Kun Guo

Effects of Subduction Fluids and Fractional Crystallization on the Magnetic Minerals Formation in the Back‐Arc Basin

Zhaoxia Jiang, Xia Zhang, Sanzhong Li, Xiyao Li et autres

Abstract (Titano)magnetite is the major magnetic carrier in igneous rocks, whether it can decode the influence of subduction fluids and fractional crystallization characteristics in back‐arc basins is unclear. Here, we performed petrographic and magnetic analyses on volcanic samples from the Okinawa Trough, …

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Remelting of the Songpan-Ganze slab: Contribution to elevated magmatic oxygen fugacity and reactivation of copper in the Yulong porphyry copper deposits belt

Yue Xu, Quanshu Yan, Lei-Luo Xu, Kun Guo et autres

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Ridgeward flow of compositionally heterogeneous mantle produces near-ridge seamount chains in the South Pacific

Pengyuan Guo, Fangyu Shen, Dongyong Li, Yanghui Zhao et autres

Abstract Many near-ridge seamounts and seamount chains in the Pacific Ocean have a nonplume origin. Yet, their origin remains to be fully understood. Our new geochemical study on seamount basalts from the Pukapuka Ridge (PPR) finds a large along-ridge lava compositional variation …

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Supplemental Material: Arc magma heterogeneity induced by subslab mantle upwelling

Xiaohui Li, Kun Guo, Sanzhong Li, et al.

Sample information, methods, supplemental figures and tables.

Supplemental Material: Arc magma heterogeneity induced by subslab mantle upwelling

Xiaohui Li, Kun Guo, Sanzhong Li, et al.

Sample information, methods, supplemental figures and tables.

Elemental Compositions of Clinopyroxenes from Southern Okinawa Trough Basalt: Implications for Magmatism and Structural Environment in an Initial Back-Arc Basin

Kun Guo, Shikui Zhai, Di Fan, Xia Zhang et autres

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Molybdenum Isotopic Signatures of Forearc Serpentinites: Origin and Contribution to the Subduction Zone Mo Cycle

Xiaohui Li, Sanzhong Li, Shuo Chen, Jing‐Jing Fan et autres

Abstract Serpentinites, as important reservoirs for volatile and fluid‐mobile elements, have been increasingly recognized as playing a critical role in global geochemical cycles. However, direct evidence for their dominance in the molybdenum (Mo) cycle in subduction zones has been elusive. Here, we …

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Mantle plume plays an important role in modern seafloor hydrothermal mineralization system

Xia Zhang, Zhilei Sun, Nengyou Wu, Hong Cao et autres

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Tracing black shales in the source of a porphyry Mo deposit using molybdenum isotopes

Q. K. Xue, Lipeng Zhang, Shuo Chen, Kun Guo et autres

Abstract Porphyry Mo deposits are important suppliers of molybdenum for industrial applications, but the origin and source of metals in these deposits remain debated. Here, we present Mo isotope data for Miocene mineralized porphyritic monzogranites (MPMs) and Paleocene barren biotite monzogranites and …

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Precise determination of Sr and Nd isotopic compositions of Chinese Standard Reference samples GSR-1, GSR-2, GSR-3 and GBW07315 by TIMS

Kun Guo, Jimin Yu, Di Fan, Zhifang Hu et autres

In this contribution, the Sr and Nd isotopic compositions of four Chinese National Standards are investigated to verify whether they meet the requirements of international reference materials. Powdered samples were digested using conventional HF and HNO3 acid dissolution protocols, and chemical purification …

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Heavy Copper Isotopes in Arc‐Related Lavas From Cold Subduction Zones Uncover a Sub‐Arc Mantle Metasomatized by Serpentinite‐Derived Sulfate‐Rich Fluids

Zuxing Chen, Jiubin Chen, Landry Soh Tamehe, Yuxiang Zhang et autres

Abstract Serpentinite dehydration during subduction releases fluids into the sub‐arc mantle, yet the oxidizing capability of these fluids remains controversial. Here, redox‐sensitive Cu isotopes and in situ S isotopes of magmatic sulfides in fresh lavas from three subduction zones in the western …

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Polyphase hydrothermal sulfide mineralization in the minami–ensei hydrothermal field, middle okinawa trough: Implications from sulfide mineralogy and in situ geochemical composition of pyrite

Xia Zhang, Zhilei Sun, Nengyou Wu, Kun Guo et autres

The mineralogical and geochemical zonation of hydrothermal chimneys preserve important information on mineralization process and hydrothermal evolution. In this study, the sulfide mineralogy and in situ geochemical compositions of pyrite from a hydrothermal chimney in the Minami–Ensei (ME) hydrothermal field were analyzed …

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