辽宁义县红石火山岩型金矿床地质特征及其找矿意义

红石金矿是新发现的火山岩型金矿床.辽宁省地质矿产局第四地质大队做了初步详查.在前人工作的基础上,本文概述了矿床地质特征,分析了矿床成因,提出了找矿标志.燕辽地区火山岩分布广泛,找寻该类型矿床有其重要现实意义.

HONGSHI GOLD DEPOSIT IN YIXIAN COUNTY, LIAONING PROVINCE-ITS' GEOLOGICAL FEATURES AND SIGNIFICANCE TO Au-EXPLORATION

This gold depoosit is a volcanic gold deposit discovered in recent years. It is situated at the east end of Yah-liao folding belt and in the southern part of the Yixian county structural basin of Mesozoic. Ore bodies are strictly controled by rhyolitic porphyry and the fractured-altered zone. Au and Ag are mainly concentrated in the outer and inner contact of the rhyolitic porphyry at its'' foot wall but the concentration degree is closely related to the intensity of silicifieation and pyritization. Ore mineral associaion is simple and ore types are dominated by fractured-alterd rock type ore. In the mining area Au and Ag show vertical and horizontal zonation. Intense volcaism took place during Late Jurrassic Epoch in Yan-Liao Area with extensive development of volcanics. The gelogical features would lead to finding more envitonments like the Hongshi gold deposit.