X-Ray Diffraction and Infrared Spectrum Analysis of Fault Gouge in Wenchuan Seismic Belt
WANG Zheng-yang, CAO Jian-jin*, LUO Song-ying, LIAO Yi-peng
Guangdong Key Laboratory of Geological Process and Mineral Resources Exploration, Department of Earth Sciences, Sun Yat-Sen University, Guangdong 510275, China
Abstract：Wenchuan earthquake produced a series of co-seismic surface ruptures in Leigu and Zhaojiagou, and we collected samples of co-seismic fault gouge in the surface ruptures as well as the old gouge in the fault of Nanba. Testing The new and old fault gouge was tested with X-ray diffraction and infrared absorption spectra, and its characteristics such as mineral compositions, clay mineral contents and combinations were comprehensively analyzed. The results display obvious differences between the new and old fault gouge, showing that the old fault gouge is mainly composed of wall rock debris or milled powders, while the main components of new fault gouge are clay minerals. The assemblage of clay minerals composition shows that the environment of the fault activity was mainly warm and humid, and the clay minerals were mainly transformed by low temperature and low pressure dynamic metamorphism. And this also partly indicates that the latest way of the fault activity in this area may be a creeping. However the previous researches on the fault gouge of Wenchuan earthquake fault zone are mainly focused on its mechanical properties as well as its texture and structure, the research in this paper is to determine the physical and chemical environment of fault activity through the mineral compositions and clay mineral contents in the fault gouge characteristics, and this research has important scientific significance to the researches on the evolution of the fault environment and the activity mechanism of the earthquake.
Key words：Wenchuan earthquake;Fault gouge;X-ray diffraction;Infrared absorption spectra;Clay mineral
王正阳，曹建劲*，罗松英，廖宜鹏 . 汶川地震带断层泥X射线衍射和红外光谱分析 [J]. 光谱学与光谱分析, 2014, 34(05): 1416-1420.
WANG Zheng-yang, CAO Jian-jin*, LUO Song-ying, LIAO Yi-peng . X-Ray Diffraction and Infrared Spectrum Analysis of Fault Gouge in Wenchuan Seismic Belt . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(05): 1416-1420.
[1] ZHOU Yun-hao, ZHUANG Kun-yuan(周云好，庄昆元). Acta Seismologica Sinica(地震学报), 1990，12(3): 248. [2] ZHANG Bing-liang, LIU Gui-fen, FANG Zhong-jing, et al(张秉良，刘桂芬，方仲景, 等). Seismology and Geology (地震地质), 1994，16(1): 89. [3] MA Jing, D Mole, J Berry(马 瑾，D.莫尔，J.拜尔利). Earthquake Research in China(中国地震), 1985, 1(1): 47. [4] LIN Chuan-yong, SHI Lan-bin, LIU Xing-song, et al(林传勇，史兰斌，刘行松, 等). Earthquake Research in China(中国地震), 1995, 11(1): 26. [5] LI Hai-bing, XU Zhi-qin, WANG Huan, et al(李海兵，许志琴，王 焕, 等). Geology in China(中国地质), 2013, 40(1): 121. [6] LI Yong, HUANG Run-qiu, Densmore A L, et al(李 勇，黄润秋，Densmore A L, 等). Journal of Sichuan University·Engineering Science Edition(四川大学学报·工程科学版), 2009，41(3): 7. [7] LI Yong, HUANG Run-qiu, ZHOU Rong-jun, et al(李 勇，黄润秋，周荣军, 等). Journal of Engineering Geology(工程地质学报), 2009，17(1): 3. [8] Der Hilst B H. GSA Today, 2008, 18(7): 5. [9] AN Qi-mei, DING Li-feng, WANG Hai-zhong, et al(安其美，丁立丰，王海忠, 等). Journal of Geodesy and Geodynamics(大地测量与地球动力学), 2004, 24(2): 115. [10] HE Chang-rong, DANG Jia-xiang, ZHOU Yong-sheng, et al(何昌荣，党嘉祥，周永胜, 等). Bulletin of Mineralogy, Petrology and Geochemistry(矿物岩石地球化学通报), 2011，(30): 197. [11] FU Bi-hong, WANG Ping, KONG Ping, et al(付碧宏，王 萍，孔 屏, 等). Acta Petrologica Sinica(岩石学报), 2008, 24(10): 2237. [12] DANG Jia-xiang, ZHOU Yong-sheng, HAN Liang, et al(党嘉祥，周永胜，韩 亮, 等). Seismology and Geology(地震地质), 2012，34(1): 17. [13] WEN Lu, LIANG Wan-xue, ZHANG Zheng-gang, et al(闻 辂，梁婉学，章正刚, 等). Minerals Infrared Spectroscopy(矿物红外光谱学). Chongqing: Chongqing University Press(重庆市: 重庆大学出版社), 1988. [14] PENG Wen-shi, LIU Gao-kui(彭文世，刘高魁). Pictorial Handbook of Infrared Spectra of Mineral(矿物红外光谱图集). Beijing: Science Press(北京: 科学出版社), 1982. 508. [15] WANG Yu, ZHANG Yi-ping, CHEN Si-gen(王 玉，张一平，陈思根). Journal of Northwest A & F University·Natural Science Edition(西北农林科技大学学报·自然科学版)), 2003，31(1): 57. [16] YIN Ke, HONG Han-lie, LI Rong-biao, et al(殷 科，洪汉烈，李荣彪, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2012, 32(10): 2765. [17] CAI Jia, LIU Chun-hua, YU Xiao-yan(蔡 佳，刘春花，余晓艳). Journal of Gems & Gemmology(宝石和宝石学杂志)，2008，10(2)：13. [18] FU Guo-fei, XU Hong-wu(傅国飞，徐洪武). Chinese Journal of Geology(Scientia Geologica Sinica)(地质科学), 1992，1: 50. [19] ZHANG Bing-liang, HE Chang-rong, LIU Xing-song(张秉良，何昌荣，刘行松). Chinese Journal of Geology(Scientia Geologica Sinica)(地质科学), 2000，35(2): 197. [20] TANG Yan-jie, JIA Jian-ye, XIE Xian-de(汤艳杰，贾建业，谢先德). Earth Science Frontiers(地学前缘), 2002, 9(2): 337. [21] Moore D E, Summers R, Byerlee J D. Journal of Structural Geology, 1989, 11(3): 329.
