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粤西地区锡矿床分布于吴川—四会断褶带及其北西侧。与区内燕山晚期复式花岗岩类关系密切,斑岩型锡矿主要产于花岗岩岩筒内部及其接触带,蚀变与矿化具分带现象;云英岩型锡矿主要于花岗岩体顶部隆起部位面型云英岩化带中;层控矽卡岩型锡铁矿产于燕山晚期花岗岩外接触带震旦系云开群中段矽卡岩中,矿体呈似层状、透镜状产出,与地层产状基本一致。本文着重从锡矿类型及地质特征进行概述,并对其成矿条件作初步探讨。
The tin deposits in west Guangdong are distributed in the Wuchuan-Sihui fault fold belt and its northwest side. It is closely related to the Late Yanshanian compound granites in the area. Porphyry type tin deposits are mainly produced in the interior of granite barrels and their contact zones with alteration and mineralization with zonation. The Yunling-type tin deposits are mainly located at the top of granite The surface-controlled skarn-type tin-bearing iron ore is produced in skarn of the middle segment of the Yunkai Group in the Late Yanshanian granite outer contact zone. The ore bodies are layered and lenticular, Basically consistent with the formation of stratum. This article focuses on the overview of the type and geological features of tin deposits and makes a preliminary discussion of the metallogenic conditions.