本文選題：斑巖帶　切入點：斑巖成礦帶　出處：《地學(xué)前緣》2017年06期 　論文類型：期刊論文

【摘要】：東昆侖地塊近年來陸續(xù)發(fā)現(xiàn)和勘探一些斑巖型礦床,顯示斑巖成礦作用的重要性和斑巖型礦床的找礦潛力。筆者在東昆侖新近發(fā)現(xiàn)多條斑巖帶,它們相互平行,呈NE向產(chǎn)出,規(guī)模不等,既可產(chǎn)于兩條近EW向主干斷裂帶之間,又可穿越主干斷裂帶;既可產(chǎn)于昆南區(qū)、昆中區(qū)或昆北區(qū),又可跨區(qū)產(chǎn)出;主要出露于昆中帶和昆北帶,又以東昆侖東段都蘭地區(qū)和西段祁漫塔格地區(qū)為主。斑巖體于印支期集中產(chǎn)出,其中印支晚期成礦能力較強�；◢彴邘r主要為高鉀鈣堿性系列,少量為堿性系列。斑巖型礦床氧逸度δFMQ值變化于2~4之間,并普遍屬于埃達克質(zhì)巖,體現(xiàn)較好的成礦遠(yuǎn)景。斑巖帶的形成造就NE向斑巖型成礦帶產(chǎn)出,而NE向斷裂帶即是斑巖成礦構(gòu)造,故亦可稱之為斑巖型構(gòu)造-巖漿-成礦帶。NE向斑巖帶的識別與確認(rèn),是東昆侖斑巖類地質(zhì)與成礦研究的新發(fā)現(xiàn),這對區(qū)內(nèi)的構(gòu)造活動、巖漿作用、地質(zhì)演化與成礦預(yù)測等,均具重要意義。
[Abstract]:Some porphyry deposits have been discovered and explored in the East Kunlun block in recent years, which shows the importance of porphyry mineralization and the prospecting potential of porphyry deposits. Several porphyry belts have recently been discovered in East Kunlun, which are parallel to each other and occur in NE direction. In different scale, it can be produced between two main faults near EW direction and across the main fault zone, and can be produced both in the southern, central and northern regions of Kunming and across regions, and mainly in the middle and north of Kun. In the east of Kunlun, the Dulan area and the western Qimantage area are the main ones. The porphyry is concentrated in Indosinian period, in which the late Indosinian ore-forming ability is stronger. The granitic porphyry is mainly composed of high-potassium calc-alkaline series. A few are alkaline series. The oxygen fugacity 未 FMQ values of porphyry deposits vary from 2 to 4, and generally belong to adakitic rocks, showing a good metallogenic prospect. The formation of porphyry belts leads to the occurrence of NE porphyry metallogenic belts. NE-trending fault zone is porphyry metallogenic structure, so it can be called porphyry tectonic-magmatic metallogenic belt. It is a new discovery of porphyry geology and metallogeny in East Kunlun Mountains. Magmatism, geological evolution and metallogenic prediction are of great significance.
【作者單位】： 中國地質(zhì)大學(xué)(北京)科學(xué)研究院;青海省第三地質(zhì)礦產(chǎn)勘查研究院;青海省地質(zhì)調(diào)查局;
【基金】：國家自然科學(xué)基金項目(41730427,41172088) 青海省地質(zhì)調(diào)查局地勘基金項目“青海省東昆侖斑巖成礦規(guī)律研究與找礦靶區(qū)預(yù)測”;青海省地質(zhì)調(diào)查局地勘基金項目“青海省銅礦主要成礦類型選區(qū)研究”
【分類號】：P612
，

本文編號：1647805