cambrian,when compared with the early Cambrian,has often been regarded as a result of the closure of a phosphatization window.Despite this,there have been numerous and consistent reports of SSFs from the middle Cambrian and younger deposits.To identify possible factors influencing SSF preservation,five microfacies including bioclastic limestone,flat-pebble conglomerates with bioclasts,hummocky cross-stratified grainstone with bioclasts,bioclastic grainstone in hardgrounds and glauconite bioclastic wackstone-packstone,from Cambrian Series 2 to Miaolingian in North China are compared to assess how differences in lithology impact the preservation potential of SSFs.Our results,based on 35,161 SSF specimens from deposits across six sections,suggest that there are still abundant and diverse SSFs in the middle Cambrian of North China preserved in ways not exclusively reliant on the presence of phosphate and that SSF preservation can be linked to the differences in microfacies in the early to middle Cambrian of North China. 展开更多
关键词 Small shelly fossils Shell structure Glauconite Phosphatization window
The first discovery of non-avian dinosaur egg and bone fossils in the Hefei Basin 认领 引用 被引量：1
5
作者 WANG Qiang DONG Zhe +4 位作者 MAO Lei ZHU Xu-Feng CHEN Yan-Bin HUANG Jian-Dong DING Hai-Dong 《古脊椎动物学报（中英文）》 CAS CSCD 北大核心 2025年第3期248-252,共5页
This report is about the first record of non-avian dinosaur eggs in the Hefei Basin,Anhui Province,China.Based on the combination of elongated egg body,linear ridges on the outer surface and two structure layer,the eg... This report is about the first record of non-avian dinosaur eggs in the Hefei Basin,Anhui Province,China.Based on the combination of elongated egg body,linear ridges on the outer surface and two structure layer,the eggs can be referred to Elongatoolithidae.The gradual boundary between the cone and the column layers as well as the relative thin eggshell(less than 1 mm)indicates its affinity within Elongatoolithus.The eggs are identified as Elongatoolithus oosp.,as they were severely compressed and experienced erosion on both inner and outer surfaces.The discovery of egg fossil in the Hefei Basin offers evidence for stratum comparison in this region and supplements the diversity of egg fossils in Anhui.Meanwhile,this discovery also enriches the paleogeographic distribution of elongatoolithids. 展开更多
关键词 Hefei Basin Upper Cretaceous Zhangqiao Formation egg fossil Elongatoolithidae
暂未订购 下载PDF
Top-down Constraint on Regional Fossil Fuel CO2Emissions in China Using GOSAT and OCO-2 Satellite XCO2Retrievals:A Case of the COVID-19 Lockdown 认领 引用 被引量：1
6
作者 Wenyuan CHANG Dongxu YANG +1 位作者 Xiao TANG Lei KONG 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2025年第8期1566-1579,共14页
The challenge of establishing top-down constraints for regional emissions of fossil fuel CO2(FFCO2)arises from the difficulty in distinguishing between atmospheric CO2concentrations released from fossil fuels... The challenge of establishing top-down constraints for regional emissions of fossil fuel CO2(FFCO2)arises from the difficulty in distinguishing between atmospheric CO2concentrations released from fossil fuels and background variability,particularly owing to the influence of terrestrial biospheric fluxes.This necessitates the development of a regional inversion methodology based on atmospheric CO2observations to verify bottom-up estimations independently.This study presents a promising approach for estimating China's FFCO2emissions by incorporating the model residual errors(MREs)of the column-averaged dry-air mole fractions of CO2(XCO2)from FFCO2emissions(MREff)retained in the analysis of natural flux optimization.China's FFCO2emissions during the COVID-19 lockdown in 2020 are estimated using the GEOS-Chem adjoint model.The relationship between the MREff and FFCO2is determined using the model based on a regional FFCO2anomaly suggested by posterior NOx emissions from air-quality data assimilation.The MREff is typically one-tenth in magnitude,but some positively skewed outliers exceed 1 ppm because the prior emissions lack lockdown impacts,thereby exerting considerable observation forcing given the satellite retrieval uncertainties.We initialize the FFCO2with posterior NOx emissions and optimize the colinear emission ratio.Synthetic data experiments demonstrate that this approach reduces the FFCO2bias to less than 10%.The real-data experiments estimate 19%lower FFCO2with GOSAT XCO2and 26%lower with OCO-2 XCO2than the bottom-up estimations.This study proves the feasibility of our regional FFCO2inversion,highlighting the importance of addressing the outlier behaviors observed in satellite XCO2retrievals. 展开更多
关键词 XCO2 fossil fuel emissions adjoint model GEOS-Chem COVID-19
暂未订购 下载PDF
Classification and Age Estimation of Fossil Shells from Ban Sap Noi Geopark in Thailand,through the Material Characterization Techniques 认领 引用
7
作者 Sirikorn Pongtornkulpanich Patcharin Naemchanthara +3 位作者 Kridsada Faksawat Weeranut Kaewwiset Pichet Limsuwan Kittisakchai Naemchanthara 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS CSCD 2025年第3期635-643,共9页
The fossil shells on the sedimentary rocks were collected from The Historical Park,Ban Sap Noi Geopark,Phetchabun Province,Thailand.However,the fossils remained in this area were investigated on the characteristic spe... The fossil shells on the sedimentary rocks were collected from The Historical Park,Ban Sap Noi Geopark,Phetchabun Province,Thailand.However,the fossils remained in this area were investigated on the characteristic species only in geological studies with taxonomy for fossil age predicting.To fill up the gap of these studies,the material characterization techniques were used to study the chemical composition and structure of fossil shells I,II and III.The results clearly showed that the morphologies of all fossil shells were Brachiopod fossils with different species.The functional group and elemental composition of all fossil shells showed that the high content of calcium carbonate was a major composition.In addition,the high content of quartz indicated the silica precipitation phenomenon in all fossil shells.The element composition of cross-sectional morphology and energy dispersive spectroscope (EDS mapping) were used to confirm the presence of Si element in each zone of fossil shells.The crystal structures of all fossil shells were investigated and indicated that the calcium carbonate compound was a calcite phase and silicon dioxide compound was a quartz phase.Moreover,the crystal structure of quartz phase was used to calculate the crystallinity index.The crystallinity index values in all fossil shells indicated a well-crystallized quartz.The age of fossil shells was estimated and found to be brachiopod fossil in carboniferous period with the age of about 359.2 to 299.0 million years. 展开更多
关键词 fossil shell Ban Sap Noi Geopark crystallinity index fossil age carboniferous period
暂未订购 下载PDF
Early Miocene micromammal fossils from Gucheng in Linxia,Gansu,China 认领 引用
8
作者 WANG Ban-Yue QIU Zhu-Ding LI Lu 《古脊椎动物学报（中英文）》 CAS CSCD 北大核心 2025年第2期102-132,共31页
The micromammal fossils collected from the Shangzhuang Formation of the Linxia Basin,Gansu,are described here.The assemblage consists of 16 species of 13 genera belonging to 7 families,including one new species and on... The micromammal fossils collected from the Shangzhuang Formation of the Linxia Basin,Gansu,are described here.The assemblage consists of 16 species of 13 genera belonging to 7 families,including one new species and one taxon previously unknown from China.Among them 5 genera are Oligocene holdovers and 11 genera/species are known to make their first appearances in Early Miocene,indicating an Early Miocene age for the Gucheng Fauna.The absence of Oligocene survivors such as Tataromys,Yindirtemys,Eucricetodon and Tachyoryctoides,which usually occur in the Xiejian age of Early Miocene,and the presence of newcomers Protalactaga,Megacricetodon and Gobicricetodon,that made their first appearance only in the Shanwangian age of late Early Miocene,suggest that the Gucheng Fauna is of a later age of Early Miocene.The new species,Sinolagomys guchengensis,showing more derived morphology than in S.ulunguensis,seems to support an assessment of the fauna in Shanwangian age.Thus,the Gucheng Fauna may belong to late Early Miocene Shanwangian,partially equivalent to MN 3/4 of the European land mammal zonation.Ecological analysis of the fauna indicates that the palaeoecological condition of the Gucheng area might still be a predominantly arid shrub-steppe in late Early Miocene. 展开更多
关键词 Gucheng Linxia Gansu late Early Miocene Shangzhuang Formation micromammal fossils
暂未订购 下载PDF
Heterogeneous occurrence of evergreen broad-leaved forests in East Asia:Evidence from plant fossils 认领 引用 被引量：4
9
作者 Jiagang Zhao Shufeng Li +8 位作者 Jian Huang Wenna Ding Mengxiao Wu Tao Su Alexander Farnsworth Paul J.Valdes Linlin Chen Yaowu Xing Zhekun Zhou 《Plant Diversity》 SCIE CAS CSCD 2025年第1期1-12,共12页
Evergreen broad-leaved forests(EBLFs) are widely distributed in East Asia and play a vital role in ecosystem stability. The occurrence of these forests in East Asia has been a subject of debate across various discipli... Evergreen broad-leaved forests(EBLFs) are widely distributed in East Asia and play a vital role in ecosystem stability. The occurrence of these forests in East Asia has been a subject of debate across various disciplines. In this study, we explored the occurrence of East Asian EBLFs from a paleobotanical perspective. By collecting plant fossils from four regions in East Asia, we have established the evolutionary history of EBLFs. Through floral similarity analysis and paleoclimatic reconstruction, we have revealed a diverse spatio-temporal pattern for the occurrence of EBLFs in East Asia. The earliest occurrence of EBLFs in southern China can be traced back to the middle Eocene, followed by southwestern China during the late Eocene-early Oligocene. Subsequently, EBLFs emerged in Japan during the early Oligocene and eventually appeared in central-eastern China around the Miocene. Paleoclimate simulation results suggest that the precipitation of wettest quarter(PWet Q, mm) exceeding 600 mm is crucial for the occurrence of EBLFs. Furthermore, the heterogeneous occurrence of EBLFs in East Asia is closely associated with the evolution of the Asian Monsoon. This study provides new insights into the occurrence of EBLFs in East Asia. 展开更多
关键词 Evergreen broad-leaved forests(EBLFs) Plant fossils East Asia Paleoclimate Paleovegetation Asian monsoon
暂未订购 下载PDF
Revised phylogenomic analysis and Cretaceous fossil evidence reveal new insights into evolution of Scirtinae(Coleoptera:Scirtidae) 认领 引用
10
作者 Yan-Da Li Rafat Ruta +1 位作者 Di-Ying Huang Chen-Yang Cai 《Journal of Systematics and Evolution》 SCIE CSCD 2025年第5期1166-1178,共13页
Recent phylogenomic studies have confirmed that Scirtidae is one of the earliest-diverging groups of polyphagan beetles.Cretaceous fossils and genome-scale data have shown promise in elucidating the evolutionary histo... Recent phylogenomic studies have confirmed that Scirtidae is one of the earliest-diverging groups of polyphagan beetles.Cretaceous fossils and genome-scale data have shown promise in elucidating the evolutionary history of Scirtidae.However,knowledge about the Mesozoic diversity of scirtids remains limited,and a recent phylogenomic study of Australasian Scirtinae failed to consider among-site compositional heterogeneity.In this study,we present a refined phylogeny of Scirtinae by analyzing ultraconserved element data under the better-fitting site-heterogeneous CAT-GTR+G4 model.A new scirtine fossil,Serracyphon philipsi gen.et sp.nov.,is reported from mid-Cretaceous Kachin amber.This fossil is characterized by serrate antennae,uncarinated antennomere 1,absence of subocular carinae,and absence of a buttonhole on subgenal ridges.The placement of Serracyphon is evaluated within our updated phylogenomic framework for scirtine evolution.Additionally,we critically reevaluate the taxonomy of the"Scirtes"fossils previously described from the Eocene of the Isle of Wight. 展开更多
关键词 fossil Kachin amber phylogenomics Scirtinae
Calcareous Nannofossils and Molecular Fossils in Cobalt-rich Crusts and their Response to the P/E Global Event 认领 引用 被引量：6
11
作者 ZHANG Haisheng ZHAO Jun +3 位作者 HAN Zhengbing LU Bing WU Guanghai PULYAEVA I.A. 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2013年第5期1264-1274,共11页
A biostratigraphic study on calcareous nannofossils from the CM3D06 Co-rich ferromanganese crust from the Magellan seamounts in the northwestern Pacific enabled estimation of depositional age.The bio-imprinting of cal... A biostratigraphic study on calcareous nannofossils from the CM3D06 Co-rich ferromanganese crust from the Magellan seamounts in the northwestern Pacific enabled estimation of depositional age.The bio-imprinting of calcareous nannofossils and other fossil species suggests six age ranges for the nannofossils:late Cretaceous,late Paleocene,(early,middle,late)Eocene,middle Miocene,late Pliocene,and Pleistocene.Gas chromatography(GC)and gas chromatography-mass spectrometry(GC-MS)were used to test the Co-rich crusts,and a variety of molecular fossils were detected,such as chloroform bituminous"A",n-alkane,isoprenoid and sterol.Peak carbon and molecular indices(such as C23-/C24+,CPI,Pr/Ph,PrC17,PhCxs and j13C)indicate that the parent organic matter is dominated by marine phytoplankton and thallogen whereas there is little input of terrestrial organic matter.Researches on calcareous nannofossils,molecular fossils and molecular organic geochemistry data reveal that the Paleocene/Eocene(P/E)global event is recorded in the cobalt-rich crusts from the northwestern Pacific Ocean.A succession of biomes can be observed near the 85 mm boundary(about 55 Ma),i.e.,the disappearance of the late Cretaceous Watznaueria barnesae and Zigodicus spiralis,and Broisonia parka microbiotas above the P/E boundary,and the bloom of Coccolithus formosus,Discoaster multiradiatus,Discoaster mohleri and Discoaster sp.below the boundary.Typical parameters of molecular fossils,such as saturated hydrocarbon components and carbon-number maxima,Pr/Ph,Pr/C17,Ph/C18,distribution types of sterols,Ts/Tm ratios and bacterial hopane,also exhibit dramatic changes near the P/E boundary.These integrated results illustrate that the biome succession of calcareous nannofossils,relative content of molecular fossils and molecular indices in the cobalt-rich crusts near the 85 mm boundary faithfully record the P/E global event. 展开更多
关键词 Late Cretaceous cobalt-rich crust calcareous nannofossils molecular fossils Paleocene-Eocene boundary PETM
暂未订购 下载PDF
Direct transformation of fossil carbon into chemicals: A review 认领 引用 被引量：3
12
作者 Jingyuan Fan Kang Gao +3 位作者 Peng Zhang Yuying Dang Yuxiao Ding Bingsen Zhang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第2期247-268,I0007,共22页
Despite the long tradition of fossil carbon(coal,char,and related carbon-based materials)for fueling mankind,the science of transforming them into chemicals is still demandingly progressing in the current energy scena... Despite the long tradition of fossil carbon(coal,char,and related carbon-based materials)for fueling mankind,the science of transforming them into chemicals is still demandingly progressing in the current energy scenario,especially when considering its responsibilities to the global climate change.Traditionally,there are four routes of preparing chemicals directly from fossil carbon,including hydrogasification,gasification,direct liquefaction,and oxidation,in the macroscope of gas-solid reaction(hydrogasification and gasification)and liquid-solid reaction(direct liquefaction and oxidation).When the study goes to microscale,the gas-solid reaction can be considered as the reaction between the severe condensed radicals and gas,while the liquid-solid reaction is the direct reaction between the radical and the activated-molecule.To have a full overview of the area,this review systematically summarizes the main factors in these processes and shows our own perspectives as follows,(ⅰ)stabilizing the free radicals generated from coal and then directly converting them has the highest efficiency in coal utilization;(ⅱ)the research on the self-catalytic process of coal structure will have a profound impact on the direct preparation of chemicals from fossil carbon.Further discussions are also proposed to guide the future study of the area into a more sustainable direction. 展开更多
关键词 Fossil carbon Coal-based carbon materials Direct fossil carbon conversion processes Hydrogasification Gasification Direct liquefaction Oxidation
暂未订购 下载PDF
Jurassic fossil discovery in China reveals new clues about bird origins 认领 引用
13
作者 程懋懋 《疯狂英语（初中天地）》 2025年第4期42-43,共2页
Pre-reading What do you know about the Jurassic Period?Can you name any animals that lived during that time?Chinese scientists have found the oldest short-tailed bird fossil in Fujian Province,eastern China.This fossi... Pre-reading What do you know about the Jurassic Period?Can you name any animals that lived during that time?Chinese scientists have found the oldest short-tailed bird fossil in Fujian Province,eastern China.This fossil is about 150 million years old,suggesting that birds might have originated earlier than scientists previously thought. 展开更多
关键词 Jurassic jurassic periodcan origins Fujianprovince bird fossil China
暂未订购 下载PDF
Fossil Crania from Central China Revise Family Tree of Human Beings 认领 引用
14
作者 SONG Jianlan 《Bulletin of the Chinese Academy of Sciences》 2025年第3期153-156,共4页
With a mixed look of both Homo erectus and Homo sapiens,Yunxian Man,who could have connected different ancestors of ours,helps unveil a stage of fast diversification in human evolution.
关键词 family tree homo sapiens homo erectus homo sapiensyunxian fossil crania mixed look central china human beings
暂未订购 下载PDF
Projecting the global impact of fossil fuel production from the Former Soviet Union 认领 引用 被引量：1
15
作者 Steve Mohr Jianliang Wang +1 位作者 James Ward Damien Giurco 《International Journal of Coal Science & Technology》 EI CAS CSCD 2021年第6期1208-1226,共19页
Detailed projections of the Former Soviet Union(FSU)fossil fuel production has been created.Russian production has been modelled at the region(oblast)level where possible.The projections were made using the Geologic R... Detailed projections of the Former Soviet Union(FSU)fossil fuel production has been created.Russian production has been modelled at the region(oblast)level where possible.The projections were made using the Geologic Resource Supply-Demand Model(GeRS-DeMo).Low,Best Guess and High scenarios were created.FSU fossil fuels are projected to peak between 2027 and 2087 with the range due to spread of Ultimately Recoverable Resources(URR)values used.The Best Guess(BG)scenario anticipates FSU will peak in 2087 with production over 170 EJ per year.The FSU projections were combined with rest of the world projections(Mohr et al.2015b),the emissions from the High scenario for the world are similar to the IPCC A1 AIM scenario. 展开更多
关键词 Former Soviet Union Fossil Fuel Production Fossil Fuel Projection
暂未订购 下载PDF
INAUGURAL MEETING OF THE NATIONAL FOSSIL ALGAE RESEARCH GROUP OF PSC AND THE 1ST FOSSIL ALGAE SYMPOSIUM HELD IN NANJING 认领 引用
16
《古生物学报》 CAS 1982年第3期381-381,共1页
The inaugural meeting of the National Fossil Algae Research Group of PSC and the l st fossil algae symposium were held from December 2-7,1981 in Nanjing.117 Chinese fossil algae of China",in which he gave an geol... The inaugural meeting of the National Fossil Algae Research Group of PSC and the l st fossil algae symposium were held from December 2-7,1981 in Nanjing.117 Chinese fossil algae of China",in which he gave an geological colleges,geological survey,petroleum prospecting units,coal and metallurgical industry enterprises took part in the meeting,which marks a new stage in Chinese fossil algae researeh. 展开更多
关键词 PSC fossil algae geological colleges l st fossil algae symposium inaugural meeting fossil algae symposium geological survey national fossil algae research group
暂未订购 下载PDF
Quantitative Analysis of Paleoatmospheric CO2 Level Based on Stomatal Characters of Fossil Ginkgo from Jurassic to Cretaceous in China 认领 引用 被引量：28
17
作者 SUN Bainian XIAO Liang +4 位作者 XIE Sanping DENG Shenghui WANG Yongdong JIA Hui Susan Tumer 《Acta Geologica Sinica(English Edition)》 SCIE CAS 2007年第6期931-939,共9页
A better theoretical and practical understanding of the linkage between paleo-CO2 and climate during geological history is important to enhance the sustainable development of modern human society. Development in plant... A better theoretical and practical understanding of the linkage between paleo-CO2 and climate during geological history is important to enhance the sustainable development of modern human society. Development in plant physiology since the 1980s has led to the realization that fossil plants can serve as a proxy for paleoatmosphere and paleobiosphere. As a relict gymnosperm with evolutionary stasis, Ginkgo is well suited for paleoenvironmental reconstruction. This paper analyzes fossil Ginkgo species from integrated strata in the north of China using anatomic data of plant physiology. Using stomatal parameters, a trend for the paleo-CO2 level during the Early-Middle Jurassic and the Early Cretaceous was obtained, which is consistent with the estimates by GEOCARB. The trend is also similar to that of Mean Global Surface Temperature in geological time. Compared with three other atmospheric CO2 concentration parameters, the trend of paleo-CO2 level based on the stomatal parameter of the fossil Ginkgo specimens from three contiguous strata is more exact. 展开更多
关键词 Jurassic Cretaceous fossil Ginkgo stomatal parameter paleoatmospheric CO2
暂未订购 下载PDF
Red Palaeosols Development in Response to the Enhanced East Asia Summer Monsoon since the Mid-Pleistocene in South China: Evidence Derived from Magnetic Properties and Molecular Fossil Records 认领 引用 被引量：5
18
作者 顾延生 黄咸雨 +2 位作者 张卫国 洪汉烈 李永涛 《Journal of Earth Science》 SCIE EI CAS CSCD 2013年第3期382-396,共15页
Although Pleistocene red paleosols are widely distributed in South China, paleoenviron-mental interpretation has proved difficult because of intense weathering. Here we combine data from molecular fossil and magnetic ... Although Pleistocene red paleosols are widely distributed in South China, paleoenviron-mental interpretation has proved difficult because of intense weathering. Here we combine data from molecular fossil and magnetic properties to reconstruct a record of changes in pedogenic intensity for red paleosols in Southeast China. Depth distribution pattern of magnetic properties indicates that lower （higher） χ but higher （lower） values of HIRM （hard isothermal remanent magnetization） and SIRM （saturation isothermal remanent magnetization）/χ has tight relationship with the intensity of pedogenesis,especially the occurrence of well-developed net-like veins, which is absolutely responsible for the presence of anti-ferromagnetic minerals at the cost of fine-grained SP （superparamagnetic）/SD （single domain） ferrimagnetic minerals. The carbon distribution pattern of n-alkanes, n-alkanols, and n-alkanoic acids reflects the predominant contributions of microorganisms to the organic matter during pedogenesis, which provide direct evidence for strong microbial activities in response to theextremely hot-humid condition while white coarse net-like veins occurrence. Our results demonstrate that the presence of the enhanced East Asia summer monsoon has played a key role in the oxide-dominated weathering regime, and pedogenesis, and microbial activities. Changes in molecular ratios and magnetic properties are used to show that red paleosols have undergone three stages of soil formation in striking response to the evolution of the East Asia summer monsoon： （1） the most effective since the Middle Pleistocene; （2） moderately effective since 270 ka or so; （3） least effective since the last glacial. Our research provides important evidence to understand how red paleosols espond to global change since the Middle Pleistocene. 展开更多
关键词 red paleosols magnetic property molecular fossil pedogenic intensity East Asia sum- mer monsoon South China.
暂未订购 下载PDF
Protoconodont fossils for refining the Cambrian bottom and the contribution to shale gas formation along the southwest margin of Yangtze Block 认领 引用 被引量：19
19
作者 Jun-ping Liu Si-cun Song +8 位作者 Wei Wang Feng Tang Jing Li Xiang-dong Duan Xiao-hu Wang Bai-dong Sun Sai-ying Yu Shao-bin Hu Wen-ting Duan 《China Geology》 CAS 2020年第4期558-566,共9页
It has been an intense debate on the exact boundary between Ediacaran and Cambrian in the southwest Yangtze Block.The calibration of this critical boundary has a remarkable influence on the further investigation of th... It has been an intense debate on the exact boundary between Ediacaran and Cambrian in the southwest Yangtze Block.The calibration of this critical boundary has a remarkable influence on the further investigation of the break-up of the Rodinia Supercontinent,the early life evolution,and the mechanism of the phosphorite deposit.Ediacaran and Cambrian strata and fossils are widely distributed in Anning,Yunnan Province in China.In recent years,the Xiaowaitoushan Member from the Lower Yuhucun Formation has been studied.Through this interval with continuous collections,the first appearance datums(FADs)of the protoconodont(Fomitchella cf.inchoate Yang et He,Protohertzina cf.anabarica Missarzhevsky)and globular embryos fossil(Olivooides sp.)earlier than these in the Lower Cambrian strata of the Meishucun Formation were discovered.This discovery indicates that the Xiaowaitoushan Member has included more FADs than the previously discovered single FAD of Anabarites primitivus Qian et Jiang,and the Ediacaran–Cambrian boundary in southwest China should be replaced below the Point“A”of the Meishucun Formation in Yunnan Province.The Point“B”of the Meishucun Formation is younger than the suggested age 541 Ma of the Ediacaran–Cambrian boundary and can no longer reference the Global Boundary Stratotype Section and Point(GSSP)correlation in southwest China.It can be suggested based on the previous stratigraphy and palaeontology studies from northern Sichuan and southern Shaanxi and the FAD of the globular embryos fossils that the Ediacaran‒Cambrian boundary in the southwest Yangtze Block should be placed at the base of the Xiaowaitoushan Member;other phosphorite strata refer to Xiaowaitoushan Member.The discovery of the FADs of the shelly fossils in the Xiaowaitoushan Member provides new evidence for the global correlation of the Ediacaran–Cambrian boundary in the southwest Yangtze Block.The conodont discoloration index(CAI)of the specimens in Anning is between 2 and 3,which indicates that the organic matter in Xiaowaitoushan Member is matured and has high potential to form a shale gas reservoir. 展开更多
关键词 Shale gas Ediacaran-Cambrian boundary Protoconodont Embryos fossil Xiaowaitoushan Member Southwest Yangtze Block Geological survey engineering Yunnan Province China
暂未订购 下载PDF
Energy revolution:From a fossil energy era to a new energy era 认领 引用 被引量：29
20
作者 Zou Caineng Zhao Qun +1 位作者 Zhang Guosheng Xiong Bo 《Natural Gas Industry B》 2016年第1期1-11,共11页
This paper aims to predict the future situation of global energy development.In view of this,we reviewed the history of energy use and understood that new energy sources will usher in a new era following oil&gas,c... This paper aims to predict the future situation of global energy development.In view of this,we reviewed the history of energy use and understood that new energy sources will usher in a new era following oil&gas,coal and wood one after another in the past time.Although the fossil energy sources are still plenty in the world,great breakthroughs made in some key technologies and the increasing demand for ecological environmental protection both impel the third time of transformation from oil&gas to new energy sources.Sooner or later,oil,gas,coal and new energy sources will each account for a quarter of global energy consumption in the new era,specifically speaking,ac-counting for 32.6%,23.7%,30.0%and 13.7%respectively.As one of the largest coal consumer,China will inevitably face up to the situation of tripartite confrontation of the coal,oil&gas and new energy.The following forecasting results were achieved.First,the oil will be in a stable period and its annual production peak will be around 2040,reaching up to 45×108t.Second,the natural gas will enter the heyday period and its annual production peak will be around 2060,reaching up to 4.5×1012m3,which will play a pivotal role in the future energy sustainable development.Third,the coal has entered a high-to-low-carbon transition period,and its direct use and the discharged pollutants will be significantly reduced.In 2050,the coal will be dropped to 25%of the primary energy mix.Last,the development and utilization of new energy sources has been getting into the golden age and its proportion in the primary energy mix will be substantially enhanced.On this basis,we presented some proposals for the future energy development in China.At first,we should understand well that China's energy production and consumption has its own characteristics.Under the present situation,we should strengthen the clean and efficient use of coal resources,which is the key to solving our energy and environmental issues.Then,under the low oil price circumstance,we should keep 200 million tons of annual oil production as“the bottom line”so as to ensure national energy security and to accelerate tight gas,shale gas and other unconventional resources development.In 2030,the annual natural gas production will reach up to more than 300 Bcm.Finally,the development and utilization of new energy resources should be further strengthened and non-fossil energy sources will be expected to reach as high as 20%of the primary energy consumption by 2030. 展开更多
关键词 Energy revolution Fossil energy New energy Oil&gas Coal Renewable energy Unconventional oil&gas Shale gas Tight oil Nanotechnology Graphene Internet plus
暂未订购 下载PDF
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 2 … 161 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈