Age and origin of Mid-Pleistocene volcanic rocks from Qushi in Tengchong area, western Yunnan Province: SHRIMP zircon U-Pb dating and constraint from Hf-in-zircon isotopes
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摘要: 本文报道了腾冲曲石地区英安岩测年结果和该区火山岩样品的地球化学特征。英安岩(TC7)的SHRIMP锆石U-Pb年龄为0.41±0.01Ma(MSWD=1.18),属于中更新世,是迄今在国内测得的最年轻的高精度锆石U-Pb年龄。该区的火山岩具有高钾钙碱性的特点,为一套粗面玄武岩-玄武粗安岩-粗安岩-粗面岩以及玄武岩-安山岩-英安岩岩石组合。岩石富集LILE、LREE,相对亏损Nb、Ta、Ti等高场强元素,具有高的原始地幔标准化(Th/Nb)N比值(大于6)、低的Nb/La(小于1)和Nb/U比值(3~13),相对富集Zr,Zr/Y比值较高。这些地球化学特征明显区别于典型岛弧钙碱性火山岩。锆石Hf同位素分析结果显示εHf(t)值为-11.0~-1.5,变化较大;tDM1、tDM2分别为747~1115Ma、951~1437Ma,模式年龄远大于SHRIMP测定的锆石U-Pb年龄。腾冲火山岩喷发时该区属于大陆板内环境,该区火山岩与地壳混染的大陆玄武岩地球化学特征相类似,是幔源物质遭受壳源富集组分强烈混染的产物。Abstract: This paper reports U-Pb age and the geochemical characteristics of volcanic rocks from Qushi in Tengchong area. Mid-Pleistocene age (0.41±0.01Ma) of zircons in dacite (TC7) is yielded using SHRIMP in Beijing SHRIMP Center, which is the youngest high sensitive zircon U-Pb age in China by now. Whole rock analyses of major, trace elements for these rocks indicate they are high-K calc-alkaline series rocks including trachybasalt, basaltic trachyandesite, trachyandensite, trachyte and basalt, andesite, dacite. These rocks are enriched in LILE, LREE and low HFSE relatively, such as Nb, Ta, Ti. They have high Th/Nb values normalized by the primitive mantle and low Nb/La (εHf(t) values ranging from -11.0 to -1.5 and tDM2 modal age of 951~1437Ma, which is much larger than its real age. These geochemical features of the Tengchong volcanic rocks show an affinity with contaminated continental basaltic rocks. The volcanoes in Tengchong area erupted in an intraplate tectonic setting and their magma sources may have been strongly contaminated by large-scale crustal materials.
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Key words:
- Cenozoic volcanic rock /
- SHRIMP zircon U-Pb age /
- Hf isotope /
- Mid-Pleistocene /
- Magmatic origin /
- Qushi in Tengchong
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[1] Amelin Y, Lee DC, Halliday AN and Pidgeon RT. 1999. Nature of the Earth's earliest crust from hafnium isotopes in single detrital zircons. Nature, 399(6933):252-255
[2] Bacon CR, Persing HM, Wooden JL and Ireland TR. 2000. Late Pleistocene granodiorite beneath Crater Lake caldera, Oregon, dated by ion microprobe. Geology, 28(5):467-470
[3] Blichert-Toft J and Albarède F. 1997. The Lu-Hf isotope geochemistry of chondrites and the evolution of the mantle-crust system. Earth and Planetary Science Letters, 148(1-2):243-258
[4] Boynton WV. 1984. Geochemistry of the rare earth elements:Meteorite studies. In:Henderson P (ed.). Rare Earth Element Geochemistry. New York:Elsevier, 63-114
[5] Chen TF. 2003. The petrology of volcanic rocks in Tengchong, Yunnan. Sedimentary Geology and Tethyan Geology, 23(4):56-61 (in Chinese with English abstract)
[6] Chu NC, Taylor RN, Chavagnac V, Nesbitt RW, Boella RM, Milton JA, German GR, Bayon G and Burton K. 2002. Hf isotope ratio analysis using multi-collector inductively coupled plasma mass spectrometry:An evaluation of isobaric interference corrections. Journal of Analytical Atomic Spectrometry, 17(12):1567-1574
[7] Condie KC. 1993. Chemical composition and evolution of upper continental crust:Contrasting results from surface samples and shales. Chemical Geology, 104(1-4):1-37
[8] Cong BL, Chen QY, Zhang RY, Wu GY and Xu P. 1994. Magma origin of Cenozoic volcanic rocks in Tengchong, western Yunnan. Science in China (Series D), 24(4):441-448 (in Chinese)
[9] Dalrymple GB, Grove M, Lovera OM, Harrison TM, Hulen JB and Lanphere MA. 1999. Age and thermal history of the Geysers plutonic complex (felsite unit), Geysers geothermal field, California:A 40Ar/39Ar and U-Pb study. Earth and Planetary Science Letters, 173(3):285-298
[10] Ewart A, Collerson KD, Regelous M, Wendt JI and Niu Y. 1998a. Geochemical evolution within the Tonga-Kermadec-Lau arc-back-arc systems:The role of varying mantle wedge composition in space and time. Journal of Petrology, 39(3):331-368
[11] Ewart A, Milner SC, Armstrong RA and Dungan AR. 1998b. Etendeka volcanism of the Goboboseb Mountains and Messum igneous complex, Namibia. Part Ⅰ:Geochemical evidence of Early Cretaceous Tristan plume melts and the role of crustal contamination in the Parana-Etendeka CFB. Journal of Petrology, 39(2):191-225
[12] Ewart A, Marsh JS, Milner SC, Duncan AR, Kamber BS and Armstrong RA. 2004. Petrology and geochemistry of Early Cretaceous bimodal continental flood volcanism of the NW Etendeka, Namibia. Part 1:Introduction, mafic lavas and re-evaluation of mantle source components. Journal of Petrology, 45(1):59-105
[13] Guo B, Zhu LM, Li B, Gong HJ and Wang JQ. 2009. Zircon U-Pb age and Hf isotope composition of the Huashan and Heyu granite plutons at the southern margin of North China Craton:Implications for geodynamic setting. Acta Petrologica Sinica, 25(2):265-181 (in Chinese with English abstract)
[14] Hou KJ, Li YH, Zou TR, Qu XM, Shi YR and Xie GQ. 2007. Laser ablation-MC-ICP-MS technique for Hf isotope microanalysis of zircon and its geological applications. Acta Petrologica Sinica, 23(10):2595-2604 (in Chinese with English abstract)
[15] Huang FG and Zhou RQ. 1998. Some key problems on activity monitoring, prediction and countermeasure studies of Tengchong volcano. Journal of Seismological Research, 21(4):301-308 (in Chinese with English abstract)
[16] Ji JQ. 1998. The petrology and lithospheric tectonic evolution in Cenozoic in Tengchong-Yingjiang-Nabang areas, western Yunnan Province. Ph. D. Dissertation. Beijing:Institute of Geology, Chinese Academy of Sciences (in Chinese with English summary)
[17] Jiang CS. 1998a. Distribution characteristics of Tengchong volcano in the Cenozoic era. Journal of Seismological Research, 21(4):301-308 (in Chinese with English abstract)
[18] Jiang CS. 1998b. Period division of volcano activities in the Cenozoic era of Tengchong. Journal of Seismological Research, 21(4):320-329 (in Chinese with English abstract)
[19] Kieffer B, Arndt N, Lapierre H, Bastien F, Bosch D, Pecher A, Yirgu G, Ayalew D, Weis D, Jerram DA, Keller F and Meugniot C. 2004. Flood and shield basalts from Ethiopia:Magmas from the African Superswell. Journal of Petrology, 45(4):793-834
[20] Li DM, Li Q and Chen WJ. 1999. Excess Argon in plagioclase phenocryst of Tengchong volcanics and the related volcano erupting stages. Geological Review, 45(7):892-894 (in Chinese with English abstract)
[21] Li DM, Li Q and Chen WJ. 2000. Volcanic activities in the Tengchong volcano area since Pliocene. Acta Petrologica Sinica, 16(3):362-370 (in Chinese with English abstract)
[22] Li X and Liu JQ. 2012. A study on the geochemical characteristics and petrogenesis of Holocene volcanic rocks in the Tengchong volcanic eruption field, Yunnan Province, SW China. Acta Petrologica Sinica, 28(5):1507-1516 (in Chinese with English abstract)
[23] Mu ZG, Tong W and Curtis GH. 1987. Times of volcanic activity and origin of magma in Tengchong geothermal area, West Yunnan Province. Chinese Journal Geophysics, 30(3):261-270 (in Chinese with English abstract)
[24] Nowell GM, Kempton PD, Noble SR, Fitton JG, Saunders AD, Mahoney JJ and Taylor RN. 1998. High precision Hf isotope measurements of MORB and OIB by thermal ionisation mass spectrometry:Insights into the depleted mantle. Chemical Geology, 149(3-4):211-233
[25] Powell CM and Johnson BD. 1980. Contraints on the Cenozoic position of Sundaland. Tectonophysics, 63(1-4):91-109
[26] Rudnick RL and Fountain DM. 1995. Nature and composition of the continental crust:A lower crustal perspective. Reviews of Geophysics, 33(3):267-309
[27] Shangguan DS. 2012. The review of chronology of Tengchong volcanic rock. Geology of Yunnan, 31(3):391-394 (in Chinese)
[28] Shi YR, Wu ZH, Fan TY, Tong YB and Yang ZY. 2012. SHRIMP zircon U-Pb dating and geochemical analysis of the Pliocene volcanic rocks from Longchuanjiang valley, Tengchong area, western Yunnan Province. Geological Bulletin of China, 32(2-3):241-249 (in Chinese with English abstract)
[29] S derlund U, Patchett PJ, Vervoort JD and Isachsen CE. 2004. The 176Lu decay constant determined by Lu-Hf and U-Pb isotope systematics of Precambrian mafic intrusions. Earth and Planetary Science Letters, 219(3-4):311-324
[30] Song B, Zhang YH, Wan YS and Jian P. 2002. Mount making and procedure of the SHRIMP dating. Geological Review, 48(Suppl.):26-30 (in Chinese with English abstract)
[31] Sun SS and McDonough WF. 1989. Chemical and isotopic systematics of oceanic basalts:Implications for mantle composition and processes. In:Saunders AD and Norry MJ (eds.). Magmatism in the Ocean Basins. Geological Society, London, Special Publications, 42(1):313-345
[32] Taylor SR and McLennan SM. 1985. The Continental Crust:Its Composition and Evolution. Boston:Blackwell Scientific
[33] Thompson RN, Morrison MA, Hendry GL, Parry SJ, Simpson PR, Hutchison R and O'Hara MJ. 1984. An assessment of the relative roles of a crust and mantle in magma genesis:An elemental approach. Philosophical Transactions of the Royal Society of London, 310(1514):549-590
[34] Turner S, Foden J, George R, Evans P, Varne R, Elburg M and Jenner G. 2003. Rates and processes of potassic magma evolution beneath Sangeang Apivolcano, East Sunda arc, Indonesia. Journal of Petrology, 44(3):491-515
[35] Vervoort JD and Patchett PJ. 1996. Behavior of hafnium and neodymium isotopes in the crust:Constraints from Precambrian crustally derived granites. Geochimica et Cosmochimica Acta, 60(19):3717-3733
[36] Wan YS, Ho KS, Liu DY, Zhou HY, Dong CY and Ma MZ. 2012. Micro-scale heterogeneity of andesite from Chilungshan, northern Taiwan:Evidence from melt inclusions, geochronology and Hf-O isotopes of zircons. Chemical Geology, 328:244-258
[37] Wang F, Chen WJ, Peng ZC, Zhang ZL and Hu YT. 1999. Chronology of young volcanic rocks of Changbaishan Tianchi and Tengchong, China, by using the uranium-series TIMS method. Geological Review, 45(S1):94-925 (in Chinese with English abstract)
[38] Wang XL, Jiang SY and Dai BZ. 2010. Melting of enriched Archean subcontinental lithospheric mantle:Evidence from the ca.1760Ma volcanic rocks of the Xiong'er Group, southern margin of the North China Craton. Precambrian Research, 182(3):204-216
[39] Wang Y, Zhang XM, Jiang CS, Wei HQ and Wan JL. 2007. Tectonic controls on the Late Miocene-Holocene volcanic eruptions of the Tengchong volcanic field along the southeastern margin of the Tibetan Plateau. Journal of Asian Earth Sciences, 30(2):375-389
[40] Williams IS. 1998. U-Th-Pb Geochronology by Ion Microprobe. In:McKibben MA, Shanks III WC and Ridley WL (eds.). Applications of Microanalytical Techniques to Understanding Mineralizing Processes. Reviews in Economic Geology, 1-35
[41] Wilson M. 1989. Igneous Petrogenesis. London:Unwin Hyman, 1-464
[42] Wu FY, Li XH, Zheng YF and Gao S. 2007. Lu-Hf isotopic systematics and their applications in petrology. Acta Petrologica Sinica, 23(2):185-220 (in Chinese with English abstract)
[43] Wu XP. 2013. India joined with Asia 10 million years later than previously thought. Recent Developments in World Seismology, (4):4-5 (in Chinese)
[44] Xia LQ, Xia ZC, Xu XY, Li XM and Ma ZP. 2007. The discrimination between continental basalt and island arc basalt based on geochemical method. Acta Petrologica et Mineralogica, 26(1):77-89 (in Chinese with English abstract)
[45] Xu CL, Zhao GT, He YY and Li DP. 2012. Geochemistry of Cenozoic volcanic rocks from Tengchong, western Yunnan. Marine Geology and Quaternary Geology, 32(2):65-75 (in Chinese with English abstract)
[46] Zhang HH, Xu YG, Ge WC and Ma JL. 2006. Geochemistry of Late Mesozoic-Cenozoic basalts in Yitong-Datun area, Jilin Province and its implication. Acta Petrologica Sinica, 22(6):1579-1596 (in Chinese with English abstract)
[47] Zhao CH and Chen TF. 1992. A discussion on magma-tectonic type of Cenozoic volcanism from Tengchong area (Yunnan Province):A new type of post-collision arc-volcanism. Geoscience, 6(2):119-129 (in Chinese with English abstract)
[48] Zhao YW and Fan QC. 2010. Magma origin and evolution of Maanshan volcano, Dayingshan volcano and Heikongshan volcano in Tengchong area. Acta Petrologica Sinica, 26(4):1130-1140 (in Chinese with English abstract)
[49] Zhou ZH, Xiang YC and Jiang CS. 2000. Geochemistry of the rare earth and trace elements in the volcanic rocks in Tengchong, China. Journal of Seismological Research, 23(2):215-230 (in Chinese with English abstract)
[50] Zhu BQ and Mao CX. 1983. Nd-Sr isotope and trace element study on Tengchong volcanic rocks from Indo-Eurasian collisional margin. Geochimica, 1(1):1-14 (in Chinese with English abstract)
[51] 陈廷方. 2003. 云南腾冲火山岩岩石学特征. 沉积与特提斯地质, 23(4):56-61
[52] 从柏林, 陈秋媛, 张儒瑗, 吴根耀, 徐平. 1994. 中国滇西腾冲新生代火山岩的成因. 中国科学(D辑), 24(4):441-448
[53] 郭波, 朱赖民, 李犇, 弓虎军, 王建其. 2009. 华北陆块南缘华山和合峪花岗岩岩体锆石U-Pb年龄、Hf同位素组成与成岩动力学背景. 岩石学报, 25(2):265-281
[54] 侯可军, 李延河, 邹天人, 曲晓明, 石玉若, 谢桂青. 2007. LA-MC-ICP-MS锆石Hf同位素的分析方法及地质应用. 岩石学报, 23(10):2595-2604
[55] 皇甫岗, 周瑞琦. 1998. 腾冲火山活动监测、预测与对策研究中的若干重要问题. 地震研究, 21(4):301-308
[56] 季建清. 1998. 滇西南腾冲-盈江-那邦地区岩石学与新生代岩石圈构造演化. 博士学位论文.北京:中国科学院地质研究所
[57] 姜朝松. 1998a. 腾冲新生代火山分布特征. 地震研究, 21(4):309-319
[58] 姜朝松. 1998b. 腾冲地区新生代火山活动分期. 地震研究, 21(4):320-329
[59] 李大明, 李齐, 陈文寄. 1999. 腾冲火山岩斜长石斑晶的过剩氩兼论火山活动的分期. 地质论评, 45(7):892-894
[60] 李大明, 李齐, 陈文寄. 2000. 腾冲火山区上新世以来的火山活动. 岩石学报, 16(3):362-370
[61] 李欣, 刘嘉麒. 2012. 云南腾冲全新世火山岩地球化学特征及其成因. 岩石学报, 28(5):1507-1516
[62] 穆治国, 佟伟, Curtis GH. 1987. 腾冲火山活动的时代和岩浆来源问题. 地球物理学报, 30(3):261-270
[63] 上官德树. 2012. 腾冲火山岩年龄问题评述. 云南地质, 31(3):391-394
[64] 石玉若, 吴中海, 范桃园, 仝亚博, 杨振宇. 2012. 滇西腾冲地区龙川江河谷上新世火山岩SHRIMP锆石U-Pb年龄及其地球化学特征. 地质通报, 31(2-3):241-249
[65] 宋彪, 张玉海, 万渝生, 简平. 2002. 锆石SHRIMP样品靶制作、年龄测定及有关现象讨论. 地质论评, 48(增刊):26-30
[66] 王非, 陈文寄, 彭子成, 张仲禄, 胡玉台. 1999. 腾冲、长白山年轻火山岩铀系不平衡热电离质谱法年代学研究. 地质论评, 45(增刊):94-925
[67] 吴福元, 李献华, 郑永飞, 高山. 2007. Lu-Hf同位素体系及其岩石学应用. 岩石学报, 23(2):185-220
[68] 吴秀平. 2013. 印度板块与欧亚板块碰撞时间比原认识晚1000万年. 国际地震动态, (4):4-5
[69] 夏林圻, 夏祖春, 徐学义, 李向民, 马中平. 2007. 利用地球化学方法判别大陆玄武岩和岛弧玄武岩. 岩石矿物学杂志, 26(1):77-89
[70] 徐翠玲, 赵广涛, 何雨旸, 李德平. 2012. 滇西腾冲新生代火山岩岩石地球化学特征. 海洋地质与第四纪地质, 32(2):65-75
[71] 张辉煌, 徐义刚, 葛文春, 马金龙. 2006. 吉林伊通-大屯地区晚中生代-新生代玄武岩的地球化学特征及其意义. 岩石学报, 22(6):1579-1596
[72] 赵崇贺, 陈廷方. 1992. 腾冲新生代火山作用构造-岩浆类型的探讨——一种滞后型的弧火山. 现代地质, 6(2):119-129
[73] 赵勇伟, 樊祺诚. 2010. 腾冲马鞍山、打鹰山、黑空山火山岩浆来源与演化. 岩石学报, 26(4):1130-1140
[74] 周真恒, 向才英, 姜朝松. 2000. 腾冲火山岩稀土和微量元素地球化学研究. 地震研究, 23(2):215-230
[75] 朱炳泉, 毛存孝. 1983. 印度与欧亚板块东部碰撞边界——腾冲火山岩的Nd-Sr同位素与微量元素研究. 地球化学, 1(1):1-14
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