谱学分析在造山带硅质岩中的应用及其地质意义

doi:10.3964/j.issn.1000-0593(2019)04-1128-08

Abstract
References
Related Citation (15)

Download: PDF (3266 KB)
Export: BibTeX | EndNote (RIS)

Abstract The Devonian cherts profile was developed in Lvhe area, Xunyang basin of southern Qinling orogenic belt, and the microfabric features based on spectroscopy characteristics clearly recorded information of diagenesis and later stage evolution of the cherts. Cherts in Lvhe area, Xunyang basin of southern Qinling orogenic belt were taken as object, by means of Raman spectroscopy，Fourier transform infrared spectroscopy and X-ray powder diffraction，and the results of this study showed that：low temperature quartz and a small quantity of carbonate minerals were the two main mineral phases of the cherts, and XRD analysis further proved the carbonate minerals were dolomites. Within the cherts in Lvhe area，Gauss fitting FWHM and Area values of the 463 cm^-1 Raman shift of SiO₂ texture confirmed that recrystallization had occurred in the SiO₂ minerals. Alone with this process, variations of degree of order were triggered by fluid effects as well as the quartz itself. During the recrystallization process of the quartz, degree of order went up. The cherts were altered by later fluids, apart from the intersected late vein, the alteration reflected in that the closer to the edge of the fluids in the quartz, the higher the crystallinity and degree of order. In this study, alteration of cherts made by orogeny mainly reflected in two aspects：on the one hand，tectonic stress destroyed the continuity of the cherts and provides space for migration and intersection of later stage hydrothermal fluids；On the other hand，participation of the late fluids accelerated the recrystallization of quartz. In this study, infrared spectroscopy is capable of identifying mineral structure type systematically, and Raman spectrum analysis can reveal in situ microfabric characteristics, and XRD shows significant advantage in discriminating trace impurity minerals in cherts. These spectroscopy methods provide important demonstrations in studying the diagenetic evolution of the cherts.

Key words：Qinling orogenic belt; Cherts; Microfabric features; Fluids; Recrystallization

Received: 2018-03-03 Accepted: 2018-07-19

ZTFLH:

P574

Corresponding Authors: ZHOU Yong-zhang, LI Hong-zhong E-mail: zhouyz@mail.sysu.edu.cn；lihongzhong01@aliyun.com

Cite this article:

URL:

https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2019)04-1128-08 OR https://www.gpxygpfx.com/EN/Y2019/V39/I04/1128

[1] Li H Z，Zhai M G，Zhang L C，et al. The Scientific World Journal, 2013，2013: 949603.
[2] XUE Chun-ji，LIU Shu-wen，FENG Yong-zhong，et al（薛春纪，刘淑文，冯永忠，等）. Geological Bulletin of China（地质通报），2005，24（10-11）：927.
[3] LÜ Zhi-cheng，LIU Cong-qiang，LIU Jia-Ju，et al（吕志成，刘丛强，刘家军，等）. Acta Geologica Sinica（地质学报），2004，78（3）：390.
[4] YANG Zhi-jun，ZHOU Yong-zhang，ZHANG Cheng-bo，et al（杨志军，周永章，张澄博，等）. Bulletin of Mineralogy Petrology & Geochemistry（矿物岩石地球化学通报），2003，22（3）：255.
[5] ZHOU Yong-zhang，FU Wei，YANG Zhi-jun，et al（周永章，付伟，杨志军，等）. Acta Petrologica Sinica（岩石学报），2006，22（3）：742.
[6] LI Hong-zhong，ZHOU Yong-zhang，YANG Zhi-jun，et al（李红中，周永章，杨志军，等）. Earth Science Frontiers（地学前缘），2010，17（4）：290.
[7] LI Hong-zhong，ZHOU Yong-zhang，YANG Zhi-jun，et al（李红中，周永章，杨志军，等）. Earth Science（地球科学—中国地质大学学报），2009，34（2）：299.
[8] LI Hong-zhong，ZHOU Yong-zhang，YANG Zhi-jun，et al（李红中，周永章，杨志军，等）. Journal of Jilin University·Earth Science Edition（吉林大学学报·地球科学版），2011，41（3）：715.
[9] Li H Z，Zhai M G，Zhang L C，et al. The Scientific World Journal，2014，2014：780910.
[10] Li H Z，Zhai M G，Zhang L C，et al. Journal of Asian Earth Sciences，2014，94：267.
[11] Lynne B Y，Campbell K A，Moore J N，et al. Sedimentary Geology，2005，179（3-4）：249.
[12] Ostroumov M，Faulques E，Lounejeva E. Comptes Rendus Geoscience，2002，334（1）：21.
[13] Champagnon B，Panczer G，Chemarin C，et al. Journal of Non-Crystalline Solids，1996，196，221.
[14] Arguirov，Mchedlidze T，Akhmetov V D，et al. Applied Surface Science，2007，254：1083.
[15] YANG Zhi-jun，LI Hong-zhong，LIN Feng，et al（杨志军，李红中，林峰，等）. Superhard Material Engineering（超硬材料工程），2009，21（6）：4.
[16] CHEN Quan-li，QI Li-jian，ZHANG Yan（陈全莉，亓利剑，张琰）. Journal of Gems & Gemmology（宝石和宝石学杂志），2006，8（1）：9.
[17] CHEN Rong-hua，XU Jian，MENG Yi，et al（陈荣华，徐建，孟翊，等）. Acta Oceanologica Sinica（海洋学报），2003，25(2)：48.
[18] Takeshita T，Hara I. Journal of Structural Geology，1998，20(4)：417.
[19] Murray R W. Sedimentary Geology，1994，90（3-4）：213.
[20] Sugisaki R. The Journal of Geology，1984，92（3）：235.
[21] LIU Jia-jun，ZHENG Ming-hua，LIU Jian-ming，et al（刘家军，郑明华，刘建明，等）. Geotectonica et Metallogenia（大地构造与成矿学），1997，21（4）：307.
[22] Sugisaki R，Kinoshita T. Geol. Surv. Jpn., Cruise Rep.，1982，18：293.