(1. 中南大學(xué) 有色金屬成礦預(yù)測(cè)教育部重點(diǎn)實(shí)驗(yàn)室，長(zhǎng)沙 410083；
2. 中南大學(xué) 地球科學(xué)與信息物理學(xué)院，長(zhǎng)沙 410083；
3. 北京礦產(chǎn)地質(zhì)研究院，北京 100012)
摘 要: 南嶺中段諸廣山復(fù)式巖體是地洼激烈期(燕山期)花崗質(zhì)巖漿多次侵入產(chǎn)物。燕山早期主體與燕山晚期補(bǔ)體分別形成于地洼演化劇烈期的前半期和后半期，為古元古代陸殼物質(zhì)批式部分熔融的產(chǎn)物，但它們動(dòng)力學(xué)環(huán)境、演化過(guò)程及控礦作用差異明顯。選擇仁化縣城口—紅山地區(qū)為重點(diǎn)研究地段，基于地洼學(xué)說(shuō)研究方法，通過(guò)現(xiàn)場(chǎng)地質(zhì)調(diào)查、巖相學(xué)、巖石地球化學(xué)研究，就諸廣山燕山早期主體及燕山晚期補(bǔ)體成巖構(gòu)造環(huán)境、巖石學(xué)及控礦作用進(jìn)行較詳細(xì)的研究。結(jié)果表明，兩期次花崗巖隨構(gòu)造動(dòng)力環(huán)境演化，表現(xiàn)出不同的巖石學(xué)和地球化學(xué)特征，巖體含礦性及控礦性也有差異。燕山早期花崗巖產(chǎn)生于巖石圈膨脹伸展環(huán)境，以高硅、富堿、w(K2O)＞w(Na2O)、準(zhǔn)鋁質(zhì)、∑REE含量高為特征，成巖物質(zhì)主要來(lái)源于元古代陸殼，且有幔源巖漿的混入，屬A型花崗巖，與Pb-Zn-Sb-Ag礦化有關(guān)；燕山晚期花崗巖產(chǎn)生于巖石圈拉張減薄環(huán)境，為鈣堿性，過(guò)鋁質(zhì)，貧Ba、Sr和Eu，屬S型花崗巖，經(jīng)歷了高度分異演化和巖漿-流體相互作用過(guò)程，是W-Sn-Mo-(Bi)礦床的成礦母巖。
關(guān)鍵字: 花崗巖；巖石學(xué)；地球化學(xué)；構(gòu)造環(huán)境；控礦作用；諸廣山
（1. Key Laboratory of Metallogenic Prediction of Nonferrous Metals, Ministry of Education,
Central South University, Changsha 410083, China;
2. School of Geoscience and Info-Physics, Central South University, Changsha 410083, China;
3. Beijing Institute of Geology for Mineral Resources, Beijing 100012, China）
Abstract:Zhuguangshan composite granitic pluton in the middle section of Nanling region is the intrusive product of poly-stage granitic magma in the intensive activation period (Yanshanian period) of Diwa stage. The main body intruded in the first half intensive reactivation period of Diwa stage (the early Yanshanian period), while the supplementary bodies intruded in the second half intensive reactivation period of Diwa stage (later Yanshanian stage). The main body and the complementary bodies were produced by batch partial melting of the co-source magmatic materials derived from Paleoproterozoic continental crust. The main body and the supplementary bodies suffered different geodynamic settings and evolution paths, and showed different ore-control characteristics. Chengkou—Hongshan area in Renhua county, Guangdong Province, was focused on. Through detailed field study, petrography and rock geochemistry, the generating geodynamic settings, petrology and ore-controlling of the main body and the supplementary bodies in Yanshanian periods were investigated according to the research methodology of Diwa theory. The results show that, with the evolution of tectonic dynamic environment, these granite bodies show different characteristics on petrologic, rock geochemistry, ore-bearing potential and ore-controlling. The main body is generated in the regional expansion spreading environment and its rock-forming materials are mainly derived from the Paleoproterozoic crust and also contaminated by mantle materials, which show the characteristics of A-type granite with high silicon and alkaline contents, w(K2O)＞w(Na2O), quasi-aluminous property as well as REE enrichment. So, it is related to Pb-Zn-Sb-Ag mineralization. In contrast, the complementary bodies are generated in strong extension thinning environment, and experience the process of high degree differentiation and the interaction between magma and post-magmatic fluid, showing the characteristic of S-type granite with calc-alkaline and per-aluminous property, remarkable Ba, Sr and Eu depletion. So, they are the original source of W-Sn-Mo(Bi) mineralization.
Key words: granite; petrology; geochemistry; tectonic setting; ore-controlling; Zhuguangshan
