新疆柯坪二叠纪层状玄武岩的发育特征及其地质意义DISTRIBUTION CHARACTERS OF PERMIAN BASALTS AND THEIR GEOLOGICAL SIGNIFICANCE IN THE KALPIN AREA,XINJIANG
余星,陈汉林,杨树锋,厉子龙,王清华,李兆恒
摘要(Abstract)：
通过野外实地测量和遥感影像识别,并对不同剖面的发育状况进行了对比。新疆柯坪地区发育的二叠纪玄武岩共可分为8层,包括库普库兹曼组2层和开派兹雷克组6层。多层玄武岩是多期喷发作用的结果,每次喷发可以来自不同的岩浆房或火山通道,但岩浆源区基本一致。每期喷发作用都具有一定的序列,先是稳定的熔岩流,发育柱状节理,往上则为致密块状玄武岩,在喷发末期发育火山角砾岩或凝灰岩。多期玄武岩浆喷发作用,指示了该区二叠纪玄武岩的岩浆房经历了"积聚—喷发—再积聚—再喷发"的过程,而熔融岩浆的源区则经历了不断"部分熔融"和"岩浆抽提"的过程。
关键词(KeyWords)： 发育特征;柯坪玄武岩;岩浆演化;地质意义;二叠纪;塔里木盆地;新疆
基金项目(Foundation): 国家自然科学基金重点项目(40930315);; 国家重点基础研究发展规划项目(2007CB411303)资助
作者(Author): 余星,陈汉林,杨树锋,厉子龙,王清华,李兆恒
DOI: 10.19839/j.cnki.dcxzz.2010.02.002
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