检索结果-南通市图书馆

Acta Geologica Sinica(English Edition) 2024年第2期98卷 416-429页

作者： YANG Zhen FU Yong LI Chao CAI Xi GUO Chuan College of Eco-environmental Engineering Guizhou Minzu UniversityGuiyang 550025China College of Resources and environmental Engineering Guizhou UniversityGuiyang 550025China Key Laboratory of Karst Georesources and the environment Ministry of EducationGuizhou UniversityGuiyang 500025China National Research Center for Geoanalysis Chinese Academy of Geological SciencesBeijing 100037China

A polymetallic layer is usually developed at the bottom of the early Cambrian black shale in Guizhou *** mineral that makes up the polymetallic layer is related to the sedimentary *** analyze the differentiation mechanism between polymetallic deposits(Ni-Mo and V),the Zhijin Gezhongwu profile located in the outer shelf and the Sansui Haishan V deposit located in the lower slope are selected to study the in situ sulfur isotopes and trace elements of *** results show that δ^(34)S values of pyrite vary widely from−7.8‰to 28‰in the Gezhongwu profile,while the δ^(34)S values are relatively uniform(from 27.8‰to 38.4‰)in the Haishan *** isotopic S composition is consistent with the transition that occurs in the sedimentary phase from the shelf to the deep sea on the transgressive Yangtze platform;this indicates that the δ^(34)SO_(4)^(2−)values in seawater must be differently distributed in depositional *** sulfur in the Ni-Mo layer is produced after the mixing of seawater and hydrothermal fluid,while the V layer mainly originates from ***,the Ni-Mo and V deposits have been differentiated primarily on the basis of the combined effect of continental weathering and hydrothermal fluid.

关键词： sedimentary environment black shale polymetallic layer pyrite early Cambrian

Shale Lithofacies and sedimentary environment of the Third Member,Shahejie Formation,Zhanhua Sag,Eastern China

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2022年第3期96卷 1024-1040页

作者： ZHU Xiaomin ZHANG Meizhou ZHU Shifa DONG Yanlei LI Chao BI Yuequan MA Lichi State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing 102249China Shengli Oilfield Company SinopecDongyingShandong 257000China

Researches into shale lithofacies,their sedimentary environments and relationship benefit understanding both of sedimentary cycle division and unconventional hydrocarbon exploration in lacustrine *** on a 100~300-m-thick dark shale,mudstone and limestone encountered in the lower third member of the Eocene Shahejie Formation(Es3l member)in Zhanhua Sag,Bohai Bay Basin,eastern China,routine core analysis,thin sectioning,scanning electron microscopy(SEM),mineralogical and geochemical measurements were used to understand detailed facies characterization and paleoclimate in the *** Es3l shale sediment includes three sedimentary cycles(C3,C2 and C1),from bottom to top,with complex sedimentary characters and spatial *** terms of the composition,texture,bedding and thickness,six lithofacies are recognized in this *** geochemical parameters,such as trace elements(Sr/Ba,Na/Al,V/Ni,V/(V+Ni),U/Th),carbon and oxygen isotopes(δ^(18)O,δ^(13)C),and total organic carbon content(TOC)indicate that the shales were deposited in a deep to semi-deep lake,with the water column being salty,stratified,enclosed and *** cycles C3 and C2 of the middle-lower sections,the climate was arid,and the water was salty and *** and laminar mudstone-limestone was deposited with moderate organic matter(average TOC 1.8%)and good reservoir quality(average porosity 6.5%),which can be regarded as favorable *** the C1 cycle,a large amount of organic matter was input from outside the basin and this led to high productivity with a more humid *** calcareous mudstone was deposited,and this is characterized by high TOC(average 3.6%)and moderate porosity(average 4%),and provides favorable source rocks.

关键词： unconventional energy resources shale lithofacies sedimentary environment Shahejie Formation Zhanhua Sag Bohai Bay basin

Comparison of the Macrozoobenthic Community and sedimentary environment with and Without Horseshoe Crab Presence in the Crocodile Island Intertidal Zone,Xiamen,China

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2022年第3期21卷 573-582页

作者： CAI Lizhe ZHAO Xiaoyu PENG Wenqing LIN Jingxiang YANG Deyuan RAO Yiyong FU Sujing CHEN Xinwei CAO Wenzhi College of the environment and Ecology Xiamen UniversityXiamen361102China Department of environmental Science and Engineering Xiamen University Tan Kah Kee CollegeZhangzhou363105China Institute of Marine Biology Taiwan Ocean UniversityKeelung20224China South China Sea Fisheries Research Institute Chinese Academy of Fishery SciencesGuangzhou510300China Laboratory of Marine Biology and Ecology Third Institute of OceanographyMinistry of Natural ResourcesXiamen361005China

In order to compare the macrozoobenthic community and sedimentary environment with and without the presence of horseshoe crabs,the benthic macrofauna,sediment grain size,chromium(Cr),cobalt(Co),nickel(Ni),polycyclic aromatic hydrocarbon(PAHs),organic carbon and nitrogen were seasonally investigated at site A(with horseshoe crab presence),sites B and C(without horseshoe crab presence)in the Crocodile Island intertidal zone in Xiamen from June 2018 to July *** results showed that most of the community parameters of benthic macrofauna,population parameters of common benthic macrofauna and environmental parameters were significantly different at the sites with horseshoe crab versus non-horseshoe crab sites.A two-way ANOVA test showed that the densities of Ceratonereis erythraeensis and Sigambra hanaokai had significant site *** and nonmetric multi-dimensional scaling(NMDS)analysis showed the community composition of benthic macrofauna was significantly different among the three sampling sites over four *** mean sand content at site A(64.32%)was higher than those at site B(36.01%)and site C(18.86%).Conversely,the mean contents of silt,clay,Cr,Co,Ni,organic carbon,organic nitrogen,phenanthrene,and pyrene at site A were lower than those at site B and site *** observations are consistent with the expected preferences of horseshoe crabs to live in areas with 60%sand content,which is associated with abundant and edible clamworms in the Crocodile Island intertidal zone,Xiamen.

关键词： benthic macrofauna Crocodile Island horseshoe crab sedimentary environment intertidal zone

sedimentary environment Analysis of Ancient Sand Ridges from Zk23 Hole in the East China Sea

在线全文

学校读者我要写书评

暂无评论

Marine Science Bulletin 2009年第2期11卷 72-80页

作者：杜文博叶银灿庄振业中国水电顾问集团华东勘测设计研究院浙江杭州310014 国家海洋局第二海洋研究所浙江杭州310012 中国海洋大学海洋地球科学学院山东青岛266003

Abstract： Based on the analysis of core samples from the hole of Zk23 in the East China Sea Continental Shelf and by means of sedimentary stratigraphy, biostratigraphy and chronostratigraphy, the authors consider that the fine-sand deposition in borehole was part of buried ancient estuary sand ridges of the Yangtze River. The deposition history of study area around the hole before and after the glacial period as well as postglacial period is made clear after our research：（1） the estuarine sublayer -undersea delta facies strata was deposited under the fast sea level rise about 15 kaB.P; （2） sand ridges mostly consisting of fine-sand, were formed when the sea level was the fluctuant range of 60 - 80 m of isoba during the deglacial period around 15 - 12 kaB.P; （3） first silty clay and clay silt strata above the sand ridges were deposited during the period when the sea level rose fast from 12 to 7 kaB.P, and then it keeps stable to the present.

关键词： ancient sand ridges sedimentary environment East China Sea Continental Shelf

sedimentary environment of Late Carboniferous Tangjiatun Formation in Acheng of Heilongjiang

在线全文

学校读者我要写书评

暂无评论

Global Geology 2014年第4期17卷 206-211页

作者： WANG Fukui WU Jianan LV Shicong ZHAO Dalin QU Xiyu WANG Dehai College of Earth Sciences Jilin University Bohai Research Institute of Oilfield Exploration & Development Tianjin Branch of CNOOC School of Geosciences China University of Petroleum ( East China)

According to the lithological assemblages and elemental geochemistry of the measured profile,the authors studied the sedimentary and tectonic environment of the Late Carboniferous Tangjiatun Formation in Acheng. The results show that the trace elements of mudstone samples from Tangjiatun Formation have the characteristics of high Th,V and Cu,but low Ba,Nb and Sr. The rare earth elements are characterized by significantly light and heavy rare earth elements differentiation,relative enrichment of light rare earth elements,and a negative anomaly of δEu. The Tangjiatun Formation belongs to a marine and delta sedimentary environment,and its tectonic setting is considered as a continental island arc environment.

关键词： Tangjiatun Formation trace elements rare earth elements sedimentary environment Acheng Heilongjiang

sedimentary environment and Sequence Stratigraphy of the Asmari Formation at Khaviz Anticline, Zagros Mountains, Southwest Iran

在线全文

学校读者我要写书评

暂无评论

Open Journal of Geology 2016年第2期6卷 87-102页

作者： Abdolhosein Kangazian Mohammad Pasandideh Department of Geology Faculty of Sciences Islamic Azad University Isfahan (Khorasgan) Branch Isfahan Iran

The Oligocene-Miocene Asmari Formation is a thick sequence of shallow water carbonates of the Zagros Basin. Khaviz Anticline outcrop [near Behbahan city/Iran] was studied in this research in order to interpret the facies, depositional environment and sequence stratigraphy of the Asmari Formation succession. In this study, twelve different microfacies types have been recognized, which can be grouped into five (micro) facies associations: peritidal, lagoon, shoal, semi restricted marine and open marine. The Asmari Formation represents sedimentation on a carbonate ramp. According to the fauna data, the Asmari Formation is Oligocene (Rupelian/Chattian) to Early Miocene (Burdigalian) in age at the study area. Eight third-order depositional sequences are identified on the basis of deepening and shallowing patterns in the microfacies. The depositional sequences 0 and 1 (Rupelian-Chattian), 2, 3 and 4 (Chattian) were referred to the lower while sequences 5 and 6 (Aquitanian) were referred to the middle and sequence 7 (Burdigalian) was referred to the upper Asmari Formation. The relative sea-level curve of the Asmari basin and its matching with the global sea-level curves documented that Global eustatic phenomena affected this basin.

关键词： Asmari Formation Zagros Basin Sequence Stratigraphy sedimentary environment Oligocene-Miocene

Geochemical characteristics and sedimentary environment of the Middle Devonian organic-rich shales in the Northwest of Guizhong Depression, Southwest China

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Geology 2020年第4期3卷 567-574页

作者： Kun Yuan Wen-hui Huang Xin-xin Fang Shi-zhen Li Ting Wang Tuo Lin Guo-heng Liu China University of Geosciences(Beijing) Beijing 100083China Oil and Gas Resources Survey China Geological SurveyMinistry of Natural Resources Beijing 100083China Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China

In order to figure out the redox conditions and paleo-sedimentary environment of the Middle Devonian shales in the northwest of Guizhong Depression,the trace element analysis was conducted on the Middle Devonian cores(320.35–938.50 m)of the typical shale gas investigation well(GY-1)at a 1.50 m sampling interval through X-ray fluorescence spectroscopy(XRF)and inductively coupled plasma mass spectrometry(ICP-MS).According to the test result,the average values of V/(V+Ni),V/Cr and Ni/Co in Nabiao formation(Fm.)are larger than 0.67,4.65 and 7.71 respectively,and Nabiao *** rich in biological assemblages such as tabasheer,ammonite,*** evidences indicate the rising sea level rose relatively in the sedimentation period of Nabiao *** a deepwater shelf environment,which was favorable for the preservation of organic *** V/(V+Ni),V/Cr and Ni/Co in Luofu *** Tangting *** 0.38–0.65,0.73–4.10 and 3.70–6.72 respectively,indicating that the sea level dropped relatively in their sedimentation period,during which the water bodies became shallow,and the sedimentary environment was a weak oxidizing shallow water shelf *** addition,the variation of TOC has a high correlation with the enrichment degree of Ba element,indicating the favorable conditions for the enrichment and preservation of organic matters under an oxygen-deficient ***,according to the identification of trace element indexes,the northwest of Guizhong Depression experienced the sedimentary cycle of relative rise to relative fall of sea level from bottom to top in the Middle Devonian sedimentation *** relative sea level rose to the highest in the sedimentation period of Nabiao Fm.,in which the organic-rich shales with stable thickness and high organic content were ***,the Nabiao *** be regarded as the favorable exploration target interval in this area.

关键词： Organic-rich shale Devonian Geochemistry sedimentary environment Guizhong Depression Geological survey engineering Guizhou Province Southwest China

sedimentary environment of Middle Permian Zhesi Formation in Solon area of Inner Mongolia

在线全文

学校读者我要写书评

暂无评论

Global Geology 2014年第1期17卷 11-17,37页

作者： ZHAO Dalin WANG Dehai LV Shicong CHEN Chunhu ZHAO Yanwei College of Earth Sciences Jilin University Northeast Branch Sinopec Xinjiang Oilfield Company CNPC

Through a sampling analysis of trace elements and REE in the section of Middle Permian Zhesi Formation in Solon area of Inner Mongolia,it is found that the overall sandstone and mudstone samples are characterized by LREE-enrichment. By analysis of the discriminant index of the sedimentary environment,the tectonic setting of Zhesi Formation is determined to be a continental island arc environment. Meanwhile,according to the sedimentary structure and lithology combination,Zhesi Formation is divided into the neritic-bathyal retention-reduction environment as well as the delta front and prodelta sedimentary systems.

关键词： Permian Zhesi Formation geochemistry sedimentary environment

sedimentary environment indicators:Benzothiazole and its derivatives

在线全文

学校读者我要写书评

暂无评论

Sedimentary environment indicators:Benzothiazole and its der...

Grain-size features of aeolian sand on the east coast of Hainan Island and the revealed evolutionary processes of the sedimentary environment

中国科学院地质与地球物理研究所2001学术年会

作者： LI Yuan~1,LI Renwei~1,ZHOU Shixin~2 & LUO Binjie~2 1.Institute of Geology and Geophysics,Chinese Academy of Sciences, Beijing 100029,China 2.Lanzhou Institute of Geology,Chinese Academy of Sciences,Lanzhou 730000,China

Benzothiazoles distributional characteristics of crude oils and non-hydrocarbon fractions of source rocks in Mangya depression of the Qaidam Basin,Lunnan oil field in the Tarim Basin,Kelamayi oil field in the Junggar Basin and the Tulufan Basin oil field were *** was found that the distributions of benzothiazole are remarkable diversity in different sedimentary environmental *** swamp crude oils contain high quantity of benzothiazole and relatively high quantity of alkylthio-benzothiazole and 2(3H)-*** the quantity of the 2,2′-dithiobisbenzothiazole is relatively *** abundance of benzothiazole and 2,2′-dithiobis-benzothiazole are relatively high in semi-brackish water lacustrine crude oils,but the quantity of alkylthio-benzothiazole and 2(3H)-benzothiazolone are relatively *** benzothiazoles belong to weak acid and mild base compound,and their stabilization conditions relate to their environmental *** nitrogenous bases are in favor of alkalescence environment,while weak acid nitrogenous compounds are the main stable products under the weak acid *** have great significance in identifying the oil- and gas-formed environment and the geochemistry study of non-hydrocarbon fraction in the future.

关键词： crude oils source rock non-hydrocarbon fraction benzothiazoles sedimentary environment

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Research in Cold and Arid Regions 2010年第6期2卷 538-546页

作者： XiaoXia Liao Sen Li GuiYong Wang ZhiLun Li Desheng School of Shunde No.1 Middle School Foshan Guangdong 528300 China Institute of Resources and environment Science Foshan University Foshan Guangdong 528000 China Department of Geography South China Normal University Guangzhou Guangdong 510631 China

The Mudui stratigraphic section represents the typical records of sedimentation processes of sand dunes and interdune depressions on the east coast of Hainan *** on high-density sampling and optically stimulated luminescence(OSL) dating of the strata of the section,the grain-size composition,grain-size parameters,cumulative distribution probability curve,and grain-size-sensitivity indexes(SC/D) were *** analyzed results show that the grain-size features of aeolian sand,weakly developed sandy paleosol,two-facies(aeolian and aqueous) deposits,and lagoon deposits are all *** indicates four evolutionary phases of the sedimentary environment of the east coast of Hainan Island since 38 ka *** I:38-22 ka B.P.;phase II:22-17 ka B.P.;phase III:17-10 ka B.P.;phase IV:10 ka B.P.-*** climate experienced the hot-wet/hot-dry,hot-wet/hot-dry,and warm-wet/hot-wet fluctuations,and the sedimentary environment also underwent lagoon deposition,dune and interdune depression deposition,dune stabilization and soil development,shifting sand deposition,and evolutionary processes.

关键词： aeolian sand grain size grain-size-sensitivity index sedimentary environment east coast of Hainan