CAJ | 학술논문

南岭地区,尤其是赣南粤北地区,以富产钨锡钼铋等有色金属矿床著称,贵金属不是很发育,特别是金矿床不多,但南岭周边地区金矿不少。究竟是什么原因,导致这两类金属矿的空间产出差异？这一问题日益引起重视。本文初步总结了南岭地区与金矿具有较明显成因联系的岩浆岩的地质特征及地球化学特点,并与成钨锡矿岩浆岩进行了初步对比,探讨了该类岩浆岩的起源特征。研究表明,与金成矿有关的岩浆岩一般为浅成的中性、中酸性岩,通常呈岩株、岩筒或岩脉产出。在地球化学特征上, SiO2含量较低,变化在51.42%~68.59%之间,具有低分异特点；全碱含量较低, K2O+Na2O一般＜7%, K2O>Na2O, A/CNK值较小,一般为准铝-弱过铝质高钾钙碱性系列岩石；高CaO、MgO、FeO+Fe2O3、TiO2。以富集亲铁元素和亏损Nb、Ta、Ba、Sr、Ti、P等元素为特征；LREE/HREE比值大；Eu亏损不强烈或略有亏损。上述特征显示,与金矿有关岩浆岩和与钨锡矿有关岩浆岩明显不同,其在起源方面具有多来源的特点,壳幔相互作用明显,多来源多演化可能正是其成金的重要条件。
남령지구,우기시공남월북지구,이부산오석목필등유색금속광상저칭,귀금속불시흔발육,특별시금광상불다,단남령주변지구금광불소。구경시십요원인,도치저량류금속광적공간산출차이？저일문제일익인기중시。본문초보총결료남령지구여금광구유교명현성인련계적암장암적지질특정급지구화학특점,병여성오석광암장암진행료초보대비,탐토료해류암장암적기원특정。연구표명,여금성광유관적암장암일반위천성적중성、중산성암,통상정암주、암통혹암맥산출。재지구화학특정상, SiO2함량교저,변화재51.42%~68.59%지간,구유저분이특점；전감함량교저, K2O+Na2O일반＜7%, K2O>Na2O, A/CNK치교소,일반위준려-약과려질고갑개감성계렬암석；고CaO、MgO、FeO+Fe2O3、TiO2。이부집친철원소화우손Nb、Ta、Ba、Sr、Ti、P등원소위특정；LREE/HREE비치대；Eu우손불강렬혹략유우손。상술특정현시,여금광유관암장암화여오석광유관암장암명현불동,기재기원방면구유다래원적특점,각만상호작용명현,다래원다연화가능정시기성금적중요조건。
The Nanling region in South China is one of the most important nonferrous producing districts in the world, where the noble metals (especially gold) deposits are not common. However, there are lots of gold deposits in areas adjacent to the Nanling region. What factors caused the regional difference in nonferrous and noble metals deposits distribution? Focus on the relationship between gold deposits and magmatic rocks, this paper summarizes the geological and geochemical characteristics of the magmatic rocks and makes a preliminary comparison with the magmatic rocks associated with tungsten-tin deposits. The study indicates that the rocks associated with gold deposits are intermediate and intermediate-acidic, hypabyssal, usually in the forms of stocks, dikes, and rock pipes. And the rocks are characterized by low SiO2 (51.42%-68.59%), and low magmatic differentiation (DI<88). These rocks have low alkali (K2O+Na2O<7%, K2O>Na2O) and belong to high-K calc-alkaline series, metaluminous to peraluminous. Additionally, the rocks are enriched in CaO, MgO, FeO+Fe2O3, TiO2 and some siderophile elements, depleted in Nb、Ta、Ba、Sr、Ti and P. The rocks are characterized by relatively enriched in LREE with negative or weakly negative Eu anomalies. Apparently, the geochemical characteristics of the magmatic rocks associated with gold deposits are different from those of the rocks associated with tungsten-tin deposits. It is reasonable to suggest that the magmatic rocks associated with gold deposits are multiple sources with crust-mantle interaction.