1.2 Ga Mafic dyke near York, southwestern Yilgarn Craton, Western Australia

被引：0
|
作者：
Pidgeon, RT [1 ]
Nemchin, AA
机构：
[1] Curtin Univ Technol, Sch Appl Geol, Perth, WA 6845, Australia
[2] Curtin Univ Technol, Sch Appl Geol, Tecton Special Res Ctr, Perth, WA 6845, Australia
来源：
AUSTRALIAN JOURNAL OF EARTH SCIENCES | 2001年 / 48卷 / 05期
关键词：
dykes; mesoproterozoic; SHRIMP; Yilgarn Craton; zircon;
D O I：
暂无
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
A SHRIMP (207)Pb/(206)Pb zircon age of 1204+/-10 Ma is reported for an east-west-trending dolerite dyke from near York in the southwestern Yilgarn Craton, This age is identical within analytical uncertainty to previously reported ages of ca 1210 Ma for dykes from the central Wheatbelt and the Western and Eastern Goldfields. The consistency of the dyke ages and the wide areal extent of the dykes suggests that emplacement occurred as a single magmatic pulse at cc 12 10 Ma throughout the southwestern Yilgarn Craton. The similarities between the age of the dykes and the ages of late events in the Albany-Fraser Orogeny, and the approximate parallelism of the east-west-trending dykes to the margin of the orogen, raises the possibility that these events are related.
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页码：751 / 755
页数：5
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