| 川西北羊拱海花岗岩体的地球化学特征及成因探讨 |
| |
| 引用本文： | 罗改,杨学俊,白宪洲,熊昌利,郑先纬.川西北羊拱海花岗岩体的地球化学特征及成因探讨[J].甘肃地质学报,2009(3):18-24. |
| |
| 作者姓名： | 罗改 杨学俊 白宪洲 熊昌利 郑先纬 |
| |
| 作者单位： | 成都理工大学;四川省地质调查院 |
| |
| 基金项目： | 中国地质调查局项目“四川1∶25万若尔盖县、红原县、炉霍县、马尔康县幅区调修测”(编号1212010510304) |
| |
| 摘 要： | 位于松潘甘孜褶皱带东部三角区内的羊拱海岩体主要是由中心相酸性的二长花岗岩向边缘相中酸性的花岗闪长岩的过渡。通过对该花岗岩体的常量元素、微量元素及稀土元素地球化学特征的研究可知，羊拱海花岗岩属于高钾钙碱性、弱过铝一过铝质岩石系列，Rb、Th、K等富集，Ti、Ba、Nb、Sr、P明显亏损，表现为较平坦的具有较弱Eu亏损的稀土配分模式；岩体具有I型与S型花岗岩过度类型的特点，是在印支晚期区域上大规模的陆—陆碰撞造山环境中形成的。
|
| 关 键 词： | 川西北 羊拱海 花岗岩体 地球化学 |
GEOCHEMICAL CHARACTERISTICS AND DISCUSSION ON PETROGENESIS OF YANGGONGHAI GRANITE BODY IN NORTHWESTERN SICHUAN |
| |
| LUO Gai,YANG Xue-jun,BAI Xian-zhou,XIONG Chang-li and ZHENG Xian-wei.GEOCHEMICAL CHARACTERISTICS AND DISCUSSION ON PETROGENESIS OF YANGGONGHAI GRANITE BODY IN NORTHWESTERN SICHUAN[J].Acta Geologica Gansu,2009(3):18-24. |
| |
| Authors: | LUO Gai YANG Xue-jun BAI Xian-zhou XIONG Chang-li and ZHENG Xian-wei |
| |
| Institution: | 1.Chengdu University of Technology,Chengdu 610059,China;2.Sichuan Institute of Geological Survey,Chengdu 610081,China) |
| |
| Abstract: | Yanggonghai granite body, located in triangle region of the eastern Songpan-Ganzi folded zone, which mainly transformed from acid monzogranite in central phase to intermediate-acid granodiotite in marginal phase. Researching on the geochemical characteristics of major elements, trace elements and rare earth elements, we concluded that Yanggonghai granite body, whose Rb, Th and K are enrichment but Ti, Ba, Nb, Sr and P obviously depletion, was attribute to high K calc-alkaline and weakly peraluminous to peraluminous rock seties, with Eu had a relatively weak negative anomaly in REE distribution pattern. This granite body had many features between I-type granite and S-type granite, and it was formed in the environment of a large-scale continent-continent collision in late Indosinian. |
| |
| Keywords: | northwestern Sichuan Yanggonghai granite body geochemistry |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《甘肃地质学报》浏览原始摘要信息 |
| 点击此处可从《甘肃地质学报》下载免费的PDF全文 |
|
