| The Early Precambrian Rocks,Their Ages,Division and Correlation of the Taihang-Wutai Region, the Yanshan Region and the Eastern Sector of the Yinshan Mountains |
| |
| 摘 要： | According to differences of the protolith formations, the early Precambrian strata in the northern part ofthe North China platform may be divided into the stable stratigraphic region in the west and the mobilestratigraphic region in the east. Based on unconformities, either stratiragphic or tectonic, as well as significantmetamorphic thermal events, the two regions may be stratigraphically defined as follows: 1) the middleArchaean Fuping Supergroup composed of the Chenzhuang and Wanzi Groups (stable areas), and the middleArchaean Qianxi Group (mobile area), whose upper limits are all dated at 2800 Ma; and 2) the upper ArchaeanWutai Supergroup composed of the Longquanguan, Shizui and Taihuai Groups (stable areas), and the upperArchaean Zunhua, Dantazi and Zhuzhangzi Groups (mobile areas). whose upper limits are all dated at 2500Ma. A correlation of the above-mentioned units is also made. The lower Proterozoic Hutuo Group of the sta-ble region is adjusted to comprise the Gaofan, Doucun, Dongye and Guojiazhai Groups. The upper limit of theGaofan Group is placed at 2350 Ma, Dongye 1850 Ma and Guojiazhai (the lower limit of the Changcheng Sys-tem) 1700 Ma.
|
The Early Precambrian Rocks,Their Ages,Division and Correlation of the Taihang-Wutai Region,the Yanshan Region and the Eastern Sector of the Yinshan Mountains |
| |
| Authors: | Wang Qichao |
| |
| Abstract: | Abstract According to differences of the protolith formations, the early Precambrian strata in the northern part of the North China platform may be divided into the stable stratigraphic region in the west and the mobile stratigraphic region in the east. Based on unconformities, either stratiragphic or tectonic, as well as significant metamorphic thermal events, the two regions may be stratigraphically defined as follows: 1) the middle Archaean Fuping Supergroup composed of the Chenzhuang and Wanzi Groups (stable areas), and the middle Archaean Qianxi Group (mobile area), whose upper limits are all dated at 2800 Ma; and 2) the upper Archaean Wutai Supergroup composed of the Longquanguan, Shizui and Taihuai Groups (stable areas), and the upper Archaean Zunhua, Dantazi and Zhuzhangzi Groups (mobile areas), whose upper limits are all dated at 2500 Ma. A correlation of the above-mentioned units is also made. The lower Proterozoic Hutuo Group of the stable region is adjusted to comprise the Gaofan, Doucun, Dongye and Guojiazhai Groups. The upper limit of the Gaofan Group is placed at 2350 Ma, Dongye 1850 Ma and Guojiazhai (the lower limit of the Changcheng System) 1700 Ma. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《Acta Geologica Sinica》浏览原始摘要信息 |
| 点击此处可从《Acta Geologica Sinica》下载免费的PDF全文 |
|
