Characteristics and mineralization age of the fukusen no. 1 vein, hishikari epithermal gold deposits, southern Kyushu, Japan

Yuki Tohma, Akira Imai, Kenzo Sanematsu, Kotaro Yonezu, Ryohei Takahashi, Masaaki Koyama, Ryota Sekine, Robert Duncan, Koichiro Watanabe

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The Fukusen No. 1 vein is located in the southeastern part of the Yamada deposit, Hishikari epithermal gold deposits, southern Kyushu, Japan. 40Ar/39Ar plateau ages of adularia from the margin and the center of the Fukusen vein are determined to be 0.617 ± 0.024-Ma and 0.606 ± 0.009-Ma, respectively. The Fukusen No. 1 vein shows banding structure composed mainly of quartz, adularia and clay minerals. Colloform texture is displayed by cryptocrystalline to amorphous silica material that is associated with fine-grained electrum and sulfides near the center of the vein. Pyrite in the Fukusen No. 1 vein often shows acicular shape resulting from inversion from marcasite. Near the center of the vein, primary marcasite occurs associated with colloform texture of silica. The Fukusen No.1 vein preserves primary texture and materials which were deposited from the ore-forming hydrothermal solution. The Fukusen No. 1 vein was formed in a short period and is one of the youngest veins in the Hishikari deposits.

Original languageEnglish
Pages (from-to)348-358
Number of pages11
JournalResource Geology
Volume60
Issue number4
DOIs
Publication statusPublished - Dec 2010

All Science Journal Classification (ASJC) codes

  • Geology
  • Geochemistry and Petrology

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