Unique character of the host rocks for the Mau Due stibnite deposits, northernmost Vietnam

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  • ISHIHARA Shunso
    Geological Survey of Japan, AIST Central 7, Tsukuba 305-8567, Japan
  • ISHIYAMA Daizo
    Graduate School of Engineering and Resource Science, Akita University
  • NGOC Can Pham
    Graduate School of Engineering and Resource Science, Akita University

Bibliographic Information

Other Title
  • ベトナム最北部，Mau Due 輝安鉱 鉱床における母岩の化学的特異性について
  • ベトナム サイホクブ,Mau Dueキアンコウコウショウ ニ オケル ボガン ノ カガクテキ トクイセイ ニ ツイテ

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Description

The Mau Due stibnite deposits are of fracture-filling type occurring in Devonian slates at the northernmost Vietnam. The host rocks are unusually C-bearing and dolomite-rich slates. The rocks are also high in chalcophile elements. Compared with the Japanese standard black slate of the Paleozoic Toyoma Group, the Devonian slates are enriched in the following chalcophile element: Cd (x 64), Au (x 27), Ag (x 21), Sb (x 19), Mo (x 6.1), Zn (x 4.6), Ni (x 3.4), As (x 3.1), and lithophile elements of W ( x 5.3) and Cr (x 3.4). The ore components concentrated in the Mau Due deposits may have been originated in the host rocks at deep levels and concentrated in the circulating meteoric water, then to the mineralized fractures; yet we need further detailed studies to prove this hypothesis.

Journal

  • Shigen-Chishitsu

    Shigen-Chishitsu 64 (1), 19-23, 2014

    The Society of Resource Geology

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