| 伊春地区晚奥陶世花岗质岩石中闪长质包体的成因 |
| |
| 引用本文： | 潘,贵,刘宝山,李仰春.伊春地区晚奥陶世花岗质岩石中闪长质包体的成因[J].中国地质,2002,29(4):364-368. |
| |
| 作者姓名： | 潘 贵 刘宝山 李仰春 |
| |
| 作者单位： | 黑龙江地质调查研究总院齐齐哈尔分院,黑龙江,齐齐哈尔,161005 |
| |
| 基金项目： | 1∶5万区域地质调查项目。 |
| |
| 摘 要： | 在黑龙江省伊春地区笑山河林场一带，发育一套成分演化序列的晚奥陶世花岗岩体，通过系统的1：5万区调工作，对其进行了详细的研究和划分，建立了北影林场序列的谱系填图单位。其笑山河单元细中粒似斑状含角闪石黑云母二长花岗岩中普遍发育闪长质包体，多呈大小不等的椭圆状分布于岩体边部。经对花岗质岩石和闪长质包体岩石学，矿物学，岩石地球化学等的详细研究发现，二者在成因上具联系性，演化上具亲缘性，闪长质包体是不混溶包体，是长英质岩浆发生融离不混溶作用时自身演化的结果。
|
| 关 键 词： | 晚奥陶世 笑山河单元 闪长质包体 不混溶包体 伊春地区 花岗质岩石 成因 |
| 文章编号： | 1000-3657(2002)04-0364-05 |
Genesis of dioritic inclusions in Late Ordovician granitic rocks in the Yichun area |
| |
| PAN Gui,LIU Bao-shan,LI Yang-chun.Genesis of dioritic inclusions in Late Ordovician granitic rocks in the Yichun area[J].Chinese Geology,2002,29(4):364-368. |
| |
| Authors: | PAN Gui LIU Bao-shan LI Yang-chun |
| |
| Institution: | Qiqihar Branch, Heilongjiang Institute of Geological Investigation and Research, Qiqihar 161005, Heilongjiang, China |
| |
| Abstract: | A compositional evolu tionary series of Late Ordovician granite bodies is developed in the vicini-ty of the Xiaoshanhe Tree Farm in the Yichun area,Heilongjiang Province.Through systematic1:50000regional survey,the series has been studied and classi fied in detail and the hierarchical mapping units of the Beiying Tree Farm have been established.Dioritic inclusions are common in fine-to medium-grained, porphyritic hornblende-bearing biotite monzogranite of the Xiaoshanhe unit.Mo st of these inclu-sions occur as elliptical grains of varying size at the edges of the granite intrusions.Intensive petrological,mineralogical and rock geochemical studies of the granitic rocks and dioritic inclusions indicate th at the rocks and inclusions are genetically related and have an affinity in evo lution.The dioritic inclusions are im-miscible ones and resulted from the evo lution of the felsic magma during its liquation. |
| |
| Keywords: | Late Ordovician Xiaoshanhe unit dioritic inclusion immiscible inclusion Yichun area |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《中国地质》浏览原始摘要信息 |
| 点击此处可从《中国地质》下载免费的PDF全文 |
