渤中凹陷西斜坡碎屑锆石特征及物源定量示踪  

Clastic Zircon Characteristics and Quantitative Tracing of Provenances in Western Slope of Bozhong Sag

作　　者：余宏忠[1] 

机构地区：[1]中国石油大学,北京102249

出　　处：《特种油气藏》2014年第6期42-46,143,共5页Special Oil & Gas Reservoirs

基　　金：国家重大科技专项"近海隐蔽油气藏勘探技术"(2008ZX05023-002)

摘　　要：通过对渤中凹陷西斜坡沙河街组、东营组的锆石形态特征分析,识别出岩浆成因和变质成因2类锆石,分别反映了母岩为岩浆岩和变质岩的物源。在锆石成因分析基础上,采用锆石U-Pb定年技术,结合区域沉积演化,定量示踪了沙一段、东二下段和东二上段的物源位置及不同的岩性组合。该物源示踪结果对渤中凹陷西斜坡古近系沉积相带的展布以及有利砂体的预测都具有重要的指导意义。Based on analysis of the morphological characteristics of zircons in both Shahejie Fm and Dongying Fm in western slope of Bozhong Sag,magmatogenic and metamorphogenic zircons are identified,which reflect the provenances of magmatic rock and metamorphic rock respectively. Through zircon genesis analysis,using the zircon U- Pb dating technique,and considering regional sedimentary evolution,this paper quantitatively traces the provenance position and different lithologic association of Es1,lower Ed2 and upper Ed2. The provenance tracing results are very instructive in either understanding the distribution of the Palaeogene sedimentary facies belts or predicting the favorable sands in the western slope of Bozhong Sag.

关 键 词：锆石成因 锆石定年 物源示踪 物源分析 物源转换 渤中凹陷 

分 类 号：TE121.3[石油与天然气工程—油气勘探]