Re-Os systematics in chromite deposits from the Bulgarian Rhodopes: preliminary results

被引：0
|
作者：
Gonzalez-Jimenez, Jose Maria [1 ]
Griffin, William L. [1 ]
Kerestedjian, Thomas
Gervilla, Fernando
O'Reilly, Suzanne Y. [1 ]
Proenza, Joaquin A.
Pearson, Norman J. [1 ]
机构：
[1] Macquarie Univ, Dept Earth & Planetary Sci, GEMOC ARC Natl Key Ctr, Sydney, NSW 2129, Australia
来源：
LET'S TALK ORE DEPOSITS, VOLS I AND II | 2011年
关键词：
Re-Os isotopes; chromite deposits; platinum-group minerals; Bulgarian Rhodopes; Dobromirtsi; PLATINUM-GROUP; PODIFORM CHROMITITES;
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：
Using laser-ablation MC-ICPMS we have measured Re-Os isotopes in platinum-group minerals from chromitites of the Dobromirtsi ultramatic massif, Central Rhodopes, Bulgaria. The results show large variations in Os-isotopes ratios reflecting both magmatic and post-magmatic processes. Primary Os-isotope signatures indicate a melt depletion event ca. 415 Ma ago which is consistent with the accepted age of the Hercynian orogeny in the area. These signatures were disturbed during metamorphism by incorporation of Os and Re, resulting in both future and older model ages.
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页码：601 / 603
页数：3
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