新疆阿合奇地区志留系砂岩地球化学特征及大地构造背景<sup>*</sup>

doi:10.7605/gdlxb.2018.02.020

Abstract
Figure/Table
References(0)
Related Citation (9)
Read Tracking
Download Tracking

Download: PDF (2334 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS) Supporting Info

Abstract

The South Tianshan Orogenic Belt is located between the Tarim Plate and Yili-Central Tianshan Plate. The tectonic evolution of the South Tianshan Ocean in the Paleozoic has long been debated. Litho-geochemical features of the major and trace elements of the Silurian sandstones from Akeqi area, northwestern margin of the Tarim Plate of Xinjiang,show that Chondrite-normalized REE distribution patterns of the samples are all right skewed, with high(La/Yb)_N value, low δEu value, and negative Ce anomaly. The maturity of the sandstones from the Middle to Top Silurian Tataertage Formation is higher than the samples from the Lower Silurian Kepingtage Formation. The provenance and tectonic setting of the sandstones were evaluated using ternary diagrams that highlight their geochemical characteristics. The results suggest that the provenance of the Akeqi area gradually transformed from active provenance to stable provenance. Some sediments from the Kepingtage Formation are sourced from active continental margin and continental island arc, indicating felsic igneous provenance; Sediments from the Tataertage Formation were sourced from quartzite sediment provenance of mature continent. Combined with widely distributed parallel unconformities between the Ordovician and the Lower Silurian, it can be inferred that the Akeqi area was located in an active continental margin, the South Tianshan Ocean subducted southward beneath the Tarim Plate shortly during the Late Ordovician, which provided the active provenance for the study area. From the Early Silurian, as southwards subduction ended, the tectonic setting of Akeqi area transformed from active continental margin to stable passive continental margin. Sediments from active and stable provenances gradually decreased and increased, respectively. During the deposition of Middle to Top Silurian succession, tectonic setting of the Akeqi area completely transformed to stable passive continental margin, so that sediments were exclusively sourced from stable provenances. In conclusion, this study proposes that bidirectional subduction was developed during the evolution of the South Tianshan Ocean within the Paleozoic.

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	Chen Xiao-Shuang
	Lv Ao
	Song He-Min
	Liu Lei
	Yang Bao-Zhong
	Hou Hong-Xing

Key words： Xinjiang Akeqi area Silurian South Tianshan Ocean bidirectional subduction active continental margin

Received: 12 May 2017

ZTFLH:	P542
	P597

Fund:

[Financially supported by the Geological Survey Collaboration Projects of China Geological Survey Bureau “Comprehensive Research of Late Paleozoic Strata in Kalpin Region,Xinjiang”(No.2015010038)]

Corresponding Authors: Yang Bao-Zhong,born in 1969,is an associate professor at the School of Earth Sciences,China University of Geosciences(Wuhan). He is currently engaged in the research of sedimentary geology. E-mail: Bzyang@cug.edu.cn.

About author: Chen Xiao-Shuang,born in 1992,is a master degree candidate at the School of Earth Sciences,China University of Geosciences(Wuhan). He is mainly engaged in the research of tectonic geology. E-mail: 823376471@qq.com.About the corresponding author Yang Bao-Zhong,born in 1969,is an associate professor at the School of Earth Sciences,China University of Geosciences(Wuhan). He is currently engaged in the research of sedimentary geology. E-mail: Bzyang@cug.edu.cn.

Cite this article:

Chen Xiao-Shuang,Lv Ao,Song He-Min et al. Geochemical characteristics and tectonic history of the Silurian sandstones in Akeqi area,Xinjiang[J]. JOPC, 2018, 20(2): 271-284.

URL:

http://journal09.magtechjournal.com/gdlxb/EN/10.7605/gdlxb.2018.02.020 OR http://journal09.magtechjournal.com/gdlxb/EN/Y2018/V20/I2/271

[1] 蔡东升,卢华复. 2012. 南天山古生代板块构造演化. 地质论评, 41(5): 432-443. [Cai D S,Lu H F. 2012. Paleozoic plate tectonic evolution of southern Tianshan. Geological Review, 41(5): 432-443]
[2] 常健,邱楠生,李佳蔚. 2012. 塔里木柯坪地区下志留统碎屑锆石U-Pb年代学特征及其地质意义. 地球科学与环境学报, 34(3): 32-43. [Chang J,Qiu N S,Li J W. 2012. U-Pb dating of detrital zircon from Lower Silurian in Keping area of Tarim Basin and its geological implication. Journal of Earth Sciences and Environment, 34(3): 32-43]
[3] 高俊,汤耀庆,赵民,王军. 1995a. 新疆南天山蛇绿岩的地质地球化学特征及形成环境初探. 岩石学报,11(S1): 85-97. [Gao J,Tang Y Q,Zhao M,Wang J. 1995a. The preliminary studies on tectonic environment of formation and geological and geochemical characters of ophiolites,south Tianshan Mountains,Xinjiang. Acta Petrologica Sinica,11(S1): 85-97]
[4] 高俊,肖序常,汤耀庆,赵民,王军. 1995b. 西南天山构造地层学初步研究. 地层学杂志, 19(2): 122-128. [Gao J,Xiao X C,Tang Y Q,Zhao M,Wang J. 1995. Preliminary research on the tectonostratigraphy in the southwestern Tianshan Mountains. Journal of Stratigraphy, 19(2): 122-128]
[5] 高小芬,林晓,徐亚东,乐明亮. 2014. 南天山古生代—中生代沉积盆地演化. 地球科学, 39(8): 1119-1128. [Gao X F,Lin X,Xu Y D,Le M L. 2014. Evolution of sedimentary basins in south Tianshan during Paleozoic-Mesozoic. Earth Science, 39(8): 1119-1128]
[6] 郭春涛,李忠,高剑,董顺利. 2015. 塔里木盆地西北缘乌什地区石炭系沉积与碎屑锆石年代学记录及其反映的构造演化. 岩石学报, 31(9): 2679-2695. [Guo C T,Li Z,Gao J,Dong S L. 2015. Depositional and detrital zircon geochronological records of Carboniferous System in Wushi,northwest Tarim Basin: Implications for tectonic evolution. Acta Petrologica Sinica, 31(9): 2679-2695]
[7] 郭瑞清,尼加提·阿布都逊,秦切,贾晓亮,朱志新,王克卓,李亚萍. 2013a. 新疆塔里木北缘志留纪花岗岩类侵入岩的地质特征及构造意义. 地质通报,32(2/3): 220-238. [Guo R Q,Nijiati A,Qin Q,Jia X L,Zhu Z X,Wang K Z,Li Y P. 2013a. Geological characteristics and tectonic significance of Silurian granitic intrusions in the northern Tarim craton,Xinjiang. Geological Bulletin of China,32(2/3): 220-238]
[8] 郭瑞清,秦切,木合塔尔·扎日,赵亮亮,孙敏佳,魏震. 2013b. 新疆库鲁克塔格西段奥陶纪花岗岩体地质特征及构造意义. 地学前缘, 20(4): 251-263. [Guo R Q,Qin Q,Muhetaer Z,Zhao L L,Sun M J,Wei Z. 2013b. Geological characteristics and tectonic significance of Ordovician granite intrusions in the western segment of Quruqtagh,Xinjiang. Earth Science Frontiers, 20(4): 251-263]
[9] 何碧竹,焦存礼,许志琴,刘士林,蔡志慧,李海兵,张淼. 2013. 不整合结构构造与构造古地理环境: 以加里东中期青藏高原北缘及塔里木盆地为例. 岩石学报, 29(6): 2184-2198. [He B Z,Jiao C L,Xu Z Q,Liu S L,Cai Z H,Li H B,Zhang M. 2013. Unconformity structural architecture and tectonic paleo-geographic environment: A case of the Middle Caledonian on the northern margin of Tibet Plateau and Tarim Basin. Acta Petrologica Sinica, 29(6): 2184-2198]
[10] 姜常义,穆艳梅,赵晓宁,白开寅,张虹波. 2001. 塔里木板块北缘活动陆缘型侵入岩带的岩石学与地球化学. 中国区域地质, 20(2): 158-163. [Jiang C Y,Mu Y M,Zhao X N,Bai K Y,Zhang H B. 2001. Petrology and geochemistry of an active continental-margin intrusive rock belt on the northern margin of the Tarim plate. Regional Geology of China, 20(2): 158-163]
[11] 李路路,杨宝忠,尹永会,刘龙龙,王兵. 2017. 新疆柯坪地区下志留统柯坪塔格组物源分析: 来自地球化学、锆石U-Pb年代学的约束. 地质科技情报, 36(2): 1-12. [Li L L,Yang B Z,Yin Y H,Liu L L,Wang B. 2017. Geochemical characteristics and provenance analysis of sandstone in Silurian Kepingtage Formation in Keping area,Xinjiang. Geological Science and Technology Information, 36(2): 1-12]
[12] 李曰俊,杨海军,赵岩,罗俊成,郑多明,刘亚雷. 2009. 南天山区域大地构造与演化. 大地构造与成矿学, 33(1): 94-104. [Li Y J,Yang H J,Zhao Y,Luo J C,Zheng D M,Liu Y L. 2009. Tectonic framework and evolution of south Tianshan,NW China. Geotectonica et Metallogenia, 33(1): 94-104]
[13] 林畅松,李思田,刘景彦,钱一雄,罗宏,陈建强,彭莉,芮志峰. 2011. 塔里木盆地古生代重要演化阶段的古构造格局与古地理演化. 岩石学报, 27(1): 210-218. [Lin C S,Li J T,Liu J Y,Qian Y X,Luo H,Chen J Q,Peng L,Rui Z F. 2011. Tectonic framework and paleogeographic evolution of the Tarim Basin during the Paleozoic major evolutionary stages. Acta Petrologica Sinica, 27(1): 210-218]
[14] 刘景彦,杨海军,杨永恒,蔡振忠,刘永权,芮志峰,苏真真. 2012. 塔里木盆地东北缘志留纪构造活动的U-Pb年代证据及盆内响应. 中国科学: 地球科学, 42(8): 1218-1233. [Liu J Y,Yang H J,Yang Y H,Cai Z Z,Liu Y Q,Rui Z F,Su Z Z. 2012. The U-Pb chronologic evidence and sedimentary responses of Silurian tectonic activities at northeastern margin of Tarim Basin. Science China: Earth Science, 42(8): 1218-1233]
[15] 刘晓煌,牛树银,张雄华,李保飞,张新勇,宋贺民,鲁世鹏,刘玖芬. 2013. 新疆西南天山哈拉奇地区古生代地层剖面中3个不整合面的确定及其意义. 西北地质, 46(4): 115-130. [Liu X H,Niu S Y,Zhang X H,Li B F,Zhang X Y,Song H M,Lu S P,Liu J F. 2013. The identification and its significance of the three unconformity surfaces of the Paleozoic stratigraphic profile in Halaqi area in southwestern Tianshan,Xinjiang. Northwestern Geology, 46(4): 115-130]
[16] 毛光周,刘池洋. 2011. 地球化学在物源及沉积背景分析中的应用. 地球科学与环境学报, 33(4): 337-348. [Mao G Z,Liu C Y. 2011. Application of geochemistry in provenance and depositional setting analysis. Journal of Earth Sciences and Environment, 33(4): 337-348]
[17] 牛露,于炳松,张文博. 2013. 塔里木盆地北部地区下志留统柯坪塔格组物源分析与物源区母岩年龄确定. 沉积学报, 31(3): 421-429. [Niu L,Yu B S,Zhang W B. 2013. Provenance analysis and dating of parent rocks of the sandstones from Kepingtage Formation(Silurian)in the northern Tarim Basin. Acta Sedimentologica Sinica, 31(3): 421-429]
[18] 王超,罗金海,车自成,刘良,张敬艺. 2009. 新疆欧西达坂花岗质岩体地球化学特征和锆石LA-ICP-MS定年: 西南天山古生代洋盆俯冲作用过程的启示. 地质学报, 83(2): 272-283. [Wang C,Luo J H,Che Z C,Liu L,Zhang J Y. 2009. Geochemical characteristics and U-Pb LA-ICP-MS zircon dating of the Oxidaban pluton from Xinjiang,China: Implications for a Paleozoic oceanic subduction process in southwestern Tianshan. Acta Geologica Sinica, 83(2): 272-283]
[19] 王庆同,杨宝忠,姜文钦,周发侨,张枭,王卫国. 2014. 新疆色帕巴衣地区志留纪柯坪塔格组笔石的发现. 地质通报, 33(1): 19-25. [Wang Q T,Yang B Z,Jiang W Q,Zhou F Q,Zhang X,Wang W G. 2014. The discovery of Silurian graptolites from the Kepingtage Formation in Sepabayi area,Xinjiang. Geological Bulletin of China, 33(1): 19-25]
[20] 王松. 2014. 南天山晚古生代—新生代沉积记录及其对构造演化的制约. 合肥工业大学博士论文: 1-126. [Wang S. 2014. Late Paleozoic to Cenozoic Sedimentary Record of the South Tianshan and Its Implications for Tectonic Evolution. Doctoral Dissertation of Hefei University of Technology: 1-126]
[21] 邬光辉,张宝收,郭春利,王成林,高辉. 2009. 塔里木盆地北部志留系碎屑锆石测年及其地质意义. 大地构造与成矿学, 33(3): 418-426. [Wu G H,Zhang B S,Guo C L,Wang C L,Gao H. 2009. Detrital zircon U-Pb dating for the Silurian in northern Tarim Basin and its significance. Geotectonica et Metallogenia, 33(3): 418-426]
[22] 邬光辉,孙建华,郭群英,唐涛,陈志勇,冯晓军. 2010. 塔里木盆地碎屑锆石年龄分布对前寒武纪基底的指示. 地球学报, 31(1): 65-72. [Wu G H,Sun J H,Guo Q Y,Tang T,Chen Z Y,Feng X J. 2010. The distribution of detrital zircon U-Pb ages and its significance to Precambrian basement in Tarim Basin. Acta Geoscientica Sinica, 31(1): 65-72]
[23] 熊小辉,肖加飞. 2011. 沉积环境的地球化学示踪. 地球与环境, 39(3): 405-414. [Xiong X H,Xiao J F. 2011. Geochemical indicators of sedimentary environments: A Summary. Earth and Environment, 39(3): 405-414]
[24] 张斌,陈文,喻顺,尹继元,李洁,孙敬博,杨莉,杨静. 2014. 南天山洋古生代期间俯冲作用过程探讨. 岩石学报, 30(8): 2351-2362. [Zhang B,Chen W,Yu S,Yin J Y,Li J,Sun J B,Yang L,Yang J. 2014. Subduction process of South Tianshan Ocean during Paleozoic. Acta Petrologica Sinica, 30(8): 2351-2362]
[25] 张鑫,张金亮,覃利娟. 2007. 塔里木盆地志留系柯坪塔格组砂岩岩石学特征与物源分析. 矿物岩石, 27(3): 106-115. [Zhang X,Zhang J L,Qin L J. 2007. Petrological characteristics and provenance analysis of sandstones in the Kepingtage Formation of Silurian in the Tarim Basin. Journal of Mineralogy and Petrology, 27(3): 106-115]
[26] 张英利,王宗起,闫臻,王涛. 2014. 新疆库鲁克塔格早志留世地层沉积学、物源分析新认识. 地质学报, 88(10): 1970-1980. [Zhang Y L,Wang Z Q,Yan Z,Wang T. 2014. New insights on sedimentology,provenance analysis of the Early Silurian in the Quruqtagh area,Xinjiang. Acta Geologica Sinica, 88(10): 1970-1980]
[27] 张宇航,汤良杰,云露,谢大庆,邱海峻,蒋华山. 2012. 塔里木盆地关键构造变革期不整合特征及其地质意义. 世界地质, 31(2): 306-314. [Zhang Y H,Tang L J,Yun L,Xie D Q,Qiu H J,Jiang H S. Unconformity characteristics and geological significance in key tectonic revolution stage of Tarim Basin. Global Geology, 31(2): 306-314]
[28] 周科. 2014. 常量元素与微量元素特征在物源分析中的应用. 辽宁化工, 43(4): 515-520. [Zhou K. 2014. Application of the characteristics of major elements and trace elements in provenance analysis. Liaoning Chemical Industry, 43(4): 515-520]
[29] 周新源,李曰俊,王招明,李宇平,罗俊成,张博. 2002. 塔里木盆地西北缘下志留统沉积构造背景初探. 地质科学,37(S1): 57-63. [Zhou X Y,Li Y J,Wang Z M,Li Y P,Luo J C,Zhang B. 2002. A preliminary study on tectonic setting of the Lower Silurian in NW Tarim. Chinese Journal of Geology,37(S1): 57-63]
[30] Allègre C J,Minster J F. 1978. Quantitative models of trace element behavior in magmatic processes. Earth and Planetary Science Letters, 38(1): 1-25.
[31] Bhatia M R. 1983. Plate tectonics and geochemical composition of sandstones. The Journal of Geology, 91(6): 611-627.
[32] Bhatia M R,Crook K A W. 1986. Trace element characteristics of graywackes and tectonic setting discrimination of sedimentary basins. Contributions to Mineralogy and Petrology, 92(2): 181-193.
[33] Charvet J,Shu L S,Charvet S L,Wang B,Faure M,Cluzel D,Chen Y,Jong K D. 2011. Palaeozoic tectonic evolution of the Tianshan belt,NW China. Science China: Earth Sciences, 54(2): 166-184.
[34] Condie K C,Noll J P D,Conway C M. 1992. Geochemical and detrital mode evidence for two sources of Early Proterozoic sedimentary rocks from the Tonto Basin Supergroup,central Arizona. Sedimentary Geology, 77: 51-76.
[35] Gu X X,Liu J M,Zheng M H,Tang J X,Qi L. 2002. Provenance and tectonic setting of the Proterozoic turbidites in Hunan,South China: Geochemical evidence. Journal of Sedimentary Research, 72(3): 393-407.
[36] Han B F,He G Q,Wang X C,Guo Z J. 2011. Late Carboniferous collision between the Tarim and Kazakhstan-Yili terranes in the western segment of the South Tian Shan Orogen,Central Asia,and implications for the northern Xinjiang,western China. Earth-Science Reviews, 109(3): 74-93.
[37] Ma X,Shu L,Meert J G,Ji L. 2013. The Paleozoic evolution of Central Tianshan: Geochemical and geochronological evidence. Gondwana Research, 23(2): 797-819.
[38] Roser B P,Korsch R J. 1986. Determination of tectonic setting of sandstone-mudstone suites using SiO 2 content and K 2 O/Na 2 O ratio. The Journal of Geology, 94(5): 635-650.
[39] Roser B P,Korsch R J. 1988. Provenance signatures of sandstone-mudstone suites determined using discriminant function analysis of major-element data. Chemical Geology,67(1/2): 119-139.
[40] Sun S S,Mc Lennan W F. 1989. Chemical and isotopic systematics of oceanic basalts: Implications for mantle composition and processes. Geological Society London Special Publications, 42(1): 313-345.
[41] Taylor S R,Mclennan S M. 1985. The Continental Crust: Its Composition and Evolution: An Examination of the Geochemical Record Preserved in Sedimentary Rocks. Oxford: Blackwell Scientific Publications.
[42] Xia B,Zhang L,Xia Y,Bader T. 2014. The tectonic evolution of the Tianshan Orogenic Belt: Evidence from U-Pb dating of detrital zircons from the Chinese southwestern Tianshan accretionary mélange. Gondwana Research, 25(4): 1627-1643.
[43] Xiao W J,Windley B F,Allen M B,Han C M. 2013. Paleozoic multiple accretionary and collisional tectonics of the Chinese Tianshan orogenic collage. Gondwana Research, 23(4): 1316-1341.