新疆西南天山超高压变质带的形成与演化
The formation and tectonic evolution of UHP metamorphic belt in southwestern Tianshan, Xinjiang
-
摘要: 本文系统地总结了近年来有关新疆西南天山超高压变质带在野外地质产状、岩石学、矿物学、地球化学和年代学等方面研究取得的进展。根据野外地质产状特征,西南天山出露的榴辉岩可以分为三类:即在蓝片岩中呈透镜体的块状榴辉岩、保存有玄武岩岩枕的枕状榴辉岩和夹杂在大理岩中的条带状榴辉岩。详细的岩石学研究表明它们都经历过超高压变质作用,其变质作用演化经历了3个阶段:峰期榴辉岩阶段(560～600℃,4.95～5.07GPa)、主期榴辉岩阶段(598～496℃,25.72～26.66±1kbar)和退变绿帘石蓝片岩相阶段。地球化学研究显示其原岩相当于源于富集地幔的(ε_(Nd)-1.4～-0.4)具有 OIB 特点的变碱性玄武岩、源于亏损地幔的(ε_(Nd)= 6.7～ 7.4)具有 NMORB 特点的洋中脊玄武岩和源于较富集地幔的(ε_(Nd)=-2.5～ 3.2)具有 EMORB 特点的洋中脊玄武岩,它们形成于海山环境下的洋壳。榴辉岩中锆石 SHRIMP定年结果表明榴辉岩的原岩形成于石炭纪(>310Ma)之前,洋壳开始俯冲发生在二叠纪末(280～290Ma),高压一超高压变质发生在三叠纪(220～230Ma)。结合在其北侧低压麻粒岩带的发现,提出了新疆西南天山超高压变质带双变质带构造演化模式。
-
-
[1] Ai YL, Zhang LF, Li XP and Qu JF. 2005. Geochemical characteristics of HP-UHP eclogites and blueschists, and tectonic implications in southwestern Tianshan, China. Progress of Nature Science ( in press)
[2] Anovitz L M and Essene E J. 1987. Phase equilibrium in the system CaCO3 - MgCO3 - FeCO3. Journal of Petrology, 28: 389 -414
[3] Arnaud N O, Kelley S. 1995. Evidence for excess Ar during high pressure metamorphismin the Dora2Maira (west Alps, Italy), using a Ultra-Violet Laser Ablation Microprobe 40Ar/ 39Ar technique.Contrib. Mineral. Petral. , 121(1): 1 -11
[4] Burton K, Kohn M, Cohen A and O\'Nions R. 1995. The relative diffusion of Pb, Nd, Sr and O in garnet. EPSL. 133, 199 -211.
[5] Carswell D A and Compagnoni R. 2003. Introduction with review of the definition, distribution and geotectonic significance of ultrahigh pressure metamorphism, In: Ultrahigh Pressure Metamorphism (Ed:Carswell & Compagnoni). Eotvos University Press, Budapest, 3 -9
[6] Coleman R G and Wang X. 1995. Overview of the geology and tectonics of UHPM. In: R. G. Coleman and X. Wang (eds.). Ultrahighpressure Metamorphism. Cambridge, 1 - 32
[7] Davies J H and yon Blanckenburg F. 1995. Slab breakoff, a model of lithospher detachment and its test in the magmatism and deformation of collisional orogens. Earth and Planetary Science Letters, 129:85- 102
[8] Dobretsov NL, Coleman RG, Liou JG and Maruyama S. 1987. Blueschist belt in Asia and possible periodicity of blueschist facies metamorphism. Ofioliti, 12: 445 -456
[9] Gao J and Klemd R. 2003. Formation of HP-LT rocks and their tectonic implications in the western Tianshan Orogen, NW China:geochemical and age constraints. Lithos, 66:1 - 22
[10] Gao J, Klemd R, Zhang L, Wang Z and Xiao X. 1999. PT path of highpressure metamorphic rocks and its tectonic implication in western Tianshan, northwest China. Journal of Metamorphic Geology, 17:621 - 636
[11] Gao J, Zhang LF, Liu W. 2000. The 40Ar/39Ar age record of formation and uplift of the blueschists and eclogi tes in the western Tianshan Mountains. Chinese Science Bulletin, 45 ( 11 ): 1047 - 1052
[12] Jahn B-M, Rumble D and Liou J G. 2003. Geochemistry and isotope tracer study of UHP metamorphic .rocks, In: Ultrahigh Pressure Metamorphism (Ed: Carswell & Compagnoni ). Eotvos University Press, Budapest, 365-414
[13] Kretz R. 1983. Symbols of rock-forming minerals. American Mineralogist, 68: 277 - 279
[14] Li Q and Zhang LF. 2004. The P-T path and geological significance of low-pressure granulite-facies metamorphism in Muzhaerte, Southwest Tianshan. Acta Petrologica Sinica, 20(3): 583 -594
[15] Liou J G, Tsujimori T, Zhang R Y et al. 2004. Global UHP Metamorphism and Continental Subduction/Collision: The Himalayan Model. Ind. Geol. Rev. , 46:1 -27
[16] Liou J G, Zhang R Y, Ernst W G, Rumble Ⅲ D and Maruyama S.1998. High-pressure minerals from deeply subducted metamorphic rocks. In, Ultrahigh-pressure Mineralogy, Physics and Chemistry of the Earth Deep Interior. (Paul L. Ribbe ed. ), Mineralogical Society of America, Reviews in Mineralogy, 37:33 -138
[17] Reinecke T. 1991. Very-high-pressure metamorphism and uplift of coesite-bearing metasediments from the Zermatt-Saas zone, Western Alps. European Journal of Mineralogy, 3:7 -17
[18] Reinecke T. 1998. Prograde high- to ultrhigh-pressure metamorphism and exhumation of oceanic sediments at Lago di Cignana, Zermatt-Saas Zone, western Alps. Lithos, 42:147 - 189
[19] Rubatto D, Liati A and Gebauer D. 2003. Dating UHP metamorphism,In: Ultrahigh Pressure Metamorphism ( Ed: Carswell & Compagnoni). European Mineralogical Union Notes in Mineralogy,Eotvos University Press, Budapest, 341 - 363
[20] Sato K and Katsura T. 2001. Experimental investigation on dolomite dissociation into aragonite + magnesite up to 8.5 Gpa. Earth and Planetary Science Letter, 184:529-534
[21] Seaillet S. 1996. Excess 40Ar transport scale and mechansim in high pressure phengite: A case study from an eclogitized metabasite of the Dora2Maira nappe, western Alps. Geochim. Cosmochim. Acta, 60(6): 1075 -1090
[22] Schreyer W. 1995. Ultrndeep metamorphic rocks, the retrospective viewpoint. Journal of Geophysical Research, 100:8353 -8366
[23] Sun S S, McDonough W F. 1989. Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes.In: Saunders, A. D. , Norry, M.J. ( Eds. ), Magmatism in the Ocean Basin. Geol. Soc. Spec. Publ., 42:313-345
[24] Tagiri M, Yano T, Bakirov A, Nakajima T and Uchiumi S. 1995. Mineral parageneses and metamorphic P-T paths of ultrahigh-pressure eclogites from Kyrghyastan Tien-Shan. The Island Arc, 4: 280 - 292
[25] Tagiri et al. 2001. HP-UHP eclogitic rocks included in ULPM pelitic schists, Makbal Kyrgyzstan: imply tectonic m lange by ascending of UHPMR. Abstract of Sixth International Eclogite Conference, 158
[26] Thoeni M and Jagoutz E. 1992. Some new aspects of dating eclogites in orogenic belts: Sm/Nd, Rb/Sr and Pb/Pb isotopic results from the Austroalpine Saualpe and Koralpe type locality. Geochim.Cosmochim. Acta, 56:347-368
[27] Thoni M. 2002. Erratum: Sm-Nd isotope systematics in garnet from different lithologies ( Eastern Alps ): age results, and an evaluation of potential problems for garnet Sm-Nd chronometry. Chemical Geology, 194:353 - 379
[28] Tonarini S, Villa I M, Oberl F. 1993. Eocene age of eclogite metamorphism in Pakistan Himalaga: Implications for India2Eurasia collision. Terra Nova, 5: 13 -20
[29] Wang Baoyu, Lang Zhijun, Li Xiangdong et al. 1994. The geological cross section of Chinese western Tianshan. Beijing: Science Press
[30] Wang Guangrui. 1996. Explanation to the Regional Geological Structures and Geological Evolution of Northern Xinjiang in China and its Adjacent Regions. Press of China University of Geosciences
[31] Wang Zuoxun et al. 1990. The multiple Cycle Tectonic Evolution and metallogenics. Beijing: Science Press
[32] Waters D J and Martin H N. 1993. Geobarometry of phengite-bearing eclogites. Terra Abstracts, 5: 410 -411
[33] Yang Jingsui, Zhang Jianxin, Meng Fanchong, Shi Yindeng, Wu Chailai. 2003. The protoliths of UHP eclogites from Northern Qaidam-Altun, Western China. Earth Science Frontiers, 10:291 -313
[34] Zhang L F, Ellis D J and Jiang W. 2002a. Ultrahigh pressure metamorphism in western Tianshan, China, part Ⅰ: evidences from the inclusion of coesite pseudomorphs in garnet and quartz exsolution lamellae in omphacite in eclogites. American Mineralogist, 87:853-860
[35] Zhang L F, Ellis D J, Arculus R J et al. 2003a. Ultradeep subduction of carbonates to the mantle: evidence from the carbonate reaction of magnesite + calcite (aragonite) = dolomite in metapelites from western Tianshan, China, Journal of Metamorphic Geology, 21: 523- 529
[36] Zhang L F, Ellis D J, Williams S et al. 2002b. Ultrahigh pressure metamorphism in western Tianshan, China, part Ⅱ: evidence from magnesite in eclogite. American Mineralogist, 87: 861 - 866
[37] Zhang L F, Song S G, Ai Y L et al. 2005. Relict coesite exsolution in omphacite from western Tianshan eclogites, China. American Mineralogist, 89:180 - 186
[38] Zhang L, Gao J, Ekerbair S and Wang Z. 2001. Low temperature eclogite facies metamorphism in Western Tianshan, Xinjiang.Soience in China (Series D) , 44:85 -96
[39] Zhang L, Song S, Song B et al. 2003. SHRIMP U-Pb zircon dating of HP-UHP metamorphic rocks from Western Tianshan, China.Abstract of The Alice Wain Memorial Western Norway Eclogite Field Symposium. NGU report, 055:180
[40] Zhang LF, Ai Y, Song S, Song B, Rubatto D, Williams S, Liou J G,Ellis D. 2005. Triassic collision of Western Tianshan orogenic belt,China: evidences from SHRIMP U-Pb dating of zircon from eclogitic rocks. EPSL, ( in review)
[41] Zhang LF, Ellis DJ, Williams S and Jiang WB. 2003b. Ultrahigh pressure metamorphism in western Tianshan, China-Reply.American Mineralogist, 1157 - 1160
[42] Zhang LF, Ellis DJ, Ai YL, Jiang WB and Wei CJ. 2002. Ultrahigh pressure metamorphic eclogite in Western Tianshan Mountains,Xinjiang. Acta Prteologica et Mineralogica, (4): 371 -386
[43] 艾永亮,张立飞,李旭平,曲俊峰.2005.新疆西南天山昭苏一带超高压变质榴辉岩、蓝片岩地球化学特征及其大地构造意义,自然科学进展,(印刷中)
[44] 李强,张立飞.2004.西南天山木扎尔特一带低压麻粒岩相变质作用PT轨迹及其地质意义.岩石学报,20:583-594
[45] 高俊,张立飞,刘伟.2000.西天山蓝片岩榴辉岩形成和抬升的40Ar-39Ar年龄记录.科学通报,45:89-94
[46] 王作勋等.1990.天山多旋回构造演化及成矿.北京:科学出版社
[47] 王宝瑜,郎智君,李向东等.1994.中国天山西段地质剖面综合研究.北京:科学出版社
[48] 王广瑞.1996.中国新疆北部及邻区构造-建造图说明书.中国地质大学出版社
[49] 杨经绥,张建新,孟繁聪,史仁灯,吴才来等.2003.中国西部柴北缘-阿尔金的超高压变质榴辉岩及其原岩性质探讨.地学前缘,10:291-313
[50] 张立飞,Ellis D J,艾永亮等.2002.新疆西天山超高压变质榴辉岩.岩石矿物学杂志,21:371-386
[51] 张立飞,高俊,艾科拜尔等.2000.新疆西天山低温榴辉岩相变质作用研究.中国科学(D辑),30:345-354
-
计量
- 文章访问数: 9790
- PDF下载数: 10285
- 施引文献: 0
下载: