摘要
巴音布鲁克组主要分布于新疆西天山那拉提一带,构造上位于伊犁盆地南缘活动带,岩性主要为一套糜棱岩化、碎裂岩化中基性火山岩、正常沉积碎屑岩夹灰岩.火山岩岩石组合以碱性玄武岩-粗安岩-碱性流纹岩为主.岩石化学、地球化学特征表明,该组火山岩属碱性玄武岩系列大西洋型(钠质类型),具洋岛特征.说明当时的古南天山洋已拉张到相当规模.
Bayinbuluke formation was been mostly distributed in Lanati of western tianshan, The tectonic location at the Paleozoic active continental margin of southern Yili basin. The rock assemblages of the Bayinbuluke formation are mainly alkaline basalt-thick andesite- alkaline rhyolite. It belong series of the alkaline basalt, and have character of island ocean in geochemistry and petrochemistry. It demonstrate that the southern tianshan ocean is very widest then.
出处
《新疆地质》
CAS
CSCD
2006年第1期9-12,共4页
Xinjiang Geology
关键词
西天山
巴音布鲁克组
火山岩
洋岛
Western Tianshan
Bayinbuluke formation
volcanic rock
island ocean
