本文關(guān)鍵詞： 黃泥坑金礦 欽杭成礦帶 礦物生成序列 SEM-EDS 造山型金礦　出處：《中山大學(xué)學(xué)報(自然科學(xué)版)》2017年04期 　論文類型：期刊論文

【摘要】：黃泥坑金礦為近年在欽杭成礦帶南段廣寧-羅定斷裂帶內(nèi)新發(fā)現(xiàn)的金礦,基礎(chǔ)研究幾近空白。主要對黃泥坑金礦礦石和圍巖進行系統(tǒng)顯微巖相-礦相學(xué)研究,并結(jié)合SEM-EDS形貌和成分分析,查明其礦物生成序列,為限定其礦床成因提供證據(jù)。研究表明,黃泥坑含金石英脈型礦體產(chǎn)于綠片巖相變質(zhì)的寒武系水石組砂巖中,主要的圍巖蝕變?yōu)榫G泥石化、絹云母化和碳酸鹽化。主要礦石礦物包括銀金礦、毒砂、黃鐵礦、閃鋅礦、方鉛礦、黃銅礦、輝鉬礦和硫銻銅銀礦等,主要脈石礦物為石英、綠泥石、絹云母、碳酸鹽礦物、金紅石、磷灰石、鋯石和獨居石等。根據(jù)礦物相互穿插交代關(guān)系和化學(xué)成分差異識別出了4個主要成礦階段:(1)綠泥石-絹云母化階段;(2)黃鐵礦-毒砂-多金屬硫化物階段;(3)黃鐵礦-毒砂-銀金礦階段;(4)碳酸鹽化階段。其中銀金礦呈顆粒狀和裂隙狀產(chǎn)出于黃鐵礦和毒砂之間,主要出現(xiàn)在黃鐵礦-毒砂-銀金礦階段。黃泥坑金礦礦床地質(zhì)及礦物生成序列與造山型金礦一致,初步認為黃泥坑金礦為欽杭結(jié)合帶南段的一個典型的造山型金礦。
[Abstract]:The Huangjikeng gold deposit is a newly discovered gold deposit in the southern section of the Qinghang metallogenic belt in recent years. The basic research is almost blank. The systematic microfacies and mineralogy of the ore and surrounding rock of the Huangjikeng gold deposit are studied. In combination with the SEM-EDS morphology and composition analysis, the mineral formation sequence is identified, which provides evidence for defining the genesis of the deposit. The study shows that the Huangjikeng gold-bearing quartz vein type orebody occurs in the Cambrian water-bearing sandstone with greenschist facies metamorphism. The main ore minerals include silver gold ore, arsenopyrite, pyrite, sphalerite, galena, chalcopyrite, molybdenum and sulphide copper and silver, etc. The main gangue minerals are quartz. Chlorite, sericite, carbonate minerals, rutile, apatite, Zircon and monazite, etc. According to the intercalation metasomatism of minerals and the difference of chemical composition, four main metallogenic stages: 1) chlorite sericite stage and 2) pyrite-arsenopyrite-polymetallic sulphide stage (Xian3) pyrite have been identified. -arsenopyla-silver-gold deposit stage: carbonation stage, in which silver gold deposits occur in granular and fissured form between pyrite and arsenopyrite, The geological and mineralogical sequence of the Huangjikeng gold deposit is consistent with that of the orogenic gold deposit. It is preliminarily considered that the Huangjikeng gold deposit is a typical orogenic gold deposit in the southern section of the Qinghang joint belt.
【作者單位】： 中山大學(xué)地球科學(xué)與工程學(xué)院;廣東省海洋地質(zhì)調(diào)查院;
【基金】：科技部國家重點研發(fā)計劃(2016YFC0600506) 廣東省自然科學(xué)基金(2016A030310210) 國家自然科學(xué)基金(41502068和41402165) 廣州市“珠江科技新星”計劃(201710010027)
【分類號】：P618.51
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本文編號：1506664