摘要
分布在尼勒克县喀什河北部一带的阿克塔什组火山岩归属博罗霍洛山地层小区.通过对该组火山岩的岩石学、岩石化学和元素地球化学研究,确认该火山岩为中性-酸性熔岩及同质凝灰岩,属钙碱性系列,且高钾富铝.其岩石化学及地球化学显示岛弧火山岩特征.综合分析,本区在中泥盆世处于汇聚板块一侧的岛弧及弧后盆地.阿克塔什组火山岩的构造环境信息为本区构造演化提供了重要佐证.
The Aketeshi Formation volcanic rocks of the Boluohuoluo stratigraphic group outcrop on the north side of the Kashi River in Nileke County in Xinjiang. Detailed studies of the petrography, petrochemistry and geochemistry, indicate these volcanic rocks have high contents of aluminum and potassium and are intermediate to acid lavas and homoplasmic tufts. The volcanic rocks belong to the cal-alkaline series and petrochemistry and geochemistry show characteristics of island arc volcanic rocks. This area was in an arc and rear-arc basin on convergent plates in the Middle Devonian. The tectonic ：environment of the Aktashi Formation volcanic rocks offers important evidence for the tectonic evolution of this area.
出处
《新疆地质》
CAS
CSCD
2006年第1期4-8,共5页
Xinjiang Geology
基金
新疆地质矿产局"新疆新源县托库孜库马拉克一带1:5万区域地质矿产调查"项目(XJQDW2003-07)资助
关键词
新疆
尼勒克县
火山岩
成因及构造环境
阿克塔什组
Xinjiang
Nileke County
Volcanic rock
Petrogenesis and tectonic environment
Aketashi formation
