本文選題：地氣測量 + 隱伏斷裂�。� 參考：《成都理工大學(xué)》2015年碩士論文

【摘要】：隱伏斷裂探測是地質(zhì)環(huán)境與地殼穩(wěn)定性評價以及資源勘查的一項重要基礎(chǔ)內(nèi)容,尤其是活動斷層探測,對工程建筑、水利水電建設(shè)等具有十分重要的意義。西藏林芝雅魯藏布江中下游大拐彎河段地區(qū),不僅蘊藏豐富能源礦產(chǎn)資源,而且也是我國水能資源最豐富的流域。但由于該地區(qū)地處雅魯藏布江縫合帶上,構(gòu)造運動強烈,斷裂發(fā)育較多,加之高山峽谷地貌廣泛發(fā)育,第四系覆蓋物深厚,導(dǎo)致對該地區(qū)的隱伏斷裂研究帶來了很大的難度,成為對該地區(qū)各項工程建設(shè)與規(guī)劃的制約因素。因此,對該地區(qū)隱伏斷裂的探測與研究對于水利水電工程選址、能源礦產(chǎn)勘查、基礎(chǔ)工程建設(shè)等具有十分重要的意義。本論文在國家自然科學(xué)基金項目:隱伏地質(zhì)體與斷裂的地氣場研究(項目編號:41074094);國家水電顧問集團成都勘測設(shè)計研究院課題:雅魯藏布江中下游米林接地—當(dāng)嘎斷裂、比丁—奪松、里龍等斷裂構(gòu)造特征研究項目的支持下,以西藏米林玉松地區(qū)、林芝色季拉地區(qū)為研究區(qū),采用地氣法與氡氣測量為手段,結(jié)合工區(qū)的地質(zhì)構(gòu)造特征,綜合前人的研究成果,以厘定隱伏斷裂位置與走向為目的,對該地區(qū)是否存在接地—當(dāng)嘎斷裂、藏巴覺柱斷裂等隱伏斷裂進(jìn)行探測與論證,以便對國家水利建設(shè)項目位置選址提供決策參考資料研究工作中,結(jié)合相關(guān)地質(zhì)調(diào)查,針對尋找不同隱伏斷裂的具體情況,分別在兩個測區(qū)內(nèi)布設(shè)了12條測線,其中林芝玉松測區(qū)7條,米林色季拉測區(qū)5條測線,共實施地氣測量374個測點,氡氣測量19個測點,獲得地氣分析數(shù)據(jù)374組,每組39種元素數(shù)據(jù)。通過對所測數(shù)據(jù)的處理與分析,參考地質(zhì)調(diào)查結(jié)果,劃分出存在多元素地氣異常的區(qū)域,在此基礎(chǔ)上,運用多元統(tǒng)計分析手段研究了異常區(qū)域多元統(tǒng)計特征,并運用模糊判別對隱伏斷裂活動性強度進(jìn)行對比分析,探討了地氣場判斷隱伏斷裂活動性的可行性。本文研究獲得以下認(rèn)識:1、在第四系分布廣泛,覆蓋層深厚,斷裂多為隱伏斷裂的地區(qū),地氣測量應(yīng)用于河床地區(qū)隱伏斷層的探測是行之有效的方法。隱伏斷裂破碎帶的垂直上方確實存在多種元素地氣異常,異常元素呈現(xiàn)“群”分布的特點,地氣異常的組合在不同斷裂上方具有相似性,一些微量元素(稀土元素、Y、Rb、U)與造巖元素(Cr、Mn、Zn)等在疑似隱伏斷裂上方都具有明顯的異常高值,為背景值的2倍以上,這在一定程度上對隱伏斷裂具有較好的指示作用。2、根據(jù)林芝玉松測區(qū)的地氣、氡氣測量結(jié)果,結(jié)合地質(zhì)調(diào)查,初步確定雅魯藏布江右岸存在異常的剖面PM01、PM02、PM04異常點為接地—當(dāng)嘎斷層所經(jīng)過的位置,左岸河漫灘無斷層經(jīng)過;而米林色季拉測區(qū)內(nèi)存在異常的剖面PM12、PM14異常點為可能為藏巴覺柱及其分支斷裂通過位置。3、通過結(jié)合聚類分析、微量元素稀土配分等多元統(tǒng)計的方法對異常區(qū)地氣元素的分析,揭示了異常區(qū)元素相關(guān)性與組合特征,表明兩個區(qū)域內(nèi)異常Y、Mn、REE元素具有較大的相似性。4、對比分析了不同斷裂地氣異常襯度,并運用模糊判別方法探討了玉松測區(qū)接地—當(dāng)嘎斷層的活動性,得出了該斷層活動性較弱的特點,表明地氣元素異常襯度的大小能夠反映斷層的活動性強度,異常襯度與斷層活動性呈正相關(guān)的關(guān)系。
[Abstract]:The detection of hidden faults is an important basic content of geological environment and crustal stability evaluation and resource exploration, especially active fault detection, which is of great significance for engineering buildings and water conservancy and hydropower construction. The large turning section of the middle and lower reaches of the Yarlung Zangbo River, Linzhi, Tibet, not only contains abundant energy mineral resources, but also contains abundant resources of energy and mineral resources. But it is also the most abundant River Basin in China. However, because the area is located in the Yarlung Zangbo Suture Zone, the tectonic movement is strong, the fracture development is more, and the high mountain and Canyon geomorphology is widely developed and the Quaternary cover is deep. It has brought great difficulty to the study of the hidden fault in this area, and it has become the construction of various projects in this area. Therefore, the detection and research of the hidden faults in this area are of great significance to the location of water conservancy and hydropower projects, the exploration of energy and mineral resources, and the construction of basic engineering. In this paper, the National Natural Science Foundation Project of the National Natural Science Project: the study of the underground gas field of hidden geological bodies and faults (project number: 41074094); the national hydropower Consultant The project of Chengdu survey and Design Research Institute of the group: under the support of the research project of the fault structure characteristics of the Milin earthing fault in the middle and lower reaches of the Yarlung Zangbo River, with the support of the research project of the characteristics of the fracture structure, such as the Yin song region of Tibet Milin and the zinla area in Linzhi, the geological structure characteristics of the work area are combined with the geological structure characteristics of the industrial area. In order to determine the location and direction of concealed faults in accordance with the research results of the predecessors, the detection and demonstration of the hidden faults such as grounding - GA - GA fracture, Zang - BA fault - column fault and so on in this area are carried out in order to provide a reference material for the location selection of the national water conservancy construction project. With the specific situation of the hidden fault, 12 measuring lines are arranged in two measured areas, including 7 Linzhi jade pine measuring areas and 5 lines in Milin color jella test area, 374 measuring points of ground gas measurement and 19 measuring points of radon gas measurement are carried out. 374 groups of ground gas analysis data are obtained. The data of each group are processed and analyzed and referenced by the processing and analysis of the measured data. On the basis of this, the multivariate statistical analysis is used to study the multivariate statistical characteristics of abnormal regions, and the activity strength of hidden faults is compared and analyzed by fuzzy discrimination. The feasibility of judging the activity of hidden faults by the ground gas field is discussed. 1, in the quaternary system, it is widely distributed in the quaternary system, the cover layer is deep and the fault is mostly concealed fault. The application of earth gas measurement to the detection of hidden faults in the river bed area is an effective method. Some trace elements (rare earth elements, Y, Rb, U) and rock forming elements (Cr, Mn, Zn) have obvious abnormal high values above the suspected hidden faults, which are more than 2 times of the background values, which have a good indication of the hidden faults to some extent.2, according to the ground gas and radon in the Linzhi jade pine survey area. The results of gas measurement, combined with geological survey, preliminarily determined that the anomalous section of the right bank of the Yarlung Zangbo River has an abnormal section PM01, PM02 and PM04 anomaly points as the location of the earthing - GA fault, and there is no fault in the left bank river beach, while the MI Lin zera survey area is in the abnormal section PM12, and the PM14 anomaly point may be the Zang Ba consciousness column and its branch fault pass. Over location.3, through the combination of cluster analysis, trace element rare earth distribution and other multivariate statistical methods, the element correlation and combination characteristics of abnormal region are revealed. It shows that the two regions have a large similarity in Y, Mn, and REE, and the contrast analysis of different fractured ground gas anomalies and the use of fuzziness. The discriminant method is used to explore the activity of the fault in the ground fault of the jade pine area, and the characteristics of the fault activity are weak. It shows that the size of the abnormal contrast of the ground gas element can reflect the active strength of the fault, and the abnormal contrast is positively related to the fault activity.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P632.5

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