Molybdenum isotope composition of the upper mantle and its origin: insight from mid-ocean ridge basalt

Shuo CHEN

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Molybdenum isotope composition of the upper mantle and its origin: insight from mid-ocean ridge basalt

Deep Sea | Updated：2024-10-14

- Molybdenum isotope composition of the upper mantle and its origin: insight from mid-ocean ridge basalt
- Molybdenum isotope composition of the upper mantle and its origin: insight from mid-ocean ridge basalt
- 海洋湖沼学报(英文) 2024年42卷第3期页码：705-708
- Affiliations：
  
  Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
- Author bio：
  
  shuochen@qdio.ac.cn
- Funds：
  
  the National Natural Science Foundation of China(42176087;42322605);the Laoshan Laboratory(LSKJ202204100);the Youth Innovation Promotion Association, Chinese Academy of Sciences(2021206)
- DOI：
  中图分类号：
- 收稿：2023-11-21，
  
  网络首发：2024-01-12，
  
  纸质出版：2024-05-01
- Accepted：
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Molybdenum isotope composition of the upper mantle and its origin: insight from mid-ocean ridge basalt[J]. 海洋湖沼学报(英文), 2024,42(3):705-708.

CHEN Shuo.Molybdenum isotope composition of the upper mantle and its origin: insight from mid-ocean ridge basalt[J].Journal of Oceanology and Limnology,2024,42(03):705-708.
Molybdenum isotope composition of the upper mantle and its origin: insight from mid-ocean ridge basalt[J]. 海洋湖沼学报(英文), 2024,42(3):705-708. DOI：

CHEN Shuo.Molybdenum isotope composition of the upper mantle and its origin: insight from mid-ocean ridge basalt[J].Journal of Oceanology and Limnology,2024,42(03):705-708. DOI：

摘要

Abstract

The molybdenum (Mo) isotope system is pivotal in reconstructing marine redox changes throughout Earth’s history and has emerged as a promising tracer for igneous and metamorphic processes. Understanding its composition and variation across major geochemical reservoirs is essential for its application in investigating high-temperature processes. However

there is debate regarding the δ

98/95

Mo value of the Earth’s mantle

with estimates ranging from sub-chondritic to super-chondritic values. Recent analyses of global mid-ocean ridge basalt (MORB) glasses revealed significant δ

98/95

Mo variations attributed to mantle heterogeneity

proposing a two-component mixing model to explain the observed variation. Complementary studies confirmed the sub-chondritic δ

98/95

Mo of the depleted upper mantle

suggesting remixing of subduction-modified oceanic crust as a plausible mechanism. These findings underscore the role of Mo isotopes as effective tracers for understanding dynamic processes associated with mantle-crustal recycling.

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references

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