| Citation: |
ZHU Min, CHEN Hanlin, MENG Lifeng. 2025. Zircon U-Pb geochronology of the Middle–Late Triassic sandstones in Yanyuan Basin, southwest Yangtze and its tectonic implications. Sedimentary Geology and Tethyan Geology, 45(2): 249-267. doi: 10.19826/j.cnki.1009-3850.2024.11006
|
Zircon U-Pb geochronology of the Middle–Late Triassic sandstones in Yanyuan Basin, southwest Yangtze and its tectonic implications
-
Abstract
During the Triassic period, the Yanyuan Basin served as a window for studying geological events such as the closure of the Paleo-Tethys Ocean on the western margin of the Yangtze Plate. It experienced a transition from passive continental margin to foreland basin sedimentation. Through field data collection of three profiles in the Yantang area, sandstone petrography, paleoflow analysis, and detrital zircon U-Pb geochronology analysis, combined with previously reported data, the lithofacies and paleogeographic characteristics of the Middle–Late Triassic sandstone and detrital zircon age spectrum in the Yanyuan Basin show differences, revealing different provenance systems: during the Middle Triassic Ladinian to Late Triassic Carnian, the sedimentation in the Yanyuan Basin was mainly influenced by the overall uplift of the western Yangtze Plate, indicating an internal provenance from the Yangtze Plate; while during the Late Triassic Norian, the basin began to receive material from the western Qiangtang multi-arc basin system, reflecting the influence of the western Sanjiang orogenic belt on the formation of the Yanyuan Basin, and marking the commencement of the comprehensive basin-mountain transformation process in the western Yangtze region.
-
-
References
[1] Bruguier O,Lancelot J R,Malavieille J,1997. U-Pb dating on single detrital zircon grains from the Triassic Songpan–Ganze flysch (Central China):Provenance and tectonic correlations[J]. Earth and Planetary Science Letters,152:217 − 231. doi: 10.1016/S0012-821X(97)00138-6 [2] Burchfiel B C,Chen Z,2012. Tectonics of the southeastern Xizang Plateau and its adjacent foreland[J]. Geological Society of America Memoir,210:231. [3] 四川省地质矿产局, 1991. 四川省1: 20万区域地质图（盐源幅）[M]. 北京: 地质出版社. BGMRSP (Bureau of Geology and Mineral Resources of Sichuan Province). 1991. Regional geological map of Sichuan province[M]. Beijing:Geological Publishing House. [4] Burrett C,Zaw K,Meffre S,et al.,2014. The configuration of Greater Gondwana-Evidence from LAICPMS,U–Pb geochronology of detrital zircons from the Palaeozoic and Mesozoic of Southeast Asia and China[J]. Gondwana Research,26:31 − 51. [5] Cawood P A,Nemchin A A,Strachan R Prave,et al.,2007. Sedimentary basin and detrital zircon record along East Laurentia and Baltica during assembly and break up of Rodinia[J]. J. Geol. Soc.,164:257 − 275. doi: 10.1016/j.gr.2013.05.020 [6] Chen H L,Zhu M,Chen S Q,et al.,2020. Basin-orogen patterns and the Late Triassic foreland basin conversion process in the western Yangtze Block,China[J]. Journal of Asian Earth Sciences,194(104311):1 − 10. doi: 10.1144/0016-76492006-115 [7] Chen Q,Sun M,Long X P,et al.,2016. U–Pb ages and Hf isotopic record of zircons from the late Neoproterozoic and Silurian–Devonian sedimentary rocks of the western Yangtze Block:Implications for its tectonic evolution and continental affinity[J]. Gondwana Research,31:184 − 199. [8] Chen Q,Sun M,Long X P,et al.,2018. Provenance study for the Paleozoic sedimentary rocks from the west Yangtze Block:Constraint on possible link of South China to the Gondwana supercontinent reconstruction[J]. Precambrian Research,309:271 − 289. doi: 10.1016/j.gr.2015.01.009 [9] 陈岳龙,罗照华,赵俊香,等,2004. 从锆石SHRIMP 年龄及岩石地球化学特征论四川冕宁康定杂岩的成因[J]. 中国科学:D辑,8:687 − 697. doi: 10.1016/j.precamres.2017.01.022 Chen Y L,Luo Z H,Zhao J X,et al.,2004. From the perspective of zirconium SHRIMP ages and petrographic geochemical characteristics,exploring the genesis of the Kanding complex in Sichuan's Mingniu[J]. Scientia Sinica (Terrae),8:687 − 697 (in Chinese with English abstract). doi: 10.1016/j.precamres.2017.01.022 [10] 陈岳龙, 罗照华, 赵俊香, 等, 2004. 从锆石SHRIMP 年龄及岩石地球化学特征论四川冕宁康定杂岩的成因[J]. 中国科学: D辑, 8: 687 − 697. Compston W,Zhang Z C,Cooper J A,et al.,2008. Further SHRIMP geochronology on the Early Cambrian of South China[J]. American Journal of Science,308:399 − 420. [11] Cui K X,2004. Regional palaeogrography and its evolution atlas of southwestern China[M]. Beijing:Seismological Press:25 − 130. doi: 10.2475/04.2008.01 [12] 崔凯,2019. 鄂尔多斯盆地西南部上古生界山1、盒8 段古水流分析[J]. 地下水,41(1):142 − 145. Cui K,2019. Analysis of ancient watercourses in the southwestern part of the Ordos Basin,Shan 1 and He 8 formations[J]. Ground Water,41(1):142 − 145 (in Chinese with English abstract). [13] Currie B S,1997. Sequence stratigraphy of nonmarine Jurassic-Cretaceous rocks,central Cordilleran foreland-basin system[J]. Geol. Soc. Am. Bull.,109:1206 − 1222. [14] 邓军,葛良胜,杨立强,2013. 构造动力体制与复合造山作用−兼论三江复合造山带时空演化[J]. 岩石学报,29(4):1099 − 1114. doi: 10.3969/j.issn.1004-1184.2019.01.050 Deng J,Ge L S,Yang L Q,2013. Tectonic dynamic system and compound orogeny:Additionally discussing the temporal spatial evolution of Sanjiang orogeny,Southwest China[J]. Acta Petrologica Sinica,29(4) :1099 − 1114 (in Chinese with English abstract). doi: 10.3969/j.issn.1004-1184.2019.01.050 [15] Dong Y P,Zhang G W,Neubauer F,et al.,2011a. Tectonic evolution of the Qinling orogen,China:Review and synthesis[J]. Journal of Asian Earth Sciences,41:213 − 237. doi: 10.1130/0016-7606(1997)109<1206:SSONJC>2.3.CO;2 [16] 邓军, 葛良胜, 杨立强, 2013. 构造动力体制与复合造山作用−兼论三江复合造山带时空演化[J]. 岩石学报, 29（4）: 1099 − 1114. Du L L,Geng Y S,Yang C H,et al.,2005. Geochemistry and SHRIMP U-Pb zircon chronology of basalts from the Yanbian Group in the Western Yangtze Block[J]. Acta Geologica Sinica,79:805 − 813 (in Chinese with English abstract). [17] 杜利林,耿元生,杨崇辉,等,2007. 扬子地台西缘康定群的再认识:来自地球化学和年代学证据[J]. 地质学报,81(11):1562 − 1577. doi: 10.1016/j.jseaes.2011.03.002 Du L L,Geng Y S,Yang C H,et al.,2007. New understanding on Kangding Group on western margin of Yangtze Block:Evidence from Geochemistry and Chronology[J]. Acta Geologica Sinica,81(11):1562 − 1577 (in Chinese with English abstract). doi: 10.1016/j.jseaes.2011.03.002 [18] Duan L,Meng Q R,Wu G L,et al.,2012. Detrital zircon evidence for the linkage of the South China block with Gondwanaland in early Palaeozoic time[J]. Geological Magazine,149(6):1124 − 1131. [19] 杜利林, 耿元生, 杨崇辉, 等, 2007. 扬子地台西缘康定群的再认识: 来自地球化学和年代学证据[J]. 地质学报, 81（11）: 1562 − 1577. doi: 10.3321/j.issn:0001-5717.2007.11.011 Duan L,Meng Q R,Zhang C L,et al.,2011. Tracing the position of the South China block in Gondwana:U–Pb ages and Hf isotopes of Devonian detrital zircons[J]. Gondwana Research,19:141 − 149. doi: 10.3321/j.issn:0001-5717.2007.11.011 [20] Farrell K M,2001. Geomorphology,facies architecture,and high-resolution,nonmarine sequence stratigraphy in avulsion deposits,Cumberland Marshes,Saskatchewan[J]. Sed. Geol.,139:93 − 150. doi: 10.1017/S0016756812000404 [21] Greentree M R,Li Z X,Li X H,et al.,2006. Late Meso Proterozoic to earliest NeoProterozoic basin record of the Sibao orogenesis in western South China and relationship to the assembly of Rodinia[J]. Precambrian Research,151:79 − 100. doi: 10.1016/j.gr.2010.05.005 [22] Heller P L,Angevine C L,Winslow N S,1988. Two-phase stratigraphic model of foreland-basin sequences[J]. Geology,16:501 − 504. doi: 10.1016/S0037-0738(00)00150-0 [23] Lai C K,Meffre S,Crawford A J,et al.,2014. The Western Ailaoshan Volcanic belts and their SE Asia connection:A new tectonic model for the Eastern Indochina block[J]. Gondwana Research,26:52 − 74. doi: 10.1016/j.precamres.2006.08.002 [24] Lan Z W,Li X H,Chu X L,et al.,2017. SIMS U-Pb zircon ages and Ni-Mo-PGE geochemistry of the lower Cambrian Niutitang Formation in South China:Constraints on Ni-Mo-PGE mineralization and stratigraphic correlations[J]. Journal of Asian Earth Sciences,137:141 − 162. [25] Lei Y L,Li B L,Chen Z X,2010. Tectonic Evolution on the western border area of Upper Yangtze plate[M]. Beijing:Geology Press. doi: 10.1016/j.gr.2013.03.003 [26] Leng C B,Huang Q Y,Zhang X C,et al.,2014. Petrogenesis of the Late Triassic volcanic rocks in the Southern Yidun arc,SW China:Constraints from the geochronology,geochemistry,and Sr–Nd–Pb–Hf isotopes[J]. Lithos,190 − 191:363 − 382. doi: 10.1016/j.jseaes.2016.12.046 [27] 雷永良, 李本亮, 陈竹新, 等, 2010. 上扬子板块西部边界地区构造演化[M]. 北京: 地质出版社. Li Z X,Li X H,Kinny P D,et al.,2003. Geoehronology of NeoProterozoic syn-rift magmatism in the Yangtze Craton,South China and correlations with other continents:Evidence for a mantle superplume that broke up Rodinia[J]. Precambrian Research,122:85 − 109. [28] Lin J,Liu Y S,Yang Y H,et al.,2016. Calibration and correction of LA-MC-ICP-MS analysis for element contents and isotopic ratios[J]. Solid Earth Science,1(1):5 − 27. [29] 刘家铎,刘文周,1995. 盐源盆地演化及早三叠世青天堡组沉积环境[J]. 成都理工学院学报(3). doi: 10.1016/j.lithos.2013.12.018 Liu J D,Liu W Z,1995. The evolution of Yanyuan basin and the sedimentary environment of the Early Triassic Qingtianbao group[J]. Journal of Chengdu institute of Technology(3) (in Chinese with English abstract). doi: 10.1016/j.lithos.2013.12.018 [30] Liu S F,Steel R,Zhang G W,2005. Mesozoic sedimentary basin development and tectonic implication,northern Yangtze Block,eastern China:Record of continent-continent collision[J]. Journal of Asian Earth Sciences,25:9 − 27. doi: 10.1016/S0301-9268(02)00208-5 [31] Luo L,Qi J F,Zhang M Z,et al.,2013. Detrital zircon U-Pb ages of Late-Jurassic deposits in the western and northern Sichuan Basin margin:Constraints on the foreland basin provenance and tectonic implications[J]. International Journal of Earth Sciences,103:553 − 1568. doi: 10.1016/j.sesci.2016.04.002 [32] 刘家铎, 刘文周, 1995. 盐源盆地演化及早三叠世青天堡组沉积环境[J]. 成都理工学院学报（3）. Ma Y S,et al.,2009. Sequence Stratigraphy and Palaeo Geography of South China[M]. Beijing:Science Press:116 − 152. [33] Meng L F,Chen W,Shen T,et al.,2022. A Study on the provenance of Early to Late Triassic clastic rocks from the northwestern Sichuan Basin,southwestern China:Constraints on the Early Mesozoic tectonic evolution of the western Yangtze Block [J]. Frontiers in Earth Science,10:940301. doi: 10.1016/j.jseaes.2004.01.010 [34] Metcalfe I,2013. Gondwana dispersion and Asian accretion:Tectonic and palaeogeographic evolution of eastern Tethys[J]. J. Asian Earth Sci.,66:1 − 33. [35] 马永生, 等, 2009. 中国南方构造: 层序岩相古地理图集[M]. 北京: 科学出版社: 116 − 152. Munteanu M,Yao Y,Wilson A H,et al.,2013. Panxi region (Southwest China): Tectonics,magmatism and metallogenesis:A review[J]. Tectonophysics,608:51 − 72. [36] 聂小松,2015. 哀牢山构造带及邻区古生代碎屑沉积物源示踪及其大地构造意义[D]. 中国科学院广州地球化学研究所:1 − 78. Nie X S,2015. Provenance analysis on the Paleozoic detrital sediments in the Ailaoshan tectonic zone and its adjacent region[D]. Guangzhou:Guangzhou Institute of Geochemistry,Chinese Academy of Sciences:1 − 78 (in Chinese with English abstract). [37] 潘桂棠,王立全,李兴振,等,2001. 青藏高原区域构造格局及其多岛弧盆系的空间配置[J]. 沉积与特提斯地质,21(3):1 − 26. Pan G T,Wang L Q,Li Z X,2001. The tectonic framework and spatial allocation of the archipelagic arc-basin systems on the Qinghai-Xizang Plateau[J]. Sedimentary Geology and Tethyan Geology,21 (3):1 − 26 (in Chinese with English abstract). [38] Plint A G,McCarthy,P J Faccini,et al.,2001. Nonmarine sequence stratigraphy:Updip expression of sequence boundaries and systems tracts in a high resolution framework,Cenomanian Dunvegan Formation,Alberta foreland basin,Canada[J]. Am. Assoc. Pet. Geol. Bull.,85:1967 − 2001. doi: 10.1016/j.jseaes.2012.12.020 [39] Posamentier H W,Allen G P,1993. Siliciclastic sequence stratigraphic patterns inforeland ramp-type basin [J]. Geology,21:455 − 458. doi: 10.1016/j.tecto.2013.09.008 [40] 聂小松, 2015. 哀牢山构造带及邻区古生代碎屑沉积物源示踪及其大地构造意义[D]. 中国科学院广州地球化学研究所: 1 − 78. Pullen A,Kapp P,Gehrels G E,et al.,2011. Metamorphic rocks in central Xizang:Lateral variations and implications for crustal structure[J]. Geological Society of America Bulletin,123(3 − 4):585 − 600. [41] 潘桂棠, 王立全, 李兴振, 等, 2001. 青藏高原区域构造格局及其多岛弧盆系的空间配置[J]. 沉积与特提斯地质, 21（3）: 1 − 26. She Z B,2007. Delrital zircon geochronology of the upper Proterozoic-Mesozoic clastic rocks in the Mid-Upper Yangtze Region[D]. Wuhan:China University of Geosciences:1 − 129. [42] Shellnutt J G,Zhou M F,Yan D P,et al.,2008. Longevity of the Permian Emeishan mantle plume (SW China):1Ma,8Ma or 18Ma?[J]. Geological Magazine,145:373 − 388. [43] Sichuan Institute of Geological and Mineral Resources,1987. Triassic stratigraphy and sedimentary facies of Yanyuan-Lijiang region[M]. Beijing:Geological Publishing House:1 − 51. [44] Sun W H,Zhou M F,Gao J F,et al.,2009. Detrital zircon U-Pb geochronological and Lu-Hf isotopic constraints on the Precambrian magmatic and crustal evolution of the western Yangtze Block,SW China[J]. Precambrian Research,172(1 − 2):99 − 126. doi: 10.1130/B30154.1 [45] Usuki T,Lan C Y,Wang K L,et al.,2013. Linking the Indochina block and Gondwana during the Early Paleozoic:Evidence from U–Pb ages and Hf isotopes of detrital zircons[J]. Tectonophysics,588:145 − 159. [46] Van Wagoner J C,1995. Sequence stratigraphy and marine to nonmarine facies architecture of foreland basin strata,Book Cliffs,Utah,USA. In:Van Wagoner,J C,Bertram G T(eds.).Sequence stratigraphy of foreland basin deposits:Outcrop and subsurface examples from the Cretaceous of North America [J]. American Association Petroleum Geologists Memoir,64:138 − 223. doi: 10.1017/S0016756808004524 [47] 四川省地质矿产研究所, 1987. 盐源−丽江地区三叠纪地层及沉积相[M]. 北京: 地质出版社: 1 − 51. Vermeesch P,2013. Multi-sample comparison of detrital age distributions[J]. Chemical Geology,341:140 − 146. [48] Vermeesch P,Resentini A,Garzanti E,2016. An R package for statistical provenance analysis[J]. Sedimentary Geology,336:14 − 25. [49] Wang B D,Li Q W,Chen J L,et al.,2014. Triassic three-stage collision in the Paleo-Tethys:constraints from magmatism in the Jiangda–Deqen–Weixi continental margin arc,SW China[J]. Gondwana Research,26(2):475 − 491. [50] Wang B Q,Wang W,Chen W T,et al.,2013. Constraints of detrital zircon U-Pb ages and Hf isotopes on the provenance of the Triassic Yidun Group and tectonic evolution of the Yidun Terrane,eastern Xizang[J]. Sedimentary Geology,289:74 − 98. [51] Weislogel A L,Graham S A,Chang E Z,et al.,2006. Detrital zircon provenance of the Late Triassic Songpan-Ganzi complex:Sedimentary record of collision of the North and South China blocks[J]. Geology,34(2):97 − 100. [52] Weislogel A L,Graham S A,Chang E Z,2010. Detrital zircon provenance from three turbidite depocenters of the Middle-Upper Triassic Songpan-Ganzi complex,central China:Record of collisional tectonics,erosional exhumation,and sediment production[J]. Geological Society of America Bulletin,122:2041 − 2062. doi: 10.1016/j.chemgeo.2013.01.010 [53] Xin D,Yang T N,Liang M J,et al.,2018. Syn-subduction crustal shortening produced a magmatic flare-up in middle Sanjiang orogenic belt,southeastern Xizang Plateau:Evidence from geochronology,geochemistry,and structural geology[J]. Gondwana Research,62:93 − 111. doi: 10.1016/j.sedgeo.2016.01.009 [54] Xu Y G,Chung S L,Jahn B M,et al.,2001. Petrologic and geochemical constraints on the petrogenesis of Permian–Triassic Emeishan flood basalts in south western China[J]. Lithos,58:145 − 168. doi: 10.1016/j.gr.2013.07.023 [55] 闫国川,2018. 江达−维西陆缘弧中北段火山岩地球化学特征及构造演化研究[D]. 中国地质大学(北京). doi: 10.1016/j.sedgeo.2013.02.005 Yan G C,2018. Geochemical characteristics and tectonic evolution study of volcanic rocks in the northern section of Jomda-Weixi continental margin arc[D]. China University of Geosciences(Beijing) (in Chinese with English abstract). doi: 10.1016/j.sedgeo.2013.02.005 [56] Yang C,Li X H,Zhu M Y,2022. Tectonic regime transition of the western South China Block in early Cambrian:Evidence from the Meishucun volcanic ash beds[J]. Palaeo-world,31:591 − 599. [57] Ye M F,Li X H,Li W X,et al.,2007. SHRIMP zircon U-Pb geochronological and whole-rock geochemical evidence for an early NeoProterozoic Sibaoan magmatic arc along the southeastern margin of the Yangtze Block[J]. Gondwana Researeh,12(1 − 2):144 − 156. doi: 10.1130/B26606.1 [58] Zhang Y,Jia D,Li S,et al.,2015. Provenance of detrital zircons in the Late Triassic Sichuan foreland basin:Constraints on the evolution of the Qinling Orogen and Longmen Shan thrust-fold belt in central China[J]. Int. Geol. Rev.,57:1806 − 1824. doi: 10.1016/j.gr.2018.03.009 [59] Zhao X X,Coe R,1987. Palaeomagnetic constraints on the collision and rotation of North and South China[J]. Nature,327:141 − 144. doi: 10.1016/S0024-4937(01)00055-X [60] 闫国川, 2018. 江达−维西陆缘弧中北段火山岩地球化学特征及构造演化研究[D]. 中国地质大学（北京）. Zhou M F,Yan D P,Wang C L,et al.,2006a. Subduction-related origin of the 750Ma Xuelongbao adakitic complex (Sichuan Province,China):Implications for the tectonic setting of the giant Neoproterozoic magmatic event in South China[J]. Earth and Planetary Science Letters,248:286 − 300. [61] 周明忠,罗泰义,李正祥,等,2008. 遵义牛蹄塘组底部凝灰岩锆石SHRIMP U-Pb年龄及地质意义[J]. 科学通报,53(1):104 − 109. doi: 10.1016/j.palwor.2022.03.003 Zhou M Z,Luo T Y,Li Z X,et al.,2008. Zircon SHRIMP U-Pb age and geological significance of the bottom of the Niutitang Formation in Zunyi[J]. Chinese Science Bulletin,53(1):104 − 109 (in Chinese with English abstract). doi: 10.1016/j.palwor.2022.03.003 [62] Zhou M F,Ma Y,Yan D P,et al.,2006b. The Yanbian Terrane (southern Sichuan Province,SW China):A Neoproterozoic arc assemblage in the western margin of the Yangtze Block[J]. Precambrian Research,144(1 − 2):19 − 38. doi: 10.1016/j.gr.2006.09.001 [63] Zhu M,Chen H L,Zhou J,et al.,2017. Provenance change from the Middle to Late Triassic of the southwestern Sichuan basin,Southwest China:Constraints from the sedimentary record and its tectonic significance [J]. Tectonophysics,700 – 701:92 − 107. doi: 10.1080/00206814.2015.1027967 [64] 朱民,陈汉林,周静,等,2016. 上扬子西南盐源盆地早三叠世物源体系及构造意义[J]. 地球科学,41(8):1309 − 1321. doi: 10.1038/327141a0 Zhu M,Chen H L,Zhou J,et al.,2016. Provenance of Early Triassic in Yanyuan Basin,Upper Yangtze and its implication for the tectonic evolution[J]. Journal of Earth Science,41(8):1309 − 1321 (in Chinese with English abstract). doi: 10.1038/327141a0 [65] 资金平,贾东,魏国齐,等,2017. 四川乐山震旦系灯影组火山碎屑岩锆石LA-ICP-MS U-Pb 定年及盆地裂陷演化讨论[J]. 地质论评,63(4):1040 − 1049. doi: 10.1016/j.jpgl.2006.05.032 Zi J P,Jia D,Wei G Q,et al.,2017. LA-ICP-MS U-Pb zircon ages of volcaniclastic beds of the third member of the Sinian(Ediacaran) Dengying Formation in Leshan,Sichuan,and a discussion on the rift evolution in the basin[J]. Geological Review,63(4):1040 − 1049 (in Chinese with English abstract). doi: 10.1016/j.jpgl.2006.05.032 [66] 四川省地质矿产局,1991. 四川省1:20万区域地质图(盐源幅)[M]. 北京:地质出版社. doi: 10.3321/j.issn:0023-074X.2008.01.018 Zhou M Z, Luo T Y, Li Z X, et al., 2008. Zircon SHRIMP U-Pb age and geological significance of the bottom of the Niutitang Formation in Zunyi[J]. Chinese Science Bulletin, 53（1）: 104 − 109. doi: 10.3321/j.issn:0023-074X.2008.01.018 [67] 崔克信,2004. 中国西南区域古地理及其演化图集[M]. 北京:地震出版社. doi: 10.1016/j.precamres.2005.11.002 Zhou M F, Ma Y, Yan D P, et al., 2006b. The Yanbian Terrane （southern Sichuan Province, SW China）: A Neoproterozoic arc assemblage in the western margin of the Yangtze Block[J]. Precambrian Research, 144（1 − 2）: 19 − 38. doi: 10.1016/j.precamres.2005.11.002 [68] 雷永良,李本亮,陈竹新,等,2010. 上扬子板块西部边界地区构造演化[M]. 北京:地质出版社. Zhu M, Chen H L, Zhou J, et al., 2017. Provenance change from the Middle to Late Triassic of the southwestern Sichuan basin, Southwest China: Constraints from the sedimentary record and its tectonic significance [J]. Tectonophysics, 700 – 701: 92 − 107. [69] 马永生,等,2009. 中国南方构造:层序岩相古地理图集[M]. 北京:科学出版社:116 − 152. Zhu M, Chen H L, Zhou J, et al., 2016. Provenance of Early Triassic in Yanyuan Basin, Upper Yangtze and its implication for the tectonic evolution[J]. Journal of Earth Science, 41（8）: 1309 − 1321. [70] 四川省地质矿产研究所,1987. 盐源−丽江地区三叠纪地层及沉积相[M]. 北京:地质出版社:1 − 51. Zi J P, Jia D, Wei G Q, et al., 2017. LA-ICP-MS U-Pb zircon ages of volcaniclastic beds of the third member of the Sinian（Ediacaran） Dengying Formation in Leshan, Sichuan, and a discussion on the rift evolution in the basin[J]. Geological Review, 63（4）: 1040 − 1049. -
Access History
Figures(11)
Tables(1)
Export File
Citation
ZHU Min, CHEN Hanlin, MENG Lifeng. 2025. Zircon U-Pb geochronology of the Middle–Late Triassic sandstones in Yanyuan Basin, southwest Yangtze and its tectonic implications. Sedimentary Geology and Tethyan Geology, 45(2): 249-267. doi: 10.19826/j.cnki.1009-3850.2024.11006
Format
Content
DownLoad:
-
Figure 1.
Simplified tectonic sketch of the Yanyuan area （b） and adjacent regions （a）（modified from Bureau of Geology and Mineral Resources of Sichuan Province, 1991; I Metcalfe, 2013; Munteanu et al., 2013）
-
Figure 2.
Stratigraphic column and outcrop photograph of Middle–Late Triassic in Yantang area（refer to Fig.1a for the profile locations）
-
Figure 3.
Field photographs （a, b, c） and photomicrographs （d, e, f） for Middle–Late Trassic sandstone samples
-
Figure 4.
LA-ICP-MS zircon U-Pb representative cathodoluminescence （CL） from samples of Middle–Late Triassic at Yantang，Yanyuan area （a, b, c）
-
Figure 5.
U-Pb concordia （a, b, c） and histogram diagrams （d, e, f） of detrital zircons
-
Figure 6.
Cross-bedding in the Late Triassic fluvial deposits of the Yanyuan area
-
Figure 7.
Paleocurrent direction analysis of the Late Triassic sediments in Yanyuan area
-
Figure 8.
Probability density plots and histograms of detrital zircon U-Pb ages of sandstones in the Yanyuan area and adjacent regions
-
Figure 9.
MDS plots of the Middle–Upper Triassic detrital zircon age in the Yanyuan area and potential provenance areas
-
Figure 10.
Paleogeography of the Yanyuan Basin during Middle to Late Triassic （refer to Cui, 2004; Ma et al., 2009）
-
Figure 11.
Model for schematic paleogeographic evolution of southwestern Yangtze Craton during the Middle to Late Triassic