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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:

第27卷

期数:

2005年第04期

页码:

33-37,57

栏目:

出版日期:

2005-11-15

文章信息/Info

Title:

Geochemical Features and Tectonic Setting of Pingdao Granite in Tianshui Region of Gansu Province

作者:

李锁成¹; 李永军²; 李金宝²; 刘志武²

1.甘肃省地质矿产勘查开发局,兰州730000;2.长安大学地球科学与国土资源学院,西安710054

Author(s):

LI Suo-cheng¹; LI Yong-jun²; LI Jin-bao²; LIU Zhi-wu²

1.Geological Survey of Gansu Province, Lanzhou 730000, China; 2.School of Earth Sciences and Resources Management, Chang’ an University, Xi’ an 710054, China

关键词:

花岗岩; 地球化学特征; 构造环境; 坪道岩体; 天水; 甘肃

Keywords:

granite;  geochemical features;  tectonic setting;  Pingdao granite;  Tianshui;  Gansu Province

分类号:

P596

DOI:

-

文献标志码:

A

摘要:

坪道岩体由早期到晚期可分出斜长花岗岩→花岗闪长岩→黑云二长花岗岩→含斑黑云二长花 岗岩→正长花岗岩共5期岩浆活动。岩体碱值为0.49～0.62,ANKC大于1,多见白云母,CIPW计算 中多见刚玉,属钙碱性铝过饱和型。随SiO2增加,TiO2,TeO,MgO,CaO,Na2O均逐渐缓慢减少,而 Fe2O3,K2O剧增。岩石化学显示其源岩为上地壳杂砂岩类、碎屑岩类。岩体相对富集轻稀土,δEu值 为0.35～0.7,铕亏损强烈。岩体贫Ba,Rb,Sr,Y,Cu,Zr,Ga,Ni,富Nb,Ta,Bi,Th,Cr,Sn,Mo,Hf,Sc, 异常富Hf,Sn,Sc。构造地球化学信息显示岩体是大陆裂谷型花岗岩。

Abstract:

Five successive stages of magmation in the Pingdao granite could be recognized, they are plagiogranite, granodior- ite, biotite adamellite,porphyaceous biotite adamellite and syeogranite. The granite, with NK/A= 0.49～ 0.62, ANKC> 1. 1, rich muscavite, and corundum when calculated by CIPW, belongs to the aluminium supersaturation and calc-alkali se- ries. The TiO2, FeO, MgO, CaO, and Na2O decrease increasingly but the Fe2O3and K2O increase strongly with the SiO2 increasing. Petrochemistry study indicates that the source rocks of the Pingdao granite are graywacke and fragmental rocks and they are rich the LREE, withδEu= 0.35～ 0.7 and intense Eu depletion. Meanwhile, they are poor in Ba, Rb, Sr, Y, Cu, Zr, Ga and Ni, but rich in Nb, Ta, Bi, Th, Cr, Sn, Mo, Hf and Sc, and especially rich in Hf, Sn and Sc. The infor- mation of the tectonic geochemistry displays that the Pingdao granite is a intraplate rift type.

参考文献/References:

[1] 张二朋 , 牛道韫 , 霍有光 , 等. 1 ∶100万秦岭 —大巴山 及邻区 地质图及说明书[M] . 北京 :地质出版社 , 1992.
[2] 张维吉 , 孟宽恂 , 胡建民, 等. 祁连 北秦岭造山带 结合部位构 造特征与造山过程[M] . 西安 :西北大学出版社 , 1994.
[3] 霍福臣 , 李永军. 西秦 岭造山带 的建造与 地质演化[M]. 西 安 :西北大学出版社 , 1996.
[4] Huo Fuchen , Li Yongjun. Geological evolution of the West Qinling orogeni c Belt[J] . Act a geologi cal Gansu , 1996(5):1 24.
[5] Li Yongju n , H uo Fuch en. Tect oni c-geneti c t ypes of th e int ru si ve rocks in the ci st ern part of West Qinlin g[J] . Acta geol ogi cal Gansu , 1996(5):1 , 47 66.
[6] 高秉章 , 洪大为 , 郑基俭 , 等. 花岗岩 类区 1 ∶5 万区域 地质 填图方法指南[M] . 武汉 :中国地质大学出版社 , 1991.
[7] De La Roche , H Leteeeier, J Grande Claude. A classi ficat ion of volcanic and plut oni c rock s using R1 R2 diagrams and major element analy ses-it s rel at ionships and cu rrent nomenclatu re [J] . Chem Geol , 1980 , 29 :183 210.
[8] Irvine, Baragar. A guide to the chemical classification of the common volcanic rocks[J] . Can , Journal Earth Sci, 1971, 8 :532 548.
[9] Collins W J . Natu re and origin of A ty pe g ranit es w ith pati cular ref erence to Southeast ern Au st rali a[J] . Cont rib Petro , 1982 , 80 :189 200.
[10] 肖庆辉 , 邓晋福 , 马 大全 , 等. 花 岗岩研 究与思 维方法[M]. 北京 :地质出版社 , 2002.
[11] 武汉地质学院. 地球化学[M] . 北京 :地质出版社 , 1979.
[12] 赵振华. 微量元素地球化学原理[M] . 北京 :科学出版社, 1997.
[13] 刘英俊 , 曹励 明. 元素地 球化学 导论[M] . 北京 :地质 出版 社 , 1987.
[14] 王中刚 , 于学元 , 赵振华. 稀土元 素地球化 学[M] . 北京 :科 学出版社 , 1989.
[15] P 亨德森. 稀土元素地球化学[M] . 北京 :地质出版社 , 1989.
[16] Barbarin B. A review of th e relations hips between g rani toid t ypes , their ori gins and th eir geody nami c en vi ronmen ts[J]. Lithos , 1999 , 46 :605 626.
[17] Pearce A J. T ran ce element discriminati on diag ram for th e t ect oni c int erp ret at ion of g ranit ic rocks[J]. Journal of pet rology , 1984 , 25(4):956 983.
[18] Alther R, H egner E , Langer C , et al. H ighpot assium , calcalkaline I-ty pe plut onism in the Eu ropean Variscides :northern Vosges Fran ce and northern Schwarzw ald Germany[J] . Lithos , 2000 , 50 :51 73.
[19] 李 永军 , 赵红夫 , 李 注苍 , 等. 岩浆 混合花岗岩微量 元素成因 图解尝试 ———以西秦岭温泉岩体为例[J] . 长安大 学学报 :地 球科学版 , 2003 , 25(3):7 11.
[20] 李永军, 李注苍, 丁仨平, 等. 西秦岭温泉花岗岩体岩石学特征 及岩浆混合标志[J] . 地球科学与环境学报 ,2004 ,26(3):7 12.

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备注/Memo

备注/Memo:

[收稿日期]2004-12-15
[基金项目]中国地质调查局地调项目(20001300010171)
[作者简介]李锁成(1957-),男,甘肃兰州人,高级工程师,从事构造地质学与矿床学研究。

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