鲁西归来庄金矿床深部外围找矿前景

鲁西地区归来庄金矿床找矿始于1987年初,历经"六进六出"的坚持不懈,探求金金属量34.8t,填补了鲁西地区无大型金矿的空白。近几年,山东省鲁南地质工程勘察院在归来庄金矿床深部及外围开展的勘查工作,扩大了归来庄主矿体的规模,并且证实归来庄主矿体沿F1构造蚀变带向深部尚未封闭,仍有良好找矿前景。目前归来庄金矿累计探明金金属量超过50t,是鲁西地区唯一的特大型金矿床。该文在系统分析以往成果资料基础上,系统归纳了归来庄主矿体地质特征,建立了铜石杂岩体周边多种金矿化类型"一体多型"成矿模式,指出了下步找矿方向:归来庄金矿床深部找矿仍以寻找隐爆角砾岩型为主,外围重点围绕"一带多区",争取早日实现铜石地区找矿新突破。

Prospecting Potential in the Depth and Periphery of Guilaizhuang Gold Deposit in Western Shandong Province

The prospecting of Guilaizhuang gold deposit began in early 1987. After the persistence of "six in and six out", 34.8 tons of gold metal has been explored. It has filled the blank of no largescale gold deposit in western Shandong province. In recent years, the exploration work has been carring out by Lunan Geoengineering Exploration Institute in the depth and periphery of Guilaizhuang gold deposit. It has expanded the scale of main ore bodies, and confirmed that main ore bodies of Guilaizhuang gold deposit have not been closed to the deep part along F1 structural alteration zone, and still has good prospecting prospects. At present, Guilaizhuang gold deposit is the only superlarge scale gold deposit in western Shandong province with a cumulative amount of proven gold over 50 tons. On the basis of systematic analysis of previous data, geological characteristics of main ore bodies in Guilaizhuang have been summarized systematically in this paper. The "one body and many types" metallogenic model of various gold mineralization types around the copper ore complex has been estalished, and the next prospecting direction has been pointed out. The prospecting in the deep part of Guilaizhuang gold deposit is still seeking for cryptoexplosive breccia type; whiel in the peripheral area, "one zone and many areas" is the key direction. Early breakthroughs for prospecting are expected in Tongshi area.