摘要
出露于康定跑马山、丹巴格宗、公差等地的变质核杂岩地层 ,原岩为中酸性—中基性火山岩及沉积岩 ,经混合岩化及花岗岩化作用 ,形成一套正片麻岩及副片麻岩地层。获得 15 85～ 2 341Ma原岩成岩同位素年龄值。应属康定群 ,时代为中元古代—太古代 ,为康滇地轴扬子地台结晶基底向北露头的延伸。
Protolith of the metamorphic core complex exposed in the Mt. Paoma, Kangding, Gezong and Gongchai, Danba was composed of intermediate-acid and intermediate-basic volcanic rocks and sedimentary rock which have metamorphosed to orthogneiss and paragneiss by migmatization and granitization. The protolith yields an isotopic age of 1585～2341 Ma. Therefore, they belong to the Proterozoic to Archean Kangding Group, being a part of the crystalline basement of the Kangdian Axes of the Yangtze Platform.
出处
《四川地质学报》
2003年第3期129-133,共5页
Acta Geologica Sichuan
