Platinum-rhenium-osmium isotope systematics of chromitite and native osmium from the Guli Massif (Maimecha-Kotui Province, Russia)
- 作者: Malitch K.1, Puchtel I.2, Kogarko L.3, Badanina I.1
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隶属关系:
- Zavaritsky Institute of Geology and Geochemistry, Ural Branch of the Russian Academy of Sciences
- University of Maryland
- Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences
- 期: 卷 515, 编号 1 (2024)
- 页面: 45-50
- 栏目: GEOLOGY OF ORE DEPOSITS
- URL: https://journals.rcsi.science/2686-7397/article/view/265086
- DOI: https://doi.org/10.31857/S2686739724030062
- ID: 265086
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详细
To gain insight into the source of ore material, this study presents the first Re-Os and Pt-Os isotopic and highly siderophile element (HSE) abundance data for chromitite and osmium minerals from the Guli massif of ultramafic, alkaline rocks and carbonatites located in the Maimecha-Kotui province, Polar Siberia. The study utilized a number of analytical techniques, including electron microprobe analysis, negative thermal ionization mass spectrometry (N-TIMS) and high pressure asher digestion and an isotope dilution-inductively coupled plasma-mass spectrometry. The HSE concentrations in chromitite samples range from 191 to 866 ppb with a predominance of Ir-group platinum-group elements (PGE) (Os, Ir and Ru) over Pt-group PGE (Rh, Pt and Pd) and Re, which is consistent with their platinum-group mineral control (i. e., Os-Ir alloys and laurite, RuS2) within the chromitite. The Re-Os and Pt-Os isotope data indicate that the HSE budget of the chromitite and osmium minerals from the Guli massif was largely controlled by that of the mantle source, which evolved with long-term near-chondritic Re/Os and Pt/Os ratios; this source is within the range of those for the majority of komatiite and abyssal peridotite sources.
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作者简介
K. Malitch
Zavaritsky Institute of Geology and Geochemistry, Ural Branch of the Russian Academy of Sciences
编辑信件的主要联系方式.
Email: dunite@yandex.ru
俄罗斯联邦, Ekaterinburg
I. Puchtel
University of Maryland
Email: ipuchtel@umd.edu
美国, College Park, MD20742
L. Kogarko
Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences
Email: kogarko@geokhi.ru
Academician of the RAS
俄罗斯联邦, MoscowI. Badanina
Zavaritsky Institute of Geology and Geochemistry, Ural Branch of the Russian Academy of Sciences
Email: dunite@yandex.ru
俄罗斯联邦, Ekaterinburg
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