准噶尔盆地二叠系及中生界划分对比

CLASSIFICATION AND CORRELATION OF PERMIAN AND MESOZOIC IN JUNGGAR BASIN

本文以区域地质资料为基础,结合构造、沉积发育规律和岩性、电性、古生物特征以及地震层序的划分与对比,提出了准噶尔盆地二叠系及中生界新的划分对比意见.认为风城组时代应为晚二叠世,与盆地东部平地泉组对比,下乌尔禾组与梧桐沟组对比;原百口泉组为中三叠世早期沉积、应归属于克拉玛依组,而原划为上二叠统的上乌尔禾组应与南缘、东部的上仓房沟群对比,改属下三叠统;并对西北缘侏罗系和上白垩统的划分对比提出了新的见解。

This paper presents opinions to completely classify and orrelate the Permian and Mesozoic strata in Junggar Basin on the basis of regional geological data integrated with the tectonic and depositional developments, petrophysicalproperties, palaeontologic characteristics and seismic sequence classification and correlation. It concluded thatFengcheng formation should be classified into late Permian in period, being correlated with Pingdiquan formation ineastern Basin ; Lower Wuerhe formation be correlated with Wutonggou formation. The former Baikouquan formationbeing sediments of early in Middle Permian ,should be classified into Karamay formation, while Upper Permian shouldbe correlated with Upper Cangfanggou group in southern margin and east part of Junggar Basin,which is modified tobe Lower Triassic. In addition,some new views have been provided for correlation of Jurassic and Upper Cretaceous inthe northwestern margin.