Geological evolution and ore-prospecting targets in southern segment of Qinzhou Bay-Hangzhou Bay juncture orogenic belt,southern China
Geological evolution and ore-prospecting targets in southern segment of Qinzhou Bay-Hangzhou Bay juncture orogenic belt,southern China
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发表时间：
2012
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通讯作者：
Liangxu Jin
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作者：
Liangxu Jin
钦州湾（Q）-杭州湾（H）交界造山带是华南地区长江地块与华夏地块的一条巨大缝合带，根据地质变化可分为北、中、南三段，大致以北纬24°和27°为界。中段与传统的南岭带一致，北段与南岭带大致重合。绍兴-江山-凭祥地区，南段与云开-十万大山山地带一致。Q-H联合造山带南段是研究华南陆壳改造和找矿的重要课题之一，在地质演化上与整个交界造山带重合。云开地区大江坪新元古代块状硫化物矿床和新沂、陆川地区蛇绿岩矿床是古老海洋存在的直接证据。研究区今后的矿产资源勘查应重点关注斑岩铜矿。这些矿床赋存于花岗斑岩中，起源于元古界洋板块俯冲作用的岛弧玄武岩的部分熔融。
The Qinzhou Bay(Q)-Hangzhou Bay(H) juncture orogenic belt is a giant suture separating Yangzi block from Cathaysian block in South China.It can be divided into three segments,i.e.,the northern,the middle and the southern on the basis of the geological variation,separated roughly by the 24° and 27° north latitude.The middle segment is in accordance with the traditional Nanling belt,the northern segment is roughly coincident with the Shaoxing-Jiangshan-Pingxiang zone,and the southern segment is consistent with Yunkai-Shiwandashan Mountainous zone.The southern segment of the Q-H joint orogenic belt is one of the most important topics in studying reworking of the continental crust and mineral prospecting in South China.It is coincident with the whole juncture orogenic belt in geological evolution.The Neoproterozoic massive sulfide deposits occurring at Dajiangping and ophiolite at Xinyi and Luchuan of Yunkai area are direct evidence for existence of an old ocean.More attention should be paid to porphyry copper deposits in future mineral resource prospecting in the study area.These ore deposits are hosted in granitic porphyry which originated from partial melting of the island-arc basaltic rocks associated with subduction of the Proterozoic oceanic plate.