A study of sequence stratigraphy of the Early Cretaceous coal-bearing series in the southeastern Songliao Basin, NE China
Kai Shao1
Longyi Shao2
Dongmin Ma3
Dongdong Wang4
Shuai Wang2
Di Gao5
1.College of Resources and Environments, Xi'an University of Science and Technology, Xi'an 710054, Shaanxi, China;State Key Laboratory of Coal Resources and Safe Mining and College of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing),Beijing 10008, China;Shannxi Coalbed Methane Development Company Limited,Xi'an 710119, Shaanxi, China2.State Key Laboratory of Coal Resources and Safe Mining and College of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing),Beijing 10008, China3.College of Resources and Environments, Xi'an University of Science and Technology, Xi'an 710054, Shaanxi, China4.State Key Laboratory of Coal Resources and Safe Mining and College of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing),Beijing 10008, China;College of Geological Science and Engineering, Shandong University of Science and Technology,Qingdao 266590, Shandong, China5.State Key Laboratory of Coal Resources and Safe Mining and College of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing),Beijing 10008, China;College of Resources and Environments, Henan Polytechnic University, Jiaozuo 454000, Henan, China
摘要：The Early Cretaceous is an important coal accumulation period in China.Abundant coal resources were formed in the southeastern margin of Songliao Basin.Sequence stratigraphy and coal accumulation of the Early Cretaceous in the southeastern margin of Songliao Basin have been studied on the basis of extensive outcrop and borehole data.Based on regional unconformity,basal erosional surfaces of incised valley fills,and abrupt depositional facies-reversal surface,six sequence boundaries have been identified,which subdivide the Early Cretaceous coal-bearing series into 5 third-order sequences.Sequence I corresponds to Huoshiling Formation,sequences Ⅱ and Ⅲ correspond to member Ⅰ and member Ⅱ of Shahezi Formation.Sequences Ⅳ and V,correspond to member Ⅰ and member Ⅱ of Yingcheng Formation.Sequence Ⅰ developed at the initial subsiding stage,sequence Ⅱ and Ⅲ developed during the stable subsiding stage,while sequence W and V developed during the basin shrinkage stage.The major coal seams were developed in the sequence Ⅱ and Ⅲ,which ensured the relative balance between the increase rate of the accommodation space and the rate of peat accumulation for a longer period,thus forming a thick coal seam.
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论文发表日期：2020-06-30
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：10( 263-272 )
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