本文選題：磁鐵礦 + 變質(zhì)作用�。� 參考：《昆明理工大學(xué)》2015年碩士論文

【摘要】：云南景洪疆鋒磁鐵礦位于勐龍寬谷形盆地的南西端,是三江成礦帶的組成部分,產(chǎn)于元古界大勐龍群變質(zhì)巖中,屬于海相基性火山噴流-沉積-變質(zhì)型磁鐵礦床。本文在綜合研究前人研究成果以及野外實地現(xiàn)場調(diào)研的前提下,通過對該礦區(qū)的礦床地質(zhì)特征、控礦因素、成礦規(guī)律等方面系統(tǒng)研究,對礦床成因提出了新的認(rèn)識,并補充相關(guān)依據(jù)。總結(jié)了研究區(qū)的找礦標(biāo)志,指出了找礦方向,圈定了找礦靶區(qū)。并對研究區(qū)的找礦前景進(jìn)行了評價。主要取得了如下成果和認(rèn)識：1.礦體大多成似層狀、條帶狀、透鏡狀產(chǎn)出,賦存在Ptdm地層層位,主要在大勐龍群下段第二、三層。受巖性控制明顯,主要賦存在矽卡巖中。部分礦體受斷層影響。礦石結(jié)構(gòu)較為單一,為半自形-它形粒狀結(jié)構(gòu)。礦石構(gòu)造常見有：塊狀構(gòu)造、浸染狀構(gòu)造、斑塊狀構(gòu)造、條帶狀構(gòu)造等,以浸染狀構(gòu)造為主。2.通過查閱整理相關(guān)前人研究總結(jié)得出,主要通過同位素資料分析,得到礦物質(zhì)來源主要來自上地�；虻貧ど畈�,并經(jīng)歷多期變質(zhì)作用富集成礦。3.通過對疆鋒鐵礦的控礦因素研究發(fā)現(xiàn),該礦區(qū)成礦受到地層(Ptdm).巖性(矽卡巖)、構(gòu)造(疆鋒背斜南東翼,縱向斷層F4、F10挾持地段,受部分橫向斷層影響切斷)、圍巖蝕變等因素控制。以巖性和地層為主要控制因素。4.通過研究該礦區(qū)的成礦地質(zhì)條件、礦床成因、控礦因素,結(jié)合對物探磁異常圖的分析,對疆鋒鐵礦的成礦遠(yuǎn)景區(qū)進(jìn)行預(yù)測,提出礦區(qū)中部(10-36號勘探線間)有較大的找礦前景,圈定了26-36號勘探線之間為未來找礦靶區(qū)；大勐龍群下段第二層(Ptdm1-2)的找礦空間較大。
[Abstract]:Yunnan Jinghongjiang geomagnetite is located at the western end of the Menglong wide valley basin and is a part of the Sanjiang metallogenic belt. It occurs in metamorphic rocks of the Proterozoic Dumenglong Group and belongs to the marine basic volcanic jet sedimentary metamorphic magnetite deposit. On the premise of synthetically studying the former research results and the field investigation in the field, this paper systematically studies the geological characteristics, ore-controlling factors and metallogenic rules of the ore deposit, and puts forward a new understanding of the genesis of the deposit. And supplement the relevant basis. This paper summarizes the prospecting criteria of the study area, points out the prospecting direction and delineates the prospecting target area. The prospect of prospecting in the study area was evaluated. The main achievements and understandings are as follows: 1. The orebodies are mostly layered, banded and lenticular, occurring at the Ptdm stratigraphic site, mainly in the second and third layers of the lower part of the Damenglong Group. Obviously controlled by lithology, mainly occurs in skarn. Some orebodies are affected by faults. The ore structure is relatively simple, which is a semi-automorphism-it-shaped granular structure. Ore structures include block structure, disseminated structure, patch structure, stripe structure and so on. Through the review and collation of related previous studies, it is concluded that, mainly through the analysis of isotopic data, the source of minerals mainly comes from the upper mantle or deep crust, and experienced multiple metamorphic enrichment mineralization .3. By studying the ore-controlling factors of Xinjiang Feng Iron Mine, it is found that the ore-forming of this ore area is affected by the formation of Ptdmcor. Lithology (skarn), structure (southward eastern wing of Xinjiang front anticline, longitudinal fault F4 / F10 entrainment, controlled by some transverse faults, wall rock alteration and so on). Taking lithology and strata as the main controlling factors. By studying the ore-forming geological conditions, ore genesis and ore-controlling factors, combining with the analysis of geophysical magnetic anomaly map, this paper predicts the metallogenic prospective area of Xinjiang Feng Iron Mine, and points out that there is a great prospect of prospecting between No. 10-36 Prospecting Line in the middle of the mining area. The prospecting space of Ptdm1-2 in the lower part of Damenglong Group is relatively large.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.31

【參考文獻(xiàn)】

相關(guān)期刊論文 前5條

1 楊天奇;云南景洪國防前寒武紀(jì)變質(zhì)含鐵建造及鐵礦床成因[J];長春地質(zhì)學(xué)院學(xué)報;1983年03期

2 趙珍梅;董長海;雷華;閆東川;馬偉;李祥強(qiáng);文元亮;;中國大中型金屬礦床與地塊拼合帶的關(guān)系[J];地質(zhì)與勘探;2011年05期

3 范建輝;趙含軍;李阿者;;云南勐海盤龍山鐵礦礦床成因[J];云南地質(zhì);2011年03期

4 和自興;;云南三年地質(zhì)找礦行動計劃開局順利成果豐碩[J];云南地質(zhì);2011年02期

5 楊建華;高旭焦;譚曉偉;;云南景洪先坦接觸變質(zhì)交代型磁鐵礦[J];云南地質(zhì);2013年01期

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