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首次获得四川金川县南部的独松岩体锆石U-Pb年龄为200.9±4.3Ma。该岩体属钙碱性系列,富硅、低镁铁、富铝、富钾钠,K_2O较Na_2O偏高,富集大离子亲石元素K、Rb,贫Ba、Sr,高场强元素富等,贫Ta、Nb、Ti、P、Nb、Ta。稀土元素低-中等,轻稀土元素富集,重稀土元素相对亏损,轻重稀土分馏较明显。具弱的负铕异常,无明显的铈异常,具有基本一致的配分模式特征。独松岩体岩石类型为S型花岗岩,在Barbarin的划分方案中属于富钾钙碱性花岗岩类(KCG)。可能形成于造山阶段后碰撞环境。
The zircon U-Pb dating of the Xisong pluton, which was first obtained in the south of Jinchuan County, Sichuan Province, was 200.9 ± 4.3Ma. The rock body is a series of calc-alkaline, rich in silicon, low-magnesium iron, aluminum-rich, potassium-rich sodium, K_2O higher than Na_2O, enriched in large ion lithophile elements K, Rb, lean Ba, Sr, Etc., poor Ta, Nb, Ti, P, Nb, Ta. Rare earth elements are low - moderate, light rare earth elements enrichment, heavy rare earth elements relative loss, fractional light and heavy fractionation more obvious. Weak negative europium anomaly, no obvious cerium anomalies, and a basically consistent pattern of partitioning patterns. The Simang rock body is S-type granite, belonging to K-rich calc-alkaline granitoids (KCG) in the Barbarin classification scheme. May be formed in the orogenic phase after the collision environment.