绍兴──江山石英闪长岩金矿带元素地球化学规律的多元统计分析

ELEMENTARY GEOCHEMISTRY OF THE SHAOXING-JIANGSHAN GOLD BELT

多元统计分析结果表明，在江南、华夏古地体斜接遇合的古缝合线──绍兴─江山对接带中，同构造期Ｍ（Ⅰ）型石英问长岩，属于深源原生含金建造；其金矿带中Ａｕ与Ｃｄ，Ｃｕ，Ｚｎ，Ｈｇ，Ａｇ等２７种微量元素之间，有不同程度的相关关系。Ｃｄ与Ａｕ之间相关关系最为密切，成为Ａｕ的第一指示元素；Ｃｕ，Ｚｎ，Ｈｇ只能通过Ｃｄ影响Ａｕ含量变异，成为Ａｕ的第二指示元素。Ｃｄ对Ａｕ含量变异具有直接作用和间接作用。Ａｕ与相关元素组合特征显示深源成因因素。Ａｕ，Ａｇ相关元素组合特征之间的差异表示其成因径迹的不同。Ａｕ与Ｃｄ等２７种微量元素的相关关系，构成石英闪长岩原生含金建造金矿带中元素地球化学规律的独特性。

The study is limited to syntectonic quartz in the Shaoxin-Jiangshan suture zone which is the old suture line ofoblique conjunction of the Jiangnan old terrain and the Cathaynian one. The correlation has been found between An and the other27 trace elements in the gold zone of quartz diorite which belongs to plutonic primary formation. Cd has the closest relation withAn as the first indicator for the former. The second indicators are Cu, Zn and Hg. Deep-originated factors are confirmed by thecomprehensive characteristics of An and associated elements. Different cause paths are shown by disimilarity between associatedelements of An and Ag. The correlation of An with Cd or other 26 elements displays the distinct characteristics of elementarygeochemistry in the gold zone of quartz diorite.