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石英碳酸盐型金矿床
相关语句
  quartz carbonate gold deposits
     Quartz carbonate gold deposits are a major source of gold. They occupy a dominant position in greenstone belt gold deposits.
     石英—碳酸盐型金矿床是金的主要来源之一,在绿岩带金矿中占有重要地位。
短句来源
  相似匹配句对
     Abstract: The Daping Gold Deposit belongs to a polymetallic deposit of gold-sulfide quartz vein type.
     大坪金矿石英多金属硫化物矿.
短句来源
     The gold deposit belongs to the type of rich-quartz-vein polymetallic gold deposit.
     属浅而富石英多金属金矿
短句来源
     TYPOMORPHIC OF QUARTZ FROM ZHILINGTOU GOLD DEPOSIT, SUICHANG,ZHEJIANG PROVINCE
     浙江遂昌治岭头金矿石英
短句来源
     METALLOGENETIC FEATURES OF XIAOYINGPAN QUARTZ CARBONATE GOLD DEPOSIT, HEBEI PROVINCE
     河北小营盘石英-碳酸盐金矿成矿地质特征
短句来源
     QUARTZ VEINS AND THEIR FEATURES OF MICRO-GRAIN TYPE DISSEMINATED GOLD DEPOSITS IN NORTH-WESTERN SICHUAN PROVINCE
     川西北微细浸染金矿石英脉及其特征
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Quartz carbonate gold deposits are a major source of gold. They occupy a dominant position in greenstone belt gold deposits. They formed chiefly in late Archaean time, 2. 5 - 2. 9 Ga ago. with huge reserves. Their mineral association is simple and stable, but their are developed various wall-rock alterations, such as silicification. ankerite breunnerite alteration, sericitic alteration and pyrite alteration. Especially, ankerite alteration played an important role in greenstone gold mineralization, being closely...

Quartz carbonate gold deposits are a major source of gold. They occupy a dominant position in greenstone belt gold deposits. They formed chiefly in late Archaean time, 2. 5 - 2. 9 Ga ago. with huge reserves. Their mineral association is simple and stable, but their are developed various wall-rock alterations, such as silicification. ankerite breunnerite alteration, sericitic alteration and pyrite alteration. Especially, ankerite alteration played an important role in greenstone gold mineralization, being closely related to the ductile shear zone. Ankerite has 813C of - 4+2‰, and is of probable mantle origin. In field investigations of the Xiaoyingpan gold deposits, the writers found that ankerite carrying large amounts of gold and other ore substances has replaced early gold-quartz veins and mylonite and that they together formed rich gold lodes. The gold bearing ankerite in the mine has average 813C of -4. 13‰, its Pb-Pb isochron age is 2711 + 238 Ma. According to the structural setting and minerogenetic characteristics of the deposits, as well as the carbon and lead isotopic data of gold-bearing ankerite, the writers can determine that the Xiaoyingpan gold deposit belong to high-grade metamorphic greenstone belt gold deposits. This is an important progress in gold deposits research in China, which may help to further carry out comparative studies and promote prospecting of gold and related useful minerals in the North China platform and greenstone belts.

石英—碳酸盐型金矿床是金的主要来源之一,在绿岩带金矿中占有重要地位。绿岩带金矿成矿时代古老(2.5—2.9 Ga),规模巨大,矿物成分简单而且稳定,发育石英、铁白云石或铁菱镁矿、绢云母、黄铁矿等围岩蚀变。而且铁白云石化蚀变在绿岩带金矿成矿中起重要作用,与韧性剪切带关系密切,铁白云石δ~(13)C值为-4±2‰,可能是地幔来源的标志。本项研究发现,小营盘金矿的铁白云石蚀变作用,携带了大量金等成矿物质沿着SN向张扭性断裂交代早期含金石英脉和糜棱岩,共同构成金的富矿体;含金铁白云石蚀变岩的δ~(13)C值平均为—4.13‰,Pb—Pb等时线年龄为2711±238 Ma。结合矿床产出的构造背景和成矿特征,可以初步确定小营盘金矿属于高级变质的绿岩带金矿,这是我国金矿地质学研究的一项新进展,希望有助于华北陆台与绿岩带有关矿产的研究和找矿及国际对比。

 
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