摘要
内蒙古呼都格高勒似斑状黑云正长花岗岩体位于宁夏与内蒙古交界的贺兰山北段，岩石类型相对单一，SiO2含量62．93％-70．86％，A／CNK介于0．98-1．14，属过铝质碱性花岗岩。LREE富集强烈，具强烈的铕负异常。锆石U—PbLA—MC—ICP-MS年龄为1950Ma，为古元古代产物。通过似斑状黑云正长花岗岩地球化学特征、图解判别等的综合研究，认为该岩体属上地壳深熔花岗岩，形成于阴山陆块与鄂尔多斯陆块碰撞构造环境。
Proterozoic porphyaceous biotite granitic pluton in Hudugegaole of Inner Mongolia is located at the north section of Helan Mountain. It should be peraluminous alkali granite, the content of SiO2 is 62.93% 70.86%,A/CNK 0.98-1.14. LREE is enriched intensively, but Eu showing negative anomaly. The age is 1950Ma determined by U-Pb dating （LA-MC-ICP-MS）. The study suppose that this rock mass should be crustal deepmelt granite, formed landmass collision between Yinshan and Erdos Block.
出处
《甘肃地质》
2015年第2期30-36,43,共8页
Gansu Geology
