阜康凹陷下侏罗统物源变化对博格达山隆升的响应  

Provenance Change in the Lower Jurassic in Fukang Depression(Junggar Basin)and Its Response to the Uplift of the Bogda Mountains

作　　者：杨仁超 邸建强 庞玉茂 张学才 方旭庆 冯乔 汪勇 李阳 董亮 YANG RenChao;DI JianQiang;PANG YuMao;ZHANG XueCai;FANG XuQing;FENG Qiao;WANG Yong;LI Yang;DONG Liang(College of Earth Science and Engineering,Shandong University of Science and Technology,Qingdao,Shandong 266590,China;Oil and Gas Exploration and Management Center of SINOPEC Shengli Oilfield Branch,Dongying,Shandong 257099,China)

机构地区：[1]山东科技大学地球科学与工程学院,山东青岛266590 [2]中国石油化工股份有限公司胜利油田分公司油气勘探管理中心,山东东营257099

出　　处：《沉积学报》2024年第4期1326-1341,共16页Acta Sedimentologica Sinica

基　　金：中国—东盟海上合作基金项目(12120100500017001)。

摘　　要：【目的】准噶尔盆地阜康凹陷中东部下侏罗统八道湾组和三工河组是当前油气勘探的重点层位,但由于其物源体系尚不明确,严重制约了该区沉积体系研究和油气勘探进程。【方法】基于八道湾组和三工河组的碎屑成分、古流向、重矿物、阴极发光和砂地比平面分布等相关分析,对阜康凹陷中东部早侏罗世物源体系及对博格达山隆升的响应特征进行了探讨。【结果与结论】结果显示,研究区八道湾组主要受控于东北部克拉美丽山物源体系,北天山及博格达山物源的影响程度有限;而三工河组不仅存在继承性的克拉美丽山及北天山物源输入,又叠加了来自博格达山的分支物源,且博格达山物源的影响不断增强。研究区下侏罗统物源变化清晰地响应了博格达山自东向西不断增强的隆升过程。阜康凹陷南斜坡表现为构造南倾的特征,下侏罗统东南物源的存在为地层岩性圈闭的发育奠定了物质基础,对该区油气勘探具有重要的指示意义。[Objective]The Lower Jurassic Badaowan and Sangonghe Formations in the middle and eastern parts of the Fukang Depression are key intervals for oil and gas exploration,but they are restricted due to their unclear prove⁃nance.[Methods]In this study,the provenance was analyzed from rock clastic composition,paleocurrent analysis,heavy mineral composition,cathodoluminescence properties and the proportion of sandstone in the strata.[Results and Conclusions]The study area is dominated by the Karameri Mountain provenance during the Lower Jurassic,with limited Northern Tianshan and Bogda Mountains provenance.The Sangonghe Formation was influenced by prove⁃nances inherited from both the Kalameri Mountain and the northern Tianshan,enhanced by a superposed branch provenance from the Bogda Mountains.In the study area,which has a south-dipping structural background,it is clear that the provenance changed due to the increasing east-to-west uplift of the Bogda Mountains.This southeasterly Low⁃er Jurassic provenance is the scenario for stratigraphic-lithological traps to develop on the southern slope of the Fu⁃kang Depression.This may be greatly significant for future oil and gas exploration.

关 键 词：阜康凹陷 博格达山 下侏罗统 物源分析 沉积体系 

分 类 号：P512.2[天文地球—地质学]