准噶尔盆地西北缘界山石炭系——二叠系与玛湖凹陷地震地层的关系  

THE RELATIONSHIP BETWEEN THE CARBONIFEROUSPERMIAN STRATA IN THE BOUNDARY MOUNTAINS OF THE NORTHWESTERN MARGIN OF THE JUNGGAR BASIN AND SEISMIC STRATIGRAPHY IN MAHU DEPRESSION

作　　者：赖世新[1] 姚卫江[1] 邹红亮[1] 胡正舟[1] 宁良[1] LAI Shi Xin;YAO Wei Jiang;ZOU Hong Liang;HU Zheng Zhou;NING Liang(Geophysics Research Institute,Research Institute of Exploration and Development,Xinjiang Oilfield Company,PetroChina,Urumqi 830013)

机构地区：[1]中国石油新疆油田公司勘探开发研究院地球物理研究所,新疆乌鲁木齐830013

出　　处：《地层学杂志》2021年第2期151-159,共9页Journal of Stratigraphy

基　　金：中国石油天然气股份有限公司科技项目(2017E-0403)资助。

摘　　要：石炭系—二叠系地层广泛分布在准噶尔盆地西北缘界山,即成吉思汗山与哈拉阿拉特山。本文针对准噶尔盆地西北缘界山石炭系—二叠系与盆地内玛湖凹陷等的地震地层,通过露头—探井—地震地层开展关联研究。界山下石炭统为海相碎屑岩地层,主要分布于成吉思汗山。上石炭统发育火山岩及海相沉积碎屑岩,二叠系下统发育一套陆相砂砾岩,主要分布于哈拉阿拉特山。盆内玛湖凹陷等的地震地层:下石炭统钻探见于中拐凸起,未获得可追踪对比有效地震反射;上石炭统佳木河组主要发育火山岩,局部变化为凝灰质砂砾岩夹火山岩层,风城组主要发育灰色白云岩、白云质泥岩,横向相变为凝灰岩或火山岩层,同位素测年结果明确时代归属上石炭统。通过探井地层岩性及同位素测年对比,地面露头区佳木河组与地震地层夏子街组具有良好的可对比性,归属下二叠统;而地震地层佳木河组则对应地面露头哈拉阿拉特山组下部的火山岩发育段(局部夹灰色灰岩透镜体);地震地层风城组主要对应露头区哈山组上部的沉积岩发育段及阿腊德依克赛组。The Carboniferous-Permian strata are well exposed in the Boundary Mountains(the Genghis Khan and Hala Arate mountains)of the northwestern margin of the Junggar Basin.Aiming at the CarboniferousPermian strata of the Boundary Mountains and the seismic stratigraphy in Mahu depression inside the Junggar Basin,the stratigraphic correlation was carried out based on outcrops,exploratory wells,and seismology.The Lower Carboniferous of the Boundary Mountains is marine clastic rocks,mainly distributed in the Genghis Khan Mountains.Volcanic rocks and marine clastic rocks form the Upper Carboniferous.A set of terrestrial sandy conglomerate strata,representing the Lower Permian,is mainly distributed in the Hala Arate Mountains.The seismic stratigraphy in the Mahu depression of the Junggar Basin can be summarized as following.The Lower Carboniferous was found in the drilling of the Zhongguai Uplift,and no effective seismic reflection can be traced andcorrelated.The Upper Carboniferous Jiamuhe Formation consists mainly volcanic rocks,sometimes tuffaceous glutenite interbedded with volcanic rocks.The Late Carboniferous Fengcheng Formation is mainly composed of gray dolomite and dolomitic mudstone,which can be laterally changed to tuff or volcanic rocks.Isotopic dating results indicate that the age of the Fengcheng Formation is Late Carboniferous.Based on the lithology and isotopic dating of the exploration wells,the Jiamuhe Formation in outcrop area can be well correlated with the Xiazijie Formation in seismic stratigraphy.They both belong to the Lower Permian.The Jiamuhe Formation in the seismic stratigraphy corresponds the volcanic rocks(with gray limestone lens in part)in the lower part of the outcropped Hala Arate Formation.The Fengcheng Formation of seismic stratigraphy mainly corresponds the upper part of the Hala Arate Formation and the Aradeyikesai Formation of the outcrop area.

关 键 词：西北缘界山 玛湖凹陷 石炭系 二叠系 地震地层 准噶尔盆地 

分 类 号：P534.45[天文地球—古生物学与地层学] P534.46[天文地球—地质学]