鄂尔多斯盆地南缘晚奥陶世台缘生物礁发育模式  

A depositional model of platform marginal reef of the late Ordovician in the southern margin of the Ordos Basin

作　　者：庞军刚 王欣月 李文厚[2] 国吉安 常梁杰 PANG Jun-gang;WANG Xin-yue;LI Wen-hou;GUO Ji-an;CHANG Liang-jie(School of Earth Science and Engineering,Shaanxi Key Laboratory of Petroleum Accumulation Geology,Xian Shiyou University,Xian 710065,China;Geological Department,State Key Laboratory of Continental Dynamics,Northwest University,Xian 710069,China;No.2 Comprehensive Geophysical Prospecting Brigade Shaanxi Geological Mining Co.,Ltd.,Xian 710016,China)

机构地区：[1]西安石油大学地球科学与工程学院陕西省油气成藏地质学重点实验室,西安710065 [2]西北大学地质学系,大陆动力学国家重点实验室,西安710069 [3]陕西地矿第二综合物探大队有限公司,西安710016

出　　处：《兰州大学学报（自然科学版）》2022年第4期458-464,共7页Journal of Lanzhou University(Natural Sciences)

基　　金：“十三五”国家科技重大专项(2016ZX05050006);西安石油大学科研创新团队项目(2013KYCXTD03);西安石油大学研究生创新与实践能力培养计划项目(YCS21112050);陕西省教育厅专项项目(2013JK0844,17JK0605)。

摘　　要：通过对盆地南缘晚奥陶世典型生物礁剖面的解剖,对其生物礁发育旋回、造礁及附礁生物、主要岩石类型、沉积微环境等进行分析;恢复晚奥陶世平凉期和背锅山期沉积相展布,明确生物礁的分布.研究认为鄂尔多斯盆地南缘晚奥陶世台地边缘广泛发育生物礁体,其与滩相构成碳酸盐台地边缘礁滩复合体,发育程度主要受同沉积期构造活动和海平面变化控制,建立了台地边缘生物礁沉积模式,生物礁储层可以作为今后天然气勘探的重点目标之一.The typical reef section of the late Ordovician in the southern margin of the Ordos Basin was anatomized, particularly concerning the reef sedimentological cycles, reef-forming organisms and organisms attached to the main rock types, sedimentary sub-environments. The distribution of sedimentary facies and therefore of reefs in plan-view during periods of the late Pingliang and Beiguoshan were reconstructed. The research showed that it was an epicontinental sea rimmed platform during late Ordovician of the Ordos Basin, in which reefs and the associated shoals making up the complexity of them were extensively developed and the prevalance of reefs was probably mainly controlled by sea level fluctuations and tectonic activities. The depositional model of the platform marginal reef was established, and reef reservoir can act as one of the potentially important targets for gas exploration in the future.

关 键 词：台缘生物礁 发育模式 主控因素 鄂尔多斯南缘 晚奥陶世 

分 类 号：P531[天文地球—古生物学与地层学]