摘要
海南岛金矿按工业利用特点和赋矿围岩岩性可分为七大类,各种类型金矿空间分布有一定的规律.按与主要断裂带的关系可圈出七个金成矿带,其中北东-北北东向四个,东西-北东东向三个.研究表明,前者多为多期次复成因矿床,加里东期变质-混合岩化热液、海西-印支期剪切起了重大作用,远景一般较大;后者多为单期次单成因矿床,主要与燕山期岩浆热液或火山热液作用有关,目前尚未发现较大金矿,但其中某些地段可能成为具一定规模的金-银矿远景区.
The gold deposits in Hainan island are divided into seven types in terms of the industrial utilization and host lithologies. They are (1) altered rock gold deposits occurring in fractured zones; (2) quartz vein gold deposits; (3) continental facies volcanic gold deposits; (4) stratiform veinlet-disseminated gold deposits; (5) skarn gold deposits; (6) polymetal-associated gold deposits; (7) modern placer. They distribute regularly in spaceBased on relation with major faulted zones, seven metallogenic belts can be determined in which four gold belts are extended in NE and NNE direction whereas others are in EW, NEE direction. Studies show that the deposits in the former four belts have generally a favourable source bed and are controled by long-term and repeated structures They are polygenesis deposits with large potential Caledonian metamorphic-migmatized hydrothermal activity and Hercynian Indo - China ductile shearing had played an impertant role in mineralization.On the contrary, the deposits in the latter three belts are simple genetically. They had mainly related with Yanshan magmatic and volcanic hydrothermal activities. Up till now, any larger gold deposit is still not discovered. However, there are indications that some area in the belts will possibly become gold-siver prospects.
出处
《地质找矿论丛》
CAS
CSCD
1992年第3期71-82,共12页
Contributions to Geology and Mineral Resources Research
