东天山咸水泉片麻状花岗岩特征、年龄及成因
Characteristics, age and origin of the Xianshuiquan gneissose granite in eastern Tianshan
-
摘要: 野外地质关系及岩相学、地球化学、同位素和年代学研究表明,咸水泉片麻状花岗岩是典型的原地改造型花岗岩,其原岩(即围岩)为糜棱岩化花岗闪长岩。本次锆石LA-ICP-MS U-Pb定年获得其原岩糜棱岩化花岗闪长岩^206Pb/^238U加权平均年龄为369.9±5.6Ma(MSWD=36),片麻状花岗岩锆石核部年龄为367.9±5.4Ma(MSWD=2.2),此年龄与其原岩年龄在误差范围内一致,为片麻状花岗岩原地改造成因提供了年代学证据。此外。还获得其锆石热液增生边不一致线下交点年龄254±10Ma(MSWD=1.4),该年龄代表了片麻状花岗岩的形成时间。片糜状花岗岩在地球化学上继承了许多原岩的特征,同时又受到了深源流体-熔体的显著影响。将原岩糜棱岩化花岗闪长岩改造成片麻状花岗岩的流体-熔体具有富硅富钾和正БNd(t)值的特征,表明这种流体-熔体可能主要地来自幔源岩浆内侵体,以及在内侵岩浆热量作用下的初生地壳岩石的变质和熔融。原岩糜棱岩化花岗闪长岩及其派生的片麻状花岗岩БNd(t)值分别为+3.87及+3.05~+6.09,表明糜棱岩化花岗闪长岩源自于年轻的陆壳,而片麻状花岗岩除继承了其原岩糜棱岩化花岗闪长岩的高БNd(t)值这一特征外,还可能受到了深源流体.熔体中幔源组分的影响。咸水泉岩体的实例研究表明,原地改造型片麻状花岗岩不但可以形成于造山带的挤压-伸展转折阶段,还可以形成于碰撞后进一步伸展的时期,而经过强烈韧性剪切的岩石是转变为片麻状花岗岩的最有利原岩。东天山咸水泉、平顶山和天湖东等原地改造型片麻状花岗岩的形成均与内侵有关,因而片麻状花岗岩可被看作是内侵的重要产物。
-
Key words:
- Gneissose granite /
- LA-ICP-MS zircon dating /
- Ductile shear zone /
- lntraplating /
- Continental growth /
- Xianshuiquan /
- Eastern Tianshan
-
[1] Bea F and Montero P.1999. Behavior of accessory phases and redistribution of Zr,REE,Y,Th,and U during metamorphism and partial melting of metapelites in the lower crust:An example from the Kinzigite Formation of Ivrea-Verbano,NW Italy.Geochimica et Cosmochimica Acta,63:1133-1153
[2] Bickle MJ,Hawkesworth CJ,England PC and Athey D.1975. A preliminary thermal model for regional metamorphism in the Eastern Alps.Earth Planet.Sci.Lett.,26:13-28
[3] Boulter CA,Fotios MG and Phillips GN.1987. The Golden Mile,Kalgoorlie:A giant gold deposit localized in ductile shear zones by structurally induced infiltration of an auriferous metamorphic fluid.Econ.Geol.,82:1661 -1678
[4] Boynton WV.1984. Cosmochemistry of the rare earth elements:Meteorolite studies.In:Henderson P (ed).Rear Earth Element Geochemistry.Armsterdam:Elsevier Science Publishers,63-114
[5] Brown M and Solar GS.1999. The mechanism of ascent and emplacememt of granite magma during transpression:A syntectonic granite paradigm.Tectonophysics,312(1):1 -33
[6] Burrett CF.1972. Plate tectonics and the Hercynian orogen.Nature,239:155-157
[7] (C)ern(y) P,Meintzer RE and Anderson AJ.1985. Extreme fractionation in rare-element granitic pegmatites:Selected examples of data and mechanisms.Can.Mineral.,23:381 -421
[8] Chappell BW and White AJR.1974. Two contrasting granite types.Pacific Geol.,8:173-174
[9] Chen F,Hegner E and Todt W.2000. Zircon ages,Nd isotopic and chemical compositions of orthogneisses from the Black Forest,Germany-evidence for a Cambrian magmatic arc.International Journal of Earth Sciences,88:791 -802
[10] Chen YJ.1996. Fluidization model for intracontinental collision and its metallogenic significance:Theoretical inference and evidences from gold deposits,the eastern Qinling Mountains (in Chinese with English abstract)
[11] Chen ZF and Liang YH.1985. Research on several problems of structural geology in Tianshan.Xinjiang Geology,3(2):1-13 (in Chinese with English abstract)
[12] Clemens JD.2003. S-type granitic magmas-petrogenetic issues,models and evidence.Earth-Science Reviews,61:1-18
[13] England PC and Thompson AB.1984. Pressure-temperature-time paths of regional metamorphism,1:Heat transfer during the evolution of regions of thickened continental crust.J.Petrol.,25:894-928
[14] England PC and Thompson AB.1986. Some thermal and tectonic models for crustal melting in continental conllision zones.In:Coward MP and Rice AC (eds).Collision Tectonics.Geological Society,London:Special Publication,19:83 -94
[15] Fang GQ.1994. Paleozoic Plate Tectonics of Eastern Tianshan Mountains,Xinjiang,China.Acta Geologica Gansu,3(1):34 -40(in Chinese with English abstract)
[16] Franzini M,Leoni L and Saitta M.1972. A simple method to valuate the matrix effect in X-ray fluorescence analysis.X-ray Spectrom.,1:151-154
[17] Gao JF,Lu JJ,Lai MY,Lin YP and Pu W.2003. Analysis of trace elements in rock samples using HR-ICIMS.Journal of Nanjing University (Natural sciences),39(6):844 -850 (in Chinese with English abstract)
[18] Geisler T,Pidgeon RT,Kurtz R,van Bronswijk W and Schleicher H.2003a.Experimental hydrothermal alteration of partially metamict zircon.Am.Mineral.,88:1496-1513
[19] Geisler T,Rashwan AA,Rahn MKW,Poller U,Zwingmann H,Pidgeon RT,Schleicher H and Tomaschek F.2003b.Low temperature hydrothermal alteration of natural metamict zircons from the Eastern Desert,Egypt.Mineral.Mag.,67:485-508
[20] Geology Department,Nanjing University.1981. Granites of Different Ages of South China and Their Metallogenic Relations.Beijing:Science Press,1 -395 (in Chinese)
[21] Grotenhuis SM,Trouw RAJ and Passchier CW.2003. Evolution of mica fish in mylonitic rocks.Tectonophysics,372:1 -21
[22] Gu LX,Hu SX,Yu CS,Wu CZ and Yan ZF.2001. Initiation and evolution of the Bogda subduction-torn-type rift.Acta Petrologica Sinica,17(4):585 -597 (in Chinese with English abstract)
[23] Gu LX and McClay KR.1994. Pressure solution of sulphides in some Massive sulphide zinc-lead deposits of Western Canada:Its significance in mobilization of ore-forming materials.Chinese Journal of Geochemistry,13(2):132-141
[24] Gu LX,Yang H,Yan ZF and Liao JJ.1996. Geology and genesis of peraluminous granites in East Tianshan Upper Paleozoic island arc belt.Chinse Journal of Geochemistry,15(1):33 -43
[25] Gu LX,Zhang ZZ,Wu CZ,Tang JH,San JZ,Wang CS and Zhang GH.2007. Permian geothermal events of the Huangshan-Jing\'erquan area,eastern Tianshan:Indications for mantle magma intraplating and its effect on the crust.Acta Petrologica Sinica,(under review)
[26] Gu LX,Zhang ZZ,Wu CZ,Wang YX,Tang JH,Wang CS,Xi AH and Zheng YC.2006. Some problems on granites and vertical growth of the continental crust in the eastern Tianshan Mountains,NW China.Acta Petrologica Sinica,22(5):1103 -1120 (in Chinese with English abstract)
[27] Gu LX,Zhu JL,Gu JC,Liao JJ,Yan ZF and Yang H.1995. Geology and Genesis of the Mafic-Ultramafic Complexes in the HuangshanJing\'erquan Belt,East Xinjiang.Chinese Journal of Geochemistry,14(2):97 -116
[28] Gu LX,Zheng YC,Tang XQ,Wu CZ and Hu WX.2006. Advances in research of sulphide ore textures and their implications for ore genesis.Progress in Natural Science,16(10):1007 -1021
[29] Guo ZJ and Ma RS.1990. A study on the Later Paleozoic Kangggur interarc basin in eastern Tianshan.Journal of Nanjing University (Earth Sciences Edition),2 (3):103-113 (in Chinese with English abstract)
[30] Han BF,Ji JQ,Song B,Chen LH and Li ZH.2004. SHRIMP zircon U-Pb ages of Kalatongke No.1 and Huangshandong Cu-Ni bearing mafic and ultra-mafic complexes,North Xinjiang,and geological implications.Chinese Science Bulletin,49(22):2424-2429
[31] He SX,Duan JR,Liu JS and Zhang ZR.1996. Ductile shear zone structure and metallogeny.Beijing:Geological Publishing House,1-174 (in Chinese)
[32] Hoskin PWO and Schaltegger U.2003. The composition of zircon and igneous and metamorphic petrogenesis.In:Hanchar JM and HoskinPWO (eds).Reviews in Mineralogy & Geochemistry,Mineralogical Society of America & Geochemical Society,53:27-62
[33] Hoskin PWO.2005. Trace-element composition of hydrothermal zircon and the alteration of Hadean zircon from the Jack Hills,Australia.Geochimica et Cosmochimica Acta,69(3):637 -648,
[34] Hu AQ,Wang ZG and Tu GC.1997. Geological Evolution,Petrogenesis and Metallogeny of North Xinjiang.Beijing:Science Press,1-246(in Chinese)
[35] Hu SX,Guo JC and Lu XX.1989. A comparison between the autochthonous and parautochthonous transformation type granitoids in east Qinling and south China Caledonian foldbelts.Acta Petrologica Sinica,(1):49 -58 (in Chinese with English abstract)
[36] Hu SX and Ling QL.1988. The geology and metallogeny of the amalgamatioin zone between ancient North China and South China plate (Taking Qinling Tongbai as an example).Nanjing:Publishing House of Nanjing University,1-558 (in Chinese)
[37] Hu ZH,Zhou SZ and Hu SX.1986. Characteristics of migmatites in Taihua Group of western Henan in relation to gold and molybdenum mineralizations.Mineral Deposits,5(4):71 -81 (in Chinese with English abstract)
[38] Johannes W.1983. On the origin of layered migmatites.In:Atherton MP and Gibble CD (eds).Migmatites,Melting and Metamorphism.Shiva Publishing Limited,234-248
[39] Jung S,Hoernes S,Masberg P and Hoffer E.1999. The petrogenesis of some migmatites and granites (central Damara orogen,Namibia):Evidence for disequilibrium melting,wall rock contamination and crystal fractionation.J.Petrol.,40:1241 -1269
[40] Keppler H and Wyllie PJ.1990. Role of fluids in transport and fractionation of uranium and thorium in magmatic processes.Nature,348:531 -533
[41] Leake BE,Brown GC and Hallyday AN.1980. The origin of granite magms.J.Geol.Soc.,137:93 -96
[42] Li HQ,Chen FW,Lu YF,Yang HM and Mei YP.2004. Zircon SHRIMP U-Pb age and strontium isotopes of mineralized granitoids in the Sanchakou Copper Polymetallic deposit,East Tianshan Mountains.Acta Geoscientica Sinica,25 (2):191-195 (in Chinese with English abstract)
[43] Li JY,Xiao WJ,Wang KZ,Sun GH and Gao LM.2003. Neoproterozoic-Paleozoic tectonostratigraphy,magmatic activities and tectonic evolution of eastern Xinjiang,NW China.In:Mao JW,Goldfarb,Seltmann,Wang,Xiao and Hart (eds).Tectonic Evolution and Metallogeny of the Chinese Altay and Tianshan.Proceedings Volume of the International Symposium of the IGCP-473 Project in Urumuqi and Guidebook of the Field Excursion in Xinjiang,China:August 9-21,IAGOD Guidbook Series 10:CERCAMS/NHM London,31 -74
[44] Li JY and Xian XC.1999. Brief Reviews on Some Issues of Framework and Tectonic Evolution of Xinjiang Crust,NW China.Scientia Geologica Sinica,34 (4):405-419 (in Chinese with English abstract)
[45] Ludwig KR.1991. ISOPLOT:A plotting and regression program for radiogenic-isotope data.US Geological Survey Open-File Report,39
[46] Ma RS,Wang CY and Ye SF.1993. Tectonic Framework and Crustal Evolution of Eastern Tianshan mountains.Nanjing:Publishing House of Nanjing University,1 -225
[47] Mao JW,Yang JM,Qu WJ,Du AD,Wang ZL and Han CM.2002. Re-Os Dating of Cu-Ni sulfide ores from Huangshandong deposit in Xinjiang and its Geodynamio significance.Mineral Deposits,21(4):323 -330 (in Chinese with English abstract)
[48] Marmo V.1971. Granite Petrology and the Granite Problem.Elsevier Publishing Company,1-244
[49] Miller R.1983. The Pan-African Damara orogen of South West Africa/Nsmibia.Geo1. Soc.South Africa Spec.Publ.,11:431 -515
[50] Oyinloye AO.1998. Geology,geochemistry and origin of the banded and granite gneisses in the basement complex of the liesha area,southwestern Nigeria.Journal of African Earth Sciences,26 (4):633-641
[51] Pati(n)o Dounce AE,Johnston AD and Rice JM.1990. Anatexis and metamorphism in tectonically thickened continental crust exemplified by the Sevier hinterland,Western North America.Earth and Planetary Science Letters,97:290-315
[52] Petford N,Cruden AR,McCaffrey KJW and Vigneresse JL.2000. Granite magma formation,transport and emplacement in the Earth\'s crust.Nature,408(7):669 -673
[53] Pitcher WS.1993. The nature and origin of granites.London:Blackie Academic & Professional,1 -321
[54] Qin KZ,Fang TH,Wang SL and Zhu BQ.2002. Plate tectonics division,evolution and metallogenic settings in Eastern Tianshan Mountains,NW-China.Xinjiang Geology,20 (4):302-308 (in Chinese with English abstract)
[55] Sandiford M and Powell R.1991. Some remarks on high-temperature-lowpressure metamorphism in convergent orogens.J.Metamorph.Geol.,9:333 -340
[56] Simpson C.1985. Deformation of granitic rock across the brittle-ductile transition.J.Struct.Geol.,7 (5):503-511
[57] Sun SS and McDonough WF.1989. Chemical and isotopic systematics of oceanic basalts:Implications for mantle composition and processes.In:Sauders AD and Norry MJ (eds).Magmatism in the Ocean Basins.Geol.Soc.London,Spec.Publ.,42:313 -354
[58] Tomaschek F,Kennedy AK,Villa IM,Lagos M and Ballhaus C.2003. Zircons from Syros,Cyclades,Greece:recrystallization and mobilization of zircon during high-pressure metamorphism.J.Petrol.,44:1977-2002
[59] Wang CY,Zhu WB and Ma RS.1992. Characteristics and origin of the Kushui Metamorphic belt in the eastern Tianshan mountains.Journal of Nanjing University (Natural Sciences Edition),28 (4):595 -604 (in Chinese with English abstract)
[60] Wang T.et al.2006. SHRIMP U Pb Zircon geochronology of the Altai No.3 Pegmatite,NW China,and its implications for the origin and tectonic setting of the pegmatite.Ore Geol.Rev.(2006).doi:10.1016/j.oregeorev.2006.10.001
计量
- 文章访问数: 7653
- PDF下载数: 10100
- 施引文献: 0