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Book Chapter

Geology and Gold Exploration in the Nansatsu District, Southern Kyushu, Japan

By
Toshihiko Hayashi
Toshihiko Hayashi
Metal Mining Agency of Japan, Tokiwa Bldg, 1-24-14, Toranomon, Minato-ku, Tokyo 105-0001, Japan
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Published:
January 01, 2001

Abstract

There are three main gold deposits, Kasuga, Iwato, and Akeshi, in the Nansatsu district of southern Kyushu, Japan (Fig. 1). These three deposits have similar geologic characteristics and are the type deposits for the so-called Nansatsu- style of mineralization (Urashima, 1975), more commonly referred to these days as high-sulfidation epithermal Au mineralization (Hedenquist, 1987). This style of mineralization is believed to be a product of high-temperature acid fluids genetically related to magmatic activity at shallow depths (Matsuhisa et al., 1991; Hedenquist et al., 1994). More than 27 tons (t) of gold have been produced from these three deposits. The ore from these deposits, which is hosted by highly silicified rock, is sold to copper smelters in Japan as flux.

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Contents

Society of Economic Geologists Guidebook Series

Epithermal Gold Mineralization and Modern Analogues, Kyushu, Japan

Craig A. Feebrey
Craig A. Feebrey
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Toshihiko Hayashi
Toshihiko Hayashi
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Sachihiro Taguchi
Sachihiro Taguchi
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Society of Economic Geologists
Volume
34
ISBN electronic:
9781934969878
Publication date:
January 01, 2001

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