| 对横断山区地槽多旋回发展的初步认识 |
| 点此下载全文 |
| 引用本文：陈炳蔚,艾长兴.1984.对横断山区地槽多旋回发展的初步认识[J].地球学报,6(2):99-108. |
| DOI： |
| 摘要点击次数: 2523 |
| 全文下载次数: 2309 |
|
|
| 中文摘要:<正> 自黄汲清教授于1945年首次提出地槽褶皱系的多旋回发展概念以来,得到了国内外地质工作者的广泛引用。他指出我国多数地槽褶皱系都具有多旋回发展的特点。经过对天山、祁连山、秦岭等地槽褶皱系的深入研究、对比之后,初步建立了多旋回发展的模式。现以横断山区地槽为例来讨论该褶皱带中的多旋回发展特点。 横断山区位于青、藏、川、滇四省、区交接地带,其地质构造位置,正处在特提斯—喜马拉雅构造域东段拐弯部位,恰是欧亚板块与印度板块的拼合地带。根据作者在“三江地质志”构造组最近总结的资料,可把横断山区的构造单元划分如下(图1): |
| |
| A PRELIMINARY UNDERSTANDING OF PO- LYCYCLE OF GEOSYNCLINE IN HENGDUAN MOUNTAINS |
|
|
| Abstract:Here are presented some observations on geotectonicpolycyclic development in the Hengduan Mountains. Five focal points are included: (1) division of geotectonic cycles) (2) deep fracture and subduction zones, (3)evolution of Tethys Ocean; (4) tectonic history and (5) characteristics of poly-cyclic development. The important significance of Variscian and Indosinian cycles in Tethys evolution is emphasized.There are three major stages of tectonic development in the Hengduan Mountains. (1) Paleozoic-Prepaleozoic geosyncline-platform stage-closing stage of geosyncline (Early cycles), (2) stage of Tethys evolution-disintergration of continental crust, the spreading of oceanic crust and subduction (Principal cycles) and (3) stage of intensive northward compression and formation of Qinghai-Tibet plateau (Post cycles). Consequently, this area is of typical polycyclic development, including submarine volcanism, flysch formation, folding, granite intrusion, molasse formation, ophiolitic suites, spreading of oceanic crust subduction and resultant "trench-arc-basin" structures. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
|
|
