摘要
讨论山东诸城胶南混杂岩系中的榴辉岩属地壳角闪岩相变质成因,其Sm—Nd等时年龄为222±6Ma,^(143)Nd/^(144)Nd初始比值为0.51136±0.00003,θ(T) 为-19.4±0.5,代表了早三叠世华南陆块与华北陆块碰撞拼合,并发生高压变质作用。后期的陆壳推覆及伸展构造使深部榴辉岩上升侵位于胶南混杂岩系中。
The eclogite within the Jiaonan mingling rock series from Zhucheng, southern Shandong Province was metamorphic genesis of amphibole face in crust, its Sm-Nd isochronism age was 222±6Ma, 143Nd/144Nd primary ratio was 0. 51136±0. 00003, and ε(T) was - 19 ,4±0. 5. representing the collision event of the southern China plate to the northern China plate at the early Trissic period, and the occurence of high-pressure metamorphism. The continental napping and spreading caused the deep eclogite uplift and mixing in the Jiaonan mingling rock series.
关键词
榴辉岩
年龄
混杂岩系
钐
钕
Eclogite
Sm-Nd isochronism age
the Jiaonan mingling rocks scries
Shandong Province
