钦-杭古板块结合带与成矿带的主要特征

CHARACTERISTICS OF GEOLOGY AND METATLLIZATION IN THE QINZHOU-HANGZHOU PALEOPLATE JUNCTURE

综合分析区域地质、地球物理资料,结合江西中部混杂岩带研究的新进展以及深源同熔型中酸性斑岩与有关矿床分布特征,认为钦州湾至杭州湾为扬子古板块与华夏古板块的结合带(简称钦-杭结合带).该带四堡-加里东期为一复合型碰撞混杂岩带,中生代时成为华南燕山运动的策源地,发生强烈挤压,是中国东南部最重要的岩浆成矿带之一.

The juncture between the Yangtze Paleoplate and the Cathaysian Paleoplate extends from Qinzhou Bay to Hangzhou Bay, called 'Qinzhou-Hangzhou juncture' for short. During the Sibao-Caledonian time the juncture became a compound collision melange belt; in the Mesozoic era it became source of Yanshanian movement in southern China, with intense compression. It has become one of the most important magmatic-metallogenic belts in the southeast China. Its metallization has characteristics of the multiple overprint and multiple sources melange, especially plutonic syn-tectonic intermediate-acidic porphyry.