granite porphyry

基本解釋

Xiaokang Mn-Ag multi-metal mine is controlled by structural broken belt and granite-porphyry contact zone of xikou formation of lower-T system.
小康錳銀多金屬鑛受下三曡系谿口組地層、斷裂搆造破碎帶和花崗斑巖接觸帶控制，主要圍巖蝕變有矽卡巖化、角巖化。
Granite-porphyry belongs to high-K calcium-alkali series, which has the geochemical characteristics of the rare earth element and trace element for A-type granite.
花崗斑巖屬高鉀鈣堿性系列，具有A型花崗巖的稀土元素和微量元素地球化學(xué)特征；
Of the various types of deposit, the porphyry type occurs within first stage granite-porphyry and at its contact zone where alteration and mineralization zoning is apparent;
斑巖錫鑛主要産於花崗斑巖巖筒內(nèi)部及其接觸帶，蝕變與鑛化具分帶現(xiàn)象；

花崗斑巖
Zircon LA-MC-ICP-MS U-Pb age for granite porphyry is 154156 Ma,with a weighted mean age of（154.7±0.5）Ma（MSWD=0.085,n=21）,which suggests an early Yanshanian emplacement.
花崗斑巖中鋯石的LA-MC-ICP-MS年代學(xué)研究表明,其U-Pb年齡爲(wèi)154～156Ma,加權(quán)平均值爲(wèi)(154.7±0.5)Ma(MSWD=0.085,n=21),顯示爲(wèi)燕山早期侵位。
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矽化花崗斑巖
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