山东苍峄铁矿带预测模型

位于山东省南部苍山-枣庄地区的苍峄铁矿带是一条大型沉积变质型铁矿带，其铁矿储量巨大。为了更好地适应新形势下的铁矿勘查工作，建立了该区的铁矿预测找矿模型，以期提高区内铁矿勘查效率。简要介绍了区内铁矿成矿地质背景，并详细阐明了南山村地区铁矿床特征：该矿床赋存于新太古代泰山岩群山草峪组中；铁矿体的产状呈层状、似层状；矿石为磁铁角闪石英岩和磁铁石英岩，属需选弱磁性铁矿石，为“鞍山式”贫铁矿。区内水文地质条件属简单-中等类型，工程地质属简单类型，环境地质属中等类型。区内的勘查工作证实，明显的磁异常部位是该铁矿带最重要的找矿标志之一。从岩石类型、成矿时代、含矿地层、含矿建造、控矿构造、矿物组合、结构构造、矿体产状、磁异常、重力异常和地形地貌方面建立了苍峄铁矿带的区域综合预测找矿模型。

Prospecting Model of Cangyi Iron Metallogenic Belt in Shandong Province, China

Cangyi iron metallogenic belt, located in the Cangshan-Zaozhuang area, is a large sedimentary-metamorphic iron metallogenic belt and contains huge iron ore reserves. In order to adapt to the new situation of the iron ore exploration, the forecasting and prospecting model of this iron deposit type are built to improve the exploration efficiency in the region. The authors introduce metallogenic geological background briefly and clarifies the iron ore deposit characteristics of Nashan Villige area in detail. The iron ore bodies occur in the strata of the Shancaoyu Formation of the Neoarchean Taishan Group, displaying layered and stratiform-like. In this deposit, the iron ore is magnetite-amphibole quartzite and magnetite quartzite, and its industrial type is weak magnetic dressing type. This iron deposit belongs to the Anshan type of iron deposit.  The hydrogeological condition belongs to simple-medium classification associated with simple engineering geology feature and medium environmental geology type. The previous iron exploration in the region confirmed that the obvious part of magnetic anomaly is one of the most important prospecting criteria of Cangyi iron metallogenic belt. The regional comprehensive forecasting and prospecting models of this belt are built based on the rock types, mineralization age, ore-bearing strata, ore-bearing and ore-controlling structure, mineral assemblages, texture and structure, orebody occurrence, magnetic anomaly, gravity anomaly and topography.