CAJ | 학술논문

广东东莞厚街黑头山黑云母二长花岗岩体锆石SHRIMP U-Pb测定其岩浆结晶年龄为151.6 Ma（晚侏罗世），属燕山期岩浆活动产物。岩石化学成分富SiO2（>70%），富K2O(>4%)；相对贫Al2O3(12%~14.4%），贫Sr、Ba、Eu、Ti和P；稀土配分曲线呈海鸥型，具明显的负铕异常。多方法综合判断认为黑头山花岗岩具明显的A型花岗岩特征，属弱过铝质A1型花岗岩，应是燕山期岩石圈拉张减薄构造背景下所形成的侵入岩体。
엄동동완후가흑두산흑운모이장화강암체고석SHRIMP U-Pb측정기암장결정년령위151.6 Ma（만주라세），속연산기암장활동산물。암석화학성분부SiO2（>70%），부K2O(>4%)；상대빈Al2O3(12%~14.4%），빈Sr、Ba、Eu、Ti화P；희토배분곡선정해구형，구명현적부유이상。다방법종합판단인위흑두산화강암구명현적A형화강암특정，속약과려질A1형화강암，응시연산기암석권랍장감박구조배경하소형성적침입암체。
Heitoushan biotite monzonitic granite in Houjie Town, Dongguan, Guangdong province is located in the west end of Dalingshan complex granites, zircon SHRIMP U-Pb age show that it formed at 151.6 Ma (Late Juras-sic), which belongs to product of Yanshanian magmatism. On the chemical composition of the rock, Heitoushan granite rich in SiO2 (>70wt%), K2O (>4wt%);relatively poor in Al2O3 (12~14.4 wt%), poor in Sr, Ba, Eu, Ti and P;rare earth distribution curve shows the seagulls type, with obvious negative Eu anomaly. Comprehensive dis-crimination method found that Heitoushan granite possess obvious characteristics of A-type granite, further can be divided into peraluminous A1-type granite. This paper argues that Heitoushan A-type granite formed in Yansha-nian period under the background of the structure of the lithosphere extensional thinning.