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新疆三塘湖盆地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,该区在早石炭世处于岛弧的构造环境。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钙碱系列中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利亚板块活动陆缘的构造环境。
The Early Carboniferous basalts in the Santanghu Basin, Xinjiang have the characteristics of Ca-Alkali series with high Al2O3 content, low iron content, low TiO2 content, large ion lithophile elements and light rare earth elements enrichment. The differences in the patterns indicate that the area was in the tectonic setting of the island arc in the Early Carboniferous. The petrochemical characteristics, REE and trace element abundances of the Early Permian andesite are characterized by the calc-alkali anomaly series of high-kanamorphic andesites, similar to the andesite features of the Andean continental margin. Confirmed the Santanghu area in the Early Permian tectonic setting in the Siberian plate land edge.