Objective At present, there is controversy regarding the existence of marine-terrestrial transitional facies that can act as a source of shale gas. This detailed study of Carboniferous-Permian age geological data from...Objective At present, there is controversy regarding the existence of marine-terrestrial transitional facies that can act as a source of shale gas. This detailed study of Carboniferous-Permian age geological data from the northern Shaanxi area （China） provides new insight for this type of shale gas. In addition, a new deposition and accumulation pattern for this type of shale gas is established.展开更多
Objective The Ordovician Shaanxi salt basin is located in the junction of the North China Sea and the Qilian Sea.ln this basin the Majiagou Formation accumulated more than 1000m thick evaporite-carbonate sediments, a...Objective The Ordovician Shaanxi salt basin is located in the junction of the North China Sea and the Qilian Sea.ln this basin the Majiagou Formation accumulated more than 1000m thick evaporite-carbonate sediments, and this basin is divided into east and west saltern sags （ESS, WSS） according to the characteristics of geochemical analysis （Zhang Yongsheng et al., 2014）. Isotope stratigraphy of evaporite sediments represents a fundamental tool in palaeoenvironmental and palaeoclimate reconstruction. This work first illustrates the stable isotope geochemistry of the Shaanxi evaporites, which represents the most significant example of detailed facies stratigraphy for the Majiagou Formation evaporite-carbonate （M5） in Ordos epicontinental sea （Liu Jingdong et al.,展开更多
基金funded by the Geological Survey Project of China Geological Survey(No.1212011085516)Geological Survey Level 2 Project(No.121201103000150011)Basic Research Professional Expenses of CAGS(No. YYWF201609)
文摘Objective At present, there is controversy regarding the existence of marine-terrestrial transitional facies that can act as a source of shale gas. This detailed study of Carboniferous-Permian age geological data from the northern Shaanxi area （China） provides new insight for this type of shale gas. In addition, a new deposition and accumulation pattern for this type of shale gas is established.
基金This work was funded by the National Key R&D Program of China(grant No.2017YFC0602806)Geological Survey Project of China Geological Survey(grant No.121201103000150011 and 121201103000168508)Open Project of State Key Laboratory of Resource and Prospecting(grant No.PRP/open-1308)
文摘Objective The Ordovician Shaanxi salt basin is located in the junction of the North China Sea and the Qilian Sea.ln this basin the Majiagou Formation accumulated more than 1000m thick evaporite-carbonate sediments, and this basin is divided into east and west saltern sags （ESS, WSS） according to the characteristics of geochemical analysis （Zhang Yongsheng et al., 2014）. Isotope stratigraphy of evaporite sediments represents a fundamental tool in palaeoenvironmental and palaeoclimate reconstruction. This work first illustrates the stable isotope geochemistry of the Shaanxi evaporites, which represents the most significant example of detailed facies stratigraphy for the Majiagou Formation evaporite-carbonate （M5） in Ordos epicontinental sea （Liu Jingdong et al.,
