山东省平邑县归来庄金矿深部及外围地质特征及找矿前景分析

Geological Characteristics and Prospecting Prospect in Depth and Surrounding Areas of Guilaizhuang Gold Deposit in Pingyi County of Shandong Province

归来庄金矿床是目前鲁西地区发现的规模最大的金矿床,金矿化类型主要为脉状构造——隐爆角砾岩型。继1994年提交归来庄勘探报告后,山东省鲁南地质工程勘察院针对归来庄金矿床深部先后开展了普查—详查评价工作,扩大了归来庄主矿体的规模、发现了似层状碳酸盐岩型金矿体,并且进一步证实归来庄主矿体沿构造蚀变带向深部尚未封闭。该文通过建立该区矿床组合模型来指导找矿工作,提出下步归来庄金矿床深部找矿仍以寻找隐爆角砾岩型为主、似层状碳酸盐岩型等其他类型为辅,同时兼顾归来庄金矿外围"一带多区"地段,有望实现鲁西铜石地区找矿新突破。

Guilaizhuang gold deposit is the largest gold deposit in Tongshi area in western Shandong province up to now. Gold mineralization type is mainly vein structure- cryptoexplosive breccia type. After submitted Guilaizhuang exploration report in 1994, a series of geological evaluation work has been carried out in the deep of Guilaizhuang gold deposit by Lunan Geengineering Exploration Institute. The scale of Guilaizhuang gold deposit has been expanded, and stratiform carbonate type gold deposit has been found. It is furtherly confirmed that main ore bodies of Guilaizhuang gold deposit in the deep part is not closed along tectonic alteration zone. In this paper, through analysis on the types of deposits, metallogenic model which guides the prospecting work has been established. It is regarded that deep exploration in Guilaizhuang gold deposit is still cryptoexplosive breccia type. Stratiform carbonate type and other types of complementary are secondary. At the same time, taking into account of Guilaizhuang gold deposit along the periphery zone ＂A band and multiple regions ＂, that is expected to achieve new breakthroughs in Tongshi area.