| 廖宗廷.广西大厂超大型锡多金属矿床成矿条件及成矿模式[J].地质找矿论丛,1994,(2):1-9 |
| 广西大厂超大型锡多金属矿床成矿条件及成矿模式 |
| ON THE METALLOGENIC CONDITION AND MODEL OF DACHANG SUPER Sn POLYMETALLIC DEPOSIT IN GUANGXI |
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| DOI：10.6053/j.issn.1001-1412.1994.2. 001 |
| 中文关键词: 成矿条件 热水活动 大厂超大型矿床 |
| 英文关键词: |
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| 中文摘要: |
| 广西大厂超大型矿床是在有利构造条件、物质条件和物理化学条件下长期、多阶段、多种成矿作用叠加的产物。前加里东─加里东期的大陆边缘和地体拼贴为成矿准备了丰富的Sn、Cu、Zn、W、Sb、Ag、Au等成矿物质;华力西期地壳蠕散拉张形成狭窄而深度较大的拗陷型成矿盆地,其间受同生断裂控制的循环热水活动从基底乃至更深部岩石中溶取并带出成矿物质,它们在海底沉积形成层状矿体或矿源层;印支─燕山期的地壳变形、重熔岩浆活动进一步带出成矿物质,并使华力西期的层状矿体和矿源层的成矿物质活化转移、富集,形成叠加改造的脉状富矿体。 |
| 英文摘要: |
| Dachang Sn polymetallic ore deposit is a super sized mineral deposit that occurs in Devonian System in Danchi fracture depression. Its mineralization underwent multistage evolution. It was a product of the superposition of multimineralization under the beneficial tectonics, water-deepness, mineralizing material and physio-chemical conditions. The primary mineralizing materals were developed by sedimentation of continental margin in pre-Devonian Period, The mineralizing basin were formed by crust extension-created creeping tensionin at Varisan Period. The deep magmatism caused by the contemporaneous fractures supplied heat source to drive sea-water convection cycle in which metals in basement rocks were leached out and carried to sea-floor along fractures. They deposited in sea-floor to form bedded orebodies and source beds. Teotonics and magmatic activity that occured in Indosinian-Yanshanian time made the metalls be remobilized, transformed and enriched to form vein orebodies superimposing above bedded orebodies. |
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