东秦岭—大别造山带北侧岩石组构特征及中、新生代差异变形机制

中国石油勘探 ›› 2011, Vol. 16 ›› Issue (4): 42-47,4.

东秦岭—大别造山带北侧岩石组构特征及中、新生代差异变形机制

程喆,郭齐军,胡望水,汤济广,黄泽光

中国石化石油勘探开发研究院;中国石化油田勘探开发事业部;长江大学地球科学学院;中国石化石油勘探开发研究院无锡石油地质研究所

出版日期:2011-08-15 发布日期:2011-08-15
基金资助:
国家级“全国油气资源战略选区调查与评价项目”(XQ-2007-02)

Petrofabric Features and Meso-Cenozoic Differential Deformation Mechanism in Northern Side of East Qinling-Dabie Orogenic Belt

Cheng Zhe,Guo Qijun,Hu Wangshui,Tang Jiguang and Huang Zeguang

Cheng Zhe1,Guo Qijun2,Hu Wangshui3,Tang Jiguang3,Huang Zeguang4 1.Petroleum Exploration & Production Research Institute,SINOPEC,Beijing 100083;2.Exploration and Production Department,SINOPEC,Beijing 100728;3.College of Geosciences,Yangtze University,Jingzhou City,Hubei Province 434023;4.Wuxi Research Institute of Petroleum Geology,Petroleum Exploration & Production Research Institute,SINOPEC,Wuxi City,Jiangsu Province 214151

Online:2011-08-15 Published:2011-08-15

摘要/Abstract

摘要： 受不均衡的陆内造山及多期构造叠加复合,东秦岭—大别造山带北侧中、新生代具差异构造变形。通过4条典型岩石组构剖面的建立,各组构极密图均显示斜方或三斜对称,且各剖面南段均发育小圆环带,反映了各样品均经历了NE—SW和NW—SE两期不同方向的近水平挤压作用,其中商城—潢川以西NE—SW方向挤压作用为主,而以东则两方向的挤压作用强度较为类似,且西峡—伊川剖面南段还发生过强烈的垂向隆升作用。以商城—潢川一带为中间调节带,印支期与中燕山期强烈逆冲推覆作用从东向西发生时空迁移,加之不均匀收缩变形过程中横向断层调节,且新近纪郯庐断裂作用的复合,是造成东秦岭—大别造山带北侧中新生代差异构造变形的根本原因。

关键词: 岩石组构, 逆冲推覆, 差异变形, 中新生代, 东秦岭—大别造山带

Abstract: Differential deformation occurs in Meso-Cenozoic in northern side of East Qinling-Dabie orogenic belt due to imbalanced intercontinental orogeny and multiple tectonic superimposition and composition. The establishment of four typical petrofabric profiles demonstrates that fabrics are symmetrical orthorhombically or triclinically, and the southern part of each profile develops small circle girdle. The petrofabric features show that all samples undergo approximately horizontal NE-SW and NW-SE compression of two periods. The NE-SW compression in the west of Shangcheng- Huangchuan is the primary, but the intensity of compressions of two directions is similar in the east, and the southern Xixia-Yichuan profile undergoes intense uplift vertically. Intense overthrust tectonics in Indosinian and Middle Yanshanian taking Shangcheng-Huangchuan as an intermediate accommodation occurs temporal-spatial migration from east to west. Moreover, lateral fault accommodation during imbalanced deformation, and Neogene Tanlu fracturing are all fundamental causes of Meso-Cenozoic differential deformation in northern side of East Qinling-Dabie orogenic belt.

Key words: petrofabric, overthrust tectonic, differential deformation, Meso-Cenozoic, East Qinling-Dabie orogenic belt

中图分类号:

P618.13

程喆, 郭齐军, 胡望水, 汤济广, 黄泽光. 东秦岭—大别造山带北侧岩石组构特征及中、新生代差异变形机制[J]. 中国石油勘探, 2011, 16(4): 42-47,4.

Cheng Zhe, Guo Qijun, Hu Wangshui, Tang Jiguang and Huang Zeguang. Petrofabric Features and Meso-Cenozoic Differential Deformation Mechanism in Northern Side of East Qinling-Dabie Orogenic Belt[J]. China Petroleum Exploration, 2011, 16(4): 42-47,4.

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