The age of the Nantuo Formation and Nantuo glaciation in South China

被引：289

作者：

Zhang, Shihong ^{[1
]}

Jiang, Ganqing ^{[2
]}

Han, Yigui

机构：

[1] China Univ Geosci, Sch Earth Sci & Resources, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China

[2] Univ Nevada, Dept Geosci, Las Vegas, NV 89154 USA

来源：

TERRA NOVA | 2008年 / 20卷 / 04期

关键词：

D O I：

10.1111/j.1365-3121.2008.00819.x

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

A U-Pb sensitive high-resolution ion microprobe (SHRIMP) age of 654.5 +/- 3.8 Ma from an ash bed immediately below the Nantuo Formation in South China provides the lowest age constraint for the Nantuo glaciation, which has been correlated with the global 'Marinoan' glaciation. A U-Pb SHRIMP age of 636.3 +/- 4.9 Ma from a fallout tuff within the basal layer of the Nantuo Formation, along with the existing age of 635.2 +/- 0.6 Ma from its overlying Doushantuo cap carbonate, suggests that the traditionally defined Nantuo Formation may have been deposited in a short time period at the end of the Nantuo glaciation. In combination with available ages globally, the data support a relatively short duration and rapid termination of 'Marinoan' glaciations.

引用

页码：289 / 294

页数：6

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