摘要
黄泥岭岩体出露于华北板块北缘东段，自老至新（剔出中生代侵入岩后）可划为七个单元，归并为两个序列，两个独立单元。其中菜子序列和黄泥岭序列为岩体的主要组成部分，演化规律：由基性—中性—中酸性—酸性；稀土元素球粒陨石标准化图式由较平缓型向右倾型演化；结构由细粒—中粒—似斑状。岩体经历了同碰撞期—造山晚期演化阶段（Ｐｔ＿３—∈＿３）。呈两侧对称的北西向带状展布，老的在两侧，新的处中间。岩体的就位机制经历了热点—扩张—扩充三个阶段，颇具大洋中脊基性岩墙群依次向外扩张的特点，最终形成了具四期以上侵入活动的复式深成杂岩体。
The Huangnmng rock body outcropped on the eastern part of the northern margin ofNorth China platform,from young to new,(except for the Mcsozoic intrusive rocks)can bedivided 7 units,combining 2 series and 2 independent units,Among them,the Caoqiaiigzi se-ries and the Huangniling series are main parts of the rock body,showing the following evolu-tionary regularities,i.e. basic-intermediate-rnedium acid-acid;the trend of chondrite-normal-ized REE Pattern evolution is from gentle to right inclined type;the texture is fine-medium-porphyroid.The rock body underwent the evolution(P_(t3) ∈_3)from the synchronous cillision stageto late Orogenic period, showing NW banded distribution, with the symmetrical two sides;the old one is on both sides and the new one is in the center. The emplacement mechanism ofthe rock body underwent hot spot- spreading- expanding stages, having the spreading charac-teristics similar to the mid- oceanic ridge basic dike swarm i.e. finally,resulting in the forma-tion of colnpound plutonic complex body with more than 4 stages.
出处
《吉林地质》
1994年第4期41-49,7,共10页
Jilin Geology
关键词
黄泥岭
岩体
就位机制
板块
构造单元
The Huangniling rock body Unit Series Emplacement inechanismPlate Underthrust
