| 藏北沉鱼湖-向阳湖一带石坪顶组火山岩特征、形成时代及环境 |
| |
| 引用本文： | 刘荣,吕金刚,吴新忠.藏北沉鱼湖-向阳湖一带石坪顶组火山岩特征、形成时代及环境[J].新疆地质,2006,24(2):109-114. |
| |
| 作者姓名： | 刘荣 吕金刚 吴新忠 |
| |
| 作者单位： | 1. 新疆地质调查院第一地质调查所,新疆,乌鲁木齐,830011
2. 新疆地质调查院第四地质调查所,新疆,昌吉,830011 |
| |
| 基金项目： | 国土资源大调查项目(200313000004)资助.西藏1∶25万玛尔盖茶卡幅(I45C001002)、玉帽山幅(I45C001003)、岗扎日幅(I45C001004)地调项目成果 |
| |
| 摘 要： | 沉鱼湖—向阳湖一带的石坪顶组火山岩大地构造位置属巴颜喀拉-可可西里地块和南部的若拉岗日裂谷带,岩石结构类型比较简单,以粗面安山岩为主,粗面岩、玄武粗安岩、粗面英安岩次之,以钾质太平洋型钙碱性系列为主.火山岩轻、重稀土分馏程度均较高,重稀土分馏程度比轻稀土稍低一些,具轻稀土富集,重稀土亏损的特点,时代属中新世.K2O/Na2O>1,说明成矿物质为深部幔源物质混合了壳源物质,属大陆板内造山晚期演化的火山岩类型.
|
| 关 键 词： | 藏北 沉鱼湖—向阳湖 石坪顶组火山岩 形成时代及环境 |
| 文章编号： | 1000-8845(2006)02-109-06 |
| 收稿时间： | 10 9 2005 12:00AM |
| 修稿时间： | 11 23 2005 12:00AM |
TIME AND ENVIRONMENT OF FORMATION AND GEOCHEMICAL CHARACTERISTICS OF THE CHENYUHU TO XIANGYANGHU SHIPINGDING GROUP VOLCANIC ROCKS IN NORTHERN TIBET |
| |
| LIU Rong,LU Jing-gang,WU Xing-zhong.TIME AND ENVIRONMENT OF FORMATION AND GEOCHEMICAL CHARACTERISTICS OF THE CHENYUHU TO XIANGYANGHU SHIPINGDING GROUP VOLCANIC ROCKS IN NORTHERN TIBET[J].Xinjiang Geology,2006,24(2):109-114. |
| |
| Authors: | LIU Rong LU Jing-gang WU Xing-zhong |
| |
| Institution: | 1.No. 1 Geological Survey Institute of Xinjiang Geological Survey Academy, Urumqi, Xinjiang, 830011, China; 2. No. 4 Geological Survey Institute of Xinjiang Geological Survey Academy, Changji, Xinjiang, 830011, China |
| |
| Abstract: | The Chenyuhu to Xiangyanghu Shipingding group volcanic rocks are located north of the Hoh Xil Mountains-Bayan Har massif and south of the Ruolagangri Rift Valley Belt. Rock types are simple: trachyandensite, the trachyte, basalt-trachyte, trachyandensite and are typical of the Pacific Ocean calcium alkali series. The volcanic rock is light; the degree of heavy rare earth fractionation is all high and compared to the light rare earth is slightly lower; has light rare earth concentrates and; the heavy rare earth loses are characteristic. The age is Miocene Epoch. K2O/Na2O is greater than 1 and the ore forming material consists of deep seated mantle derived material mixed with crust-derived material. The volcanic rocks formed and evolved during continent intraplate orogeny. |
| |
| Keywords: | Chenyuhu to Xiangyanghu Shipingding group volcanic rock formation environment |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
