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中文摘要：
川西康定地区出露的变质侵入岩是以石英闪长岩、英云闪长岩和花岗闪长岩为主的中酸性岩浆岩。岩石中锆石主要结晶于721～773Ma，表明其形成于新元古代；岩体中所测最老年龄为2468Ma，可能代表扬子陆块的基底；在锆石的增生边及新生锆石颗粒获得的99～531M。年龄反映了后期变质事件的改造。该岩体的主量元素显示钙碱性分异趋势，微量元素呈现典型的岛弧环境地球化学特征，即相对富集大离子亲石元素、轻稀土元素，亏损高场强元素和的富集。以上的特征表踢，康定地区变质侵入岩在新元古代可能处于与俯冲有关的岩浆弧环境。
英文摘要：
The Kangding metamorphosed intrusions are mainly composed of quartz diorite-tonalite -granodiorite. The ages of igneous zircons from the complex range from 721 to 773 Ma, which shows the intrusive activity during Neoproteronoic. The oldest age obtained from the intrusions is 2 468 Ma, implying the involvement of materials from Yangtze craton basement. The ages of 99-531 Ma produced from zircon rims may reflect later metamorphic events. The complex shows a calc-alkaline differential trend in major elements, and the trace elements exhibit typical geochemical features of the island arc setting.
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