甘肃北山大山头南花岗闪长岩SHRIMP锆石U-Pb定年及其地质意义
SHRIMP Zircon U-Pb Age of the Dashantounan Granodioritein from Beishan Mountains in Gansu Province and its Signification
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摘要: 采用SHRIMP锆石U-Pb定年方法，首次获得大山头南出露的片麻状花岗闪长岩的206Pb/208Pb加权平均年龄为（386±6）Ma（MSWD=1.06），代表该岩体的成岩年龄，即大山头南花岗闪长岩岩体形成于中泥盆世。于此同时，首次获得了花岗闪长岩中部分继承锆石的年龄为（885±20）Ma（MSWD=1.18），该年龄是新元古代构造热事件的反映。该岩体成岩年龄介于其北侧的大山头超镁铁岩体（397±4）Ma和大山头南超镁铁岩体（374±3）Ma之间，结合研究区地质构造背景及前人研究成果，认为中晚泥盆世期间不仅有中酸性岩浆侵位，同时沿大断裂带也有部分镁铁-超镁铁岩侵位，中酸性岩体与镁铁-超镁铁岩体可能具有类似的地质背景，即它们均形成于后造山或同造山晚期阶段。
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关键词:
- 大山头南花岗闪长岩 /
- 锆石SHRIMP U-Pb定年 /
- 甘肃北山
Abstract: Using the SHRIMP zircon U-Pb dating methods, the diagenesisage of the Dashantounangranodiorite has been obtained for the first time. The obtained 206Pb/208Pb weighted average age is (386±6)Ma (MSWD=1.06), standing for the Dashantounan granodiorite was formed in middle Devonian. At the same time, the inherited zircon age has been obtained for the first time, and the yielded age is (885±20)Ma (MSWD=1.18), whichserves as a reflection of the Neoproterozoic tectonic-thermal event. The diagenetic age between the age of Dashantourock mass (397±4)Ma and the ones of Dashantounan rock mass (374±3)Ma. After analyzing the previous research achievements, it's believed that themagmatic intrusionin the Middle-lateDevoniannot only includeintermediate-acidic magmas,but also include basic-ultrabasicmagma in the studying area. Theintermediate-acidic and basic-ultrabasicmagma might be formed in the same geological background, that is, theymight beformed in a post-orogenic extensional setting or a late-stage of syn-orogenic setting.-
Key words:
- Dashantounan granodiorite /
- zircon SHRIMP U-P bdating /
- Beishan in Gansu
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安国堡.甘肃北山拾金坡花岗岩特征及其与金成矿的关系[J].甘肃地质,2007,16(3):19-25.
AN Guobao. Characteristics of Shijinpo granites and their relationship to gold metallogenesis in the Beishanmoutains, Northwestern Gansu[J]. Gansu Geology, 2007, 16(3):19-25.
丁嘉鑫,韩春明,肖文交,等.北山造山带花牛山岛弧东段钨矿床成矿时代和成矿动力学过程[J].岩石学报,2015,31(2):594-616.
DING Jiaxin, HAN Chunming, XIAO Wenjiao, et al. Geochemistry and U-Pb geochronology of tungsten deposit of Huaniushan island arc in the BeishanOrogenic Belt, and its geodynamic background[J]. Acta Petrologica Sinica, 2015, 31(2):594-616.
龚全胜,刘明强,李海林,等.甘肃北山造山带类型及基本特征[J].西北地质,2002,35(3):28-34.
GONG Quansheng, LIU Mingqiang, LI Hailin, et al. The type and basic characteristics of Beishanorogenic belt, Gansu[J]. Northwestern Geology, 2002, 35(3):28-34.
龚全胜,刘明强,梁明宏,等.北山造山带大地构造相及构造演化[J].西北地质,2003,36(1):11-17.
GONG Quansheng, LIU Mingqiang, LIANG Minghong, et al. The tectonic facies and tectonic evolution of Beishanorogenic belt, Gansu[J]. Northwestern Geology, 2003, 36(1):11-17.
何世平,周会武,任秉琛,等.甘肃内蒙古北山地区古生代地壳演化[J].西北地质,2005,38(3):6-15.
HE Shiping, ZHOU Huiwu, REN Bingchen, et al. Crustal evolution of Palaeozoic in Beishan area, Gansu and Inner Mongolia, China[J]. Northwestern Geology, 2005, 38(3):6-15.
姜洪颖,贺振宇,宗克清,等.北山造山带南缘北山杂岩的锆石U-Pb定年和Hf同位素研究[J].岩石学报,2013,29(11):3949-3967.
JIANG Hongying, HE Zhenyu, ZONG Keqing, et al. Zircon U-Pb dating and Hf isotopic studies on the Beishan complex in the southern Beishanorogenic belt[J]. Acta Petrologica Sinica, 2013, 29(11):3949-3967.
颉炜,宋谢炎,邓宇峰,等.甘肃黑山铜镍硫化物含矿岩体的地质特征及橄榄石成因探讨[J].岩石学报,2013,29(10):3487-3502.
XIE Wei, SONG Xieyan, DENG Yufeng, et al. Geology and olivine geochemistry of the Heishan Ni-Cu-(PGE) sulfide deposit, Gansu, NW China[J]. Acta Petrologica Sinica, 2013, 29(10):3487-3502.
李舢,王涛,童英,等.北山辉铜山泥盆纪钾长花岗岩锆石U-Pb年龄、成因及构造意义[J].岩石学报,2011,27(10):3055-3070.
LI Shan, WANG Tao, TONG Ying, et al. Zircon U-Pb age, origin and its tectonic significances of Huitongshan Devonian K-feldspar granites from Beishan orogeny, NW China[J]. Acta Petrologica Sinica, 2011, 27(10):3055-3070.
李舢,王涛,童英,等.北山柳园地区双峰山早泥盆世A型花岗岩的确定及构造演化意义[J].岩石矿物学杂志,2009,28(5):407-422.
LI Shan, WANG Tao, TONG Ying, et al. Identification of the early Devonian Shuangfengshan A-type granites in Liuyuan area of Beishan and its implications to tectonic evolution[J]. Acta Petrologica et Mineralogica, 2009, 28(5):407-422.
毛启贵,肖文交,韩春明,等.北山柳园地区中志留世埃达克质花岗岩类及其地质意义[J].岩石学报,2010,26(2):584-596.
MAO Qigui, XIAO Wenjiao, HAN Chunming, et al. Discovery of middle Silurian adakite granite and its tectonic significance in Liuyuan area, BeishanMoutains, NW China[J]. Acta Petrologica Sinica, 2010,26(2):584-596.
梅华林,李惠民,陆松年,等.甘肃柳园地区花岗质岩石时代及成因[J].岩石矿物学杂志,1999,18(1):14-17.
MEI Hualin, LI Huimin, LU Songnian, et al. The age and origin of the Liuyuangranitoid, northwestern Gansu[J]. Acta Petrologica et Mineralogica, 1999, 18(1):14-17.
梅华林,于海峰,陆松年,等.甘肃敦煌太古宙英云闪长岩:单颗粒锆石U-Pb年龄和Nd同位素[J].前寒武纪研究进展,1998,21(2):41-45.
MEI Hualin, YU Haifeng, LU Songnian, et al. Archeantonalite in the Dunhuang, Gansu province:Age from the U-Pb single zircon and Ndisotope[J].Progress in Precambrian Research, 1998, 21(2):41-45.
秦克章.方同辉,王书来,等.东天山古生代板块构造分区、演化与成矿地质背景研究[J].新疆地质,2002,20(4):302-308.
QIN Kezhang, FANG Tonghui, WANG Shulai, et al. Plate tectonics division, evolution and metallogenic settings in eastern Tianshanmoutains, NW-China[J].Xinjiang Geology, 2002, 20(4):302-308.
宋彪,张玉海,万渝生,等.锆石SHRIMP样品制作、年龄、测定及有关现象讨论[J].地质评论,2002,48(增刊):26-30.
SONG Biao, ZHANG Yuhai, WAN Yusheng, et al. Mount making and procedure of the SHRIMP dating[J]. Geological Review, 2002,48(suppl.):26-30.
田永志.甘肃北山拾金坡岩体特征及含金性研究[J].西安地质学院学报,1993,15(4):62-69.
TIAN Yongzhi. Study on the feature and auriferous potentiality of Shijinpo rock body in BeishanMoutain, Gansu province[J]. Journal of Xi'an College of Geology, 1993, 15(4):62-69.
王静永.甘肃北山南带峡东地区敦煌岩群中花岗质正片麻岩的确认及其意义[J].甘肃地质,2008,17(3):22-26.
WANG Jingyong. Identification of granitic orthogneiss of Dunhuang rock group in Xiadong area of Gansu province and its significance[J]. Gansu Geology, 2008, 17(3):22-26.
王磊,杨建国,王小红,等.甘肃北山大山头南基性-超基性杂岩体SHRIMP锆石U-Pb定年及其地质意义[J].岩石矿物学杂志,2015a,34(5):697-709.
WANG Lei, YANG Jianguo, WANG Xiaohong, et al. Zircon SHRIMP U-Pb age and its signification of Dashantounan basic-ultrabasic intrusion complex in Beishan mountains, Gansu province[J]. Acta Petrologica et Mineralogica, 2015a, 34(5):697-709.
王磊,杨建国,王小红,等. 甘肃北山营毛沱地区花岗岩类LA-ICP-MS锆石U-Pb定年及地质意义[J].矿物岩石地球化学通报,2015b,34(3):583-591.
WANG Lei,YANG JianGuo, WANG XiaoHong, et al. LA-ICP-MS zircon U-Pb dating of Yingmaotuo granitic rocks and its geological implications[J]. Bulletin of Mineralogy, Petrology and Geochemistry, 2015b, 34(3):583-591.
王立社,杨建国,王育习,等.甘肃北山营毛沱地区公婆泉群中玄武岩同位素定年及其地质意义[J].地球学报,2009,30(3):363-368.
WANG Lishe, YANG Jianguo, WANG Yuxi, et al. Isotopic dating of basalt from Gongpoquan group in Yingmaotuo area of the Beishan Mountain, Gansu province, and its geological significance[J]. Acta Geoscientica Sinica, 2009,30(3):363-368.
吴元保,郑永飞.锆石成因矿物学研究及其对U-Pb年龄解释的制约[J].科学通报,2004,49(16):1589-1604.
WU Yuanbao, ZHENG Yongfei. Genesis of zircon and its constraints on interpretation of U-Pbage[J]. Chinese Science Bulletin, 2004, 49(16):1589-1604.
谢燮,杨建国,王小红,等.甘肃北山红柳沟基性-超基性岩体岩石成因及成矿条件[J].现代地质,2015a,29(6):1259-1270.
XIE Xie, YANG Jianguo, WANG Xiaohong, et al. The petrogenesis and mineralization of the Hongliugou mafic-ultramafic rock in Beishan, Gansu province[J]. Geoscience, 2015a, 29(6):1259-1270.
闫海卿,赵焕强,丁瑞颖,等.甘肃北山大山头基性杂岩体SHRIMP锆石U-Pb年龄及其地质意义[J].西北地质,2012,45(4):216-228.
YANG Haiqing, ZHAO Huanqiang, DING Ruiying, et al. Zircon SHRIMP U-Pb dating of the Dashantou basic complex and its geological significance in Beishan area, Gansu province[J]. Northwestern Geology, 2012, 45(4):216-228.
杨建国,王磊,王小红,等.甘肃北山地区黑山铜镍矿化基性-超基性杂岩体SHRIMP锆石U-Pb定年及其地质意义[J].地质通报,2012,31(2/3):448-454.
YANG Jianguo, WANG Lei, WANG Xiaohong, et al. Zircon SHRIMP U-Pb dating of Heishan mafic-ultramafic complex in the Beishan area of Gansu province and its geological significance[J].Geological Bulletin of China, 2012,31(2/3):448-454.
杨建国,王磊,谢燮,等.甘肃北山怪石山铜镍矿化基性-超基性杂岩体锆石SHRIMP U-Pb同位素定年及其意义[J].大地构造与成矿学,2016,40(1):98-108.
YANG Jianguo, WANG Lei, XIE Xie, et al. SHRIMP zircon U-Pb age and its signification of Guaishishan mafic-ultramafic complex in Beishan Mountains, Gansu province[J]. Geotectonica et Metallogenia, 2016, 40(1):98-108.
杨经绥,吴才来,陈松永,等.甘肃北山地区榴辉岩的变质年龄:来自锆石的U-Pb同位素定年证据[J].中国地质,2006,33(2):317-325.
YANG Jingsui, WU Cailai, CHEN Songnian, et al. Neoproterozoiceclogite sonthern margin of the Central Asian Orogenic Belt[J]. Lithos, 2012, 144 -145.
ZUO G C, ZHANG S L, HE G Q, et al. Plate tectonic characteri即晴屩c孳儠湤u彲汩普g笠t卨履造居幡卲罬杹嘠坐卡敬入卯乺良屩屣瘠坩瑮匠孂牥彩即全坡赮愠乮ear 坴赨遥戠Sino-Mongolian border region, China[J]. Tectonophysics, 1991, 188 (3-4):385-392.stry of Neoproterozoic granite in Liuyuan area of southern Beishanorogenic belt and its geological significance[J]. Geological Bulletin of China,2013, 32(2/3):307-317.
于海峰,陆松年,梅华林,等.中国西部新元古代榴辉岩-花岗岩带和深层次韧性剪切带特征及其大陆再造意义[J].岩石学报,1999,15(4):532-538.
YU Haifeng, LU Songnian, MEI Hualin, et al.Characteristics of Neoproterozoiceclogite-granite zones and deep level ductile shear zone in western China and theirsignificance for continental reconstruction[J]. Acta Petrologica Sinica, 1999, 15(4):532-538.
赵泽辉,郭召杰,王毅.甘肃北山柳园地区花岗岩类的年代学、地球化学特征及构造意义[J].岩石学报,2007,23(8):1847-1860.
ZHAO Zehui, GUO Zhaojie, WANG Yi. Geochronology, geochemical characteristics and tectonic implications of the granitoids from Liuyuan area, Beishan, Gansu province, northwest China[J]. Acta Petrologica Sinica, 2007,23(8):1847-1860.
左国朝,何国琦,李红诚,等.北山板块构造及成矿规律[M].北京:北京大学出版社,1990.
ZUO Guochao, HE Guoqi, LI Hongcheng, et al. Plate tectonics and ore formation in the Beishan Region[M]. Beijing:Peking University Press, 1990.
左国朝,刘春燕,白万成,等.北山泥盆纪碰撞造山火山-磨拉石地质构造及地球化学特征[J].甘肃地质学报,1995,4(1):35-43.
ZUO Guochao, LIU Chunyan, BAI Wancheng, et al. Volcano-Molasse geological structure and geochemical signature in Devonian period collision orogenic in Beishan, Gansu-Inmongolia[J]. Acta Geologica Gansu, 1995, 4(1):35-43.
AO S J, XIAO W J, HAN C M, et al. Cambrian to Early Silurian ophiolite and accretionary processes in the Beishan collage, NW China:Implications for thearchitecture of the southern Altaids[J]. Geological Magazine, 2012, 149(4):606-625.
AO S J, XIAO W J, HAN C M, et al. Geochronology and geochemistry of Early Permian mafic-ultramafic complexes in the Beishan area, Xinjiang, NW China:Implications for late Paleozoic tectonic evolution of the southern Altaids[J]. Gondwana Research, 2010, 18:466-478.
CROFU F, HANCHAR J M, HOSKIN P W O. Atlas of zircon textures[J]. Reviews in Mineralogy and Geochemistry, 2003, 53:469-495.
HANCHAR J M, MILLER C F. Zircon zonation patterns as revealed by cathodeluminescence and backscattered electron images:Implications for interpretation of complex crustal histories[J]. Chemical Geology, 1993, 110:1-13.
HANCHAR J M, RUDNICK R L. Revealing hidden structures:the application of cathodeluminescence and back-scattered electron imaging to dating zircons from lower crustal xenoliths[J]. Lithos, 1995, 36/3-4:289-303.
LIU X C, CHEN B L, JAHN B, et al. Early paleozoiceclogites from Beishan (NW China) and their bearing on the tectonic evolution of the southern central Asian orogenic belt[J]. Journal of Asian Earth Sciences, 2010, 42 (4):715-731.
RUBATTO D, GEBAUER D. Use of cathodoluminescence for U-Pb zircon dating by IOM Microprobe:Some examples from the western Alps[J]. Cathodoluminescence in Geoscience, Springer-Verlag Berlin Heidelberg, Germany, 2000, 373-400.
STEIGER R H, JDGER E. Subcommission on geochronology:Convention on the use of decay constants in geo-and cos-mochronology[J]. Earth Planet Scilett, 1977, 36(3):359-362.
SU B X, QIN K Z, SAKYI P A, et al. U-Pb ages and Hf-O isotopes of zircons from Late Paleozoic mafic-ultramafic units in the southern Central Asian Orogenic Belt:Tentonic implications and evidence for an Early-Permian mantle plume[J]. Gondwana Research, 2011a, 20(2-3):516-531.
WILLIAMS I S. U-Th-Pb geochronology by ion microprobe. In:McKibben MA, ShanksⅢ WC, Ridley WI (eds.). Applications of microanalytical techniques to understanding mineralizing processes[J]. Reviews in Economic Geology, 1998, 7:1-35.
XIAO W j, MAO Q G, WINDLEY B F, et al. Paleozoic multiple accretionary and collisional processes of the Beishanorogenic collage[J]. American Journal of Science, 2010, 310(10):1553-1594.
XIEW, SONG X Y, DENG Y F, et al. Geochemistry and petrogenetic implications of a Late Devonian mafic ultramafic intrusion at th
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