金沙江巧家段河谷黄土状堆积的时代问题

收稿日期: 1999-09-03

刊出日期: 1999-08-28

ON THE AGE OF LOESSAL SEDIMENT AROUND QIAOJIA IN THE JINSHAJIANG RIVER VALLEY

Received Date: 03 September 1999

Publish Date: 28 August 1999

摘要: 金沙江巧家段河谷广泛发育厚层黄土状堆积,尤以金沙江左岸宁南县华弹一带最为发育。其厚度较大而层理又不明显,且多钙质结核,通过对七条黄土状堆积的地层剖面作磁性地层研究和热释光测年,确定该黄土状堆积的时代属布容正向极性时晚期,其地质时代为晚更新世-全新世。
- 黄土状堆积 /
- 地层时代 /
- 金沙江
Abstract: There is a wide distribution of thick loessal sediment around Qiaojia in the Jinshajiang River valley, especially near the Huatan area, Ningnan county, Sichuan province on the left bank.The sediment is very thick, rich in calcareous concretions, and with no clear bedding.A detailed magnetostratigraphic study combined with thermoluminescence dating of seven sections of the sediment shows that it was deposited during the late Brunhes normal epoch, and has a geologic age of Late Pleistocene to Holocene.
- loessal sediment /
- stratigraphic age /
- Jinshajiang Riever valley