本文選題：湘西李梅 + 清虛洞組　； 參考：《長(zhǎng)安大學(xué)》2015年碩士論文

【摘要】：湘西-鄂西成礦帶位于揚(yáng)子地臺(tái)與南華活動(dòng)帶過(guò)渡區(qū),是我國(guó)16個(gè)重要成礦帶之一�，F(xiàn)已查明湘西北鉛鋅礦產(chǎn)于寒武系清虛洞組,含礦地層是重要的找礦目標(biāo)�！跋嫖骼蠲返V田清虛洞組含礦層的構(gòu)造沉積巖相特征研究”作為學(xué)位論文選題,具有重要的研究意義和找礦價(jià)值。本文依托“湘西張家界花垣整裝勘查區(qū)礦田地質(zhì)研究和找礦”地調(diào)項(xiàng)目,通過(guò)翔實(shí)的野外地質(zhì)調(diào)查,取得剖面測(cè)量、構(gòu)造路線觀測(cè)、鉆孔編錄、采樣分析等大量實(shí)際資料,進(jìn)一步結(jié)合前人的成果資料開(kāi)展綜合分析,按時(shí)完成學(xué)位論文。在李梅礦田清虛洞期構(gòu)造沉積巖相古地理、成礦構(gòu)造和成礦規(guī)律等方面研究取得以下主要成果:1.詳細(xì)編制了湘西李梅礦田清虛洞期巖相古地理圖,深化了沉積相展布特點(diǎn)及構(gòu)造演變成礦的認(rèn)識(shí)。根據(jù)實(shí)測(cè)剖面,利用單因素分析多因素綜合作圖,顯示清虛洞期沉積巖相由北西至南東依次為:局限臺(tái)地相、藻灰?guī)r相、淺水陸棚相。清虛洞組沉積盆地分布受NE-NNE方向構(gòu)造控制。沉積相屬于樞紐帶碳酸鹽巖體系,顯示灘-礁-灘沉積相特征。鉛鋅礦床均分布于藻灰?guī)r相。在富礦體集中地段,藻灰?guī)r的厚度一般都大于100m。2.提出研究區(qū)兩期成巖成礦構(gòu)造,1)較早期的NW-SE向擠壓應(yīng)力場(chǎng),形成了李梅、太陽(yáng)山等NE-NNE向褶皺構(gòu)造和麻栗場(chǎng)逆沖斷裂帶等構(gòu)造。該期構(gòu)造活動(dòng)形成了主要的導(dǎo)礦、容礦和儲(chǔ)礦構(gòu)造。2)晚期的NE-SW向擠壓剪切應(yīng)力場(chǎng),控制了成巖成礦期同生斷層花垣-張家界大斷裂,形成先左行擠壓逆沖,后期右行張裂下滑的活動(dòng)。使該走滑正斷裂帶對(duì)賦礦層位構(gòu)成了一定的破壞。3.礦床主要是受各類斷裂裂隙和藻灰?guī)r相地層控制。清虛洞組早期構(gòu)造控制了碳酸鹽巖體系的灘-礁-灘相樞紐帶沉積,使成巖期及其地層褶皺彎曲,藻礁灰?guī)r相、淺灘相巖石的孔隙和裂隙成為主要的容礦空間,清虛洞組晚期構(gòu)造有一定變化,繼續(xù)發(fā)育層間角礫巖化和碳酸鹽化,這使的含礦熱液在裂隙和孔隙空間疊加聚集成礦。4.根據(jù)清虛洞組巖相分布和花垣-茶洞同生斷裂的認(rèn)識(shí)開(kāi)展成礦預(yù)測(cè):楊家寨和大腦坡深部隱伏礦層被鉆孔揭露,證實(shí)清虛洞組含礦藻灰?guī)r相呈NE-NNE向展布,且跨過(guò)花垣-茶洞大斷裂。斷裂北側(cè)600米深部見(jiàn)礦,南側(cè)100米深部見(jiàn)礦,說(shuō)明花垣-張家界斷裂正斷層活動(dòng)上盤北部巖塊下滑500米,花垣-茶洞斷裂帶并非礦田的北邊界,斷裂帶北側(cè)具有較大的找礦前景,是下一步工作的優(yōu)選靶區(qū)。
[Abstract]:Xiangxi-western Hubei metallogenic belt is one of 16 important metallogenic belts in China, which is located in the transitional area between Yangtze platform and South China active belt. It has been found that the lead-zinc deposits in northwest Hunan are in the Cambrian Qingxuodong formation and the ore-bearing strata are the important prospecting targets. The study on the structural sedimentary facies of the ore-bearing strata of Qingxuodong formation in Li Mei Orefield in Western Hunan Province is of great significance and prospecting value as the subject of the dissertation. This paper relies on the geological research and prospecting project of "the complete Orefield Geological Research and Prospecting in Huayuan, Zhangjiajie, Western Hunan Province," and obtains a large number of practical data, such as section survey, structural route observation, borehole cataloguing, sampling and analysis, through detailed field geological surveys. Further combined with the results of previous comprehensive analysis, on time to complete the thesis. In the study of sedimentary lithofacies paleogeography, metallogenic structure and metallogenic regularity of Qingxuodong period in Li Mei ore field, the following main achievements have been obtained: 1. The lithofacies paleogeography map of Qingxuodong period in Li Mei ore field in western Hunan is compiled in detail, which deepens the characteristics of sedimentary facies distribution and the understanding of tectonic evolution. According to the measured profiles and by using single factor analysis and multifactor comprehensive mapping, it is shown that the sedimentary lithofacies of Qingxuodong period are: limited platform facies, algal limestone facies and shallow shelf facies. The sequence of sedimentary lithofacies from north to west to south to east is: limited platform facies, algal limestone facies and shallow shelf facies. The distribution of sedimentary basins in Qingxuodong formation is controlled by the NE-NNE direction. The sedimentary facies belong to the carbonate rock system of the junction zone, showing the characteristics of the beach-reef-beach sedimentary facies. All lead-zinc deposits are distributed in algal limestone facies. In the concentrated area of ore-rich bodies, the thickness of algal limestone is generally greater than 100 m. 2. It is suggested that the early NW-SE compressive stress field in the two stages of diagenetic and metallogenic structure in the study area formed Li Mei, Sun Mountain and other NE-NNE fold structures, and the Mashichang thrust fault zone and so on. During this period, the main ore-conducting, ore-bearing and ore-storage tectonics formed NE-SW compressional shear stress field in the late stage, which controlled the large fault of Huayuan-Zhangjiajie in the diagenetic and metallogenic period, and formed the first left compressional thrust. Late right row tension glide activity. The strike-slip normal fault zone caused a certain damage to the ore-bearing horizon. The deposit is mainly controlled by various fracture fissures and algal limestone facies strata. The early tectonics of Qingxuodong formation controlled the deposit of the beach, reef and beach facies junction zone of carbonate system, which made the diagenetic period and its stratum fold bend, the pore and fissure of algal reef limestone facies and shoal facies rock become the main ore-bearing space. The late tectonics of Qingxuodong formation have some changes and continue to develop interlaminar breccia and carbonization, which results in the superposition and accumulation of ore-bearing hydrothermal fluid in the fissure and pore space to form ore .4. According to the lithofacies distribution of Qingxuodong formation and the understanding of Huayuan-Chadong syngenic faults, the metallogenic prediction is carried out: the buried strata in Yangjiazhai and the deep slope of the cerebrum are exposed by drilling, it is proved that the facies of algal limestone in Qingxuodong formation is distributed in NE-NNE direction. And across the Huaguan-tea hole rupture. The 600 meters deep ore deposits in the north side of the fault and the 100 meters deep ore deposits in the south side show that the Huayuanyan-Zhangjiajie fault normal fault block in the northern part of the upper block slid 500 meters, and the Huayuan-Chadong fault zone is not the northern boundary of the ore field. The north side of the fault zone has a great prospect of prospecting, which is the best target area for further work.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P613

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張培興;趙元龍;楊宇寧;羅繡春;潘永金;;貴州劍河八郎寒武系清虛洞組拜如尼亞蟲(chóng)Byronia Mathew,1899的發(fā)現(xiàn)[J];貴州大學(xué)學(xué)報(bào)(自然科學(xué)版);2013年03期

2 張培興;趙元龍;王平麗;楊宇寧;羅繡春;;貴州劍河八郎寒武系清虛洞組的楔葉形蟲(chóng)Sphenothallus Hall,1847[J];微體古生物學(xué)報(bào);2013年03期

3 劉建鋒;彭軍;魏志紅;宋志瑞;蒲洪果;熊超;羅曦;章新文;;川東南清虛洞組沉積特征及其對(duì)儲(chǔ)層的控制[J];地學(xué)前緣;2012年04期

4 鄒建波;陳國(guó)勇;劉愛(ài)民;王敏;;貴州五指山地區(qū)鉛鋅賦礦地層清虛洞組微相特征及其指相意義[J];中國(guó)西部科技;2009年18期

5 馮偉明;彭軍;馮春明;王亮;甘元超;;川東南清虛洞組儲(chǔ)層測(cè)井響應(yīng)特征及控制因素[J];吐哈油氣;2011年03期

6 馬志鑫;張萬(wàn)平;劉偉;李波;;黔東鎮(zhèn)遠(yuǎn)地區(qū)早寒武世清虛洞組潮坪風(fēng)暴沉積特征及古地理意義[J];沉積學(xué)報(bào);2012年05期

7 馬志鑫;劉偉;張萬(wàn)平;李波;;碳酸鹽巖緩坡向鑲邊臺(tái)地的轉(zhuǎn)化:以黔東麻江地區(qū)下寒武統(tǒng)清虛洞組為例[J];地質(zhì)科技情報(bào);2013年04期

8 湯朝陽(yáng);鄧峰;李X;段其發(fā);鄒先武;戴平云;;湘西—黔東地區(qū)寒武系清虛洞組地層特征與鉛鋅成礦關(guān)系[J];中國(guó)地質(zhì);2012年04期

9 馮偉明;彭軍;馮春明;王亮;甘元超;;川東南清虛洞組儲(chǔ)層測(cè)井響應(yīng)特征及其控制因素[J];油氣地球物理;2011年03期

10 匡文龍;楊紹祥;余沛然;勞可通;;湘西北花垣縣下寒武統(tǒng)清虛洞組濁積巖沉積特征及其地質(zhì)意義[J];地質(zhì)科學(xué);2008年02期

相關(guān)會(huì)議論文 前1條

1 趙元龍;袁金良;彭進(jìn);楊興蓮;楊宇寧;;貴州劍河八郎都勻階“清虛洞組”上部生物組合特征及意義[A];中國(guó)古生物學(xué)會(huì)第26屆學(xué)術(shù)年會(huì)論文集[C];2011年

相關(guān)碩士學(xué)位論文 前1條

1 薛長(zhǎng)軍;湘西李梅礦田清虛洞組含礦層的構(gòu)造沉積巖相特征研究[D];長(zhǎng)安大學(xué);2015年

，

本文編號(hào)：1786783