GEOCHEMISRY OF THE MYLONITIZED SILICEOUS BANDED LIMESTONE IN CENTRAL LANGSHAN AREA, INNER MONGOLIA

LIU Shao-chang; ZHOU Yang; LI Hao; DAI Bo-yang; MING Xiao-na; YANG Jian-qiang

doi:10.13686/j.cnki.dzyzy.2020.04.003

2020 Vol. 29, No. 4

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Article navigation > Geology and Resources > 2020 > 29(4): 319-326, 318

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LIU Shao-chang, ZHOU Yang, LI Hao, DAI Bo-yang, MING Xiao-na, YANG Jian-qiang. GEOCHEMISRY OF THE MYLONITIZED SILICEOUS BANDED LIMESTONE IN CENTRAL LANGSHAN AREA, INNER MONGOLIA[J]. Geology and Resources, 2020, 29(4): 319-326, 318. doi: 10.13686/j.cnki.dzyzy.2020.04.003

Citation:

LIU Shao-chang, ZHOU Yang, LI Hao, DAI Bo-yang, MING Xiao-na, YANG Jian-qiang. GEOCHEMISRY OF THE MYLONITIZED SILICEOUS BANDED LIMESTONE IN CENTRAL LANGSHAN AREA, INNER MONGOLIA[J]. Geology and Resources, 2020, 29(4): 319-326, 318. doi: 10.13686/j.cnki.dzyzy.2020.04.003

GEOCHEMISRY OF THE MYLONITIZED SILICEOUS BANDED LIMESTONE IN CENTRAL LANGSHAN AREA, INNER MONGOLIA

1.
Yunnan Earthquack Agency, Kunming 650224, China
2.
Yunnan Gold Mining Group Co., Ltd., Kunming 650224, China

More Information

Corresponding author: ZHOU Yang, 19695535@qq.com

Received Date: 07 January 2020

Revised Date: 02 April 2020

Publish Date: 28 August 2020

Abstract

Abstract

The Langshan tectonic belt is an important part of the giant orogenic belt in the north margin of North China Platform, with ductile shear zone as one of the major structural styles, reflecting deep structure of the crust. The geochemical characteristics of the mylonitized siliceous banded limestone in the southwest of Langshan Ⅱ ductile shear zone are discussed to study the composition changes of the mylonitized rock from protolith in different deformation strength. The analysis results show that, compared with the content of the protolith, there are differences of major and trace elements in the siliceous banded limestone by deformation strength. Among the major elements of deformed rocks, only CaO is the exported component, all the others are imported ones. The trace elements such as Rr, Sr, Ba, Pb, Ti, Cr, Cu, Nb, Ta, Zr and Hf are enriched and Ni relatively deficient. The REE distribution patterns of deformed siliceous banded limestone and protolith are basically consistent, which are characterized by right-dipping curves with enrichment of LREEs and depletion of HREEs, and obvious negative Eu anomaly, indicating the REEs have relative stability and homology during ductile shearing.
- mylonitization /
- siliceous banded limestone /
- ductile shear zone /
- geochemistry /
- Langshan tectonic belt /
- Inner Mongolia

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References

[1]	内蒙古自治区地质矿产局.内蒙古自治区区域地质志[M].北京:地质出版社, 1991. Google Scholar
[2]	任纪舜, 姜春发, 张正坤, 等.中国大地构造及其演化[M].北京:科学出版社, 1980. Google Scholar
[3]	李春昱, 王荃, 刘雪亚, 等.亚洲大地构造图(1:800万)及其说明书[M].北京:地图出版社, 1982. Google Scholar
[4]	田健, 滕学建, 刘洋, 等.内蒙古狼山地区早二叠世花岗闪长岩的年代学、地球化学特征及其构造背景[J].中国地质, 2020, 47(3):767-781. Google Scholar
[5]	赵衡, 张进, 李岩峰, 等.内蒙古狼山地区新生代断层活动特征:对正断层生长的限定[J].中国地质, 2019, 46(6):1433-1453. Google Scholar
[6]	彭润民, 翟裕生, 王建平, 等.内蒙狼山新元古代酸性火山岩的发现及其地质意义[J].科学通报, 2010, 55(26):2611-2620. Google Scholar
[7]	胡骁, 许传诗, 牛树银.华北地台北缘早古生代大陆边缘演化[M].北京:北京大学出版社, 1990. Google Scholar
[8]	Chen Y P, Wei C J, Zhang J R, et al. Metamorphism and zircon U-Pb dating of garnet amphibolite in the Baoyintu Group, Inner Mongolia[J]. Science Bulletin, 2015, 60(19):1698-1707. doi: 10.1007/s11434-015-0890-0 CrossRef Google Scholar
[9]	Wang Z Z, Han B F, Feng L X, et al. Geochronology, geochemistry and origins of the Paleozoic-Triassic plutons in the Langshan area, western Inner Mongolia, China[J]. Journal of Asian Earth Sciences, 2015, 97:337-351. doi: 10.1016/j.jseaes.2014.08.005 CrossRef Google Scholar
[10]	王楫, 李双庆, 王保良, 等.狼山-白云鄂博裂谷系[M].北京:北京大学出版社, 1992:1-136. Google Scholar
[11]	Zhai M G, Santosh M. The early Precambrian odyssey of the North China Craton:A synoptic overview[J]. Gondwana Research, 2011, 20(1):6-25. doi: 10.1016/j.gr.2011.02.005 CrossRef Google Scholar
[12]	Zhao G C, Cawood P A, Li S Z, et al. Amalgamation of the North China Craton:Key issues and discussion[J]. Precambrian Research, 2012, 222-223:55-76. doi: 10.1016/j.precamres.2012.09.016 CrossRef Google Scholar
[13]	Wang Z Z, Han B F, Feng L X, et al. Tectonic attribution of the Langshan area in western Inner Mongolia and implications for the Neoarchean-Paleoproterozoic evolution of the western North China Craton:evidence from LA-ICP-MS zircon U-Pb dating of the Langshan basement[J]. Lithos, 2016, 261:278-295. doi: 10.1016/j.lithos.2016.03.005 CrossRef Google Scholar
[14]	初航, 王惠初, 魏春景, 等.内蒙古狼山巴音前达门地区黑云斜长片麻岩年代学研究及板块归属[J].地质学报, 2018, 92(12):2410-2419. Google Scholar
[15]	周建波, 胡克, 孙加鹏, 等.韧性剪切带的地球化学变异研究——以胶南造山带北缘剪切带为例[J].地质地球化学, 1994(4):27-32. Google Scholar
[16]	杨福新.内蒙狼山地区糜棱岩岩石特征及构造意义[J].西北地质, 1998, 19(1):1-8. Google Scholar
[17]	彭润民, 翟裕生, 韩雪峰, 等.内蒙古狼山造山带构造演化与成矿响应[J].岩石学报, 2007, 23(3):679-688. Google Scholar
[18]	Hu J M, Gong W B, Wu S J, et al. LA-ICP-MS zircon U-Pb dating of the Langshan Group in the northeast margin of the Alxa block, with tectonic implications[J]. Precambrian Research, 255:756-770. doi: 10.1016/j.precamres.2014.08.013 CrossRef Google Scholar
[19]	彭润民.内蒙东升庙矿区狼山群中石英角斑岩的发现及意义[J].矿床地质, 1993, 12(3):273-283, 286. Google Scholar
[20]	Peng R M, Zhai Y S, Wang Z G, et al. Discovery of double-peaking potassic volcanic rocks in Langshan Group of the Tanyaokou hydrothermal-sedimentary deposit, Inner Mongolia, and its indicating significance[J]. Science China Series D:Earth Sciences, 2005, 48(6):822-833. doi: 10.1360/03yd0510 CrossRef Google Scholar
[21]	Darby B J, Ritts B D. Mesozoic structural architecture of the Lang Shan, North-Central China:Intraplate contraction, extension, and synorogenic sedimentation[J]. Journal of Structural Geology, 2007, 29(12):2006-2016. doi: 10.1016/j.jsg.2007.06.011 CrossRef Google Scholar
[22]	Dan W, Li X H, Wang Q, et al. An Early Permian (ca. 280 Ma) silicic igneous province in the Alxa Block, NW China:A magmatic flare-up triggered by a mantle-plume?[J]. Lithos, 2014, 204:144-158. doi: 10.1016/j.lithos.2014.01.018 CrossRef Google Scholar
[23]	刘耀荣.湘中雪家坡脆韧性剪切构造岩地球化学特征[J].中国区域地质, 1997, 16(1):3-8. Google Scholar