The Deep Oversize Gold Deposit in the Jiaojia Field, Shandong Province and Its Enlightenment for the Jiaojia-Type Gold Deposits

• 责任者：Song Mingchun (Shandong Provincial Bureau of Geology and Mineral Resources ; Jinan 250013 ; China) ; Cui Shuxue
• 刊名：Acta Geologica Sinica
• 出版年：2010
• 卷期：84(9)
• 关键词：金矿 ; gold ores ; 沉积建造 ; sedimentary formation ; 山东 ; Shandong Province
• 页码：p.1349-1358
• 图表：6 illus., 1 table, 24 refs.
• 分类号：1001
• issnNo：ISSN0001-5717
• isbnNo：CN11-1951/P

Three years of geological exploration found a 105 ton deep oversize gold deposit and defined 89 orebodies in the Jiaojia field, Shandong Province.  They are classified into four orebody groups, in which the I-1main orebody was found to occur along the major fault surface of the Jiaojia fault.  The total reserves of gold in the Jiaojia deposit amounts to 230 ton or so, and made it one of world-class largest gold deposits.  Comparison study of gold deposits located at both depth and shallow reveals the law of gold mineralization. The results show that there is no ore-free interval or weak mineralized zones between them and thick gold orebodies occur below the turning point from steep to flat of the Jiaojia fault.  Mineralization model of the Jiaojia gold belt is characterized by “one tectonic belt, two mineralized enrichment zones and three mineralized alteration zones”.  The K-Ar isotopic ages of the Jiaojia fault are 131.05～123.53 Ma and 48.57～41.18 Ma,  indicating that the fault formed synchronously as major mineralization