摘要
付坊花岗岩出露在武夷山西坡中段。在１：５万广昌县幅区调工作中，通过对其岩性、化学成分、结构、构造等演化特征的研究，将其划分为洋背、高洲、胡竹、太和、石咀圩５个单元，归并为一个超单元；根据其Ｕ－Ｐｂ法同位素年龄确定其侵位时代为晚奥陶世，属加里东造山期岩浆活动的产物；侵位机制属早期底辟、晚期轻气球膨胀强力型主动就位。
Fufang granites are exposure in the middle section of the west slop of Wuyi Mountain. Based on regional geological survey at the scale of 1: 50000 over the Guangchang-sheet area and through the studying on the developing feature of their lithological characters, chemical components, texture and structure, they are divided into Yangbei, Gaozhou, Fuzhu, Taihe and Shizhuixu 5 units which are merged one superunit. U-Pb isotopic analysis indicates the emplacement occurring in late Ordovician, which are the products of magmatic activites during the Caledonian orogeny. The mechanism of emplacement is dominated by diapirism in the early stage and by forceful and active emplacement in the form of swelling hydrogen ballon in the late stage.
出处
《江西地质》
2000年第1期21-27,共7页
Jiangxi Geology
关键词
花岗岩
地质特征
加里东期
侵位机制
广昌县
Fufang granite
geologic features
Caledonian Period
mechanism of emplacement
Guangchang county
