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地质学报（英文版）
中国地质学会
地质学报（英文版）

中国地质学会

程裕淇

双月刊

1000-9515

geoacta@public3.bta.net.cn

010-68999024

100037

北京复外百万庄26号

地质学报（英文版）/Journal Acta Geologica SinicaCSCDCSTPCDSCI
查看更多>>本刊以反映中国地质界在地质科学理论研究、基础研究和基本地质问题研究的最新、最重要成果为主要任务，兼及新技术与方法。全面系统地向国外读者介绍中国地学研究的新进展。
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    Geochemical Behavior and Enrichment Mechanisms of Arsenic in Low-Rank Coal,Baiyinhua Depression,Erlian Basin

    DAI GuobiaoTANG YuegangLIU AoWANG Xiaoshuai...
    1574-1585页
    查看更多>>摘要：In this study,the abundance of trace elements in the Baiyinhua depression coal and its relationship with the coal depositional environment was examined.(1)The content of arsenic in the Baiyinhua depression coal is that of a typically high arsenic coal from the late Mesozoic of China.The average arsenic content of Baiyinhua coal is 24.93 times,the highest being 132.71 times,that of Chinese coal.Coal rank is not a controlling factor affecting arsenic enrichment in coal.(2)Arsenic is primarily enriched in the syngenetic and diagenetic stages,the enrichment being most obvious in the syngenetic stage,with the intrusion of a magmatic-hydrothermal solution in the epigenetic stage also providing rich sources of arsenic.(3)The Baiyinhua coal-forming plant material is mainly woody plants.The coal seam was covered with deep water,the oxygen supply was very weak,the bacteria very few,the sedimentary environment of the swamp relatively calm and the degree of damage to the woody plants is very low.The minerals in the coal are mainly quartz and clay minerals.The coal ash yield of Baiyinhua is small,with SiO2,Al2O3,MgO,K2O,TiO2,MnO and P2O5 mainly being combined in the inorganic minerals of the coal.
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    • 国家科技期刊平台
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    Constraints of C-O-Sr Isotope and Elemental Geochemistry on Carbonate Sedimentary System Paleoenvironments of the Middle Jurassic Hepingxiang Formation,Western Simao Basin

    LOU PengchengMIAO ZhongyingZHENG MianpingLIU Yuanying...
    1586-1601页
    查看更多>>摘要：Western Yunnan is an important area for Mesozoic marine strata,development of which helps to reconstruct paleoenvironments in the eastern Tethys.To bring knowledge of eastern Tethys up to that of western Tethys,this study focuses on its sedimentary characteristics and paleoenvironmental significance concentrating on the Xiushan section of the Simao Basin with analyses of the petrology,element geochemistry,and C-O-Sr isotopes.Samples are micrite,bioclastic limestone,marl,and mixed calcareous clastic rocks with the 87Sr/86Sr values of limestone ranging from 0.708255 to 0.708933;the δ13C values of the limestone range from-5‰ to+1.5‰ and the δ180 values range from-13.7‰ to-9.1‰.Based on the results,it is concluded that the Middle Jurassic limestones in the Simao Basin were deposited in a tidal flat environment with a strong influence of terrigenous input.At least one transgression event occurred during the depositional period.The paleoclimate as a whole changed from dry hot to humid hot and back to dry hot again.These enriched and improved results provide further data support for a comparison of the paleoenvironments between the eastern and western Tethys.
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    • 国家科技期刊平台
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    Assessment of in-situ CO2 Sequestration Potential and Enhanced Coalbed Methane(ECBM)Production of Continental Coal-bearing Basins in China

    LI YaohuaWANG YangBI CaiqinWANG Qianyou...
    1602-1614页
    查看更多>>摘要：The utilization of CO2-Enhanced Coal Bed Methane(CO2-ECBM)technology is pivotal in realizing the environmentally responsible and efficient exploitation of Coalbed Methane(CBM)energy resources.The optimization of carbon capture,utilization,and storage(CCUS)for carbon reduction mandates a nuanced understanding of the diverse geological attributes present in CBM reserves globally.Traditional estimations of CO2-ECBM's carbon sequestration potential have predominantly relied on rudimentary empirical models,notably those proposed by the United States Department of Energy(DOE),which overlook the intrinsic geological conditions and the physicochemical properties of subsurface fluids.Addressing these limitations,our study implements the advanced DR/Henry mixed adsorption model in tandem with the Peng-Robinson equation of state(PR-EOS).This approach meticulously identifies the critical parameters governing the mass exchange ratios between CO2 and CH4,pertinent to in-situ geological environments.Subsequently,we have formulated a comprehensive carbon sequestration potential assessment framework.This innovative model adheres to the mass conservation principles for individual CO2 and CH4 components,taking into account the specific surface and stratigraphic conditions prevalent.Employing this refined methodology,we evaluated the CO2-ECBM carbon sequestration potential of the 40 evaluation units of extensional,compressive,and cratonic continental coal bearing basins in China's three major temperature-pressure systems across different depth domains and coal ranks within 2000 m.Our findings reveal that the theoretical carbon sequestration capacity of China's continental coal-bearing basins is approximately 59.893 billion tons.Concurrently,the potential ECBM output stands at an estimated 4.92 trillion cubic meters,underscoring the substantial environmental and energy benefits inherent in harnessing CO2-ECBM technology effectively.The regional analysis revealed that North and Northwest China hold the highest sequestration and recovery potential,followed by the Northeast and Southern regions,respectively.Specific areas,including the eastern edge of the Ordos Basin and southern Junggar Basin,Qinshui,Huoxi,Xishan,and other areas in Shanxi,present promising future prospects for geological carbon storage in unrecoverable coal seams.
      原文链接:
    • 国家科技期刊平台
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    Hydrochemical Constraints on the Flowing Paths of Groundwater in Limestone Reservoirs beneath the Pingdingshan Coalfield in North China

    WU ZhanhuiWANG XinyiLI JiexiangCUI Junchao...
    1615-1636页
    查看更多>>摘要：The karst groundwater of Cambrian limestone may become an important water source for industry and agriculture in the Pingdingshan area,and is also a potential threat to mining safety.Therefore,to find out the origin,flow paths,and hydrogeochemical processes of karst groundwater beneath the Pingdingshan coalfield,a total of 16 water samples were collected.Our findings confirmed that the karst groundwater is mainly recharged by precipitation.The precipitation can directly supply the deep aquifer of the karst water system through the southwest limestone outcrops,and this area mostly includes the southern part of mines No.11,No.9,and the hidden outcrops in the southern part of mine No.2.What is more,the areas adjacent to the synclinal axis,including mines No.10,No.12,and No.8,may be the main discharge areas.A mixing model of 87Sr/86Sr and Sr showed that in the southwest Pingdingshan coalfield,the proportion of precipitation decreased gradually from the recharge area to the discharge area,ranging from 89.1％to 17.1％.Besides,the northeast Pingdingshan coalfield is another recharge area for the whole karst system,thus,the infiltrating groundwater will indirectly supply the deep aquifer through Quaternary deposition near the mine No.13.Our research results can provide theoretical support for the prevention and control of groundwater disasters and the development and utilization of regional groundwater resources in the coalfield in Northern China.
      原文链接:
    • 国家科技期刊平台
    • NETL
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    A Methodology for Comprehensive Quality Evaluation of Underground Space

    GUO JunhanLIU KaiMA Yan
    1637-1648页
    查看更多>>摘要：Underground space resources are important for the purposes of urban sustainable development and are a significant means by which to realize three-dimensional urban development.A reasonable and scientific evaluation of underground space resources is the foundation for the rational use of land resources and urban planning.On the basis of the geological conditions used by preceding researchers,this study adds the analysis of two influencing factors of social and economic value,alongside existing facilities and protection needs.The evaluation index is quantified and the comprehensive quality evaluation system of underground space resources is constructed.Finally,taking the Nanshan District of Shenzhen as an example,the evaluation of underground space resources is carried out.The results show that for shallow underground space,the comprehensive quality of underground space resources development in Nanshan District is generally high.Nantou,Nanshan and Yuehai streets are recommended as areas to actively develop underground space,whereas the Qianhai and Houhai areas are recommended to be used with caution in the development and construction of their underground space.In addition,this study also provides a reference for the purposes of underground space planning in the Nanshan district of Shenzhen.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
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    Twin Horsetailing Structures in the Extensional Regime based on Physical Experiment

    LAO HaigangXU HongyuanWANG YongshiMAO Cui...
    1649-1658页
    查看更多>>摘要：Horsetailing is an important feature to identify the strike-slip structure and indicates the movement mode of the fault.However,the formation mechanism of horsetailing in the extensional regime remains unclear.In this study,the formation process of horsetailing is reproduced through physical experiment,simulating the Linnan sag in the extensional regime.The results of the physical experiment demonstrates that the formation of the horsetailing in the extensional regime requires two phases of non-coaxial stretching plus the segment of the principal fault.The stretching distance in the early phase is slightly smaller than that in the middle-late phase.The segment point of the principal fault is only the intersection of the horsetailing structure and the principal fault.The horsetailing formed in the extensional regime is different from that in the strike-slip regime.For the formation of structure,the principal fault is dip-slip in the early phase and then becomes an oblique-slip in the middle-late phase,and the horsetailing is composed of the middle-late new tensile faults.The fault properties of the horsetailing in the extensional regime has important guiding significance for the longitudinal fluid migration along the fault in petroliferous basins.
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    • 国家科技期刊平台
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    Numerical Study on the Mechanical Behavior of Hydraulic Fractures under Stress Disturbance,based on a Multi Pb-GBM Method

    LI GuangLIU ShuaiqiMA FengshanGUO Jie...
    1659-1671页
    查看更多>>摘要：Water inrush is a common disaster in submarine mining.The key to preventing this disaster is to restrict the water-conducting fissure propagation induced by mining from forming a flow channel to communicate with the overlying aquifer.The mechanical behavior of hydraulic fractures under stress disturbance lies at the heart of the problem.Hence,the multiple parallel bond—grain-based model(multi Pb-GBM)is introduced to explore the hydraulic fracture evolution law of crystalline granite under the influence of stress disturbance.The results show that:hydraulic fracturing under stress disturbance is clearly affected by the stress wave frequency;the higher the frequency is,the more difficult it is to crack,but the crack propagation speed is faster after crack initiation;the propagation direction of a crack is deflected towards the propagation direction of the stress wave and the crack dip angle is controlled by the maximum principal stress;the internal crystal boundary of the same mineral is the most stable one among the three contacts,the contact boundary between different minerals being the most fragile one.This research not only has a practical application value to seabed mining engineering,but also has important theoretical significance in enriching deep rock mechanics theory.
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    • 国家科技期刊平台
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    The Source Crater of Depleted Shergottites

    LUO FangluXIAO ZhiyongXU RuiCHANG Yiren...
    1672-1681页
    查看更多>>摘要：Depleted shergottites record unique information about the primary composition and differentiation of the mantle of Mars.Their petrology,geochemistry,and cosmic ray exposure and crystallization ages suggest that most of them were excavated by a single young impact in the Amazonian-aged lava flows of the Tharsis and Elysium volcanic provinces.However,the difficulties of deriving consistent model ages for individual craters and inadequate evaluation of 3-7 km craters capable of ejecting martian meteorites have not been settled.Here we perform detailed geological investigations and crater statistics in patches of impact melt deposits for potential source craters of depleted shergottites with D＞3 km,especially those in the Tharsis and Elysium volcanic provinces.By excluding the effect of heterogeneous textures across ejecta deposits,which hinder straightforward extraction of superposed production populations,our systematically updated model ages reveal that Chakpar crater at the northern flank of Ascraeus Mons is the best-fit candidate.The local context of this crater permits establishing a link between the meteorites and specific lava flows.The long-lived volcanic center here may experience an eruption and/or local deposition hiatus for about 1.8 billion years,and abundant subsurface water existed when the impact occurred at about 1.1 million years.
      原文链接:
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