A Re-Os study of noble metal-rich black shales from the Polish Kupferschiefer

被引：0
作者：
Pasava, J. [1 ]
Vymazalova, A. [1 ]
Mao, J.
Du, A.
Qu, W.
Korzekwa, W.
机构：
[1] Czech Geol Survey, Prague 11821 1, Czech Republic
来源：
DIGGING DEEPER, VOLS 1 AND 2: DIGGING DEEPER | 2007年
关键词：
black shales; Kupferschiefer; Poland; Re-Os isotopes; platinum-group elements;
D O I：
暂无
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
Six samples of Permian noble metal-rich black shales from the Polkowice mine were analyzed for Re-Os isotopes, noble metals, and selected major and trace elements. Negative correlations between common Re and Os and common Os and C-org. indicate that noble metal-rich black shales have not remained in a closed system, especially with respect to Os. The Os-187/Os-188 vs Re-187/Os-188 plot defines an errorchron with an age of 279 +/- 14 Ma (MSWD = 8). The initial Os-187/Os-188 ratio of 1.17 +/- 0.28 (if not altered) is within the variation range of present-day seawater, and excludes any significant contribution from mantle or meteoritic PGE sources.
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页码：221 / 224
页数：4
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