| 邵主助,彭振安,蔡明海,刘嘉兴,张含,胡志戍.广西大厂锡矿成因研究进展[J].矿产勘查,2018,9(6):1172-1178 |
| 广西大厂锡矿成因研究进展 |
| Research progress of the genesis of Dachang tin deposit, Guangxi |
| 投稿时间：2017-12-04 |
| DOI： |
| 中文关键词: 大厂锡多金属矿床 岩浆活动 成矿 广西 |
| 英文关键词: Dachang tin polymetallic deposit,magmatism,mineralization,Guangxi |
| 基金项目:广西大厂锡石硫化物型锡矿科学基地研究项目(编号:200911007-13)资助。 |
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| 中文摘要: |
| 广西大厂锡多金属矿床是我国著名的超大型锡矿床,也是中国锡多金属矿业的重要基地。文章从成岩成矿年代学、成矿流体特征、同位素地球化学等三方面论述了近半个世纪以来的大厂锡矿成因研究进展,大厂矽卡岩型锌铜矿形成于95～98Ma,略早于锡多金属成矿年龄91～95Ma,龙箱盖花岗岩成岩年龄主要集中在93～96Ma, 略早于岩脉形成年龄(91±1)Ma,表明区内成岩成矿为燕山晚期同一构造—岩浆热事件的产物。综合近期的野外地质调查,笔者认为大厂锡矿属于岩浆热液成因,成矿与燕山期岩浆活动密切相关。成矿物质主要来源于与岩浆作用有关的上地壳,但也显示出地幔物质显著参与成矿,该矿床是燕山期壳幔相互作用的产物。 |
| 英文摘要: |
| The Dachang tin polymetallic deposit in Guangxi province is a famous super large tin deposit in China and an important base for China’s tin polymetallic mining. This paper discusses the origin of Dachang tin deposit from three aspects:diagenetic and metallogenic chronology, ore forming fluid characteristics and isotopic geochemistry. The Dachang skarn type zinc copper deposit formed in 95 ~ 98Ma, slightly earlier than the tin polymetallic metallogenic age of 91~95Ma, while the age of Longxianggai granite rock mainly concentrated in 93~96Ma, slightly earlier than the dike formation age of (91±1)Ma. It indicates that the diagenesis and mineralization took place simultaneously and resulted from the same tectono- magmatic thermal event in late Yanshanian. Based recent field geological investigations, author thinks that the Dachang tin deposit belongs to the magmatic hydrothermal origin and mineralization is closely related to magmatic activities in the Yanshanian. The ore-forming materials were mainly derived from the upper crust related to magmatism, but also shows that the mantle materials were involved in the mineralization. The deposit is a product of the crust-mantle interaction in the Yanshan epoch. |
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