| 甘肃金塔县老虎山晚古生代华北型富镁埃达克岩的发现及构造动力学意义 |
| |
| 引用本文： | 王启航,王晓伟,杨春霞,高 翔,赵 玮.甘肃金塔县老虎山晚古生代华北型富镁埃达克岩的发现及构造动力学意义[J].甘肃地质学报,2014,23(1):28-34. |
| |
| 作者姓名： | 王启航 王晓伟 杨春霞 高 翔 赵 玮 |
| |
| 作者单位： | [1]甘肃省地矿局第三地勘院,甘肃兰州730050 [2]中国地质大学（北京）,北京100083 |
| |
| 摘 要： | 甘肃省金塔县老虎山一带首次发现的华北型富镁埃达克岩,地球化学特征表明具有典型C型埃达克岩特征,表现为高Sr低Y、高钾低钠,富集LREE,亏损HREE,无Eu异常或轻微异常,Mg#值(0.56)等特征显示出具有加厚下地壳部分熔融并和玄武岩浆发生混合作用的产物,暗示志留纪晚期北山古大洋已消亡,明水—公婆泉地体和马鬃山中间地块发生碰撞拼接,为北山构造演化提供了依据。
|
| 关 键 词： | 埃达克岩 构造动力学 成矿作用 晚古生代 老虎山 甘肃金塔 |
LATE PALEOZOIC ADAKITIE ROCKS IN LAOHUSHAN OF GANSU AND THEIR TECTONODYNAMICS SIGNIFICANCE |
| |
| WANG Qi-hang,WANG Xiao-wei,YANG Chun-xia,GAO Xiang,ZHAO Wei.LATE PALEOZOIC ADAKITIE ROCKS IN LAOHUSHAN OF GANSU AND THEIR TECTONODYNAMICS SIGNIFICANCE[J].Acta Geologica Gansu,2014,23(1):28-34. |
| |
| Authors: | WANG Qi-hang WANG Xiao-wei YANG Chun-xia GAO Xiang ZHAO Wei |
| |
| Institution: | 1. No. 3 Geology and Mineral Exploration Team, Gansu Provincial Bureau of Geology and Mineral Exploration and Development, Lanzhou 730050, China; 2. China University of Geosciences (Beijing), Beijing 100083, China) |
| |
| Abstract: | Northchina-type Mg-rich adakite was first discovered in Laohushan area of Jinta County, Gansu Province. It should be typical C-type adakite due to the geochemical features of high Sr, low Y, high K and Low Na, rich LREE and loss HREE, no or minor Eu anomaly and value of Mg#（0.56）. The authors suggested that the adakite formed from the mixing progress of the melt of thicken crustal basaltic magma, it may support that during Late Silurian Period, Beishan ancient oceans have disappeared, and Mingshui-Gongpoquan terrain collided and collaged with Mazongshan median mass. |
| |
| Keywords: | adakite tectonodynamics mineralization Late Paleozoic Laohushan Gansu |
| 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 |
|
