浙江普陀花岗杂岩体中的石英闪长质包体：斜长石内部复杂环带研究与岩浆混合史记录
Complex zoning texture in plagioclases from the quartz diorite enclave in the Putuo granitic complex, Zhejiang province: record of magma mixing
-
摘要: 浙江普陀花岗杂岩体包含若干石英闪长质包体，该类包体中存在三种不同类型的斜长石：正常环带的斜长石、筛孔构造的斜长石和酸性斜长石为核的“反环带”斜长石。根据斜长石的环带构造特征和成分分析，认为本区的岩浆演化过程大致如下：下部基性岩浆注入到上覆酸性岩浆中并进行混合作用，酸性岩浆中已结晶的富钠质斜长石晶体进入偏基性的混合岩浆中，部分熔融形成筛孔构造；随着端员岩浆的进一步混合，富钠质斜长石晶体与中性混合熔体仅形成粗糙的边界，而保留原先构造特征；同时混合岩浆可以直接结晶出正常环带斜长石，呈单颗粒或以膜的形式包围其它环带构造的长石。本文还通过与平潭角闪辉长岩杂岩体内筛孔斜长石的对比，认为斜长石的环带构造和成分可以反映岩浆源区特征和岩浆演化历史。Abstract: Three types of plagiaclases with distinel zoning texture have been recognized from the recent investigation of the quartzdiorite enclave at Putuo. Zhejiang Province: normally zoned plaginclase, sieve-textured plagioclase and "reverse-zoned" plagioclase. Based on the evidences from tire components and textures of the plagioclase, the following scenario about the magma evolution is tentatively suggested. The initial basic magma in the deeper chamber injected into the host acid magma, in which the crystallization of oligoclase had already started. Then the sieve texture was formed after the plagioclases were incorporated into the mafic magma, In the later stage of the mixing process, the rough-interface wag produced between acid plagioclase and melt. In addition, a normal zone was directly formed from the equilibrium mixing magma as a single crystal or the mantle. By comparing with the special sieved plagioclases in Pingtan complex, we suggest that the textures and chemical compositions of plagioclases record the features of magma sources and reflect the history of the magma evolution.
-
Key words:
- Magma mixing /
- Quartz-diorite enelave /
- Plagioclase /
- Sieve texture /
- Putuo
-
-
[1] ［1］Anderson U B, Eklund O. 1994. Cellular plagioclase intergrowths as a result of crystal-magma mixing in the Proterozoic A land Rapakivi batholith, SW Finland. Contrib. Mineral. Petrol. , 117:124-136
[2] ［2］Bateman R. 1995. The interplay between crystallization, replenishment and hybridization in large felsic magma chambers. Earth Science Reviews, 39: 91 - 106
[3] ［3］Baxter S, Feely M. 2002. Magma mixing and mingling textures in granitoids: examples from the Galway Granite, Connemara, Ireland.Mineralogy and Petrology, 76:63 -74
[4] ［4］Bogoch R, Avigad D, Weissbrod T. 2002. Geochemistry of the quartz diorite-granite association, Roded area, southern Israel. Journal of African Earth Sciences, 35:50 -60
[5] ［5］Castro A, Stephens W E. 1992. Amphibole polycrystalline clots in calcalkaline granitic rocks and their enclaves. Can. Mineral. , 30:1093-1112
[6] ［6］Castro A, Patino Douce A E, Corretg LG, de la Rosa JD, E1-Biad M, E1Hmidi H. 1999. Origin of peraluminous granites and granodiorites,Iberian massif, Spain:An experimental test of granite petrogenesis.Contrib. Mineral. Petrol. , 135:255 -276
[7] ［7］Castro A. 2001. Plagioclase morphologies in assimilation experiments:Implications for disequilibrium melting in the generation of granodiorite rocks. Mineralogy and Petrology, 71:31 -49
[8] ［8］Chen X M, Tan Q Q, Zhao G T. 2002. Plagioclase from the basalt of Okinawa Trough and its petrogenesis significance. Acta Petrologica Sinica, 18 (4): 482 -488 (in Chinese with English abstract)
[9] ［9］Chen X M, Zhao L Z, Lu JJ, Liu CS, Wang D. 1999. A comparative study of the feldspar from two types of acid volcanic-intrusive complexes in Tonglu and Xiangshan areas. Acta Petrologica Sinica,15 (2): 279 - 285 ( in Chinese with English abstract)
[10] ［10］Cole J W, Gamble J A, Burt R M, Carrol L D, Shelley D. 2001. Mixing and mingling in the evolution of andesite-dacite magmas; evidence from co-magmatic plutonic enclaves, Taupo Volcanic Zone, New Zealand. Lithos, 59:25 -46
[11] ［11］DLemos R S. 1996. Mixing between granitic and dioritic crystal mushes,Guernsey, Channel Islands,UK. Lithos, 38:233 -257
[12] ［12］Dong C W, Xu X S, Chen X M, Zhou X M. 1997. Mineralogical record of crystallization process of Pingtan hornblende gabbro, Fujian.ACTA Mineralogical Sinica, 17:285 -290 (in Chinese with English abstract)
[13] ［13］Dong C W, Li W X, Chen X M, Xu X S, Zhou X M. 1998. Late Mesozoic magma mixing in the southeast area of Fujian: petrological record of Pingtan igneous complexes. Progress in Natural Science. 8(5) :581 -586 (in Chinese)
[14] ［14］Eichelberger J C. 1978. Andesitic volcanism and crustal evolution.Nature, 275:21 -27
[15] ［15］Hibbard M J. 1981. The magma mixing origin of mantled feldspars.Contrib. Mineral. Petrol. , 76:158 - 170
[16] ［16］Izbekov P V, Eichelberger J C, Patino L C, Vogel T A, Ivanov B V.2002. Calcic cores of plagioclase phenocrysts in andesite from Karymsky volcamo: Evidence for rapid introduction by basaltic replenishement. Geology, 30 (9): 799 - 802
[17] ［17］Janou(s)ek V J, Braithwaite C JR, Bowes D R, Gerdes A. 2004. Magmamixing in the genesis of Hercynian calc-alkaline granitoids: an integrated petrographic and geochemical study of the S zava intrusion, Central Bohemian Pluton, Czech Pepublic. Lithos, 78:67 - 99
[18] ［18］Kuhn TS. 1970. The structure of scientific revolutions (2d ed. ).International Encyclopedia of Unified Science (vol. 2, no. 2 ),Chicago, University of Chicago Press, 310p.
[19] ［19］Ku( )cu G G, Floyd P A. 2001. Mineral compositional and textural evidence for magma mingling in the Saraykent volcanics. Lithos,56:207 - 230
[20] ［20］Li W X, Dong C W, Zhou X M. 1999. Plagioclase xenocryst and magma mingling in Pingtan and Zhangzhou Complexs. Acta Petrologica Sinica, 15 (2): 286 -290 (in Chinese with English abstract)
[21] ［21］Murphy M D, Sparks R S, Barclay J, Carroll M R, Brewer T S. 2002. Remobilization of andesite magma by intrusion of mafic magma at Soufriere Hills volcano, Montserrat, West Indies. J. Petrology, 41:21 -42
[22] ［22］Qiu J S, Wang D Z and Shen W Z. 2002. Late-Mesozoic A-type granite in the coast area of Zhejiang and Fujian Province. In: Wang D Z and Zhou X M (ed). The petrogenesis of Late-Mesozoic granitic volcanic-intruded complex and crustal evolution. Beijing: Science Press, 160- 173. (in Chinese)
[23] ［23］Snyder D, Crambes C, Tait S, Wiebe R A. 1997. Magma mingle in dikes and sills. J. Geol. , 105:75 -86
[24] ［24］Tegner C. 1997. Iron in plagioclase as a monitor of differentiation of the Skaergaard intrusion. Contrib. Mineral. Petrol. , 128:45-51
[25] ［25］Tsuchiyama A. 1985. Dissolution kinetics of plagioclase in the melt of the system diopside-albite-anorthite, and origin of dusty plagioclase in andesites. Contrib. Mineral. Petrol. , 89:1-16
[26] ［26］Vance J A. 1962. Zoning in igneous plagioclase: normal and oscillatory zoning. Am. Jour. Sci. ,260:746-760
[27] ［27］Vance J A. 1965. Zoning in igneous plagioclase: patchy zoning. J.Geol. , 73:636 -651
[28] ［28］Vernon R H. 1990. Crystallisation and hybridism in microgranitoid enclave magmas: microstructural evidence. J. Geophys. Res. , 95(B11): 17849 - 17859
[29] ［29］Wiebe R A. 1996. Mafic silicic layered intrusions: the role of basaltic injections on magmatic processes and the evolution of silicic magma chamber. Transactions of the Royal Society of Edinburgh: Earth Sciences,87: 233 -242
[30] ［30］Wilcox R E. 1999. Ideas of magma mixing: history of a struggle for acceptance. J. Geol., 107:421-432
[31] ［31］Wyllie P J, Cox K G,Biggar G M. 1962. The habit of apatite in syntheticsystems and igneous rocks. J. Petrology,3(2): 238-243
[32] ［32］Zhou X R, Wang F Z. 1987. Physics and chemistry of the rocks. Henan:Henan Science and Technology Press, 191 -197 (in Chinese)
[33] ［33］Zhu Y F. 1994. Petrological significance of zoned plagioclase in Eldjurti granite and mafic microgranular enclaves, North Caucasus, Russia.Chinese Journal of Geochemistry, 13(2): 142 - 154
[34] ［34］Zhu Y F. 1995. Plagioclase phenocrysts from Eldjurti granite and mafic microgranuclar enclave. Acta Scientiarum Naturalium, Universitatis Pekinensis, 31(3): 366-372 (in Chinese)
[35] ［35］陈小明,谭清泉,赵广涛.2002.海底玄武岩斜长石研究及其岩石学意义.岩石学报,18(4):482-488
[36] ［36］陈小明,赵连泽,陆建军,王德滋.1999.桐庐和相山两类酸性火山-侵入杂岩中长石的对比研究.岩石学报,15(2):279-285
[37] ［37］董传万,李武显,陈小明,徐夕生,周新民.1998.闽东南晚中生代岩浆混合作用:平潭火成杂岩的岩石学证据.自然科学进展,8(5):581-586
[38] ［38］董传万,徐夕生,陈小明,周新民.1997.福建平潭角闪辉长岩结晶过程的矿物学记录.矿物学报,17(3):285-290
[39] ［39］李武显,董传万,周新民.1999.平潭和漳州深成杂岩中斜长石捕虏晶与岩浆混合作用.岩石学报,15(2):286-290
[40] ［40］邱检生,沈渭洲,王德滋.2002.浙闽沿海晚中生代A型花岗岩.见:王德滋,周新民等著.中国东南部晚中生代花岗质火山-侵入杂岩成因于地壳演化.北京:科学出版社,160-173
[41] ［41］周珣若,王方正.1987.岩石物理化学.河南:河南科学技术出版社,191-197
[42] ［42］朱永峰.1995.埃提哲尔花岗斑岩及其暗色微粒包体中的斜长石斑晶.北京大学学报(自然科学版),31(3):366-372
-
计量
- 文章访问数: 10646
- PDF下载数: 9246
- 施引文献: 0
下载: