本文選題：熱年代學(xué)　切入點(diǎn)：成礦作用年代與時(shí)限　出處：《中國(guó)地質(zhì)大學(xué)(北京)》2016年博士論文

【摘要】：膠東是由前寒武紀(jì)基底巖石和超高壓變質(zhì)巖塊組成、中生代構(gòu)造-巖漿作用發(fā)育的內(nèi)生熱液金礦集區(qū)。該區(qū)中生代經(jīng)歷了華北與揚(yáng)子板塊陸陸碰撞造山作用和大洋板塊俯沖構(gòu)造體制的疊加/轉(zhuǎn)換,發(fā)生了多幕式的大規(guī)模成礦作用和巨量金的工業(yè)聚積,其中90%以上探明儲(chǔ)量集中于膠西北地區(qū)。論文以膠西北金礦床(體)時(shí)空分布、蝕變-礦化特征與礦物組合及控礦構(gòu)造變形研究為基礎(chǔ),開(kāi)展系統(tǒng)的蝕變礦物40Ar/39Ar、鋯石和磷灰石裂變徑跡與鋯石(U-Th)/He熱年代學(xué)研究,結(jié)合鋯石U-Pb,角閃石、白云母和黑云母40Ar/39Ar年代學(xué)工作,構(gòu)建區(qū)域晚中生代構(gòu)造-金成礦熱年代學(xué)模式,獲得以下主要認(rèn)識(shí):1、玲瓏變質(zhì)核雜巖是膠西北礦集區(qū)重要的控礦構(gòu)造,拆離斷層下盤(pán)玲瓏黑云母花崗巖侵位于~163-155Ma,于~155-134Ma沿著玲瓏拆離斷層發(fā)生快速剝露和冷卻,并在拆離斷層內(nèi)形成了超糜棱巖-糜棱巖帶;~134Ma玲瓏變質(zhì)核雜巖隆升和剝蝕減緩,區(qū)域韌-脆性變形轉(zhuǎn)換;郭家?guī)X花崗巖于132-123Ma侵位于玲瓏花崗巖中,并經(jīng)歷了同剪切韌性變形,~123-120Ma區(qū)域大規(guī)模脆性變形疊加。2、區(qū)域前寒武紀(jì)變質(zhì)基底巖石中晚侏羅世金成礦作用發(fā)生于約~162Ma,黃鐵礦顯微褶皺等韌性變形特征說(shuō)明,該期金成礦作用受控于高綠片巖相環(huán)境的韌性變形,與新太古代膠東群TTG片麻巖部分熔融、混合巖化作用和晚侏羅世玲瓏花崗巖侵位結(jié)晶時(shí)間一致,均發(fā)生于區(qū)域大規(guī)模伸展作用初始階段。3、膠西北礦集區(qū)早白堊世發(fā)育了兩期重要金成礦事件:伴隨變質(zhì)核雜巖隆升減緩和郭家?guī)X花崗巖侵位,在玲瓏拆離斷層帶韌-脆性轉(zhuǎn)換域內(nèi)發(fā)生了~130Ma金成礦作用;伴隨斷裂構(gòu)造的遞進(jìn)變形過(guò)程,在脆性變形和熱液蝕變疊加部位發(fā)生了~120Ma的大規(guī)模金成礦作用,于緊靠區(qū)域主控礦斷層下盤(pán),形成浸染狀/網(wǎng)脈狀黃鐵絹英巖型礦體,遠(yuǎn)離主斷裂的下盤(pán)高角度正斷層中形成石英-硫化物脈型礦體。4、變質(zhì)核雜巖的快速隆升和剝蝕導(dǎo)致晚侏羅世金礦床大部分被剝蝕;早白堊世金成礦深度為5-10km,成礦后主控礦斷裂的正斷活動(dòng)導(dǎo)致了其上下盤(pán)差異化的隆升和剝蝕,夾持于玲瓏拆離斷層與焦家斷裂間的地塊剝蝕約3-7km,深部找礦潛力巨大,區(qū)域大規(guī)模脆性變形和熱液蝕變疊加部位是有利的找礦靶區(qū)。
[Abstract]:Jiaodong is composed of Precambrian basement rocks and ultrahigh pressure metamorphic rocks, and the Mesozoic tectonic-magmatism is a concentrated area of endogenic hydrothermal gold deposits.During the Mesozoic Mesozoic, the continental collision orogeny between North China and Yangtze plate and the superposition / transformation of oceanic plate subduction tectonic system occurred, resulting in a multi-scene large-scale mineralization and industrial accumulation of huge amounts of gold.More than 90% of the proven reserves are concentrated in the northwestern region of Jiao.On the basis of temporal and spatial distribution of gold deposits (bodies) in northwestern Jiao, alteration and mineralization characteristics, mineral assemblage and ore-controlling tectonic deformation, a systematic study of 40 Ar39 Ars of altered minerals, fission tracks of zircon and apatite and thermo chronology of zircon U-ThU / he is carried out.Combined with zircon U-Pb, hornblende, Muscovite and biotite 40Ar/39Ar chronology, a regional late Mesozoic tectonic-gold metallogenic thermochronology model was constructed. The main understanding is that the Linglong metamorphic core complex is an important ore-controlling structure in the North Jiaoxi ore concentration area.The Linglong biotite granite intrusion in the lower face of the detachment fault was located at Guang 163-155 Ma. The rapid exfoliation and cooling occurred along the Linglong detachment fault at 155-134 Ma, and the uplift and denudation of the Linglong metamorphic core complex of 134Ma in the ultramylonite-mylonite belt were formed.The regional ductile-brittle deformation transformation, the Guojialing granite in the 132-123Ma transgression is located in the Linglong granite,And experienced the same shear ductile deformation, 123-120Ma regional large-scale brittle deformation superposition. 2, the regional Precambrian metamorphic basement rocks occurred in the late Jurassic gold mineralization about 162Ma. the characteristics of ductile deformation, such as pyrite micro-fold, etc.The gold mineralization in this period is controlled by the ductile deformation of the high-greenschist facies, which is consistent with the partial melting, mixing lithology of the TTG gneiss of the NeoArchean Jiaodong Group and the emplacement crystallization time of the Linglong granite in the late Jurassic.Both occurred in the initial stage of regional large-scale extension. 3. Two important gold mineralization events occurred in the early Cretaceous in the North Jiaoxi ore concentration area: along with the slowing down of the metamorphic core complex and the emplacement of the Guojialing granite.Gold mineralization occurred in the ductile-brittle transition region of the Linglong detachment fault zone, followed by progressive deformation of the fault structure, and large-scale gold mineralization occurred at the brittleness deformation and hydrothermal alteration superposition at 120Ma.At the bottom of the main ore-controlling fault adjacent to the area, the disseminated / net-vein yellow tierite orebody was formed.The quartz-sulfide vein type orebody .4 is formed in the high-angle normal fault far from the main fault. The rapid uplift and denudation of the metamorphic core complex results in the denudation of most of the late Jurassic gold deposits.The gold mineralization depth of the early Cretaceous is 5-10km. The positive fault activity of the main ore-controlling fault after mineralization resulted in the uplift and denudation of the upper and lower face differential, and the erosion of the block between the Linglong detachment fault and the Jiaojia fault was about 3-7km, and the deep prospecting potential was great.Large scale brittle deformation and superposition of hydrothermal alteration are favorable ore-prospecting targets.
【學(xué)位授予單位】：中國(guó)地質(zhì)大學(xué)(北京)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2016
【分類(lèi)號(hào)】：P618.51

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 Liqiang Yang;Jun Deng;Ruipeng Guo;Lin'nan Guo;Zhongliang Wang;Binghan Chen;Xudong Wang;;World-class Xincheng gold deposit:An example from the giant Jiaodong gold province[J];Geoscience Frontiers;2016年03期

2 David I.Groves;M.Santosh;;The giant Jiaodong gold province:The key to a unified model for orogenic gold deposits?[J];Geoscience Frontiers;2016年03期

3 XIA ZengMing;LIU JunLai;NI JinLong;ZHANG TingTing;SHI XingMing;WU Yun;;Structure, evolution and regional tectonic implications of the Queshan metamorphic core complex in eastern Jiaodong Peninsula of China[J];Science China(Earth Sciences);2016年05期

4 夏增明;劉俊來(lái);倪金龍;張婷婷;施性明;吳云;;膠東東部鵲山變質(zhì)核雜巖結(jié)構(gòu)、演化及區(qū)域構(gòu)造意義[J];中國(guó)科學(xué):地球科學(xué);2016年03期

5 朱日祥;范宏瑞;李建威;孟慶任;李勝榮;曾慶棟;;克拉通破壞型金礦床[J];中國(guó)科學(xué):地球科學(xué);2015年08期

6 豆敬兆;付順;張華鋒;;膠東郭家?guī)X巖體固結(jié)冷卻軌跡與隆升剝蝕[J];巖石學(xué)報(bào);2015年08期

7 叢智超;孫豐月;王力;楊桂彬;;山東招遠(yuǎn)九曲金礦床成礦流體地球化學(xué)特征[J];世界地質(zhì);2015年02期

8 宋明春;張軍進(jìn);張丕建;楊立強(qiáng);劉殿浩;丁正江;宋英昕;;膠東三山島北部海域超大型金礦床的發(fā)現(xiàn)及其構(gòu)造-巖漿背景[J];地質(zhì)學(xué)報(bào);2015年02期

9 馮云磊;袁萬(wàn)明;郝娜娜;段宏偉;陳小寧;曹建輝;;吉林樺甸市夾皮溝本區(qū)金礦剝露歷史和礦床保存變化——來(lái)自磷灰石裂變徑跡年代學(xué)證據(jù)[J];地質(zhì)論評(píng);2015年01期

10 劉育;楊立強(qiáng);郭林楠;李瑞紅;高幫飛;孟銀生;張瑞忠;;膠東大尹格莊金礦床成礦流體組成[J];巖石學(xué)報(bào);2014年09期

相關(guān)博士學(xué)位論文 前5條

1 張潮;焦家金礦田斷裂帶構(gòu)造控礦模式[D];中國(guó)地質(zhì)大學(xué)(北京);2015年

2 王中亮;焦家金礦田成礦系統(tǒng)[D];中國(guó)地質(zhì)大學(xué)(北京);2012年

3 王力;華北地塊脈狀金礦床區(qū)域成礦模式研究[D];吉林大學(xué);2011年

4 呂文杰;膠東煙臺(tái)市福山區(qū)杜家崖金礦床成因礦物學(xué)與找礦[D];中國(guó)地質(zhì)大學(xué)（北京）;2010年

5 高幫飛;山東招平金礦帶構(gòu)造—流體耦合成礦動(dòng)力學(xué)[D];中國(guó)地質(zhì)大學(xué)（北京）;2008年

相關(guān)碩士學(xué)位論文 前10條

1 李海林;膠西北羅山金礦床蝕變—礦化網(wǎng)絡(luò)結(jié)構(gòu)[D];中國(guó)地質(zhì)大學(xué)(北京);2015年

2 劉躍;膠東早白堊世早期新城花崗巖成因及其成礦貢獻(xiàn)[D];中國(guó)地質(zhì)大學(xué)(北京);2015年

3 劉向東;膠西北寺莊金礦床流體—巖石反應(yīng)過(guò)程與金成礦機(jī)制[D];中國(guó)地質(zhì)大學(xué)(北京);2015年

4 劉文龍;焦家金礦床礦化網(wǎng)絡(luò)結(jié)構(gòu)[D];中國(guó)地質(zhì)大學(xué)（北京）;2013年

5 盧晶;膠東大尹格莊金礦成礦流體特征及成礦年代學(xué)研究[D];中國(guó)地質(zhì)大學(xué)(北京);2012年

6 耿瑞;山東省棲霞市山城金礦床地質(zhì)特征及成因研究[D];吉林大學(xué);2012年

7 張佳楠;山東萊州焦家金礦床礦化富集規(guī)律及礦床成因探討[D];吉林大學(xué);2012年

8 周鑄;膠西北望兒山金礦床控礦構(gòu)造應(yīng)力場(chǎng)[D];中國(guó)地質(zhì)大學(xué)(北京);2012年

9 劉海彬;山東招遠(yuǎn)蠶莊金礦黃鐵礦成因礦物學(xué)與石英流體包裹體特征研究[D];中國(guó)地質(zhì)大學(xué)(北京);2012年

10 趙泳越;山東省玲瓏金礦礦床成因研究[D];吉林大學(xué);2012年

，

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