Mantle peridotite xenoliths and the nature of lithospheric mantle in Abaga, Inner Mongolia
-
摘要:
阿巴嘎地区新生代地幔捕掳体岩性主要为尖晶石二辉橄榄岩，矿物组成有橄榄石(Fo89-91)、单斜辉石(Wo43-49En44-49Fs3-11)、斜方辉石(Wo0.7-2.2En88-91Fs8-11)和铬尖晶石(Cr6-20#)。橄榄岩结构以碎斑结构为主，除此还可见海绵边结构、重结晶结构、粗粒结构和变晶结构，部分橄榄石发育膝折带和伊丁石化现象，这些特征暗示该区地幔经历了较强烈的熔体-岩石圈相互作用和复杂的演化过程。大地构造位置上，阿巴嘎与大兴安岭哈拉哈河-绰尔河及五大连池-科洛同处在兴蒙造山带上，但阿巴嘎表现出与华北克拉通西部北缘相似的热状态及饱满型-过渡型的岩石圈地幔性质，区别于大兴安岭中部具有古老残留的岩石圈地幔，暗示着兴蒙造山带之下的岩石圈地幔存在时空上的不均一性。而这种大尺度岩石圈地幔的不均一性可能与软流圈-岩石圈相互作用程度、上地幔复杂的地质演化及兴蒙造山带内部不同块体的活动强度、时间等性质有关。
Abstract:Mantle peridotite xenoliths form Abaga area, Inner Mongolia, predominantly contain spinel lherzolites, which consist of olivine(Fo89-91), clinopyroxene(Wo43-49En44-49Fs3-11), orthopyroxene(Wo0.7-2.2En88-91Fs8-11)and spinel(Cr6-20#). Most peridotites exhibit porphyroclastic texture, in addition, there are edged sponge texture, mosaic granoblastic texture, coarse texture and catablastic texture. Kink bands and iddingsitization are common in olivine. These characteristics suggest that the history of the upper mantle underneath Abaga area is complex and experiences strong melt-lithosphere interaction. Tectonically, both Abaga area and the central Great Xing’an Range lie on the Xing’an-Mongolia Orogen Belt; however, the former has the nature of medium-low temperature thermal state and the fertile-transitiona lithospheric mantle, which is similar to the northern margin of North China Craton but distinguished from the central Great Xing’an Range that has a great amount of aged lithospheric mantle. This difference indicates that the lithospheric mantle underneath the Xing’an-Mongolia Orogenic Belt may be heterogeneous in time and space. The diverse degree of asthenosphere-lithosphere interactions, the complex of upper mantle geological evolution, besides, blocks form the Xing’an-Mongolia Orogenic Belt have distinct nature of activity time, intensity, etc, all this lead to a large scale heterogeneous of the lithospheric mantle.
-
-
图 1
研究区位置图(据Xu and Bodinier, 2004；葛文春等，2007)
Figure 1.
Location map of the studying area(after Xu and Bodinier, 2004；Ge et al., 2007)
图 3
辉石分类图(据Morimoto et al., 1988)
Figure 3.
Classification diagram of pyroxene(after Morimoto et al., 1988)
图 6
部分熔融程度F(%)- Mg# (Ol)图(据Hellebrand et al., 2001)
Figure 6.
Diagram of melting degree F (%) vs. Mg# (olivine) (after Hellebrand et al., 2001)
图 7
地幔捕掳体全岩Al2O3-CaO图
Figure 7.
Diagram of Al2O3 vs. CaO in whole rock of peridotite xenoliths
-
Bai DH, Zhang L and Kong XR. 1993. A magnetotelluric study of the Paleozoic collision zone in the east of Inner Mongolia: Ⅱ. Two-dimensional modelling. Chinese J. Geophys., 3(6): 773-783(in Chinese with English abstract)
Bertrand P and Mercier J. 1985. The mutual solubility of coexisting ortho- and clinopyroxene: Toward an absolute geothermometer for the natural system? Earth and Planetary Science Letters, 76: 109-122
Brey GP, Köhler T and Nickel KG. 1990. Geothermobarometry in four-phase lherzolites: I. Experimental results from 10 to 60 kb. Journal of Petrology, 31: 1313-1352
Chen SS, Fan QC, Zhao YW and Sui JL. 2011. Geological characteristics and genesis of basalt platform in beilike, Inner Mongolia. Seismology and Geology, 33(2): 430-439(in Chinese with English abstract)
Chen X and Zheng JP. 2009. Mineral chemistry of peridotite xenoliths in Yangyuan Cenozoic basalts: Significance for lithospheric mantle evolution beneath the North China Craton. Earth Science, 34: 203-219(in Chinese with English abstract)
Deng FL and Macdougall JD. 1992. Proterozoic depletion of the lithosphere recorded in mantle xenoliths from Inner Mongolia. Nature, 360(26): 333-336
Du W, Han BF, Zhang WH and Liu ZQ. 2006. The discovery of peridotite xenoliths and megacrysts in Jining, Inner Mongolia. Acta Petrologica et Mineralogica, 25(1): 13-23(in Chinese with English abstract)
Fan QC and Hooper PR. 1989. The mineral chemistry of ultramafic xenoliths of eastern China: Implications for upper mantle composition and the paleogeotherms. Journal of Petrology, 30: 1117-1158
Fan QC, Sui JL, Zhao YW, Li N and Du XX. 2008. Preliminary study on garnet peridotite xenolith of Quaternary volcanic rocks in middle Daxing’an Mountain Range. Acta Petrologica Sinica, 24(11): 2563-2568(in Chinese with English abstract)
Fang TH and Ma HW. 1997. Optimal geothermobarometers for constructing paleogeotherm. Geol. Sci. Tech. Info., 16(4): 93-100(in Chinese with English abstract)
Ge WC, Wu FY, Zhou CY and Zhang JH. 2007. Metallochronology of porphyry Cu, Mo deposits in the eastern Xing-Monogolian orogenic belt (XMOB) and its implication for metallogenic geodynamics. Chinese Science Bulletin, 52(20): 2047-2417(in Chinese)
Griffin WL, Shee SR, Ryan CG, Win TT and Wyatt BA. 1999. Harzburgite to lherzolite and back again: Metasomatic processes in ultramafic xenoliths from the Welton kimberlite, Kimbreley, South Africa. Contrib. Mineral. Petrol., 134:232-250
Griffin WL, O’Reilly SY, Abe N, Aulbach S, Davies RM, Pearson NJ, Doyle BJ and Kivi K. 2003. The origin and evolution of Archean lithospheric mantle. Precambrian Research, 127: 19-41
Harte B. 1977. Chemical carisations in upper mantle nodules from southern African kimberlites. Journal of Petrology, 85: 279-288
Hellebrand E, Snow JE, Dick HJB and Hofmann AW. 2001. Coupled major and trace elements as indicators of the extent of melting in mid-ocean-ridge peridolities. Nature, 410: 677-680
Ho KS, Liu Y, Chen JC and Yang HJ. 2008. Elemental and Sr-Nd-Pb isotopic compositions of Late Cenozoic Abaga basalts, Inner Mongolia: Implications for petrogenesis and mantle process. Geochemical Journal, 42: 339-357
Huang XL and Xu YG. 2010. Thermal state and structure of the lithosphere beneath eastern China: A synthesis on basalt-borne xenoliths. Journal of Earth Science, 21: 711-730
Ionov DA, O’Reilly SY, Genshaft YS et al. 1996. Carbonate-bearing mantle peridotite xenoliths from Spitsbergen: Phase relationships, mineral compositions and trace-element residence. Contributions to Mineralogy and Petrology, 125: 375-392
Kononova VA, Kurat G, Embey-Isztin A, Perovov VA and Brandsttter F. 2002. Geochemistry of metasomatised spinel peridotite xenoliths from the Dariganga Plateau, South-eastern Mongolia. Mineralogy and Petrology, 75: 1-21
Li JY, Zhang J, Yang TN, Li YP, Sun GH, Zhu ZX and Wang LJ. 2009. Crustal tectonic division and evolution of the southern part of the Northern Asian orogenic region and its adjacent areas. Journal of the Jilin University (Earth Science Edition), 39(4): 584-605(in Chinese with English abstract)
Li SL and Ouyang ZY. 1998. Tectonic framework and evolution of Xing’an-Mongolian orogenic belt (XMOB) and its adjacent region. Marine Geology & Quaternary Geology, 18(3): 45-54(in Chinese with English abstract)
Liu RX, Yang ME, Xu HJ, Guo JD and Wang WH. 1981. Preliminary study of ultramafic xenoliths from Cenozoic alkaline basalts in north china. Seismology and Geology, 3(3): 1-16(in Chinese with English abstract)
Lu FX. 1987. Mantle Petrology. Wuhan: China University of Geosciences Press, 92-105 (in Chinese)
Morimoto N, Fabries JA, Ferguson AK et al. 1988. Nomenclature of pyroxenes. Mineralogical Magazine, 52: 535-550
O’Reilly SY, Griffin WL, Djomani PYH and Morgan P. 2001. Are lithospheres forever? Tracking changes in subcontinental lithospheric mantle through time. GSA Today, 11: 4-10
Pearson DG. 1999. The age of continental roots. Lithos, 48: 171-194
Rudnick RL, Mcdonough WF and Chappell BW. 1993. Carbonatite metasomatism in the northern Tanzanian mantle: Petrographic and geochemical characteristics. Earth and Planetary Science Letters, 114: 463-475
Rudnick RL, Gao S, Ling WL, Liu YS and McDonough WF. 2004. Petrology and geochemical of spinel peridotite xenoliths form Hannuoba and Qixia, North China Craton. Lithos, 77(9): 609-937
Shao JA, Zhang LQ, Mou BL and Han QJ. 2007. The Surge of the Great Xingan Range and Geochemical Background. Beijing: Geological Publishing House, 1-251(in Chinese)
Tang YJ, Zhang HF, Nakamura E, Moriguti T, Kobayashi K and Ying JF. 2007. Lithium isotopic systematics of peridotite xenoliths from Hannuoba, North China Craton: Implications for melt-rock interaction in the considerably thinned lithospheric mantle. Geochimica et Cosmochimica Acta, 71: 4327-4341
Tang YJ, Zhang HF, Ying JF, Zhang J and Liu XM. 2008. Refertilization of ancient lithospheric mantle beneath the central North China Craton: Evidence from petrology and geochemistry of peridotite xenoliths. Lithos, 101: 435-452
Tang YJ, Zhang HF, Nakamura and Ying JF. 2011. Multistage melt/fluid-peridotite interactions in the refertilized lithospheric mantle beneath the North China Craton: Constraints from the Li-Sr-Nd isotopic disequilibrium between minerals of peridotite xenoliths. Contributions to Mineralogy and Petrology, 161: 845-861
Wang Q, Liu XY and Li JY. 1991. Plate Tectonics between Cathaysia and Angaraland in China. Beijing: Geological Publishing House, 50-60(in Chinese)
Wang YM, Griffin WL and Han BF. 2011. A preliminary study on the lithospheric mantle beneath the northern part of the western North China Craton. Acta Petrologica Sinica, 27(10): 2912-2926(in Chinese with English abstract)
Wells P. 1977. Pyroxene thermometry in simple and complex systems. Contributions to Mineralogy and Petrology, 62: 129-139
Wiechert U, Ionov DA and Wedephol KH. 1997. Spinel peridotite xenoliths from the Atsagin-Dush volcano, Dariganga lava plateau, Mongolia: A record of partial melting and cryptic metasomatism in the upper mantle. Contributions to Mineralogy and Petrology, 126: 345-364
Windley BF, Alexeiev D, Xiao WJ, Kröner A and Badarch G. 2007. Tectonicmodelsfor accretion of the Central Asian Orogenic Belt. Journal of the Geo1ogial Society, 164: 31-48
Wood BJ and Banno S. 1973. Garnet-orthopyroxene and orthopyroxene-clinopyroxene relationships in simple and complex systems. Contribution to Mineralogy and Petrology, 42: 109-124
Wu FY, Ge WC, Sun DY and Guo CL. 2003. Discussion on the lithospheric thinning in eastern China. Earth Science Frontiers, 10(3): 51-60(in Chinese with English abstract)
Xu YG. 1993. Geothermometers applicable to the mantle xenoliths. Acta Petrologica Sinica, 9: 167-180(in Chinese with English abstract)
Xu YG and Bodinier JL. 2004. Contrasting enrichments in high- and low-temperature mantle xenoliths from nushan, eastern China: Results of a single metasomatic event during lithospheric accretion? Journal of Petrology, 45: 321-341
Yang JJ. 1988. The petrology study of Cenozoic basalt Ximeng region in the Inner Mongolia. Acta Petrologica Sinica, 4(2): 13-32(in Chinese with English abstract)
Zhang C, Han Bf, Tong Y and Li GC. 2004. General characteristics and origin of Cenozoic basalt from Abagaqi region, Inner Mongolia. Journal of Jilin University (Earth Science Edition), 34(1): 21-26(in Chinese with English abstract)
Zhang C, Liu SW, Han BF and Li GC. 2006. Characteristics of ultramafic xenoliths from Cenozoic basalts in Abagaqi area, Inner Mongolia. Acta Petrologica sinica, 22(11): 2801-2807(in Chinese with English abstract)
Zhang HF, Nakamura E, Kobayashi K, Zhang J, Ying JF, Tang YJ and Niu LF. 2007. Transformation of subcontinental lithospheric mantle through deformation-enhanced peridotite-melt reaction: Evidence from a highly fertile mantle xenolith from the North China craton. International Geology Review, 49: 658-679
Zhang HF, Goldstein SL, Zhou XH, Sun M and Cai Y. 2009. Comprehensive refertilization of lithospheric mantle beneath the North China Craton: Further Os-Sr-Nd isotopic constraints. Journal of the Geological Society, 166: 249-259
Zhang M, Suddaby P, O’Reilly SY, Norman M and Qiu JX. 2000. Nature of the lithospheric mantle beneath the eastern part of the Central Asian fold belt: Mantle xenolith evidence. Tectonophysics, 328: 131-156
Zhang SH, Zhao Y, Liu JP, Hu JM, Song B, Liu J and Wu H. 2010. Geochronology, geochemistry and tectonic setting of the Late Paleozoic-Early Mesozoic magmatism in the northern margin of the North China Block: A preliminary review. Acta Petrologica et Mineralogica, 29(6): 824-842(in Chinese with English abstract)
Zhao YW and Fan QC. 2011. Characteristics of lithospheric mantle beneath the Great Xing’an Range: Evidence from spinel peridotite xenoliths in the Halaha River and Chaoer River area.Acta Petrologica Sinica, 27(10): 2833-2841(in Chinese with English abstract)
Zheng JP. 1999. Meso-cenozoic mantle Replacement and lithospheric Thinning in Eastern China. Wuhan: China University of Geosciences Press, 13-68(in Chinese)
Zheng JP, O’Reilly SY, Griffin WL, Lu FX, Zhang M and Pearson NJ. 2001. Relict refractory mantle beneath the eastern North China block: Significance for lithosphere evolution. Lithos, 57: 43-66
Zheng JP, Griffin WL, O’Reilly SY, Yang JS, Li TF, Zhang M, Zhang RY and Liou JG. 2006. Mineral chemistry of peridotites from Paleozoic, Mesozoic and Cenozoic lithosphere: Constraints on mantle evolution beneath eastern China. Journal of Petrology, 47: 2233-2256
Zheng JP, Griffin WL, O’Reilly SY, Yu CM, Zhang HF, Pearson N and Zhang M. 2007. Mechanism and timing of lithospheric modification and replacement beneath the eastern North China Craton: Peridotitc xenoliths from the 100Ma Fuxin basalts and a regional synthesis. Geochimca et Cosmochimca Acta, 71: 5203-5225
Zhou Q, Wu FY, Chu ZY, Yang YH, Sun DY and Ge WC. 2007. Sr-Nd-Hf-Os isotopic charaeterizations of the Jiaohe peridotite xenoliths in Jilin Province and constraints on the lithospherie mantle age in northeastern China. Acta Petrologica Sinica, 23(6): 1269-1280(in Chinese with English abstract)
Zhou YT, Zheng JP, Yu CM, Chen X and Zhang HM. 2010. Peridotite xenoliths in Jining Cenozoic basalts: Mineral-chemistry and significance for lithsopheric mantle evolution beneath the North China Craton. Acta Petrologica et Mineralogica, 29(3): 244-257(in Chinese with English abstract)
-
下载:
图(8)
计量
- 文章访问数: 8363
- PDF下载数: 5428
- 施引文献: 0