本文選題：大湖塘礦集區(qū) + 石門寺礦段　； 參考：《吉林大學(xué)學(xué)報(地球科學(xué)版)》2017年03期

【摘要】：在大湖塘北區(qū)鎢礦找礦勘查過程中,在總結(jié)分析20世紀80年代初針對石英大脈型黑鎢礦的普查資料基礎(chǔ)上,通過地表填圖和老窿編錄,發(fā)現(xiàn)前人認為的混合黑云母花崗巖與混合白云母花崗巖之間為截然清楚的侵入接觸關(guān)系,二者之間穩(wěn)定地分布著一層似偉晶巖殼;由空間關(guān)系和區(qū)域成礦規(guī)律推斷似斑狀黑云母花崗巖為燕山期侵入于晉寧期黑云母花崗閃長巖之中的成礦母巖。晉寧期黑云母花崗閃長巖為成礦有利圍巖,在云英巖化等蝕變過程中釋放出形成白鎢礦的鈣離子。燕山期似斑狀黑云母花崗巖巖株與晉寧期黑云母花崗閃長巖巖基之間的侵入接觸界面是最主要的成礦構(gòu)造與成礦結(jié)構(gòu)面,控制了主礦體的位置、形態(tài)與產(chǎn)狀。在研究區(qū)內(nèi)首次于新元古代花崗閃長巖中發(fā)現(xiàn)厚大的白鎢礦工業(yè)礦體,并根據(jù)不同巖塊混雜、被長英質(zhì)充填物膠結(jié)等特征識別出熱液隱爆角礫巖型礦體�；趯ΦV區(qū)成礦地質(zhì)條件和礦床地質(zhì)特征的新認識,修改了針對石英大脈型黑鎢礦所做的詳查設(shè)計,抓住細脈浸染型白鎢礦這一主要礦床類型,及時調(diào)整了找礦目標和勘查手段,在短時間內(nèi)實現(xiàn)了贛北地區(qū)鎢多金屬找礦的重大突破。通過與石門寺礦段成礦地質(zhì)條件類比,預(yù)測毗鄰的苗尾礦段與太平洞礦區(qū)找礦潛力大。
[Abstract]:In the process of prospecting and exploration of tungsten deposits in the northern part of Dahutang, on the basis of summing up and analyzing the general survey data of quartz wolframite in the early 1980s, surface mapping and cataloguing of the old wolframite are carried out. It is found that the relationship between the mixed biotite granite and the mixed Muscovite granite is a distinct and clear intrusive contact relationship, and a pegmatite crust is distributed stably between the two. Based on the spatial relationship and regional metallogenic regularity, it is inferred that porphyritic biotite granodiorite intruded into Jinning biotite granodiorite in Yanshanian period. In Jinning period biotite granodiorite is favorable for ore-forming surrounding rock and the calcium ions formed in scheelite are released during the alteration process of quartzite. The intrusive contact interface between Yanshanian porphyry biotite granite and Jinning biotite granodiorite bedrock is the main ore-forming structure and ore-forming structure plane, which controls the position, morphology and occurrence of the main orebody. In the study area, the thick industrial wolframite ore bodies were first found in Neoproterozoic granodiorite, and hydrothermal crypto-explosive breccia orebodies were identified according to the characteristics of different rock blocks mixed and cemented by feldspathic fillings. Based on the new understanding of ore-forming geological conditions and geological characteristics of ore deposits, the detailed investigation and design of quartz wolframite with large veins are modified, and the main ore deposit type of fine vein disseminated scheelite is grasped. The prospecting target and exploration method were adjusted in time, and the important breakthrough of tungsten polymetallic prospecting in north Jiangxi was realized in a short time. By analogy with the metallogenic geological conditions of the Shimensi section, it is predicted that the adjacent Miao tailings and Taiping Dong mining areas have great prospecting potential.
【作者單位】： 江西省地質(zhì)礦產(chǎn)勘查開發(fā)局九一六大隊;中國地質(zhì)調(diào)查局天津地質(zhì)調(diào)查中心;
【基金】：中國地質(zhì)調(diào)查局項目(12120114034501)~~
【分類號】：P618.67

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本文編號：1965244