Re-Os Ages for Ag-Bearing Cu Sulphide Ores from the Kupferschiefer in Poland

被引：0

作者：

Mikulski, Stanislaw Z. ^{[1
]}

Stein, Holly J. ^{[2
,3
]}

机构：

[1] Natl Res Inst, Polish Geol Inst, 4 Rakowiecka St, PL-00975 Warsaw, Poland

[2] Colorado State Univ, AIRIE Program, Ft Collins, CO 80523 USA

[3] Univ Oslo, CEED, N-0316 Oslo, Norway

来源：

MINERAL RESOURCES IN A SUSTAINABLE WORLD, VOLS 1-5 | 2015年

关键词：

Kupferschiefer; Re-Os dating; bornite; chalcopyrite; SIEROSZOWICE MINING DISTRICT; POLISH ZECHSTEIN BASIN; K-AR AGES; CLAY MINERALOGY; GOLD DEPOSIT; MINERALIZATION; CRYSTALLINITY; ILLITES; ORIGIN; MINE;

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：

We report a Re-Os isochron age for bornite veinlets with chalcopyrite +/- chalcocite margins that are parallel to sub-parallel to bedding in carbonaceous Kupferschiefer black shale from the underground workings of the Lubin and Polkowice mines in SW Poland. A Model 1 regression on four different samples yields 212 +/- 7 Ma, with an initial Os-187/Os-188 ratio of 2.13 +/- 0.31 (MSWD = 1.3). The analysed Cu-sulphides have Re concentrations ranging from 5 to 12 ppb, and total Os concentrations ranging from 26 to 52 ppt. Significant common Os is present in all of the analysed samples. The origin of the Kupferschiefer mineralization is commonly attributed to multiple flow events of low temperature oxidizing metalliferous fluids from basinal sediments and trapped by the geochemical barrier of carbonaceous black shale rich in organic carbon. Our results strongly suggest that within the world-class mining area in Poland the main economic Ag-bearing Cu sulphide mineralization event took place in the Late Triassic (Norian), ca. 212 +/- 7 Ma.

引用

页码：607 / 610

页数：4

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