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Discovery and its geological significance of the mantle- derived helium in the inclusions of the Ordovician oil-bearing reservoir rocks in the Huanghua depression,China

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Science China Earth Sciences 2004年第1期47卷 23-29页

作者： ZHANG Xnobao XU Yongchang SUN Mingliang CHENG Keming LIU Wenhui LIXiufen MA Liyuan State Key Laboratory of Gas Geochemistry Lanzhou Instinute of Geology.Chinese Academy of SciencesLanzhou 730000China Research Institute of Explontion and Development China National Petrole um CorpontionBeijing 100083China

The values of the helium isotopes in the inclusions of the Ordovician reservoir rocks in the Kongxi buried hill belt in the Huanghua depression were first measured and the source of helium and its geological significance were investigated in comparison with those of the helium isotopes in the conclusions in the Ordovician rocks in the Ordos basin and the Tarim basin. The input of the mantle-derived helium into the inclusions in the carbonate reservoir rocks was found from the Konggu 3 well, the Konggu 4 well, and the Konggu 7 well in the Kongxi buried hill belt. The 3He/4He and R/Ra in the conclusions in the Ordovician oil-bearing reservoir rocks in the Konggu 7 well average 2.54×10-6(3) (sample quantity, the same below) and 1.82(3), respectively. The percent of the mantle-derived helium in the inclusions of the reservoir rocks in the Konggu 7 well reaches up to an average of 23.0%(3). The age of the contribution of the mantle-derived helium to the inclusions in the Kongxi buried hill belt is in the Late Triassic or the Early Tertiary. The finding of the mantle-derived helium shows that the interaction of the deep crust with mantle and the activity of deep faults occurred, the terrestrial heat flow value was high, and mantle-derived inorganic gas pools might be formed in the Kongxi buried hill belt. The finding of the mantle-derived helium in the inclusions of oil-bearing reservoir rocks also provides a new way for researching the activity of mantle-derived matter and its associated geological problems.

关键词： oil-bearing reservoir rock mantle-derived helium geological significance Huanghua depression

Age assignment and geological significance of the “Budate Group” in the Hailar Basin

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Science China Earth Sciences 2013年第5期56卷 970-979页

作者： MENG Qi'An WAN ChuanBiao ZHU DeFeng ZHANG YanLong GE WenChun WU FuYuan Exploration and Development Research Institute Daqing Oilfield Limited Company College of Earth Sciences Jilin University State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of Sciences

Age and nature of the Budate Group in the Hailar Basin are of great significance in studying the evolution of the Hailar Basin and the Xing'an-Mongolian Orogenic Belt(XMOB).Zircon U-Pb ages of eight volcanic rocks from the Budate Group and two basement granites in the Hailar Basin were reported in this *** dating results indicated that the formation of these volcanic rocks was consistent with the emplacement of Late Paleozoic basement granite in age(356-290 Ma),i.e.,Early Carboniferous to Early Permian rather than Early *** with regional geology,it was concluded that the Budate Group is the component of the basement of the Hailar Basin,and these volcanic rocks were formed at an active continental margin,which is related to the closure of the Hegen Mountains suture *** captured Neoproterozoic zircons(814-873 Ma) were probably derived from the Neoproterozoic basement materials in the Ergun Block,implying the close genetic relationships between the Ergun Block(including the Hailar Basin) and the Siberian Block.

关键词： Budate Group volcanic rocks zircon U-Pb dating geological significance Hailar Basin

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Multi-scale fractures formation and distribution in tight sandstones—a case study of Triassic Chang 8 Member in the southwestern Ordos Basin

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Frontiers of Earth Science 2022年第2期16卷 483-498页

作者： Gaojian XIAO Ling HU Yang LUO Yujing MENG Ali Bassam Taher AL-SALAFI Haoran LIU Key Laboratory of Tectonics and Petroleum Resources China University of GeosciencesWuhan 430074China Wenhua College Wuhan 430074China Faculty of Petroleum and Natural Resources Sana’a UniversitySana’aYemen Louisiana State University Baton Rouge LA 7080USA

Fracture system is an important factor controlling tight oil accumulation in the Triassic Chang 8 Member,southwestern Ordos Basin,China.A systematic characterization of the multi-scale natural fractures is a basis for the efficient tight oil *** on outcrops,seismic reflections,well cores,well logs(image and conventional logging),casting thin sections,and scanning electron microscope observation,the multi-scale fractures occurrences and their influences on Chang 8 tight sandstone reservoirs are *** results show that three periods of strike-slip faults and four scales of natural fractures developed,namely mega-scale(length>7×10^(7) mm),macro-scale(3.5×10^(5)

关键词： natural fractures characteristics geological significance tight sandstone reservoir Upper Triassic Yanchang Formation

Geochemical characteristics and geological implication of ferromanganese crust from CM6 Seamount of the Caroline Ridge in the Western Pacific

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Journal of Oceanology and Limnology 2021年第5期39卷 1605-1621页

作者： Qing WANG Zhenyan WANG Kai LIU Quanchao CUI Xingyu SHI CAS Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Mineral Resources Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China University of Chinese Academy of Sciences Beijing 100049China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

Ferromanganese crusts(Fe-Mn crusts)grow very slow and can be treated as condensed stratigraphic sections recording paleo-oceanographic environmental information and local key geological events during the mineralization ***,textures,mineralogy,and geochemistry of a Fe-Mn crust sample from the CM6 Seamount of the Caroline Ridge in the Western Pacific Ocean were analyzed by means of electron probe microanalysis and X-ray *** Fe-Mn crust shows three layers in textural characteristics from bottom to *** lower,middle,and upper layers presence mottled,botryoidal,and columnar textures,*** vernadite,Fe hydroxide,amorphous silicate minerals,calcite,quartz,and feldspar are the main minerals of the Fe-Mn *** cobalt chronometry method,the cumulative growth time of the Fe-Mn crust was determined to be 11 Ma or 25 Ma,of which25 Ma is inconsistent with other lines of age constraint brought by dating of the *** co-existence of abundant silicate minerals and bioclasts in the middle and lower layers of the Fe-Mn crust diluted the ferromanganese oxide deposits,thus affected the texture,minerals,and geochemical characteristics of the Fe-Mn *** in Mn Co,Ni,and other elements content and the burial of opal-A recorded the expansion of oxygen minimum zone(OMZ)in the upper layer of the Fe-Mn *** addition,the highreflectivity Fe-rich laminae might indicate the surrounding volcanic *** Fe-Mn crust sample was determined to be hydrogenic by electron probe micro-analyzer(EPM A).The findings help us understand the geochemical characteristics of the Fe-Mn crust in the Caroline Ridge Seamount in the Western Pacific and the variations of paleo-oceanographic environment clues borne by the Fe-Mn crusts.

关键词： ferromanganese crust geochemistry geological significance environment influence seamount

Red Clay Sediment in the Central Chinese Loess Plateau and Its Implication for the Uplift of the Tibetan Plateau

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Journal of Mountain Science 2005年第2期2卷 137-145页

作者： SONG Yougui LI Jijun FANG Xiaomin XIA Fei DONG Hongmei State Key laboratory of Loess and Quaternary Geology InsHtute of Earth Environment Chinese Academy of Sciences Xi＇an 710075 China MOE National Laboratory of Western China＇s Environmental Systems ＆ Department of Geography Lanzhou University Lanzhou 730000 China Department of Geosciences East China Institute of Technology Fuzhou 344000 China Xi＇an University of Science and Technology Xi＇an 710054 China

The widely distributed red clay sediment underlying the Chinese Loess Plateau truly records the Neogene environmental evolution, and its genesis and development are intrinsically related to the uplift processes of the Tibetan Plateau and the evolution of East Asia monsoon system. In this paper, a detailed magnetostratigraphy of a loess-red clay section （107°13′E, 35°02′N） from the central Loess Plateau is reported. The loess-red clay sequence is composed of 175 m Quaternary loess-paleosol sequence and 128 m Neogene red clay sediments. Based on the correlation with the standard geomagnetic polarity time scale, the paleomagnetic results indicate that the age of Chaona red clay sequence extends to 08.1 Ma, which is the older red clay deposition in the central Chinese Loess Plateau. The commencement of red clay at -8.1 Ma may imply that the Ordos planation surface was broken by the movement of the Haiyuan-Liupanshan Faults, which was related to the uplift of the Tibetan Plateau induced by the collision of India Plate and Eurasian Plate. And the western part adjacent to the Tibetan Plateau was uplifted to form the embryo of the Liupan Shan （Mts.） and the eastern part was down-faulted to receive red clay deposition. We link this faulting to an initial uplift of the Tibetan Plateau. The undulating nature of the broken Ordos planation surface may explain the chronological differences and depth discrepancies among various cross-sections of red clay.

关键词： Loess-paleosol red clay sequence magnetostratigraphy planation surface geological significance