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| 东秦岭-大别造山带北侧中新生代差异构造变形 | |
| 引用本文： | 汤济广,胡望水,郭齐军,黄泽光,翟常博.东秦岭-大别造山带北侧中新生代差异构造变形[J].大地构造与成矿学,2012,36(2):176-185. |
| 作者姓名： | 汤济广 胡望水 郭齐军 黄泽光 翟常博 |
| 作者单位： | 1. 长江大学地球科学学院,湖北荆州434023;长江大学油气资源与勘探技术教育部重点实验室,湖北荆州434023 2. 中国石油化工股份有限公司,北京,100728 3. 中国石化勘探开发研究院无锡实验地质研究所,江苏无锡,214151 |
| 基金项目： | 全国油气资源战略选区调查与评价项目 |
| 摘 要： | 受多期非均衡造山作用以及多构造体制的叠加,东秦岭-大别造山带北侧中新生代发生差异构造变形.基于区域构造动力学机制,将中新生代构造变形分为4个期次:印支期(T2-T3)、早燕山期(J1)、中燕山期(J2-K1)和晚燕山-早喜马拉雅期(K2-E).通过野外地质剖面和地震剖面的构造解析,认为印支期-中燕山期主体变形方式为逆冲... |
| 关 键 词： | 中新生代 构造变形 逆冲推覆 伸展构造 东秦岭-大别造山带 |
Meso-Cenozoic Differential Tectonic Deformation in the Northern East Qinling-Dabie Orogenic Belt |
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| TANG Jiguang , HU Wangshui , GUO Jijun , HUANG Zeguang , ZHAI Changbo.Meso-Cenozoic Differential Tectonic Deformation in the Northern East Qinling-Dabie Orogenic Belt[J].Geotectonica et Metallogenia,2012,36(2):176-185. | |
| Authors: | TANG Jiguang HU Wangshui GUO Jijun HUANG Zeguang ZHAI Changbo |
| Institution: | 1.College of Geosciences, Yangtze University, Jingzhou 434023, Hubei, China; 2.MOE Key Laboratory of Oil & Gas Resources and Exploration Technology, Yangtze University, Jingzhou 434023, Hubei, China; 3.SINOPEC, Beijing 100728, China; 4. Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi 214151, Jiangsu, China) |
| Abstract: | Because of the multiphasic unbalanced orogeny and superimpose of multiple tectonic system,there is Meso-Cenozoic differential deformation in the northern East Qinling-Dabie orogenic belt. Based on the difference in geodynamic mechanism, the Meso-Cenozoic tectonic deformation in the northern East Qinling-Dabie Orogenic Belt could be divided into four epochs including Indosinian (T2-T3), Early Yanshanian (J1), Middle Yanshanian (J2-K1), Late Yanshanian -Early Himalayaian (K2-E). Structural analysis of two petrofabric sections and three seismic ones show that the tectonic deformation mode was thrusting from Indosinian to Middle Yanshanian, and the deformation strength had a feature of space-time migration from east to west. Late Yanshanian-Early Himalayaian was the key tectonic transform epoch in which the deformation was extensional,and the strongest extensional deformation happened in Xinyang-Hefei basin and the area along the Lingbao-Lushan-Queshan-Gushi-Feidong fault. And in order to understand the deformation strength from space-time, three balance cross-section were finished. The data display that Indosinian and Middle Yanshanian are the major epochs of thrusting in the northern East Qinling-Dabie orogenic belt. The intense thrusting lied in the east of the Shangcheng-Huangchuan area in Indosinian, and west in Middle Yanshanian. Because of the varying orogeny, the tectonic deformation was differential from the east to west of the study region in late Middle Yanshanian(K1). The deformation was thrusting in the northern East Qinling orogenic belt, and slumped overthrusting in the northern Dabie owing to thermal doming. |
| Keywords: | Meso-Cenozoic tectonic deformation overthrust tectonic extensional structure East Qinling-Dabie orogenic belt |
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