發(fā)布時(shí)間：2018-03-26 13:37

  本文選題：寧東煤田　切入點(diǎn)：構(gòu)造演化　出處：《煤炭科學(xué)技術(shù)》2017年06期

【摘要】：為探討構(gòu)造演化過程對(duì)煤系現(xiàn)今賦存狀況的影響,基于構(gòu)造動(dòng)力學(xué)背景,采用構(gòu)造沉降史與構(gòu)造應(yīng)力場(chǎng)恢復(fù),對(duì)寧東煤田南北段的構(gòu)造演化過程及分異成因進(jìn)行了綜合分析。結(jié)果表明:寧東煤田不同時(shí)期受不同構(gòu)造單元聯(lián)合控制,構(gòu)造演化過程復(fù)雜;煤田構(gòu)造沉降史存在東西向分異,由于所處逆沖推覆構(gòu)造系統(tǒng)位置不同,西部抬升剝蝕量較東部大;煤田構(gòu)造應(yīng)力場(chǎng)存在明顯南北向分異,由于分屬不同逆沖推覆構(gòu)造系統(tǒng),各期應(yīng)力場(chǎng)南北部最大主應(yīng)力方向不甚相同,其構(gòu)造演化分異主要受北祁連褶皺帶和阿拉善地塊的控制影響,南北兩段分屬六盤山和賀蘭山逆沖推覆構(gòu)造系統(tǒng),西部受力作用較東部強(qiáng)烈。
[Abstract]:In order to investigate the influence of tectonic evolution on the present occurrence of coal measures, based on the background of tectonic dynamics, tectonic subsidence history and tectonic stress field restoration are adopted. The structural evolution process and differentiation origin of the northern and southern section of Ningdong coalfield are comprehensively analyzed. The results show that the tectonic evolution process of Ningdong coalfield in different periods is controlled by different tectonic units, and the tectonic evolution process is complicated, and the tectonic subsidence history of Ningdong coalfield has east-west differentiation. Because of the different positions of the thrust nappe structure system, the uplift and denudation amount in the west is larger than that in the eastern part, and the tectonic stress field of the coal field is obviously different from the north to the south, because it belongs to different thrust nappe structure system. The direction of the maximum principal stress in the north and south part of the stress field is different, and the tectonic evolution and differentiation are mainly controlled by the North Qilian fold belt and the Alashan block. The north and south sections belong to the Liupanshan and Helan mountain thrust nappe systems respectively, and their tectonic evolution and differentiation are mainly controlled by the northern Qilian fold belt and the Alashan block. The force in the west is stronger than that in the east.
【作者單位】： 中國(guó)礦業(yè)大學(xué)(北京)煤炭資源與安全開采國(guó)家重點(diǎn)實(shí)驗(yàn)室;《中國(guó)學(xué)術(shù)期刊(光盤版)》電子雜志社有限公司;
【基金】：中國(guó)地質(zhì)調(diào)查局地質(zhì)調(diào)查資助項(xiàng)目(12120114012201)
【分類號(hào)】：P618.11

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