GEOCHRONOLOGIC AND ISOTOPIC EVIDENCE FOR EARLY PROTEROZOIC CRUST IN THE EASTERN ARABIAN SHIELD

被引：2

作者：

STACEY, JS ^{[1
]}

HEDGE, CE ^{[1
]}

机构：

[1] US GEOL SURVEY MISSION, JEDDAH, SAUDI ARABIA

来源：

GEOLOGY | 1984年 / 12卷 / 05期

关键词：

Isotopes - Neodymium alloys - Samarium alloys - Binary alloys - Rubidium alloys - Zircon - Uranium alloys - Strontium alloys - Lead alloys;

D O I：

10.1130/0091-7613(1984)12<310:GAIEFE>2.0.CO;2

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

Reports zircon U-Pb, feldspar common Pb, whole-rock Sm-Nd, and Rb-Sr data from sample Z-103, a fine-grained granodiorite from the Jabal Khida region of the Saudi Arabian Shield (lat. 21o19'N; long. 44o50'W). The measurements yield conclusive evidence for continental crust of early Proterozoic age (approx 1630Ma) at that locality. Furthermore, lead-isotope data indicate an even earlier, perhaps Archean, crustal history for the source of the lower Proterozoic rocks.-Authors

引用

页码：310 / 313

页数：4

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