A Rb-Sr whole rock isochron for the Stockdale Rhyolite of the English Lake District and a revised mid-Palaeozoic time-scale

被引：34

作者：

Gale, N.H. ^{[1
]}

Beckinsale, R.D. ^{[2
]}

Wadge, A.J. ^{[3
]}

机构：

[1] Department of Geology and Mineralogy, The University, Oxford

[2] Institute of Geological Sciences, London, WClX 8NG, 64, Grays Inn,Rd

[3] Institute of Geological Sciences, Leeds, U15 8TQ, Ring Road Halton

来源：

Journal of the Geological Society | 1979年 / 136卷 / 02期

关键词：

D O I：

10.1144/gsjgs.136.2.0235

中图分类号：

学科分类号：

摘要：

The extrusion of the Stockdale Rhyolite, an upper Ordovician lava lying within Zone 2 of the Cautleyan Stage of the Ashgill, is dated by the Rb-Sr whole rock isochron method at 421±3 Ma. This datum is more precise than any published Lower Palaeozoic age. Samples of the rhyolite from within the thermal aureole of the Shap Granite show Rb-Sr systematics apparently unaffectedb y baking. A revised mid-Palaeozoic time-scale is presented. © 1979 The Geological Society.

引用

页码：235 / 242

页数：7