(1. 中南大學(xué) 有色金屬成礦預(yù)測教育部重點實驗室，長沙 410083；
2. 中南大學(xué) 地球科學(xué)與信息物理學(xué)院，長沙 410083)
摘 要: 安溝鉬礦產(chǎn)于東秦嶺鉬成礦帶燕山期花崗巖與花崗斑巖發(fā)育處。采用系統(tǒng)的地質(zhì)勘測手段與微量元素特征分析方法對礦床的地質(zhì)特征和礦床成因進(jìn)行研究。結(jié)果表明：區(qū)內(nèi)花崗類巖體w(Rb)/w(Sr)值較低，說明該巖漿來源較深；地層與巖體中Mo元素含量遠(yuǎn)高于平均值，在礦體周邊巖體的Mo含量極低，說明巖漿與熱液之間存在強(qiáng)烈的萃取作用；Pb與Au和Ag在成因上呈正相關(guān)，鉬礦與其他元素成礦關(guān)系不明顯；礦床為斑巖−爆破角礫巖型，成礦過程可歸納為中生代拆離斷層體系形成、巖漿侵位與礦質(zhì)元素萃取、超淺成侵位與爆破作用及熱液成礦4個階段。
關(guān)鍵字: 安溝；爆破角礫巖；微量元素；地質(zhì)特征；礦床成因
polymetallic deposit, Songxian, Henan Province, China
（1. Key Laboratory of Metallogenic Prediction of Nonferrous Metals, Ministry of Education,
Central South University, Changsha 410083, China;
2. School of Geosciences and Info-Physics, Central South University, Changsha 410083, China）
Abstract:Angou molybdenum deposit is located in the molybdenum ore belt in East Qinling, where Yanshanian granite and granite porphyry are exposed. Systematic geological survey and trace element analysis were used to identify the geological features and genetic type of the deposit. The results show that the low w(Rb)/w(Sr) ratios of the granite-like rock indicate the deep source of magma, the molybdenum content of the stratigraphy and igneous rock is much higher than the average, the very low molybdenum content around the ore body indicates that extraction of magma and hydrothermal effects is strong. Pb is positively correlated with Au and Ag. The relationship between mineralization of molybdenum and other elements is not obvious, Angou molybdenum deposit is defined as a porphyry-blasting breccias type deposit. Ore-forming processes can be summarized as the formation of the detachment fault system in mesozoic, magma emplacement and mineral extraction, ultra-shallow emplacement and blasting and hydrothermal mineralization.
Key words: Angou; explosion breccia; trace elements; geological characteristics; deposit genesis
