四川拉拉IOCG礦床圍巖及礦石REE地球化學(xué)特征
[Abstract]:The Lala Fe-Cu-Mo-Au-REE polymetallic deposit in Sichuan is located in the southwest margin of the Yangtze plate and the middle section of the Kangdian axis. It is a typical iron oxide-copper-gold (IOCG) deposit in southwest China. The source of ore-forming material and the properties of metamorphic rocks are discussed by studying the (REE) of rare earth elements in the surrounding rock and metamorphic hydrothermal ore forming period. The results show that the positive Eu anomaly of surrounding rock is affected by the addition of plagioclase heaps in the partial melting process of the provenance region, and the positive anomaly of ore Eu is inherited surrounding rock, which is partly characterized by negative Eu anomaly due to volcanogenic apatite. F- metamorphic hydrothermal metasomatism of the surrounding rock, REE activation migration with the ore precipitation, resulting in the total amount of ore REE is higher than the surrounding rock, combined with the surrounding rock similar to the REE distribution model, it is concluded that the ore-forming material originated from the surrounding rock. The source rocks of sodium feldspar granulites are volcanic rocks, and the biotite schist rocks are mixed with volcanic rocks and some sediments, which may have experienced a process similar to that of submarine hydrothermal system sediments.
【作者單位】: 成都理工大學(xué)地球科學(xué)學(xué)院;
【基金】:國(guó)家自然科學(xué)基金項(xiàng)目(41072065) 教育部博士點(diǎn)基金項(xiàng)目(20105122110001) 中國(guó)地質(zhì)調(diào)查局項(xiàng)目(12120113095500)
【分類號(hào)】:P618.2
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