本文選題：控礦作用 + 找礦意義��； 參考：《科學(xué)技術(shù)與工程》2016年03期

【摘要】：贛西北武寧縣石門寺鎢礦是大湖塘世界級超大型W-Cu-Mo多金屬礦集區(qū)的重要組成部分,其鎢資源量占礦集區(qū)鎢資源總量的67%,其中細脈浸染型鎢礦體占礦區(qū)鎢礦總儲量的74%,是礦區(qū)最重要的礦化類型。石門寺細脈浸染型鎢礦產(chǎn)于燕山期似斑狀黑云母花崗巖的內(nèi)外接觸帶,與似斑狀黑云母花崗巖的成巖時間一致,礦石硫同位素顯示成礦物質(zhì)來源于巖漿,反映似斑狀黑云母花崗巖為細脈浸染型鎢礦提供了鎢金屬,控制了礦體的成礦時間和產(chǎn)出空間。石門寺礦區(qū)似斑狀黑云母花崗巖的源巖雙橋山群含鎢量高達9.16×10-6,部分熔融時鎢金屬趨于進入巖漿。富鎢巖漿發(fā)生結(jié)晶分異,殘留巖漿中鎢金屬得到進一步富集,該殘留巖漿匯集到巖體頂部,出溶成礦流體。巖漿出溶的成礦流體使圍巖晉寧期黑云母花崗閃長巖和燕山期的似斑狀黑云母花崗巖發(fā)生云英巖化,導(dǎo)致巖石中鐵、錳和鈣等元素析出;這些鐵、錳和鈣與成礦流體中的鎢金屬結(jié)合,形成細脈浸染狀黑鎢礦和白鎢礦。似斑狀黑云母花崗巖的內(nèi)、外接觸帶是礦體產(chǎn)出的空間,云英巖化的范圍指示礦體產(chǎn)出的位置,巖體接觸帶和云英巖是找礦的直接標(biāo)志。緊鄰礦體的、產(chǎn)于似斑狀黑云母花崗巖頂部的具有流體出溶性質(zhì)的似偉晶巖殼巖性特征明顯,野外極易辨認,可作為找礦的標(biāo)志層。富鎢的高分異S-型花崗巖小巖體及控巖構(gòu)造是找礦的區(qū)域標(biāo)志。
[Abstract]:The Shimensi tungsten deposit in Wuning County, northwest of Jiangxi Province, is an important part of the world class W-Cu-Mo polymetallic ore accumulation area in Dahutang. The tungsten resources account for 67% of the total tungsten resources in the ore concentration area, in which the vein-impregnated tungsten ore body accounts for 74% of the total reserves of tungsten ore in the mining area, which is the most important type of mineralization in the mining area. The Shimensi vein disseminated tungsten deposit occurred in the inner and outer contact zone of Yanshanian porphyry biotite granite, which is consistent with the diagenetic time of porphyry biotite granite. The ore sulfur isotope shows that the ore-forming material originates from magma. The results show that the porphyry biotite granites provide tungsten metal for the vein-impregnated tungsten ore and control the ore-forming time and production space of the orebody. The source rock Shuangqiao Mountain Group of the porphyry biotite granite in the Shimensi mining area contains as much as 9.16 脳 10 ~ (-6) tungsten, which tends to enter the magma during partial melting. Tungsten rich magma is characterized by crystallization differentiation and further enrichment of tungsten metal in residual magma. The residual magma accumulates to the top of the rock mass to produce dissolved ore-forming fluid. The magmatic dissolution of the ore-forming fluid causes the occurrence of greytonitization in the surrounding rocks of the Jinning period biotite granodiorite and the Yanshanian porphyry biotite granite, resulting in the precipitation of iron, manganese and calcium in the rocks. Manganese and calcium combine with tungsten metal in ore-forming fluid to form vein-disseminated wolframite and scheelite. The inner and outer contact zone of porphyry biotite granite is the space of orebody production, the range of quartz petrolization indicates the location of orebody, the contact zone of rock mass and the quartzite rock are the direct sign of prospecting. Adjacent to the orebody and occurring on the top of porphyry biotite granite, the lithologic characteristics of fluid-solubilized pegmatite crust are obvious and easy to be recognized in the field, which can be used as a marker for prospecting. The small rock mass and controlling rock structure of high grade S-type granite rich in tungsten are the regional indicators of prospecting.
【作者單位】： 中國地質(zhì)大學(xué)(北京)地球科學(xué)與資源學(xué)院;東華理工大學(xué)省部共建核資源與環(huán)境國家重點實驗室培育基地;中國地質(zhì)科學(xué)院地質(zhì)研究所;江西地質(zhì)礦產(chǎn)局贛西北地質(zhì)大隊;
【基金】：國家科技支撐計劃項目(2011BAB04B02) 中國地質(zhì)調(diào)查局項目(1212011220248) 教育部核資源與環(huán)境重點實驗室開放基金項目(NRE1209)資助
【分類號】：P618.67

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