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地质通报  2005 

韧性剪切变形对岩石地球化学行为的制约――以北阿尔金巴什考供韧性剪切带为例

, PP. 252-257

Keywords: 韧性剪切变形体积亏损成分变异巴什考供北阿尔金

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Abstract:

韧性剪切变形对岩石地球化学行为的制约一直是地质学家们探讨的课题。本文以构成北阿尔金红柳沟――拉配泉俯冲碰撞杂岩带与北阿尔金地块边界的巴什考供斜向逆冲型韧性剪切带为例,通过对韧性剪切带内花岗岩变形前后不同变形强度构造岩的地球化学组成进行对比,确定等比线斜率,探讨韧性变形对岩石体积和成分变异的影响。计算结果表明,在糜棱岩化过程中,糜棱岩化花岗岩体积亏损21%,花岗质糜棱岩体积亏损31%。质量平衡计算结果和等比线图表明,韧;陛剪切作用导致SiO2,流失量最大,A12O3、K2O及Ba、Rb、Sr等都有不同程度的丢失,显示出较强的活动性,MnO、P2O5、Sc位于等比线上或附近,表现出相对的稳定性。岩石中活动组分的变异是流体渗滤作用引起的,不活动组分的变异是体.积亏损造成的。

References

[1]  刘德良 杨晓勇.郯庐断裂带南段桴槎山韧性剪切带糜棱岩的变形条件和组分迁移系[J].岩石学报,1996,12(4):573-588,.
[2]  郭召杰 张志诚.阿尔金山北缘蛇绿岩带的Sm―Nd等时线年龄及其大地构造意义[J].科学通报,1998,43(18):1981-1984,.
[3]  许志琴 杨经绥.阿尔金断裂两侧构造单元的对比及岩石圈剪切机制[J].地质学报,1999,73(3):193-205,.
[4]  周建波 胡克.稀土元素在韧性剪切带体积亏损研究中的应用:以胶南造山带构造岩为例[J].地质论评,1999,45(3):241-246,.
[5]  钟增球 游振东.剪切带的成分变异及体积亏损:以河台剪切带为例[J].科学通报,1995,40(10):913-916,.
[6]  唐红峰 刘丛强.区域变质作用中岩石的质量迁移和元素活动:以庐山双桥山群变泥?…[J].地质论评,2000,46(3):245-254,.
[7]  陈德潜 陈刚.实用稀土元素地球化学[M].北京:冶金工业出版社,1990.171-172.
[8]  王中刚.稀土元素地球化学[M].北京:科学出版社,1988.92-98.
[9]  刘良 车自成.阿尔金高压变质岩带的特征及其构造意义[J].岩石学报,1999,15(1):57-64,.
[10]  刘良 车自成.阿尔金高压变质岩带的特征及其构造意义[J].岩石学报,1999,15(1):57-64,.
[11]  Beach A. The interrelations of fluid transport: Deformation, geochemistry and heat flow in early Proterozoic shear zones in the lesisian complea[J]. Philodophical Transaction of the Royal Society of London, 1996, 280: 569-604.
[12]  Condie K C, Sinha A K. Rare earth and other trace element mobility during mylonitization: a comparison of the Brevasrd and Hope Valley shear zones in the Appalachian Mountains, USA[J]. J. Metamorphic Geol., 1996, 14:213-226.
[13]  Ague J J. Compositional variations in metamorphosed sediments of the Litrleton Formation, New Hampshire [J]. Am. J. Sci.,1997, 297:440-449.
[14]  O\\'Hara K. Fluid flow and volume loss during mylonitization: an origin for phyllonite in an overthrust setting, North Carohna,USA[J]. Tectophysics, 1988, 156:21-36.
[15]  O\\'Hara K,Blackbum W H. Volume-loss model for trace-element enrichments in mylonites[J]. Geology, 1989, 17: 524-527.
[16]  Grant J A. The isocon diagram- A simple solution to Gresens\\' eqation for metasomatic alteration [J]. Economic Geology, 1986, 81 : 1976-1982.
[17]  Gresem R L. Composition-volume relationships of metasomatism[J]. Chem. Geol., 1967, 2:47-55.
[18]  Glaazner A F. Volume loss, fluid flow and state of strains in extensional mylonites from the central Mojave Desert, California [J]. J. struct. Geol., 1991, 13(5): 587-591.
[19]  Sobel E R., Arnaud N. A possible middle Paleozoic suture in the Altyn Tagh, NW China[J]. Tectonics, 1999,18(1):64-74.
[20]  吴峻 兰朝利 等.阿尔金红柳沟蛇绿混杂岩中MORB与OIB组合的地球化学证据[J].岩石矿物学杂志,2002,21(1):24-30,.
[21]  刘良.[D].中国科学院地质研究所,1999.1―17.
[22]  杨经绥 吴才来 等.阿尔金山米兰红柳沟的席状岩墙群:海底扩张的重要证据[J].地质通报,2002,21(2):69-74,.
[23]  陈宣华 G.Gehrels 王小凤 杨风 陈正乐.阿尔金山北缘花岗岩的形成时代及其构造环境探讨[J].矿物岩石地球化学通报,2003,22(4):294-298,.
[24]  .区域地质调查报告(1:20万巴什考供幅)[R].新疆维吾尔自治区地质局,1981.18-152.
[25]  Muecke G K. Rare earth element geochemistry of regional metamorphic rocks[J]. Physics and chemistry of the Earth, 1979,2:4554.
[26]  Johannes W, Holtz F, Moner P. REE distribution in some layered migmatites: constraints on their petrogenesis[J]. Lithos, 1995, 35: 139-152.
[27]  Klammer D. Mass change during extreme acide-sulphate hydrothermal alteration of a Tertiary latite, Styria, Austria[J]. Chem. Geol., 41:33-48.
[28]  Baalen M R.. Titanium mobility in metamorphic systerrrs: a review[J]. Chem. Geol., 1993, 110:233-249.
[29]  刘良 车自成.阿尔金高压变质岩带的特征及其构造意义[J].岩石学报,1999,15(1):57-64,.
[30]  何国琦 李茂松 刘德权.新疆古生代地壳演化及成矿[M].乌鲁木齐:新疆人民出版社,1994.43-47.
[31]  Liu Liang, Che Zicheng, Wang Yan, et al. The evidences of Sm-Nd isochron age for the early Paleozoic ophiolite in Mangya area, Altun mountain [J]. Chinese Science Bulletin, 1998,43(9) :754-756.

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