下庄北部长英质火山岩地球化学特征及成因  

Geochemical Characteristics and Genesis of Felsic Volcanic Rocks in the North of Xiazhuang

作　　者：刘帅[1] 巫建华[1] 周维勋[1] 

机构地区：[1]东华理工学院,江西抚州市344000

出　　处：《矿业研究与开发》2007年第2期1-5,共5页Mining Research and Development

基　　金：国家自然科学基金项目(40642010);核工业总公司重点攻关项目资助(Y1218960401)

摘　　要：分析测定了下庄铀矿田北部中生代长英质火山岩主元素、微量元素、稀土元素,得出结论:下庄矿田北部中生代长英质火山岩由钙碱性系列碎斑熔岩组成;下庄矿田北部中生代长英质火山岩经历了不同程度的斜长石分离结晶作用或在部分熔融过程中斜长石残留的比例不同,物质来源于上地壳,是较高水逸度、较低温度条件下变质沉积岩部分熔融的产物。The major elements, trace elements, REE elements on the felsic volcanic rocks of late Mesozoic in the north of Xiazhuang uranium ore field were tested and analyzed, a conclusion was drew： the Mesozoic felsic volcanic rocks consisted of porphyroclastie lava of eale - alkaline rock series in the north of Xiazhuang uranium ore field; the Mesozoic felsie volcanic rocks experienced different separate crystallization or the plagioclase rudimental ratios is different during partial melt in the north of Xiazhuang uranium ore field, the substance of the felsie volcanic rocks was from the upper earth crust, and it maybe a production of partial malting of metamorphic sedimentary rocks under lower temperature and higher water fugacity condition.

关 键 词：长英质火山岩 中生代 地球化学特征 成因 下庄铀矿田 

分 类 号：P618.130.1[天文地球—矿床学]