Abstract:The Western Hunan-Eastern Guizhou mercury ore belt has long been considered to be represented by the Wanshan type. Nevertheless, another sort of orebodies bearing obviously different characteristics from the Wanshan type has been recognized in practical work, which is called “Chatian type” by the author. Controlled by the NWW-trending folded structure, the Wanshan type orebodies occur gently in groups or clusters, consistent with the host rocks in attitude. There exist equidistant intervals between ore beds. The altered cores are dominated by silicification (microquartzite), and the most typical ores are cinnabar layers-banded quartz veins. In contrast, the Chatian type orebodies are governed by NWW- and NNE- trending intraformational sharply declined fractures and occur as steep veins perpendioular to or oblique to the bedding of host rocks. Vein bodies, usually of small sizes, show remarkable variation and poor continuity. The altered cores are dominated by brecciated dolomitization. In the orebodies, sphalerite is closely associated with cinnabar. Therefore, though having some similarities, the Wanshan type oredodies and the Chatian type ones show evident differences from each other.
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包正相.1985.湘西黔东汞矿带两类不同矿体的产状特征[J].矿床地质,4(4):81~88.1985.Mode of occurrence of two different types of orebodies in the western Hunan-eastern Guizhou mercury ore belt[J].Mineral Deposits4(4):81~88
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