本文選題：金及多金屬礦床 + 地質(zhì)特征�。� 參考：《吉林大學(xué)》2015年碩士論文

【摘要】：雙橋子地區(qū)位于黑龍江省穆棱市東南約50km,地處太平嶺金、銅多金屬成礦帶的北段。大地構(gòu)造位置處于太平嶺隆起與老黑山斷陷兩大構(gòu)造單元的銜接部位,金廠-綏陽斷裂帶的北端,研究區(qū)出露地層主要有上元古界黃松群閻王殿組,古生界二疊系下統(tǒng)平陽鎮(zhèn)組、雙橋子組,中生界三疊系上統(tǒng)羅圈站組和侏羅系下統(tǒng)綏芬河組以及新生界第三系中新統(tǒng)船底山組。侵入巖從晚二疊世-晚白堊世均有分布,以燕山期花崗巖、花崗閃長巖、二長花崗巖為主,且對區(qū)內(nèi)金、銅多金屬成礦有重要控制作用。研究區(qū)金及多金屬礦床、礦點(diǎn)較多,主要有金廠金礦、八號(hào)硐角礫巖筒型金礦、半截溝、松樹砬子金礦、綏陽西崴子金銀礦點(diǎn)、孔雀臺(tái)金鋅礦點(diǎn)、陸角嶺金礦點(diǎn)、洋灰洞子銅礦等。由于區(qū)內(nèi)的特殊地層、構(gòu)造環(huán)境及相關(guān)的巖漿活動(dòng),為本區(qū)金、銅多金屬礦床的形成提供了有利的條件。研究區(qū)內(nèi)發(fā)育的礦床主要是陸角嶺金礦床和洋灰洞子銅鉬多金屬礦床,本文以陸角嶺金礦床為典型礦床。該礦床位于研究區(qū)的東南部,地處1:5萬水系沉積物測量Hs 4號(hào)異常內(nèi)。礦區(qū)內(nèi)出露的地層為上元古界黃松群閻王殿組(Pt3yn)和三疊系上統(tǒng)羅圈站組(T3l);侵入巖為晚三疊-早侏羅世花崗閃長巖(T3J1γδ)、早白堊世二長花崗巖(K1ηγ)以及后期細(xì)粒閃長巖脈、石英脈等;構(gòu)造以北東向斷裂為主,北西向斷裂次之。礦區(qū)內(nèi)共圈定出4條礦化蝕變破碎帶I-IV,在該帶中分別發(fā)現(xiàn)2條金工業(yè)礦體、1條鉛鋅工業(yè)礦體、6條金非工業(yè)礦體、1條鉛鋅銀非工業(yè)礦體、12條金礦化體、1條鉛鋅礦化體,礦床成因類型推斷為變質(zhì)~熱液型金礦。根據(jù)區(qū)域1:5萬水系沉積物測量成果,對比陸角嶺金礦床和洋灰洞子銅鉬多金屬礦床的成礦特征,在研究區(qū)圈定成礦預(yù)測區(qū)2處,預(yù)測區(qū)的成礦地質(zhì)特征與鄰區(qū)的陸角嶺金礦床類比,成礦地質(zhì)條件相同,同樣是尋找金多金屬礦的有利地段。根據(jù)各預(yù)測區(qū)的成礦地質(zhì)背景、次生暈異常特征、高磁異常特征和激電異常情況對其找礦潛力進(jìn)行了評(píng)價(jià)。研究認(rèn)為雙橋子地區(qū)的金多金屬成礦預(yù)測區(qū)(I區(qū)和II區(qū))內(nèi)出露地層主要是上元古界黃松群閻王殿組地層為區(qū)內(nèi)的主要含礦層,受北東向斷裂構(gòu)造控制明顯,晚二疊世花崗閃長巖的侵入為本區(qū)礦化蝕變提供了熱源,形成一條硅化、黃鐵礦化、泥化(高嶺土化)帶,并發(fā)現(xiàn)有多處土壤異常和物探異常分布在閻王殿組地層中。通過對研究區(qū)和陸角嶺礦床地質(zhì)條件和找礦標(biāo)志的研究結(jié)果表明,兩區(qū)同處在1:5萬水系沉積物異常內(nèi),并有相似的地層、構(gòu)造、侵入巖條件和物化探異常。所以研究區(qū)具有較好的進(jìn)一步找礦潛力,具有尋找金多金屬礦床的良好前景,是尋找變質(zhì)~熱液型金礦床的有望地段。
[Abstract]:Shuangqiao area is located about 50 km southeast of Muling City, Heilongjiang Province, and is located in the northern section of the Taiping Gold and Copper Polymetallic metallogenic Belt. The tectonic position is located at the junction of the two tectonic units of the Taiping Ridge uplift and the Laoheishan fault depression, and the northern end of the Jinchang-Suiyang fault zone. The exposed strata in the study area are mainly the Yan-wangdian formation of the Huangsong Group of the Upper Proterozoic. Paleozoic Lower Permian Pingyangzhen formation, Shuangqiao formation, Mesozoic Triassic Upper Permian Luoquan Station formation, Jurassic Lower Series Suifenhe formation and Cenozoic Tertiary Miocene Chuandieshan formation. The intrusive rocks were distributed from the late Permian to the late Cretaceous, with the Yanshanian granite, granodiorite and monzomorphic granodiorite as the main ones, and they played an important role in controlling the gold and copper polymetallic mineralization in the area. There are many gold and polymetallic deposits in the study area, including the Jinchang gold deposit, the No.8 Dongdong breccia tube gold deposit, the Tongjiaogou gold deposit, the Songshulazi gold deposit, the Suiyang Xiweizi gold-silver deposit, the Kongcantai gold-zinc deposit, the Lujiaoling gold deposit, Yanglidongzi Copper Mine, etc. Because of the special strata, tectonic environment and related magmatic activities, the formation of gold and copper polymetallic deposits in this area is favorable. The deposits developed in the study area are mainly Lujiaoling gold deposit and Yangzhitongzi copper-molybdenum polymetallic deposit. The Lujiaoling gold deposit is a typical deposit in this paper. The deposit is located in the southeast of the study area. The strata exposed in the mining area are the Upper Proterozoic Huangsong Group Yanwangdian formation (Pt3ynn) and the Triassic Upper Permian Luoquan Station formation (T _ 3lhe), the intrusive rocks are the late Triassic-early Jurassic granodiorite (T _ 3J _ 1 緯 未), the early Cretaceous granodiorite K _ (1 畏 緯) and the late fine-grained diorite and quartz veins. The main fault is N E trending fault, followed by N W trending fault. A total of 4 mineralization altered and broken zones I-IVwere delineated in the mining area. In this zone, 2 gold industrial bodies, 1 lead and zinc industrial ore bodies, 1 lead, zinc and silver non industrial ore bodies, 1 lead zinc orebody, 1 lead zinc ore body, 1 lead zinc ore body, The genetic types of the deposits are deduced to be metamorphic-hydrothermal gold deposits. Based on the results of regional sediment survey of 1: 50 000 water system, the metallogenic characteristics of Lujiaoling gold deposit and Yangshidongzi copper-molybdenum polymetallic deposit are compared, and 2 metallogenic prediction areas are delineated in the study area. The metallogenic geological characteristics of the prediction area are similar to those of the Lujiaoling gold deposit in the adjacent area. The metallogenic geological conditions are the same, and the metallogenic geological conditions are also favorable for the prospecting of gold polymetallic deposits. According to the metallogenic geological background, the characteristics of secondary halo anomaly, high magnetic anomaly and induced electric anomaly, the prospecting potential is evaluated. It is considered that the exposed strata in the gold polymetallic metallogenic prediction areas of Shuangqiao area are mainly the strata of the Upper Proterozoic Huangsong Group Yanwangdian formation, which are obviously controlled by the NNE fault structure. The intrusion of granodiorite from late Permian provides a heat source for mineralization alteration in this area, forming a silicification, pyrite, mud (kaolin) zone, and it is found that there are many soil anomalies and geophysical anomalies distributed in the strata of Yanwangdian formation. The results of the study on geological conditions and ore-prospecting indicators of the study area and Lujiaoling deposit show that the two areas are both located within the sediment anomaly of 1: 50 000 water system and have similar stratigraphic, structural, intrusive rock conditions and geophysical and geochemical anomalies. Therefore, the study area has a good potential for further prospecting, a good prospect for prospecting for gold polymetallic deposits, and is a promising area for the prospecting of metamorphic ~ hydrothermal gold deposits.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.51

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