Gold Exploration Model And Mineralization Predication In Zhao-Ping Fault Zone

The Jiaodong peninsula, accounting for 0.3% of China's land area and hosting 25% of the nation's gold reserve, is one of the most important gold mine concentrating and gold production area. This area underwent a long tectonic-magmatic evolution, and formed a complex geological structural framework and a series of magmatic rocks. Putting into practice the prospecting idea of"Theory direct, exploring depth and blind, focusing on huge belts, breakthrough in key areas", gold deposit research and preliminary geological survey and prospecting have made important progress in recent years.The Zhao-Ping fault zone is the most important gold metallogenic belts in Jiaodong. Lots of research focusing on the deposit-scale observation and analysis were done. While systematic research and summaries of the whole gold belt are weak, and lack of systematic build of deep gold ore body's exploration models of different gold deposit types. It has been proved by the prospecting practice that the successes of mineral deposit prospecting rely on the prediction based on metallogenic regularity studies. Hence, more importance has been attached on the prediction of exploration model building based on geological information integration. Field observations were done, and collected samples of rocks and ores were tested and analyzed. Directed by the metallogenic theory, and in combination of scientific research projects and exploration work, I collected and analyzed systematically the existing data and research results. Summaries were done to geological settings, mineral deposit geology, and regional geochemical and geophysical characters. Analyses were done to factors of gold metallogenic system of the Zhaoping fault zone. Gold mtallogenic prediction was done according to the established exploration model based on summaries of metallogenic regularities and detailed analyses of typical gold deposits.This paper summarized the segment geological features of the Zhaoping fault, Ore-Control Structures, metallogenic regularities, gold prospecting area and metallogenic model. There are three types of gold deposits, the quartz vein type (the Linglong type), the structural altered rock type (the Jiaojia type), and the intermediate type (the Lingshangou type), in the Zhaoping fault zone, which show clear lateral structural, alteration and mineralization zones from proximal phyllic alteration bearing pyrite, phyllic alteration, to distal siliconization and potassic feldspar alteration. From proximal to distal, the degree of crushing decrease from crush rocks to fractured rocks, and the mineralization degree decrease from disseminated and dense stockwork to sparse stockwork. There exist at least two events of mineralization in the Zhaoping fault zone, the former gold mineralization and the later silver and base metal mineralization. The gold mineralization event contains four stages, and the silver and base metal mineralization contains three stages. The sources of ore materials were discussed base on the trace elements analysis. The resources potential of the Zhaoping fault belt was estimated. Based on multi-geology information integration, six exploration models were built in the Zhaoping fault zone. They are gold ore deposit (bodies) integrated forecasting model, gold ore deposit (bodies) location prediction integrated model, geological-geophysical exploration model for Jiaojia type gold deposits, geological-geochemical exploration model for Jiaojia type gold deposits, geological-geophysical exploration model for Linglong type gold deposits, geological-geochemical exploration model for Linglong type gold deposits, deep ore bodies location prediction model. Based on these models, gold prediction was made, and 11 prospecting area were delineated. Satisfactory exploration results were achieved by engineering validation according to the prediction.