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

Geochemical,mineralogical,and petrological analyses for the interpretation of the sedimentary environment of the Middle-Late Ordovician Majiagou Formation(northern China)as a tool for more effective gas exploration

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2022年第6期19卷 2519-2532页

作者： Jie Gao Da-Wei Lv A.J.(Tom) van Loon Dun Wu Shandong Provincial Key Laboratory of Depositional Mineralization and sedimentary Minerals Shandong University of Science and TechnologyQingdaoShandong266590China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyShandong266071China College of Earth Science and Engineering Shandong University of Science and TechnologyShandong266590China Exploration Research Institute Anhui Provincial Bureau of Coal GeologyHefeiAnhui230088China

Core samples from the deeply buried Ordovician Majiagou Formation below the Huainan Coalfield(E China) have been investigated for their carbonate types,major and trace elements(including rare earth elements) and C and O isotopes,The objective was to get a better insight into the possible occurrences of gas(and possibly oil) derived from Carboniferous *** was found that the carbonates are dolomites with strongly varying amounts of CaO and *** low concentrations of SiO_(2),Al_(2)O_(3),and Fe_(2)O_(3)indicate deposition in a normal marine environment with little terrigenous input,The Na_(2)O/K_(2)O,Fe/Mn and Sr/Ba ratios,as well as the Ga values indicate mainly a marine salinity and a hot and humid *** slight depletion of Ce and Eu,the depletion of heavy rare earth elements(HREE) and the enrichment of light rare earth elements(LREE) indicate deposition in a reducing *** thus appears that the Majiagou Formation below the Huainan Coalfield closely resembles that in the eastern part of the Ordos Basin,where several gas reservoirs are present,so that the Majiagou Formation under the Huainan Coalfield represents a promising target for hydrocarbon exploration.

关键词： Majiagou Formation Middle Ordovician Major-element analysis REE analysis Trace-element analysis Hydrocarbon exploration

Characteristics of Rearranged Hopanes of Hydrocarbon Source Rocks in Saline sedimentary environment： A Case Study of the Songliao Basin

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2016年第6期90卷 2269-2270页

作者： JIANG Lian ZHANG Min LI Hongbo XIAO Qilin Key Laboratory of Exploration Technology for Oil & Gas Research Yangtze University Ministry of Education Wuhan 430100 Hunan China College of Resources and environment Wuhan 430100 Hubei China

The Songliao Basin, one of the biggest continental petroliferous basins in eastern China, is a Mesozoic- Cenozoic fault-depressed and fault-subsided basin developed on the Hercynian fold basement. Generally, rearranged hopanes are considered to be formed by clay- mediated acidic catalysis under oxic or suboxic environment, whereas high abundance of rearranged hopanes were found in hydrocarbon source rocks and crude oils that are derived from salty environment in the Songliao Basin. This phenomenon rarely happens all over the world.

关键词： Ba Characteristics of Rearranged Hopanes of Hydrocarbon Source Rocks in Saline sedimentary environment

New Discoveries of the Influence of sedimentary environment on Rearranged Hopanes in Source Rocks

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2017年第2期91卷 747-748页

作者： LI Jin ZHANG Min KONG Ting Key Laboratory of Exploration Technology for Oil&Gas Research(Yangtze University) Ministry of EducationWuhan 430100Hubei China College of Resources and environment Yangtze UniversityWuhan 430100HubeiChina Research Institute of Petroleum Exploration and Development(Langfang Branch) PetroChinaLangfang 065007HebeiChina The Key Laboratory of Gas Formation and Development PetrochinaLangfang 065007HebeiChina

Objective The distribution of rearranged hopanes in hydrocarbon source rocks is influenced by thermal maturity and original source input, and is also controlled by depositional conditions. Through comparison of lacustrine and coal-bearing source rocks, this work attempted to analyze the composition and origin of rearranged hopanes in hydrocarbon source rocks. Taken the source rocks from the Songliao Basin, Ordos Basin and Kuqa Depression as examples, we aimed to investigate the effect of the redox conditions, water salinity and oxygen content of the source-rock depositional environment on the formation of rearranged hopanes to provide theoretical basis for the genesis of rearranged hopanes.

关键词： New Discoveries of the Influence of sedimentary environment on Rearranged Hopanes in Source Rocks

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

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

在线全文

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

Genetic relationship between formation,accumulation and migration and dispersion of peat materials in Paleogene——Take the Qiongdongnan Basin as an example

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2024年第4期43卷 80-91页

作者： Xiaojing Li Zengxue Li Dongdong Wang Guangzeng Song Pingli Wang Haiyan Liu Key Laboratory of sedimentary Mineralization and sedimentary Minerals in Shandong Province Qingdao 266590China Shandong University of Science and Technology Qingdao 266590China School of Water Conservancy and environment University of JinanJinan 250022China

Coal-type source rocks include both coal and terrigenous marine source *** studying the distribution of secondary depressions,uplifts,as well as the characteristics of peat formation and accumulation in the northern marginal sea basin of the South China Sea,and combining them with coal formation characteristics observed in other basins,five genetic theories on the relationship between peat accumulation and dispersed organic matter accumulation are *** northern marginal sea basin of the South China Sea is characterized by“disadvantageous coals formation and favorable terrigenous marine source rocks formation.”This paper provides a distribution map of coal seams and terrigenous marine source rocks in the Qiongdongnan Basin and determines their distribution *** shows that the migration of sedimentary facies in the basins and inner depressions led to the formation and migration of the peat accumulation *** addition,the vertical migration of the peat accumulation centers led to planar migration,which is actually a type of coupling *** research results have revealed that the formation of coal-type source rock is *** marginal sea basin is composed of several fault-depression basins,with each basin developing a second order of depression and *** is no unified basin center or depositional center to be *** a result,the concentration centers of coal-forming materials also vary *** on the distribution characteristics of coal-type source rocks in different basins within the marginal sea basins of the South China Sea,the research results have practical significance and provide guidance for exploring coal-type oil and gas reservoirs in this area.

关键词： Coal-type source rock marginal sea basins migration of peat aggregation centers terrigenous marine source rock Qiongdongnan Basin

Girvanella fossils from the Phanerozoic:Distribution, evolution and controlling factors

在线全文

学校读者我要写书评

暂无评论

Journal of Palaeogeography 2024年第4期13卷 924-938页

作者： Hua-Shan Zhang Ming-Yue Dai Yong-An Qi Lan-Lan Han Zhong-Lei Yin Song-Hua Chen Liang-Biao Lin Institute of sedimentary Geology Chengdu University of Technology School of Resources and environment Henan Polytechnic University

Girvanella is one of the common genera of cyanobacteria that plays a monumental role in the evolution of life on Earth and the formation of *** on a detailed search in the literature of Girvanella fossils,we have compiled a global database of Girvanella fossils and revealed the evolution of Girvanella fossils throughout the *** species,Girvanella kasakiensis,Girvanella problematica,Girvanella wetheredii,and Girvanella staminea,are recognized and *** data show that Girvanella fossils have well-defined temporal distribution during the Paleozoic Era,have a significant temporal gap in the Mesozoic Era,and have only been recorded sporadically in the Cenozoic *** were relatively abundant during the Cambrian Epoch 2-Early Ordovician,Late Ordovician,Late Devonian-Mississippian,and tended to lesser degrees during the Silurian-Early Devonian,Lopingian Epoch-Middle Jurassic,and Cretaceous-Present ***,the evolution of the abundance and diversity of Girvanella fossils was fundamentally consistent and showed episodical declining during the *** further explore these relationships,we thoroughly compared them with environmental factors such as seawater carbonate saturation state,Ca2+concentration,pH values,and atmospheric partial pressure of carbon dioxide （p CO2）.This study indicates that seawater carbonate saturation state and Ca2+concentration are major controls on secular patterns of the abundance and diversity of Girvanella fossils,together with the secondary factors of pH values and p *** the long history of Girvanella fossils,their abundance and diversity offer the potential to assist the interpretation of the long-term evolution of marine and atmosphere components during the Phanerozoic.

关键词： Girvanella Temporal distribution Abundance Diversity Control factors

sedimentary dynamics and depositional model for mud accumulation in deep lake basins:A case study in the Upper Triassic Chang-7 Member, Ordos Basin, northern China

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Palaeogeography 2024年第4期13卷 775-792页

作者： Wei Yu Feng Wang Jing-Chun Tian Jiao Wang Benjamin Kneller Tian Yang Wei-Zhen Chen College of Petroleum Engineering Shandong Institute of Petroleum and Chemical Technology Key Laboratory of Deep-time Geography and environment Reconstruction and Applications of Ministry of Natural Resources Chengdu University of Technology Institute of sedimentary Geology Chengdu University of Technology University of Aberdeen School of Geoscience

Shales in deep lake basins have become the main focus of continental shale oil and gas exploration. In order to highlight the sedimentary dynamics of mud deposition in deep lake basins, a combination of core observation, thin section examination, X-ray diffraction, and QEMSCAN(quantitative evaluation of minerals by scanning electron microscopy) was used to analyze the depositional characteristics of mudrocks in the Chang-7 Member from the Yanchang Formation(Upper Triassic) in Ordos Basin, and to establish a depositional model for mud accumulation in deep lake basins. This study recognizes four mudrock lithofacies in the Chang-7 Member:(1) the laminated silt-bearing mudstone, which generally develops a binary composition of“silt-clay” or a ternary composition of “silt-clay-organic matter”;(2) the graded mudstone, mainly composed of dark gray and gray-black mudstone sandwiched by silt-bearing mudstone;(3) the massive mudstone, internally showing a uniform distribution of quartz, clay, and carbonate minerals, with also a small amount of organic detritus; and(4) the laminated shale, which is generally composed of clay laminae, and organic laminae of the former two. Sediment supply, topographic slope, and flood intensity combine to control the evolution of gravity flows and the transport and deposition of the mudrock in the Chang-7 Member. The influence of orogeny provides terrain gradient, water depth, abundant sediments at source areas, and triggering mechanism for the formation of gravity flows. Floods triggered by wetting events provide the impetus for sediment transport. Mud deposition in the Chang-7 Member was mainly related to the transport and sedimentation of mud by hyperpycnal flows and rapid sedimentation by buoyant plume flocculation. A comprehensive evolutionary model for shale accumulation in the deep lake basin is established by integrating various triggering mechanisms and mud transport sedimentary processes.

关键词： Mudrock sedimentary dynamics mechanism Depositional model Chang-7 Member Depression lake basin

Uncovering the largest negative carbon isotope excursion in Earth history

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Earth Sciences 2024年第3期67卷 885-889页

作者： Chao LI Haiyang WANG State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of TechnologyChengdu 610059China Institute of sedimentary Geology Chengdu University of TechnologyChengdu 610059China Key Laboratory of Deep-time Geography and environment Reconstruction and Applications of Ministry of Natural Resources Chengdu University of TechnologyChengdu 610059China International Center for sedimentary Geochemistry and Biogeochemistry Research Chengdu University of TechnologyChengdu 610059China State Key Laboratory of Biogeology and environmental Geology China University of GeosciencesWuhan 430074China

The carbon cycle plays a pivotal role in regulating Earth’s surface environment through atmospheric-oceanic acid-base and redox processes, functioning as the engine driving the evolution of our planet’s surface. A deep understanding of the carbon cycle’s evolution is thus essential for our understanding of the evolution of our planet’s habitability.

关键词： carbon planet evolution