摘要
冶父山岩体主体岩性为石英正长斑岩。岩体富碱， 尤其富钠， 贫钙、镁、铁。其铜、铅、锌、金等成矿元素的初始富集现象不明显。岩石的稀土总量很低， 轻、重稀土分馏显著，并具中－ 强的铕负异常。岩体中发育石英网脉，其网脉石英包裹体气、液相成分具富 Ｃ Ｏ、 Ｎａ＋ 、 Ｃａ２＋ 等特点。根据对上述特征的综合分析， 同时在与铜、金矿化有关岩体特征广泛对比的基础上， 指出冶父山岩体缺乏铜、金成矿的有利条件，找矿工作的重点应多着眼于岩体周围的其他地质体， 而不应当局限于岩体本身。
The Yefushan rock mass is mainly composed of quartz syenite porphyry. Chemically, this rock mass is rich in alkali, especially in Na, and poor in Ca,Mg and Fe. Its abundances of minerogenic elements, such as Cu, Pb, Zn and Au are relatively low and dont exhibit obviously initial enrichment. Rocks in Yefushan have lower ΣREE values and higher LREE/HREE ratios, and display middle to strong negative Eu anomaly. Stockwork quartz vein are much developed in this rock mass. The gas liquid compositions of fluid inclusions from these quartz vein are characterized by rich in CO, Na + and Ca 2+ . By integrating these features mentioned above comprehensively, and by comparison them with those igneous rocks which are closely related to Cu, Au mineralization, this paper concludes that the Yefushan quartz syenite porphyry lacks favorable conditions for Cu, Au mineralization. The prospecting emphasis should be placed on other surrounding geologic bodies rather than on the igneous rock mass itself.
出处
《黄金地质》
1999年第3期64-68,共5页
Gold Geology
基金
国家自然科学基金
关键词
石英正长斑岩
地球化学
包裹体
含矿性
成矿元素
quartz syenite porphyry, geochemistry, fluid inclusion, ore potential,Anhui
