本文選題：豫西　切入點：南泥湖　出處：《中國地質大學(北京)》2015年碩士論文

【摘要】：豫西地區(qū),是東秦嶺鉬礦帶的重要組成部分。南泥湖鉬多金屬礦田位于豫西洛陽市欒川縣南部的冷水鎮(zhèn)境內,在成礦帶劃分上位于華北(陸塊)成礦省華北陸塊南緣成礦帶之小秦嶺—豫西成礦亞帶,礦田內鉬、鎢、鉛、鋅資源豐富,找礦潛力巨大。礦田內分布有南泥湖、三道莊、上房溝三個超大型斑巖-矽卡巖型鉬礦床,是該區(qū)鉬礦床的主要類型之一。通過研究建立南泥湖鉬礦田典型鉬礦床的地質-地球化學找礦模型,總結出區(qū)內較典型的斑巖-矽卡巖型鉬礦床的一套成礦規(guī)律、找礦標志等,對于指導新礦體的發(fā)現,擴大礦床規(guī)模,甚至對找礦戰(zhàn)略布局及戰(zhàn)術性的找礦評價工作都將具有重要的指導作用。本文在收集南泥湖鉬礦田內地質資料和區(qū)域巖石、蝕變巖與礦石、區(qū)域水系沉積物化探數據、中大比例尺水系沉積物化探數據的基礎上,研究區(qū)內三個超大型礦床的地質特征、地球化學異常特征,建立了三個礦床的地質-地球化學找礦模型。得出以下結論:1、南泥湖鉬多金屬礦田內三個超大型斑巖-矽卡巖型礦床礦體均呈出露狀態(tài),賦礦地層為欒川群矽卡巖和角巖,成礦與南泥湖和上房溝兩個燕山期花崗斑巖體密切相關。區(qū)內北西向及北東向構造共同作用,控制了燕山期中酸性巖體的侵入與礦床的分布。主要礦石類型為矽卡巖型、斑巖型、角巖型,圍巖蝕變主要為主要有矽卡巖化、鉀化、硅化三種。2、與中國花崗巖相比,南泥湖鉬多金屬礦田花崗巖類巖石明顯富集Cu、Zn、Nb、Ta、Th、U、Rb、Cr、Ga、Ge等元素,富集系數大于1.2;稀土元素較貧化。與區(qū)域巖石相比,南泥湖鉬多金屬礦田內蝕變巖明顯富集Sr、V、Cr、Co、Ni、Zn、Ga、Ba、Pb和Sc等元素,富集系數大于1.19。中大比例尺水系沉積物化探研究顯示,該區(qū)成礦指示元素組合為Mo、W、Pb、Zn、Au、Ag、Cu、As計8項元素;相對于中國水系沉積物而言,區(qū)內Pb、Mo、Ag、W、Zn明顯富集,富集系數大于5.0。區(qū)域水系沉積物化探研究顯示,可作為該區(qū)成礦指示元素的有Mo、W、Bi、Cu、Pb、Zn、Cd、Au、Ag、F、Mn、P、V、As、Sb、Sn計16種元素;相對于中國水系沉積物而言,區(qū)內明顯富集的元素有Pb、Cd、W、Ag、Bi、Zn、Mo,富集系數均大于2.5。
[Abstract]:The West Henan area is an important part of the East Qinling molybdenum ore belt. The South Nainihu molybdenum polymetallic ore field is located in Lengshui Town in the south of Luanchuan County, Luoyang City, Western Henan Province. The ore-forming subzone of Xiaoqinling-Western Henan Province is located in the southern margin of the North China block in the division of metallogenic belt. The ore field is rich in molybdenum, tungsten, lead and zinc resources and has great prospecting potential. Three superlarge porphyry skarn type molybdenum deposits in Shangfanggou are one of the main types of molybdenum deposits in this area. A set of metallogenic rules and prospecting marks of typical porphyry skarn type molybdenum deposits in the area are summarized, which can guide the discovery of new orebodies and enlarge the scale of the deposits. This paper collects geological data and regional rock, altered rock and ore, regional water system sediment geochemical exploration data in Nannihu molybdenum ore field. On the basis of geochemical exploration data of sediments in large and medium scale water system, the geological characteristics and geochemical anomalies of three super large deposits in this area are studied. The geological geochemical prospecting models of the three deposits are established, and the following conclusions are drawn: the orebodies of the three super-large porphyry skarn type deposits in the South Nihu Molybdenum Polymetallic Orefield are exposed, and the ore-bearing strata are skarn and hornstone of Luanchuan group. The mineralization is closely related to the Yanshanian granitic porphyry in Nannihu and Shangfanggou. The interaction of NW and NNE structures controls the intrusions and the distribution of Yanshanian intermediate acidic rock bodies. The main ore types are skarn type. Porphyry type, hornstone type and wall rock alteration are mainly composed of skarn, potassium and silicification. Compared with Chinese granites, the granite rocks in the molybdenum polymetallic ore field of Nannihu Lake are obviously enriched in the elements such as Cuznznzhu-NbPu, Th _ (+) ~ (+) ~ (-) ~ (-) ~ ((1)) ~ ((1)) ~ (-) ~ ((1)), etc. The enrichment coefficient is greater than 1.2 and the rare earth element is relatively poor. Compared with the regional rocks, the altered rocks in the molybdenum polymetallic ore field of Nannihu Lake are obviously enriched in elements such as Sr _ (V) _ (V) _ (Cr) _ (C) _ (1) ~ ((1)) ~ (-) ~ (-) ~ (-) ~ (-) ~ ((1)), and the enrichment coefficient is greater than 1.19. The results of geochemical exploration on medium and large scale hydrological sediments show that. The ore-forming indicator element assemblage in this area is composed of 8 elements, which are composed of eight elements, and the Pb MoMoAg-WN Zn in this area is obviously enriched with a enrichment coefficient greater than 5.0 compared with the sediments of the Chinese water system, and the geochemical exploration of the regional drainage sediments shows that, There are 16 kinds of elements which can be used as indicator elements for mineralization in this area, and there are 16 kinds of elements in this area. Compared with the sediments of Chinese water system, the obvious enrichment elements in this area are PbCU, CDW, AgBiZnMo, and the enrichment coefficients are all more than 2.5.
【學位授予單位】：中國地質大學(北京)
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P618.2

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