新疆三塘湖盆地晚古生代火山岩地球化学特征及构造环境

新疆三塘湖盆地晚古生代火山岩地球化学特征及构造环境

林克湘李艺斌龚文平俞惠隆

江汉石油学院

收稿日期:1997-06-20 修回日期:1997-06-20 出版日期:1997-06-20 发布日期:1997-06-20

GEOCHEMICAL CHARACTERISTICS OF UPPER PALAEOZOIC VOLCANIC ROCKS AND THEIR TECTONIC SETTINGS IN THE SANTANGHU BASIN, XINGJIANG

Lin Ke-xiang, Li Yi-bin, Gong Wen-ping, Yu Hui-long

Jianghan Petroleum Institute, Jingzhou, Hubei, 434102

Received:1997-06-20 Revised:1997-06-20 Online:1997-06-20 Published:1997-06-20

摘要/Abstract

摘要： 新疆三塘湖盆了的早石炭世玄武岩类岩石，具有Ａｌ２Ｏ３含量高，铁含量低，ＴｉＯ２含量低，大离子亲石元素及轻稀土元素富集的钙碱性系列特点，利用图式差别表明，该区在早石炭世入于岛弧的的构造环境，早二叠世安山岩的岩石化学特征，稀土元素和微量元素丰度具碱系列中的高钾造山安山岩特征，与安第斯活动大陆边缘安山岩的元素特征相似，证实三塘湖地区在早二叠世时期处于西伯亚利亚板块活动陆缘的构造环境。

Abstract: The geochemical analysis indicates that the Early Carboniferous basalts in the Santanghu basin are characterized by higher Al203, lower FeO, Fe: 03 and TiO2, and by high concentrations of large-ion lithophile element (LIL) and LREE, showing the characteristics of the calc-alkaline series. In addition, results of discriminant analysis show that the Santanghu area was in an island arc setting during Early Carboniferous. The petrochemical characteristics and REE and trace element abundance show that the andesites of Early Permian belong to high potassium orogenic andesites of calc-alkaline series, comparable with that of the Andes-type active continental margin, indicating that the Santanghu area was in the active continental margin of Siberia plate during Early Permian time.

林克湘李艺斌龚文平俞惠隆. 新疆三塘湖盆地晚古生代火山岩地球化学特征及构造环境[J]. J4.

Lin Ke-xiang, Li Yi-bin, Gong Wen-ping, Yu Hui-long . GEOCHEMICAL CHARACTERISTICS OF UPPER PALAEOZOIC VOLCANIC ROCKS AND THEIR TECTONIC SETTINGS IN THE SANTANGHU BASIN, XINGJIANG[J]. J4.