Mo and Mo Stable Isotope Geochemistry: Isotope System, Analytical Technique and Applications to Geology
详细信息
- 责任者：Xu Lingang (Technical University of Clausthal ; 38678 Clausthal-Zellerfeld ; Germany) ; Lehmann B.
- 刊名：Mineral Deposits
- 出版年：2011
- 卷期：30(1)
- 关键词：钼 ; molybdenum ; 钼同位素 ; molybdenum isotopes
- 页码：p.103-124
- 图表：13 illus., 1 table, 91 refs.
- 分类号：0600
- issnNo：ISSN0258-7106
- isbnNo：CN11-1965/P
摘要
Recently a number of transitional metal isotope systems have been investigated thanks to the advent of multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS). For example, the analytical uncertainty for Mo isotope measurement is less than ±0.1‰ (2σ) using the element double spike method to calibrate mass fractionation during Mo purification and mass spectrometric analysis. Natural materials have maximum～3‰ δ98/95Mo fractionation, which is related to redox processes. Under oxic conditions Mo coexists with Mn-oxyhydroxides as the stable oxyanion molybdate (MoO2-4), resulting in Mo-enriched Mn-Fe sediments characterized by light δ98/95Mo values. In contrast, in reducing H2S-rich environments, Mo is efficiently removed from seawater. The authors provide an overview of the current state, including a review of the Mo geochemistry and its isotopic behavior, analytical technique, fractionation mechanism, natural reservoirs, and applications both as redox proxy and indicator of ore genesis.
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