[an error occurred while processing this directive] 世界地质 2020, 39(2) 344-352 DOI:   10.3969/j.issn.1004-5589.2020.02.009  ISSN: 1004-5589 CN: 22-1111/P

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渤中凹陷
变质岩
太古界
潜山
鉴别特征
渤中凹陷
本文作者相关文章
宋国民
张艳
李慧勇
高有峰
刘小健
郭天婵
PubMed
Article by Song G
Article by Zhang Y
Article by Li H
Article by Gao Y
Article by Liu X
Article by Guo T
渤中凹陷19-6区太古界潜山变质岩岩石类型及鉴别特征
宋国民1, 张艳1, 李慧勇2, 高有峰1, 刘小健2, 郭天婵1
1. 吉林大学地球科学学院, 长春 130061;
2. 中海石油(中国)有限公司天津分公司, 天津 300459
摘要: 渤中凹陷19-6区域现有钻井揭示,研究区太古界潜山变质岩岩石类型主要有区域变质岩和动力变质岩2类,常见的7种岩性为变质花岗闪长岩、变质二长花岗岩、花岗闪长质片麻岩、碎裂变质花岗闪长岩、碎裂变质二长花岗岩、长英质碎斑岩和花岗闪长质初糜棱岩。笔者从岩石矿物成分及组合、结构构造等方面详细描述了这7种变质岩及其鉴别特征,在此基础上研究几种变质岩与裂缝之间的关系,结果表明其中的变质二长花岗岩与花岗闪长质片麻岩裂缝密度相差>2倍,研究显示不同岩石矿物成分尤其是暗色矿物的含量与岩石产生裂缝能力有关。
关键词 渤中凹陷   变质岩   太古界   潜山   鉴别特征   渤中凹陷  
Types and identification characteristics of Archean metamorphic rocks of Buried Hill in 19-6 area of Bozhong sag
SONG Guo-min1, ZHANG Yan1, LI Hui-yong2, GAO You-feng1, LIU Xiao-jian2, GUO Tian-chan1
1. College of Earth Sciences, Jilin University, Changchun 130061, China;
2. Tianjin Branch of China National Offshore Oil Corporation, Tianjin 300459, China
Abstract: Existing drilling in the 19-6 area of Bozhong sag reveals that there are mainly two types of metamorphic rocks in the Archean Buried Hill metamorphic rocks in the study area: regional metamorphic rocks and dynamic metamorphic rocks. The metamorphic rocks comprise metamorphic granodiorite, metamorphic monzogranite, granodioritic gneiss, cataclastic metamorphic granodiorite, cataclastic metamorphic monzogranite, felsic porphyroclasite and granodioritic protomylonite. The authors describe the identification characteristics of seven metamorphic rock types in detail from the aspects of mineral composition and assemblage, texture and structure, and discuss the relationship between rock types and fractures. The fracture density of metamorphic monzogranite is as twice high as that of granodiorite gneiss, indicating that the content of different rock minerals, especially dark minerals, affects the ability of rocks to produce fractures.
Keywords: Bozhong sag   metamorphic rocks   Archean   Buried Hill   identification characteristics   Bozhong sag  
收稿日期 2019-05-06 修回日期 2019-12-11 网络版发布日期  
DOI: 10.3969/j.issn.1004-5589.2020.02.009
基金项目:

国家重点研发计划项目(2017YFC0601405)与中海石油(中国)有限公司天津分公司攻关项目(CCL2018TJXSWST0084)联合资助。

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