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惠州凹陷珠江组泥岩地球化学特征及其地质意义
引用本文:余 烨,张昌民,李少华,朱 锐,杜家元,王 莉. 惠州凹陷珠江组泥岩地球化学特征及其地质意义[J]. 中国石油大学学报(自然科学版), 2014, 0(1): 40-49
作者姓名:余 烨  张昌民  李少华  朱 锐  杜家元  王 莉
作者单位:长江大学油气资源与勘探技术教育部重点实验室;中海石油(中国)有限公司深圳分公司;中石化胜利油田胜利采油厂;
基金项目:国家科技重大专项(2011ZX05023-002)
摘    要:为深入探讨珠江口盆地惠州凹陷珠江组沉积时期物源属性、源区构造背景及沉积环境特征,以8口井18个泥岩样品的主量元素、微量元素和稀土元素测试数据为基础,对珠江组沉积物中泥岩的地球化学元素特征进行综合分析。结果表明:珠江组源岩以上地壳以长英质岩石为主,其中东部区域为长英质和基性岩的混合物源,西部区域为长英质物源,南部区域为长英质物源和被动大陆边缘物源;东部区域的物源具有活动大陆边缘的构造背景,西部和南部区域的物源具有被动大陆边缘的构造背景;南部区域处于还原条件,水体较深,西部区域水体次深,而东部区域处于氧化条件,水体相对较浅;东部区域盐度较高,而西部和南部区域盐度较低;珠江组沉积时期研究区处于湿热的气候条件,其中西部和南部区域湿热程度较高,东部区域湿热程度较低。

关 键 词:珠江口盆地  惠州凹陷  珠江组  地球化学特征  物源分析  沉积环境
收稿时间:2013-08-11

Geochemical characteristics and geological significance of mudstones from Zhujiang formation of Huizhou depression
YU Ye,ZHANG Chang-min,LI Shao-hu,ZHU Rui,DU Jia-yuan and WANG Li. Geochemical characteristics and geological significance of mudstones from Zhujiang formation of Huizhou depression[J]. Journal of China University of Petroleum (Edition of Natural Sciences), 2014, 0(1): 40-49
Authors:YU Ye  ZHANG Chang-min  LI Shao-hu  ZHU Rui  DU Jia-yuan  WANG Li
Affiliation:YU Ye;ZHANG Chang-min;LI Shao-hua;ZHU Rui;DU Jia-yuan;WANG Li;MOE Key Laboratory of Exploration Technologies for Oil and Gas Resource in Yangtze University;Shenzhen Branch of CNOOC Limited;Shengli Oil Production Plant of Shengli Oilfield,SINOPEC;
Abstract:In order to further discuss provenance attribute, tectonic setting and sedimentary environment of Zhujiang formation in the Huizhou depression of Pearl River Mouth Basin, geochemical elements of mudstones in Zhujiang formation were comprehensively analyzed based on experimental data of the major elements, trace elements and rare earth elements of the 18samples from 8wells. The results show that the parent rocks of Zhujiang formation are mainly supracrustal felsic rocks. The principal sources of detritus in the eastern region are derived from the mixed source of felsic and basic rocks, the principal sources of detritus in the western region are derived from the felsic source, and the principal sources of detritus in the southern region are derived from the felsic source and passive margin source. The tectonic setting of the eastern provenance is similar to that of active continental margin, and the tectonic settings of the western and southern provenance are similar to that of passive continental margin. The sedimentary water during Zhujiang formation period in the southern region was relatively deep and in reduction condition. The sedimentary water in the western region was medium. The sedimentary water in the eastern region was relatively shallow and in oxidation condition. The salinity of the eastern region was higher while the salinity of the western and southern region was lower in Zhujiang formation. There was a warm-wet climate condition in the Zhujiang formation, but the warm-wet degree was relatively higher in the western and southern region, and at the same time it was relatively lower in the eastern region.
Keywords:Pearl River Mouth Basin   Huizhou depression   Zhujiang formation   geochemical characteristics   provenance analysis   sedimentary environments
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