【作者】 胡艳华； 顾明光； 李建峰； 徐岩；

【Author】 HU Yan-hua;GU Ming-guang;LI Jian-feng;XU Yan;

【机构】 浙江省地质调查院； 中国科学院广州地球化学研究所；

【摘要】 对诸暨孝四地区加里东期混合岩化变质岩的变质温压条件进行了估算,估算结果显示,孝四地区陈蔡岩群的变质温度约645℃,变质压力约为5.1kbar。提出陈蔡岩群普遍发育的混合岩化现象是减压部分熔融的结果,研究区晚奥陶世到中志留世大规模的地壳抬升是造成陈蔡岩群普遍发育混合岩化的重要原因,很好的解释了陈蔡岩群中普遍发育的混合岩化现象,也对认识华南加里东运动的本质提供了新的视角。更多还原

【Abstract】 We have calculated the metamorphic temperature-pressure condition for the Caledonian magmatized metamorphic rocks from the Xiaosi area in the ZhuJi,Zhejiang.The results show that the metamorphic temperature and pressure for the Chencai group formation from the Xiaosi area are 645℃ and 5.1 kbar,respectively.Thus,we propose that the wide distribution of the magmatized metamorphic rocks were formed due to decompression melting,and the Late Ordovicia to middle Silurian large scale crustal uplift is considered to be the major factor of the magmatized metamoiphism,which could account for the magmatized metamoiphism of the Chencai Formation.This study provides new insight for the genesis of the Caledonian orogeny in South China.更多还原