| 张家口地区张家口组火山岩元素地球化学特征及成因 |
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| 引用本文： | 汪洋,程素华.张家口地区张家口组火山岩元素地球化学特征及成因[J].矿物岩石,2010,30(1). |
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| 作者姓名： | 汪洋 程素华 |
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| 作者单位： | 1. 中国地质大学地质过程与矿产资源国家重点实验室,北京,100083;中国地质大学(北京)岩石矿物教研室,北京,100083
2. 中国地质大学(北京)岩石矿物教研室,北京,100083 |
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| 基金项目： | 国家自然科学基金项目(90814006,40972125,40376013,40104003) |
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| 摘 要： | 针对张家口该地区张家口组火山岩的主量元素和微量元素高精度分析测试,结果显示:该套流纹岩和粗面岩具有富铁,高钾和全碱,富集REE,Rb,Th,U,Zr,Ga等不相容元素,Nb,Ta相对LREE亏损的特点;低分异样品不具有明显负Eu异常。张家口地区张家口组长英质火山岩的元素地球化学特征与还原型A型花岗岩相似,是华北克拉通拉斑质基性下地壳在高温、低氧逸度和低水逸度条件下的部分熔融产物,形成于碰撞后构造背景。
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| 关 键 词： | 火山岩 地球化学 岩石成因 张家口组 燕山 张家口地区 |
ELEMENT GEOCHEMISTRY AND PETROGENESIS OF THE VOLCANIC ROCKS OF ZHANGJIAKOU FORMATION IN THE ZHANGJIAKOU AREA, NORTH CHINA |
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| WANG Yang,CHENG Su-hua.ELEMENT GEOCHEMISTRY AND PETROGENESIS OF THE VOLCANIC ROCKS OF ZHANGJIAKOU FORMATION IN THE ZHANGJIAKOU AREA, NORTH CHINA[J].Journal of Mineralogy and Petrology,2010,30(1). |
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| Authors: | WANG Yang CHENG Su-hua |
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| Abstract: | The Zhangjiakou Formation of Early Cretaceous exposed in Zhangjiakou area,North China,is mainly composed of rhyolite and trachyte.Previous researches were mainly focused on the stratigraphy correlation and geochronology,but paid no attention to the geochemistry of these volcanic rocks,especially did not touched the data of high-precise trace elements.For understanding the volcanic series,petrogenetic regime and regional tectonic setting of Zhangjiakou volcanic rocks,the high-precise analysis of major and tr... |
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| Keywords: | Volcanic rock geochemistry petrogenesis Zhangjiakou Formation Yanshan Zhangjiakou Area |
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