西藏多不雜—波龍礦集區(qū)銅礦床地質(zhì)特征及找礦預(yù)測模型
本文選題:多不雜—波龍礦集區(qū) 切入點(diǎn):銅礦 出處:《金屬礦山》2017年11期
【摘要】:西藏多不雜—波龍礦集區(qū)位于金沙江縫合帶和怒江縫合帶之間,縫合帶內(nèi)已發(fā)現(xiàn)了多個(gè)成帶狀分布的金、銅、鉻礦床,成礦地質(zhì)條件優(yōu)越。在詳細(xì)分析多不雜—波龍礦集區(qū)地層、構(gòu)造、巖漿巖、物化遙特征的基礎(chǔ)上,以該礦集區(qū)內(nèi)的多不雜銅礦為例,詳細(xì)研究了該礦床的地質(zhì)特征,并構(gòu)建了包含巖漿巖特征、控礦構(gòu)造特征、圍巖蝕變特征、地層巖石類型、物化遙異常特征以及表生礦物組構(gòu)的找礦預(yù)測模型。研究表明:經(jīng)工程驗(yàn)證發(fā)現(xiàn)在多不雜—波龍集礦區(qū)的尕爾勤銅礦區(qū)內(nèi)存在一個(gè)長10 km、寬3 km的巨型蝕變體,經(jīng)ZK1901鉆孔深部驗(yàn)證,當(dāng)鉆孔穿越300~400m厚的黃鐵礦+硅化帶后,逐漸出現(xiàn)了銅礦化體,且隨著深度的增加,銅礦化更趨明顯;在該集礦區(qū)NW側(cè)存在規(guī)模較小的銅礦床,SE側(cè)存在一個(gè)規(guī)模較大的黃鐵礦,前者形成于距曉坑火山2.5 km處,沿NW走向的斷裂破碎帶區(qū)域內(nèi),曉坑火山機(jī)構(gòu)SE側(cè)2.5 km范圍內(nèi)的主含礦斷裂為該礦集區(qū)下一步的重點(diǎn)找礦區(qū)域。上述分析對(duì)于在該礦集區(qū)進(jìn)一步開展銅礦及其他多金屬礦找礦勘探工作有一定的借鑒價(jià)值。
[Abstract]:The Dobuza-Bolong ore accumulation area in Tibet lies between the Jinsha River suture zone and the Nujiang suture zone. Many zonal gold, copper and chromium deposits have been found in the suture zone. On the basis of detailed analysis of stratigraphic, structural, magmatic, physicochemical and remote characteristics of the Dobou-Bolong ore accumulation area, the geological characteristics of the deposit are studied in detail, taking the Dobu complex copper deposit in the ore concentration area as an example. The characteristics of magmatic rock, ore-controlling structure, alteration of surrounding rock, types of strata and rocks are constructed. The characteristics of geophysical and chemical remote anomalies and the ore-prospecting prediction model of supergene mineral fabric are studied. The results show that there is a giant alteration of 10 km in length and 3 km in width in the Gaerqin Copper Mine area of Dobuza-Bolongji Mine, which is verified by engineering. Through the deep verification of ZK1901 borehole, when the borehole passes through the 300-400m thick pyrite silicification zone, the copper mineralization appears gradually, and with the increase of depth, the copper mineralization becomes more obvious. There is a large scale pyrite in the SE side of the NW side of the mining area, which is formed in the fracture zone along the NW strike, 2.5 km from the Xiaokeng volcano. The main ore-bearing fault within 2.5 km of the SE side of the Xiaokeng volcanic mechanism is the next key ore prospecting area in the ore concentration area. The above analysis has some reference value for the further exploration of copper and other polymetallic ore deposits in the ore concentration area.
【作者單位】: 江門職業(yè)技術(shù)學(xué)院藝術(shù)設(shè)計(jì)系;
【分類號(hào)】:P618.41
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