Zinc-rich pyrite from the TAG active mound, the TAG hydrotherma field, Mid-Atlantic Ridge

Su Young Lee, Masatsugu Ohnishi, Yasuhiro Shibata, Makoto Wwatanabe, Kenichi Hoshino, Mayumi Jige, Xiangping Gu, Hitoshi Chiba, Tamotsu Oomori, Kantaro Fujioka, Peter A. Rona

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Pyrite rich in Zn, up to 3.1 wt%, was found in the TAG active mound of the TAG hydrothermal field, the slow-spreading Mid-Atlantic Ridge at 26°08′N and 44°49′W. The Zn-rich pyrite is characterized by an optical homogeneity, a homogeneous distribution of Zn in the back-scattered electron images, both at a magnification of about 500, a negative correlation between Fe and Zn contents of the pyrite and a rather small unit cell edge (a0 = 5.4117 ± 0.0008Å), strongly indicating that the detected Zn is present in the pyrite in solid solution. Such Zn concentrations are observed exclusively in dendritic pyrite, suggesting that the Zn-rich pyrite grew from hydrothermal fluids of a high degree of supersaturation due to quenching on the seafloor.

Original languageEnglish
Pages (from-to)63-68
Number of pages6
JournalResource Geology
Volume51
Issue number1
DOIs
Publication statusPublished - Mar 1 2001

Keywords

  • Dendritic growth texture
  • Mid-Atlantic Ridge
  • Solid solution
  • TAG active mound
  • TAG hydrothermal field
  • Zn-rich pyrite

ASJC Scopus subject areas

  • Geology
  • Geochemistry and Petrology

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    Lee, S. Y., Ohnishi, M., Shibata, Y., Wwatanabe, M., Hoshino, K., Jige, M., Gu, X., Chiba, H., Oomori, T., Fujioka, K., & Rona, P. A. (2001). Zinc-rich pyrite from the TAG active mound, the TAG hydrotherma field, Mid-Atlantic Ridge. Resource Geology, 51(1), 63-68. https://doi.org/10.1111/j.1751-3928.2001.tb00082.x