| 秦岭——大别造山带与江南造山带的差异隆升过程:来自江汉盆地中新生代沉积记录的证据 |
| |
| 引用本文： | 徐政语,卢文忠,林舸,刘池阳,王岳军,郭锋.秦岭——大别造山带与江南造山带的差异隆升过程:来自江汉盆地中新生代沉积记录的证据[J].地质科学,2005,40(2):179-197. |
| |
| 作者姓名： | 徐政语 卢文忠 林舸 刘池阳 王岳军 郭锋 |
| |
| 作者单位： | 1. 中国石油天然气股份有限公司勘探开发研究院杭州石油地质研究所 杭州 310023;
2. 中国科学院广州地球化学研究所 广州 510640;
3. 西北大学地质学系 西安 710069 |
| |
| 基金项目： | 中国科学院知识创新工程项目 |
| |
| 摘 要： | 江汉叠合盆地地处扬子地区中部,夹持于秦岭--大别造山带与江南造山带中段之间,是中生代中期以来在扬子浅海台地基础上发育起来的典型海陆交互相-陆相叠合盆地,其中充填了厚逾10000m的中三叠世-新近纪陆源碎屑岩系。据印支期以来的造山活动历程与成盆演化特点,将盆山耦合过程划分为造山前期、主造山期、造山后期与非造山期4个阶段,将盆地充填层序划分为陆架边缘、前陆、断陷和坳陷4个(盆地世代)超层序。依据盆内沉积物碎屑组份分析,发现中三叠世江南造山带进入强造山活动期,白垩纪末进入造山带坍塌后的活动平静期;秦岭--大别造山带的主造山活动阶段为晚三叠-早侏罗世,古近纪末处于非造山活动相对平静阶段。盆区整体呈现东部造山活动早,山带隆升早,持续时间长,剥露地层较快较早进入变质岩层段;西部造山活动时间晚,隆升时间相对较晚,剥露地层在早侏罗世初期才依次切入变质岩层段;盆地南、北缘山带总体呈现多幕式差异隆升过程。
|
| 关 键 词： | 江汉叠合盆地 沉积记录 秦岭--大别造山带 江南造山带 中-新生代 |
| 文章编号： | 0563-5020(2005)02-0179-19 |
| 收稿时间： | 2003-05-26 |
| 修稿时间： | 2003年5月26日 |
DISCREPANT UPLIFTING PROCESSES OF THE QINLING-DABIE AND JIANGNAN OROGENS:EVIDENCE FROM MESO-CENOZOIC SEDIMENTARY RECORDS IN THE JIANGHAN SUPERIMPOSED BASIN |
| |
| Xu Zhengyu,Lu Wenzhong,Lin Ge,Liu Chiyang,Wang Yuejun,Guo Feng.DISCREPANT UPLIFTING PROCESSES OF THE QINLING-DABIE AND JIANGNAN OROGENS:EVIDENCE FROM MESO-CENOZOIC SEDIMENTARY RECORDS IN THE JIANGHAN SUPERIMPOSED BASIN[J].Chinese Journal of Geology,2005,40(2):179-197. |
| |
| Authors: | Xu Zhengyu Lu Wenzhong Lin Ge Liu Chiyang Wang Yuejun Guo Feng |
| |
| Institution: | 1. Hangzhou Institute of Petroleum Geology, China National Petroleum Corp., Hangzhou 310023;
2. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510650;
3. Department of Geology, Northwest Universty, Xi’an 710069 |
| |
| Abstract: | The Jianghan basin in the Middle Yangtze area, sandwiched in between the Qinling-Dabie and Jiangnan orogens, was a typical superimposed basin. It developed on the Middle Triassic shallow marine platform and transited from alternating marine-continent facies to continent basin, with the deposits of Triassic to Neogene thickened than 10 000 m. The developing process of the basin, coupled with orogenic processes of the Qinling-Dabie and Jiangnan orogens, could be divided into four phases, namely, the initial orogenic, the main orogenic, the post orogenic and extensional (non-orogenic) periods. The stratigraphical sequences of the fillings in the basin were marked by four supper-sequences (or four basin generations), namely, the continental shelf margin, foreland, rift and depression basins. By analyse distribution of the sedimentary detritals in the basin, it was discovered that the Jiangnan orogen entered a strong activation stage during Middle Triassic, and a quiet stage of post-orogenic collapse in the end of Cretaceous; and the main orogeny occurred, in the Qinling-Dabie orogenic area, during Late Triassic and early Early Jurassic, with a relatively quiet stage during Paleogene. The basin developing showed a tendency that the orogeny and uplifting were earlier in the east part, correspondingly, the uplifting and erosion continued a longer time so the metamorphic basement rocks outcropped in Late Triassic; while in the west part of the basin, the orogeny and uplifting were relatively later, and the metamorphic rocks outcropped in Early Jurassic. The mountain chains to the nonrth and the south of the Jianghan superimposed basin had undergone obviously discrepant uplifting processes. |
| |
| Keywords: | The Jianghan superimposed basin Sedimentary records The Qinling-Dabie orogen The Jiangnan orogen Meso-Cenozoic |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《地质科学》浏览原始摘要信息 |
| 点击此处可从《地质科学》下载免费的PDF全文 |
|
