中文摘要:中国前寒武纪金矿床的主要类型有绿岩带型、浅变质碎屑岩型、条带状铁建造型金矿床。其中以绿岩带型和浅变质碎屑岩型金矿床最为重要。金矿床的形成与中国前寒武纪地壳演化密切相关。金的主成矿期从新太古代到新元古代。在新太古代,华北陆块地壳处于强烈活动状态,广泛发育海相火山作用,在古陆核边缘和古岛孤带形成太古宙绿岩带型金矿床。古元古代在初始克拉通化的华北古大陆开始裂解和离散,在东北缘辽吉陆内裂谷形成猫岭等浅变质碎屑岩型金矿床,在扬子陆块的东南缘,在活动大陆边缘的中-新元古代冷家溪群、板溪群中形成同生热水喷流的沃溪等浅变质碎屑岩型钨-锑-金矿床。古元古代在山西滹沱群底部变质砾岩中产出变质砾岩型金矿床。在新元古代杨子陆块和华夏陆块之间的活动大陆边缘拚贴会聚带分布着条带状铁建造金矿床。
Abstract:Precambrian is the main epoch of gold mineralization in China. The main types of Precambrian gold deposits in China include greenstone-hosted gold deposits, low grade metaclastics-hosted gold deposits, BIF (banded iron formation)-hosted gold deposits and metaconglomerate-hosted gold deposits, of which the most important ones are greenstone-hosted and low grade metaclastics-hosted gold deposits. The formation of Precambrian gold deposits in China is closely related to the evolution of Precambrian earth crust. The main metallogenic epochs are from Neoarchean to Neoproterozoic. In Neoarchean, The North China Platform was intensely active and the marine facies volcanism was extensively developed. Archean greenstone-hosted gold deposits were formed in the margin of the paleocontinental core and island arc zone. In Paleoproterozoic, the initially cratonized North China Paleocontinent started breakup. Low grade metaclastics-hosted gold deposits, such as the Maolin gold deposit, were formed in the northeastern margin of the rift within the continent of Liaoning and Jiling Provinces. At the same time, low grade metaclastics-hosted gold deposits of syngenetic hydrothermal exhalative sedimentary origin, such as the Woxi W-Sb-Au gold deposit, were formed in Meso-Neoproterozoic Lengjiaxi and Banxi Groups along the active continental margin of the Yangtze Platform. Metaconglomerate-hosted gold deposits distributed in the lower part of Hutuo Group in Shanxi Province were formed in Paleoproterozoic. The BIF (banded iron formation)-hosted gold deposits distributed in the collage convergent zone of the active continental margin between Yangtze and Cathaysian Platforms were formed in Neoproterozoic.
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基金项目:地质大调查综合研究项目(K1.4-3-1)《前寒武纪成矿作用》
引用文本:
胡小蝶,沈保丰,杨春亮.2004.中国前寒武纪金矿床[J].矿床地质,23(Z):71~77.2004.Precambrian Gold Deposits of China[J].Mineral Deposits23(Z):71~77
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