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地质论评 2009

南秦岭金池院与张家坝岩体磁组构特征和构造意义

郭秀峰,张国伟,梁文天,程斌

Keywords: 磁组构,岩体,侵位,南秦岭,勉略（勉县―略阳）缝合带,陕西。

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Abstract:

秦岭造山带勉略(勉县―略阳）缝合带北侧的金池院和张家坝岩体的磁组构特征显示，其平均磁化率Km低于1000μSI，校正磁化率各向异性度PJ小于1？1，为流动磁组构特征。磁化率椭球体形态参数T反映两岩体总体分别以挤压和拉伸应变为主，而又明显观察到两岩体边部近平行于岩体边界、内部相对混乱的磁面理分布特征。这些磁组构特征反映了岩体形成时勉略缝合带闭合的NNE―SSW向挤压作用仍然存在，但相对主造山期已较弱，其磁组构主要形成于岩体侵位时的侧向挤压作用。本文认为，金池院与张家坝岩体形成于印支期勉略缝合带闭合之后的后碰撞环境，是后造山过程由挤压向伸展体制转化时期的产物。

References

[1]	林文姣杨文强.大别山南麓典型岩体磁组构学研究的地质意义[J].地质科技情报,2006,25(4):52-54.
[2]	潘永信朱日祥.磁组构研究现状[J].地球物理学进展,:.
[3]	高山张本仁金振民.秦岭-大别造山带下地壳拆沉作用[J].中国科学:B辑,1999,29(6):532-541.
[4]	郭武林.岩石磁化率各向异性及其地质应用[J].国外地质勘探技术,1984,3:9-17.
[5]	李三忠张国伟.勉县地区勉略带内麻粒岩的发现及构造意义[J].岩石学报,:.
[6]	李曙光孙卫东张国伟陈家义杨永成.南秦岭勉略构造带黑沟峡变质火山岩的年代学和地球化学――古生代洋盆及其闭合时代的证据[J].中国科学:D辑,1996,26(3):223-230.
[7]	梁文天张国伟鲁如魁裴先治袁四化姚安平.西秦岭北缘武山-鸳鸯镇构造带磁组构特征[J].地学前缘,2008,15(4):298-306.
[8]	秦江锋赖绍聪李永飞.南秦岭勉县-略阳缝合带印支期光头山埃达克质花岗岩的成因及其地质意义[J].地质通报,2007,26(4):466-471.
[9]	万天丰 Teyss.,C.山东玲珑花岗质岩体侵位机制[J].中国科学:D辑,:.
[10]	阎桂林.岩石磁化率各向异性在地学中的运用[M].武汉:中国地质大学出版社,1996.8-89.
[11]	晏云翔张成立.南秦岭张家坝岩体和新院岩体地球化学特征及其形成环境[J].高校地质学报,2005,11(3):425-433.
[12]	杨坤光刘强刘育燕马昌前徐亚军杨奎锋.大别山双河同构造花岗岩体显微构造与磁组构研究[J].中国科学：D辑,2003,33(11):1050～1056.
[13]	杨树锋陈汉林陈芙蓉竺国强张伯友.磁化率各向异性与花岗岩形成的构造背景――以广东两类不同成因类型的花岗岩为例[J].地球物理学报,1996,39(增):158-165.
[14]	余钦范郭友钊.安徽凤凰山岩体岩浆侵位过程的磁性研究[J].物探与化探,:.
[15]	余钦范郑敏.岩石磁组构分析及其地学中的应用[M].北京:地质出版社,1992.58-85.
[16]	张成立张国伟晏云翔王煜.南秦岭勉略带北光头山花岗岩体群的成因及其构造意义[J].岩石学报,2005,21(3):711-720.
[17]	张达李东旭.铜陵凤凰山岩体侵位构造变形特征[J].地球学报,1999,20(3):239-245.
[18]	张国伟张本仁等.秦岭造山带与大陆动力学[M].北京:科学出版社,2001.855.
[19]	周伟新万天丰.崔召花岗岩岩体的磁组构特征及其构造侵位意义[J].岩石学报,:.
[20]	Benn K, Ham N M, Pignotta G S. 1998. Enplacement and deformation of granites during transpression: magnetic fabrics of the Archean Sparrow pluton, Slave Province, Canada. Journal of Structural Geology, 20(9-10) : 1247-1259.
[21]	Boummane M H, Olivier P. 2007. The Oulad Variscan granitic pluton (Jebilets Massif, Southwestern Morccan Meseta): A forcibly emplaced laccolithic intrusion characterized by its magnetic and magmatic fabrics. Journal of African Earth Sciences, 47: 49-61.
[22]	Cowan J. 1999. Magnetic fabric constraints on the initial geometry of the Sudbury Igneous Complex: a folded sheet or a basin shaped igneous body? Tectonophysics, 307:135-162.
[23]	Graham J W. 1954. Magnetic susceptibility anisotropy, an unexploited petrofabric element. Bull. Geol. Soc. Am., 65:1257-1258.
[24]	Hrouda F. 1982. Magnetic anisotropy of rocks and its application in geology and geophysics. Surveys in Geophysics, 5: 37-82.
[25]	Jelinek V. 1981. Characterization of magnetic fabric of rocks. Tectonophysics, 79: 63-67.
[26]	Mamtani M A, Greiling R O. 2005. Granite emplacement and its relation with regional deformation in the Aravalli Mountain Belt (India)-inferences from magnetic fabric. Journal of Structural Geology, 27: 2008-2029.
[27]	Neves S P, Arajo A M B, Correia P B, Mariano G. 2003. Magnetic fabrics in the Cabanas Granite (NE Brazil) : interplay between emplacement and regional fabrics in a dextral transpressive regime. Journal of Structural Geology, 25: 441-453.
[28]	Reid A J, Wilson C J L, Liu S. 2005. Structural evidence for the Permo-Triassie tectonic evolution of the Yidun Arc, eastern Tibetan Plateau. Journal of Structral Geology, 27: 119-137.
[29]	Sen K, Mamtani M A. 2006. Magnetic fabric shape preferred orientation and regional strain in granitic rocks. Journal of Structural Geology, 28: 1870-1882.
[30]	Sun W, Li S, Chen Y, Li Y. 2002. Timing of synorogenie granotoids in the south Qinling, central China: constraints on the evolution of the Qinling-Dabie orogenic belt. Journal of Geology, 110: 457-468.
[31]	Talbot J F, Martelet G, Courrioux G. 2004. Emplacement in an extensional setting of the Mount Lozere-Borne granitic complex (SE France) inferred from comprehensive AMS, structural and gravity studies. Journal of structure geology, 26: 11-28.
[32]	Tarling D H, Hrouda F. 1993. The Magnetic Anisotropy of Rocks. London:Chapman & Hall: 95-127.

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