| 川西义敦地区三叠纪序地层研究新认识 |
| |
| 引用本文： | 黄仕华.川西义敦地区三叠纪序地层研究新认识[J].沉积与特提斯地质,2000,20(2):68-73. |
| |
| 作者姓名： | 黄仕华 |
| |
| 作者单位： | 四川省地勘局区调队,四川双流 |
| |
| 摘 要： | 义敦地区处于活动岛弧带，１：５万区调将原图姆沟组自下而上分解为党恩组、列衣组、曲嘎寺组和勉戈组。以曲嘎寺组底部的Ｉ型不整合面及勉戈组底部的ＩＩ型不整合面为基准，结合内部沉积组合特征，尝试划分出３套三级层序地层，即下部层序（未见底）、中部Ｉ型碳酸盐层序和上部ＩＩ型层序（包括喇嘛垭组），在这些层序内各体系域发育齐全，特征明显。
|
| 关 键 词： | 活动岛弧带 三级层序 三叠纪 层序地层 |
| 收稿时间： | 1999/3/18 0:00:00 |
Triassic sequence stratigraphy in the Yidun region, western Sichuan |
| |
| HUANG Shi-hua.Triassic sequence stratigraphy in the Yidun region, western Sichuan[J].Sedimentary Geology and Tethyan Geology,2000,20(2):68-73. |
| |
| Authors: | HUANG Shi-hua |
| |
| Institution: | Regional Geological Surveying Party, Sichuan Bureau of Geology and Mineral Resources, Shuangliu 610213, Sichuan, China |
| |
| Abstract: | The Yidun region,western Sichuan is located in an active island-arc zone where the Upper Triassic strata are well developed. According to the regional geological map on the scale of 1:50000, the formerly Tumugou Formation may be redivided, from the base upwards, into the Dang'en, Lieyi, Qugasi and Miange Formations. With the aid of the type 1 unconformity at the base of the Qugasi Formation and the type 2 unconformity at the base of the Miange Formation, three third-order sequences have been tentatively identified, including the lower sequence (not penetrated),middle type 1 sequence and upper type 2 sequence (including the Lamaya Formation). All of the depositional systems tracts are also recognized in these sequences. |
| |
| Keywords: | active island-arc zone type 1 unconformity type 2 unconformity thirdo rder sequence |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《沉积与特提斯地质》浏览原始摘要信息 |
| 点击此处可从《沉积与特提斯地质》下载免费的PDF全文 |
|
