摘要
华南某矿区是一个含钨石英脉矿床，同时也是一个花岗岩浸染型钨及稀有元素矿床。该矿区除有其独特的地质特征外，且与我国的同类矿床具有相似的普遍性。因此，从气液包裹体的角度来探讨其成岩成矿的物理化学条件，对该类型矿床的成因及寻找新的矿床，具有一定理论和实际意义。
Formation temperatures have been determined on quartz of biotite granite (640℃), two-mica granite (550℃), museovite granite (526℃), and on the feldspar-quartz zone (503℃) and quartz zone (445℃) of pegmatoid by homogenization runs made on fluid inelusions in quartz from a deposit in Southern China. The temperatures of mic-roclinization, wolframite and carbonate mineralization of wolframite-quartz veins are 293℃, 260?87℃, and 129℃ respectively. In considering the information about the geological setting, petrochemical composition, characteristics of mineralization and fluid inclusion as well as formation temperatures, it is apparent that biotite granite, two-mica granite and museovite granite in this district are comagmatic products at different stages during the differenciation process. The pegmatoid, which may serve as a good indicator of rare-element-bearing granites, formed in the late period of magmatic differenciation, and the wolframite-quartz veins proved to be postmagmatic high-temperature hydrothermal ore deposits.
出处
《地球化学》
CAS
1974年第3期145-156,共12页
Geochimica
