摘要
东南亚巽他群岛是新生代埃达克岩、类埃达克岩极其发育的地区。这些中酸性岩浆岩广泛见于几内亚岛上的中央山脉、巴布亚新几内亚的欧文-斯坦利推覆带、俾斯麦岛弧、布干维尔岛-所罗门岛弧、印度尼西亚苏拉威西、加里曼丹中部、班达岛弧,零星见于苏门答腊、爪哇等地。根据微量元素特征及REE曲线类型的特点,本区埃达克岩可以明显地划分为2种类型:第一种埃达克岩类型属于拉斑/钙-碱性系列,具有大洋岛弧的REE曲线特征(相当于O型埃达克岩);第二种埃达克岩属于高钾钙-碱性系列,归于大陆埃达克岩(相当于C型埃达克岩),形成于弧-陆碰撞带或碰撞后造山带。埃达克岩与浅成热液金属矿床和斑岩矿床的成矿作用有密切的关系,是世界级浅成热液和斑岩铜-金矿的容矿岩石。
Adakite and Adakite-like rocks are widespread and well-developed in Sunda Islands, Southeast Asia. These intermediateacid magmatic rocks widely occur within the Central Range of Guinea Island and Owen Stanley thrust belt, northern New GuineaBismarck island arc, Bougainville-Solomon island arc, Snlawesi （Indonesia）, Central Kalimantan, Banda island arc, as well as rare in Sumatra and western Java. Based on trace elements feature and REE curve type, the adakites and adakite-like rocks of Sunda Islands can obviously be divided into two types： the First one belongs to tholeiitic/calc-alkaline series with characterized R_EE curve of oceanic island arcs （O type-adakites）; the second one belongs to high potassium calc-alkaline series, which can be concluded into continental type （C type-adakites）, these rocks are located at arc-continent collision zone or postcollision orogenic zone. Adakites is considered to closely linked to mineralization of epithermal and porphyry deposits and is the host rocks for world-class epithermal and porphyry deposits.
出处
《地质通报》
CAS
CSCD
北大核心
2009年第2期333-342,共10页
Geological Bulletin of China
基金
中国地质调查局项目<中国大陆周边地区主要成矿带成矿规律对比及潜力评价>(编号:1212010661308)资助
