福建沿海堆晶辉长岩的Sm-Nd年龄及意义  

Sm-Nd Isochron Age of the Cumulate Gabbro from the Fujian Coastal Region, Southeastern China, and Its Implication

作　　者：王志洪[1] 卢华复[2] 

机构地区：[1]中国科学院地质研究所岩石圈构造演化开放实验室,北京100029 [2]南京大学地球科学系,210008

出　　处：《地质论评》1999年第4期408-411,共4页Geological Review

摘　　要：本文测定了福建沿海莆田戴前山堆晶角闪辉长岩的Sm-Nd同位素年龄,由堆晶角闪辉长岩、斜长石和角闪石得到的全岩-矿物Sm-Nd内部等时线年龄为95±2Ma,记录了戴前山堆晶角闪辉长岩的结晶年龄。该年龄可能反映了辉长岩是碰撞造山带中的同构造侵入岩。Sm-Nd isotopic dating of the cumulate amphibole gabbro from Daiqianshan in the Fujian coastal region, southeastern China, yields a Sm-Nd whole-rock-mineral internal isochron age of 95 ± 2 Ma, representing the crystallization time of the gabbro. This age may imply that the gabbro is a syntectonic intrusive rock in the collision erogenic belt.

关 键 词：辉长岩 同位素年龄 福建沿海 钐-钕 

分 类 号：P588.125[天文地球—岩石学] P597[天文地球—地质学]