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The stress state of geological structure and mining dynamic disaster in fuxin basin

Journal of Coal Science & Engineering(China) 2008年第4期14卷 621-624页

作者：韩军王海兵朱光宗刘廷波 College of Resource and Environment Engineering Liaoning Technical UniversityFuxin 123000China fuxin Mining Group Fuxin 123000China

Further evidences show that most mining dynamic disasters are mainly oc- curred nearby NNE and near SN geological ***-situ stress measurement in fuxin basin shows that the orientation of major compressed stress is near *** this stress field,geological structures with deferent strike have deferent stress state and dis- place *** and near SN geological structures are compressed to thrust and come into being high stress *** and NEE geological structures are tensile to separate and not prone to being low stress *** structure is intervenient of *** NEE and near SN structures are easy to occurre mining dynamic disasters and NWW and NEE structures is 'safety' *** mining dynamic disaster is controlled by stress state of geologic structure,which is determined by its strike.

关键词： fuxin basin geological structure mining dynamic disaster stress state

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Terrestrial records of the early Albian Ocean Anoxic Event:Evidence from the fuxin lacustrine basin,NE China

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Geoscience Frontiers 2022年第1期13卷 138-157页

作者： Xiao-Tao Xu Long-Yi Shao Kenneth A.Eriksson Bo Pang Shuai Wang Cheng-Xue Yang Hai-Hai Hou College of Geoscience and Surveying Engineering China University of Mining and Technology(Beijing)Beijing 100083China Shandong Key Laboratory of Depositional Mineralization&Sedimentary Mineral Shandong University of Science and TechnologyQingdao 266590China Department of Geosciences Virginia TechBlacksburgVA 24061USA Liaoning Province Geology and Minerals Group Energy Geology Co. Ltd.Shenyang 110000China Institute of Earth Sciences China University of Geosciences(Beijing)Beijing 100083China College of Mining Liaoning Technical UniversityFuxin 123000China

The early Albian Oceanic Anoxic Event 1 b(OAE 1 b) is well documented in the Tethys, Pacific and North Atlantic, but few studies have evaluated whether or not terrestrial records of OAE 1 b exist. In order to identify terrestrial records of the early Albian OAE 1 b and to infer possible driving mechanisms, an integrated multi-proxy study from the late Aptian to Albian in the fuxin lacustrine basin was conducted,including thick, organic-rich black mudstones, total organic carbon(TOC), organic carbon isotopes(d13 Corg), mercury concentration(Hg) and results from pyrolysis analyses(S2, Tmaxand HI). Results show three distinct short-term negative d13 Corgexcursions corresponding with relatively high TOC values,which could be counterparts of the Kilian, Paquier and Leenhardt sub-events of the early Albian OAE1 b. Atmospheric CO2 concentration(p CO2) recovered from C3 plant d13 Corgcompositions indicates an increasing trend in Unit C during the early Albian, and there are three short-term increases of p CO2 corresponding to the three sub-events of OAE 1 b at this time interval. We infer that a trend of increasing p CO2 during the Kilian sub-event in the study area is closely related to volcanism. Continental weathering calculated using chemical weathering indices(CIA, WIP and MIA(O)) show an increasing trend during the OAE 1 b interval, likely resulting from warmer and more humid conditions. Mixed sources of terrestrial plants and lacustrine plankton demonstrated by pyrolysis analyses(HI vs. Tmaxand S2 vs. TOC), indicate a terrestrial contribution to the organic-rich sediments of the Kilian, Paquier and Leenhardt sub-events of OAE 1 b. We suggest that a CO2-forced greenhouse effect during the early Albian might have triggered the relatively warm and humid palaeoclimatic conditions, and intensified chemical weathering that combined to create high nutrient and organic matter levels that were flushed into lakes contributing to eutrophication and anoxia in lacustrine and in c

关键词： fuxin basin Early Albian Organic carbon isotopes Ocean Anoxic Event 1b Terrestrial records

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