Cenozoic giant coal-bearing basin belt discovered in China's sea and its adjacent areas  

作　　者：Gongcheng Zhang Ying Chen Dongdong Wang Zengxue Li 

机构地区：[1]College of Earth Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,China [2]China National Offshore Oil Corporation(CNOOC)Research Institute Co.,Ltd.,Beijing 100028,China [3]Department of Geology,Northwest University,Xi’an 710000,China

出　　处：《Acta Oceanologica Sinica》2023年第3期101-112,共12页海洋学报（英文版）

基　　金：The Ministry of Land and Resources Project of Oil and Gas Resource Investigation and Evaluation under contract Nos XQ-2004-05 and XQ-2007-05;the National Key Basic Research Program of China(973 Program)under contract No.2009CB219400;the National Science and Technology Major Project under contract Nos 2008ZX05025,2011ZX05025 and2016ZX05026;the National Natural Science Foundation under contract Nos 41872172 and 42072188;the Research and Innovation Team Support Program of Shandong University of Science and Technology under contract No.2018TDJH101;Hebei Provincial Resources Survey and Research Laboratory Open Foundation。

摘　　要：Sea area is an important area of oil and gas exploration in China.It has been found that China's sea area mainly consists of coal type oil and gas,and the exploration of coal-bearing series source rocks has become an important part of oil and gas exploration there.Through years of comprehensive geological research in China's sea area,it has been revealed that it has undergone multiple occurrences of tectonic opening and closing movements in varying degrees in the Paleogene,forming 26 Cenozoic sedimentary basins of various types,such as active continental margin,passive continental margin,transitional continental margin and drift rift basins.In the present study,it is observed for the first time that coal type source rocks are mainly developed in 14 continental margin basins in China's sea area,revealing that a very large C-shaped coal-bearing basin group developed there in the Cenozoic.Next,based on the coupling analysis of paleoclimate,paleobotany,paleogeography and paleostructure,it is observed that there are five coal-forming periods in China's sea area,namely the Paleocene,Eocene,early Oligocene,late Oligocene and Miocene-Pliocene,and the coal-forming age is gradually new from north to south.It is also found that the coal seams in the sea area are mainly developed in three coal-forming environments in Cenozoic,namely delta,fan delta and tidal flat-lagoon.The coal seams developed in different environments are characterized by thin thickness,many layers and poor stability.However,the coal-bearing series source rocks in China's sea area have a wide distribution range,very high thickness and large amount,thus forming a material basis for the formation of rich coal type oil and gas.

关 键 词：coal-bearing basin belt coal-forming period coal-forming sedimentary environment China's sea area 

分 类 号：P618.13[天文地球—矿床学]