Lead isotopic systematics of Urals massive sulphide deposits

被引：2

作者：

Orgeval, Jean-Jacques ^{[1
]}

Guerrot, Catherine ^{[1
]}

Tessalina, Svetlana G. ^{[1
]}

Bourdon, Bernard ^{[1
]}

Zaykov, Victor ^{[1
]}

Buley, Claudia ^{[1
]}

Bushmann, Berndt ^{[1
]}

Herrington, Richard ^{[1
]}

Taylor, Rex ^{[1
]}

机构：

[1] Bur Rech Geol & Minieres, F-45060 Orleans, France

来源：

MINERAL DEPOSIT RESEARCH: MEETING THE GLOBAL CHALLENGE, VOLS 1 AND 2 | 2005年

关键词：

lead isotopes; Urals; massive sulphide deposits;

D O I：

10.1007/3-540-27946-6_170

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

The isotopic composition of lead from a total of 53 samples of galena from 18 VHMS deposits shows a range between 17.437 and 18.111 for Pb-206/Pb-204; 15.484 and 15.630 for Pb-207/Pb-204 and 37.201 - 38.027 for Pb-208/204. The results show a systematic trend with the leads of the Sibay, Barsuchiy Log and Djusa deposits being most radiogenic by comparison with those of Bakr-Tau and Oktiabrskoe which are the least radiogenic deposits. The Bakr-Tau and Oktiabrskoe deposits occur within most primitive fore-arc rocks at the lower part of the Baymak-Buribay formation, which contain lavas of boninitic affinity. The Sibay, Barsuchiy Log and Djusa deposits are found in intra- and back-arc setting and are hosted by a sequence of bimodal tholeiites. The deposits in "arc" settings such as the Balta-Tau, Gai and Alexandrinka deposits occupy an intermediate position. This trend is explained in term of mixing between mantle wedge and continental blocks.

引用

页码：667 / 670

页数：4

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