本文關(guān)鍵詞： 香山地區(qū) 大地電磁測深電性結(jié)構(gòu) 礦產(chǎn)勘探　出處：《成都理工大學》2015年碩士論文　論文類型：學位論文

【摘要】：論文利用甘肅平川水泉—寧夏靈武紅柳坑大地電磁測深剖面資料,以香山地區(qū)的地質(zhì)地球物理結(jié)構(gòu)為背景,建立了香山地區(qū)的深部電性結(jié)構(gòu),結(jié)合地球物理、地質(zhì)資料,探討了沿剖面各深大斷裂帶在深部的延伸情況和各構(gòu)造單元邊界帶,揭示了沿剖面的鄂爾多斯西緣隆褶帶、衛(wèi)寧北山—羅山坳陷帶、中衛(wèi)—同心斷裂帶、香山隆褶帶、興仁—海原坳陷帶及西華山—六盤山隆褶帶30千米深度的電性結(jié)構(gòu)特征及相互關(guān)系,結(jié)合香山地區(qū)的相關(guān)資料,預(yù)測成礦遠景區(qū)。主要成果包括:(1)結(jié)合研究區(qū)已有地質(zhì)、地球物理及物性測試資料,針對礦產(chǎn)評價等任務(wù),梳理了本次物探工作的主要探測對象:香山逆沖推覆體、高阻巖體、滑脫面及典型斷層,建立了單獨探測對象的地電斷面模型及實測剖面深部粗結(jié)構(gòu)地電斷面模型,開展了大地電磁正演模擬及反演計算,模擬結(jié)果表明MT方法能有效探測研究區(qū)典型地質(zhì)構(gòu)造。(2)對張量阻抗資料進行處理分析,得到了研究區(qū)的二維偏離度,反映測區(qū)以二維構(gòu)造為主;利用阻抗張量分解方法獲得沿剖面方向不同構(gòu)造單元的構(gòu)造走向或者傾向(最佳方位角),測區(qū)最佳方位角與電極布置方向呈22.5度夾角,并依據(jù)最佳方位角對阻抗進行了旋轉(zhuǎn)校正。(3)二維反演剖面圖得出衛(wèi)寧北山—羅山坳陷帶與鄂爾多斯西緣隆褶帶內(nèi),總體表現(xiàn)出較低的電阻率電性結(jié)構(gòu)特征,在中衛(wèi)—同心斷裂帶與香山隆褶帶表現(xiàn)出較高的電阻率電性結(jié)構(gòu)特征,在西華山—六盤山隆褶帶電阻率表現(xiàn)出低—高—低的電性結(jié)構(gòu)特征。(4)構(gòu)造解析圖得出逆沖推覆滑脫面及拆離斷層等地球物理找礦標志的深部展布特征,結(jié)合香山地區(qū)的礦產(chǎn)資料、地質(zhì)資料和地球物理資料,了解該地區(qū)的成礦地質(zhì)背景、礦床成因與深部成礦構(gòu)造環(huán)境,圈定天景山為找礦遠景區(qū)。
[Abstract]:Based on the magnetotelluric sounding profile data of Pingchuan Shuiquan Ningxia Lingwu Hongliukeng in Gansu Province and taking the geological geophysical structure of Xiangshan area as the background the deep electrical structure of Xiangshan area is established and combined with geophysics. The geological data, the extension of each deep fault zone along the section and the boundary zones of each tectonic unit are discussed, and the uplift belt along the western margin of Ordos and the Weining Beishan-Luoshan depression belt along the section are revealed. The electrical structural characteristics of the Zhongwei-concentric fault zone, the Xiangshan uplift belt, the Xingren-Haiyuan depression belt and the Xihuashan-Liupanshan uplift belt at a depth of 30 km and their interrelations, combined with the relevant data of the Xiangshan area. The main achievements of the study area include geological, geophysical and physical testing data, mineral evaluation and so on. The main exploration objects of this geophysical exploration work are summarized: Xiangshan thrust nappe, high resistivity rock mass, slip plane and typical fault. The geoelectric cross-section model of the single object and the geoelectric section model of the thick structure in the depth of the measured section are established, and the magnetotelluric forward modeling and inversion calculation are carried out. The simulation results show that MT method can effectively detect typical geological structures in the study area. (2) the impedance data of Zhang Liang can be processed and analyzed, and the 2-D deviation degree of the studied area is obtained, which reflects the main two-dimensional structure in the measured area. By using the impedance Zhang Liang decomposition method, the structural strike or tendency of different tectonic units along the profile direction is obtained (the optimum azimuth angle is obtained, and the optimum azimuth angle of the measured area is 22.5 degrees angle with the direction of the electrode arrangement. According to the optimum azimuth angle, the impedance is corrected by rotation. 3) the 2-D inversion profile is obtained in the Beishan-Luoshan depression of Weining and the uplift belt in the western margin of Ordos. On the whole, the electrical structure features of low resistivity and high resistivity in Zhongwei-concentric fault zone and Xiangshanlongfold zone. The resistivity of Xihuashan-Liupanshan uplift shows low-high-low electrical structural characteristics. 4) the deep distribution characteristics of geophysical prospecting marks such as thrust nappe slip surface and detachment fault are obtained. Combined with mineral data, geological data and geophysical data of Xiangshan area, the metallogenic geological background, ore genesis and deep ore-forming tectonic environment of this area are understood, and Tianjingshan is defined as a prospecting area.
【學位授予單位】：成都理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P631.3

【參考文獻】

相關(guān)期刊論文 前9條

1 王鑫;詹艷;趙國澤;王立鳳;王繼軍;;鄂爾多斯盆地西緣構(gòu)造帶北段深部電性結(jié)構(gòu)[J];地球物理學報;2010年03期

2 蔡軍濤;陳小斌;趙國澤;;大地電磁資料精細處理和二維反演解釋技術(shù)研究(一)——阻抗張量分解與構(gòu)造維性分析[J];地球物理學報;2010年10期

3 晉光文;大地電磁阻抗相位資料的特點和應(yīng)用[J];地震地質(zhì);1988年04期

4 閔剛;程建華;尹秉喜;蔡學林;夏時斌;;寧南弧形構(gòu)造帶甘肅大溝—內(nèi)蒙古亂井中上地殼電性結(jié)構(gòu)[J];中國地質(zhì);2014年05期

5 趙國澤,湯吉,詹艷,陳小斌,卓賢軍,王繼軍,宣飛,鄧前輝,趙俊猛;青藏高原東北緣地殼電性結(jié)構(gòu)和地塊變形關(guān)系的研究[J];中國科學(D輯:地球科學);2004年10期

6 胡祖志,胡祥云,吳文鸝,桑卓;大地電磁二維反演方法對比研究[J];煤田地質(zhì)與勘探;2005年01期

7 劉寶勤，朱佐全，賈政，郭萬武，李柱國，張文仁，，屈健鵬;天水地區(qū)大地電磁測量及深部電性結(jié)構(gòu)[J];西北地震學報;1995年04期

8 屈健鵬,朱佐全,楊國棟,李柱國,師水月;鄂爾多斯地塊西緣定邊-景泰地殼和上地幔電性結(jié)構(gòu)分析[J];西北地震學報;1998年02期

9 張云琳，劉曉玲，安海靜，司玉蘭，蔣梅，張五四;祁連山中段深部電性結(jié)構(gòu)及潛在震源危險區(qū)的研究[J];中國地震;1994年01期

相關(guān)博士學位論文 前2條

1 趙紅格;鄂爾多斯盆地西部構(gòu)造特征及演化[D];西北大學;2003年

2 詹艷;青藏高原東北緣地區(qū)深部電性結(jié)構(gòu)及構(gòu)造涵義[D];中國地震局地質(zhì)研究所;2008年

本文編號：1467191