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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
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作者 Jie Gao Da-Wei Lv +1 位作者 A.J.(Tom) van Loon Dun Wu 《Petroleum Science》 SCIE CAS CSCD 2022年第6期2519-2532,共14页
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... 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 coals.It was found that the carbonates are dolomites with strongly varying amounts of CaO and MgO.The 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 climate.The 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 environment.It 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. 展开更多
关键词 Majiagou Formation Middle Ordovician Major-element analysis ree analysis Trace-element analysis Hydrocarbon exploration
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Combined apatite fission-track dating, chlorine and REE content analysis by LA-ICPMS 被引量:4
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作者 Jianzhang Pang Dewen Zheng +6 位作者 Yan Ma Ying Wang Ying Wu Jinglin wan Jingxing Yu Youjuan Li Yizhou Wang 《Science Bulletin》 SCIE EI CAS CSCD 2017年第22期1497-1500,共4页
As one of the best established low temperature thermochronology techniques,apatite fission-track(AFT)analysis has proved an important tool for constraining a wide variety of upper crustal processes,e.g.,landscape evol... As one of the best established low temperature thermochronology techniques,apatite fission-track(AFT)analysis has proved an important tool for constraining a wide variety of upper crustal processes,e.g.,landscape evolution,hydrocarbon exploration and tectonics[1].The most common method employed for AFT analysis is the external detector method(EDM)[1]and this involves the thermal neutron irradiation of samples for determination of 展开更多
关键词 chlorine and ree content analysis by LA-ICPMS CL ree Combined apatite fission-track dating
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