摘要
烟塘岩体位于海南岛东部,岩石化学成分上具高Si富K,贫Na,Fe和Mg等特点,属壳源过铝质岩浆成因侵入花岗岩。研究表明,烟塘岩体的源岩主要是海南岛结晶基底抱板群变质火山岩和砂泥质变沉积岩,其形成主要与岩石圈汇聚、挤压碰撞、陆壳加厚有关,可能是古特提斯洋闭合、琼北与琼中两大地块之间"挤压-碰撞-陆壳加厚"这一深部构造作用的浅部响应。
Located in east Hainan island,the Yantang granite body is petrochemically characteristi- zed by rich in Si and K,poor in Na,Fe and Mg,and was derived from super-aluminum magma generated in the crust through partial melting of metamorphic volcanic rocks and sedimentary rocks of the basement-the Baoban group. Study shows that the granitic body might be mainly related to close of Paleo-Tethys ocean and thickening of the continental crust.
出处
《华南地质与矿产》
CAS
2004年第2期40-45,共6页
Geology and Mineral Resources of South China
基金
中国地调局地质调查项目(200113000041).
关键词
岩石成因
烟塘岩体
海南岛东部
petrogensis
Yantang granite
eastern Hainan island
