2017年3期

胡正祥,陈超,毛新武,杨青雄,邓乾忠,孔令耀,杨成.扬子北缘青白口系土门岩组岛弧火山-碎屑岩的定义及意义[J].地层学杂志, 2017, 41(3): 304-317.

HU Zheng-xiang,CHEN Chao,MAO Xin-wu,YANG Qing-xiong,DENG Qian-zhong,KONG Ling-yao,YANG Cheng.THE QINGBAIKOUAN TUMEN FORMATION-COMPLEX ISLAND ARC VOLCANIC-CLASTIC ROCKS ON THE NORTHERN MARGIN OF YANGTZE BLOCK AND ITS SIGNIFICANCE[J].Journal of Stratigraphy, 2017, 41(3): 304-317.

扬子北缘青白口系土门岩组岛弧火山-碎屑岩的定义及意义
胡正祥 1 陈超 1 毛新武 1 杨青雄 1 邓乾忠 1 孔令耀 1 杨成 1
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+ 作者地址

1湖北省地质调查院 湖北武汉 430034

在《湖北省区域地质志》修编过程中,将原花山群北部沿着土门-小阜-园潭一带分布的一套火山岩夹少量碎屑岩组合解体出来,新定义为土门岩组,代表青白口纪扬子北缘的一套岛弧火山-碎屑岩建造,标准剖面在李家塆-土门公路边。土门岩组以基性玄武岩为主,中性安山岩和酸性英安岩、流纹岩次之,局部夹有少量的火山碎屑岩和粉砂岩,受后期构造活动影响产生一定程度的变形和轻微的变质作用。土门岩组火山岩SiO 2的含量为50.47%~81.57%,由基性、中性、酸性三个端元组成,大部分表现为钙碱性系列的特点,少量表现为拉斑玄武岩系列特点,轻稀土元素(LREE)富集,具有"右倾"的稀土配分模式以及一定程度的负Eu异常,富集大离子亲石元素(LILE) RB、Ba、K、Pb,亏损高场强元素(HFSE) Nb、Ta、Ti等,这些特征与典型的岛弧火山岩基本相符。分别对土门和园潭酸性火山岩进行LA-ICP-MS锆石U-Pb测年,获得土门英安岩成岩年龄为841 Ma,园潭酸性火山岩的成岩年龄为(827.9±5.9) Ma(MSWD=0.57),二者同属青白口纪,都代表土门岩组火山岩的形成时间。土门岩组岛弧火山岩可能是扬子北缘晋宁期洋陆俯冲消减的产物,结合已经获得的三里岗岛弧中酸性侵入岩858~876 Ma和基性辉长岩871 Ma年代学资料,说明扬子北缘大洪山地区至少在876~828 Ma发生了一定规模的洋-陆俯冲消减作用。
语种: 中文   
基金: 湖北省地质局科技项目(KJ2015-1)、中国地质调查局项目(12120113012800、DD20160030-0...
丁孝忠, 高林志, 刘燕学, 韩坤英, 庞健峰. 2013. 江南古陆新元古代地层格架及年代学制约. 地层学杂志, 37(4):626-627. 董云鹏, 张国伟, 赖绍聪, 周鼎武, 朱炳泉. 1999. 随州花山蛇绿构造混杂岩的厘定及其大地构造意义. 中国科学(D辑), 29(3):222-231. 董云鹏, 张国伟, 柳小明, 赖绍聪. 1998. 鄂北大洪山地区"花山群"的解体. 中国区域地质, 17(4):371-376. 董云鹏, 张国伟, 赵 霞, 姚安平, 柳小明. 2003. 鄂北大洪山岩浆带地球化学及其构造意义——南秦岭勉略洋盆东延及其俯冲的新证据. 中国科学(D辑), 33(12):1143-1153. 高林志, 陈 峻, 丁孝忠, 刘耀荣, 张传恒, 张 恒, 刘燕学, 庞维华, 张玉海. 2011. 湘东北岳阳地区冷家溪群和板溪群凝灰岩SHRIMP锆石U-Pb年龄——对武陵运动的制约. 地质通报, 30(7):1001-1008. 高林志, 丁孝忠, 张传恒, 陆松年, 刘燕学, 庞维华. 2012. 江南古陆变质基底地层年代的修正和武陵运动构造意义. 资源调查与环境, 33(02):71-76. 胡正祥, 陈 超, 毛新武, 邓乾忠, 杨金香, 李琳静, 孔令耀. 2015a. 鄂北大洪山晋宁期岛弧火山岩和增生杂岩的厘定及地质意义. 资源环境与工程, 29(6):1-12. 胡正祥, 毛新武, 田望学, 李雄伟. 2015b. 扬子陆块北缘大洪山地区发现晋宁期造山带. 中国地质调查, 2(2):33-39. 湖北省地质局区域地质测量队. 1982. 1/20万《宜城幅(H-49-V)》、《随县幅(H-49-M)》区域地质调查报告. 武汉:湖北省地质局. 湖北省地质矿产局鄂东北地质大队一分队. 1986. 1/5万《客店坡东半幅(H49-22-D)》、《古城畈幅(H49-23-C)》、《三阳店幅(H49-35-A)》区域地质调查报告. 武汉:湖北省地质调查院. 湖北省地质调查院. 2003. 1/25万《随州市幅(H49 C001004)》区域地质调查报告. 武汉:湖北省地质调查院. 湖北省地质调查院. 2017. 湖北省区域地质志(修订版). 北京:地质出版社(待出版). 蒋幸福. 2014. 扬子克拉通黄陵背斜庙湾蛇绿杂岩成因及大地构造意义. 武汉:中国地质大学出版社. 李怀坤, 田 辉, 周红英, 张 健, 刘 欢, 耿建珍, 叶丽娟, 相振群, 瞿乐生. 2016. 扬子克拉通北缘大洪山地区打鼓石群与神农架地区神农架群的对比:锆石SHRIMP U-Pb年龄及Hf同位素证据. 地学前缘, 23(1):1-16. 廖明芳, 谢应波, 李琳静, 杨金香, 毛新武, 邓乾忠, 孔令耀, 李启文, 陈 超. 2016. 湖北省大洪山地区三里岗岩体成因及时代探讨. 资源环境与工程, 30(2):143-150. 陆松年. 2001. 从罗迪尼亚到冈瓦纳超大陆——对新元古代超大陆研究几个问题的思考. 地学前缘, 8(4):441-448. 陆松年, 李怀坤, 陈志宏, 于海峰, 金 巍, 郭坤一. 2004. 新元古时期中国古大陆与罗迪尼亚超大陆的关系. 地学前缘, 11(2):515-523. 彭松柏, 李昌年, Kusky T M, 王 璐, 张先进, 蒋幸福, 熊承仁. 2010. 鄂西黄陵背斜南部元古宙庙湾蛇绿岩的发现及其构造意义. 地质通报, 29(1):8-20. 桑隆康, 马昌前. 2012. 岩石学(第二版). 北京:地质出版社. 1-620. 石玉若, 张宗清, 刘敦一, 唐索寒, 王进辉. 2003. 湖北省随州花山蛇绿混杂岩Sm-Nd、Rb-Sr同位素年代研究. 地质论评, 49(4):367-373. 石玉若, 张宗清, 刘敦一, 唐索寒, 王进辉, 陈 文, 张思红, 刘新宇. 2005a. 湖北省随州三里岗地区二长花岗岩Rb-Sr、 40Ar/ 39Ar同位素年龄. 地球学报, 26(1):17-20. 石玉若, 张宗清, 刘敦一, 唐索寒, 王进辉, 刘 涛. 2005b. 湖北省随州杨家棚地区辉长岩Rb-Sr同位素年龄. 地球学报, 26(6):521-524. 王鸿祯, 莫宣学. 1996. 中国地质构造述要. 中国地质, (8):4-9. 吴元保, 郑永飞. 2004. 锆石成因矿物学研究及其对 U-Pb 年龄解释的制约. 科学通报, 49(16):1589-1604. 许靖华, 孙 枢, 李继亮. 1987. 是华南造山带而不是华南地台. 中国科学(B辑), (10):1107-1115. 翟明国. 2013. 中国主要古陆与联合大陆的形成——综述与展望. 中国科学(地球科学辑), 43(10):1583-1606. 张国伟, 郭安林, 王岳军, 李三忠, 董云鹏, 刘少峰, 何登发, 程顺有, 鲁如魁, 姚安平. 2013. 中国华南大陆构造与问题. 中国科学(地球科学辑), 43(10):1553-1582. 张国伟, 董云鹏, 赖绍聪, 郭安林, 孟庆任, 刘少峰, 程顺有, 姚安平, 张宗清, 裴先治, 李三忠. 2003. 秦岭-大别造山带南缘勉略构造带与勉略缝合带. 中国科学(D辑), 33(12):1121-1135. 周传明. 2016. 扬子区新元古代前震旦纪地层对比. 地层学杂志, 40(2):120-135. Deng Q, Wang J, Wang Z J, Wang X C, Qiu Y S, Yang Q X, Du Q D, Cui X Z & Zhou X L. 2013. Continental flood basalts of the Huashan Group, northern margin of the Yangtze block:implications for the breakup of Rodinia. International Geology Review, 55(15):1865-1884. Dong Y, Liu X, Santosh M, Chen Q, Zhang X, Li W, He D & Zhang G. 2012. Neoproterozoic accretionary tectonics along the northwestern margin of the Yangtze Block, China:constraints from zircon U-Pb geochronology and geochemistry. Precambrian Research, 196-197:247-274. Dong Y P, Zhang G W, Zhao X, Yao A & Liu X. 2006. Geochemistry of the subduction-related magmatic rocks in the Dahong Mountains, northern Hubei Province. Science in China (Ser. D Earth Sciences), 47(4):366-377. Ernst W G. 2010. Subduction-zone metamorphism, calcalkaline magmatism, and convergent-margin crustal evolution. Gondwana Research, 18(1):8-16. Greentree M R, Li Z, Li X & Wu H. 2006. Late Mesoproterozoic to earliest Neoproterozoic basin record of the Sibao Orogenesis in western South China and relationship to the assembly of Rodinia. Precambrian Research, 151(1-2):79-100. Hastie A R, Kerr A C, Pearce J A & Mitchell S F. 2007. Classification of altered volcanic island arc rocks using immobile trace elements:development of the Th-Co discrimination diagram. Journal of Petrology, 48(12):2341-2357. Hoffman P F. 1991. Did the breakout of Laurentia turn Gondwanaland Inside-Out?. Science, 252(5011):1409-1412. Jiang X F, Peng S B, Kusky T M, Wang L, Wang J & Deng H. 2012. Geological features and deformational ages of the basal thrust belt of the miaowan ophiolite in the southern Huangling Anticline and its tectonic implications. Journal of Earth Science, 23(5):705-718. Jiang X F, Peng S B, Polat A, Kusky T, Wang L, Wu T Y, Lin M S & Han Q S. 2016. Geochemistry and geochronology of mylonitic metasedimentary rocks associated with the Proterozoic Miaowan Ophiolite Complex, Yangtze Craton, China:implications for geodynamic events. Precambrian Research, 279:37-56. Lai S C & Zhong J H. 1999. Geochemical features and its tectonic significance of the meta-basalt in Zhoujiawan area, Mianlue suture zone, Qinling-Dabie Mountains, Hubei Province. Scientia Geologica Sinica, 2(8):127-136. Li L M, Lin S F, Xing G F, Davis D W, Davis W J, Xiao W J & Yin C Q. 2013. Geochronology and geochemistry of volcanic rocks from the Shaojiwa Formation and Xingzi Group, Lushan area, SE China:implications for Neoproterozoic back-arc basin in the Yangtze Block. Precambrian Research, 238:1-17. Li L M, Lin S F, Xing G F, Davis D W, Jiang Y, Davise W & Zhang Y J. 2016. Ca. 830 Ma back-arc type volcanic rocks in the eastern part of the Jiangnan Orogen:implications for the Neoproterozoic tectonic evolution of South China Block. Precambrian Research, 275:209-224. Li X H, Li Z X, Sinclair J A, Li W X & Carter G. 2006. Revisiting the "Yanbian Terrane":implications for Neoproterozoic tectonic evolution of the western Yangtze Block, South China. Precambrian Research, 151(1-2):14-30. Li Z X, Li X H, Kinny P D, Wang J, Zhang S & Zhou H. 2003. Geochronology of Neoproterozoic syn-rift magmatism in the Yangtze Craton, South China and correlations with other continents:evidence for a mantle superplume that broke up Rodinia. Precambrian Research, 122(1-4):85-109. Li Z X, Bogdanova S V, Collins A S, Davidson A, De Waele B, Ernst R E, Fitzsimons I C W, Fuck R A, Gladkochub D P, Jacobs J, Karlstrom K E, Lu S, Natapov L M, Pease V, Pisarevsky S A, Thrane K & Vernikovsky V. 2008. Assembly, configuration, and break-up history of Rodinia:a synthesis. Precambrian Research, 160(1-2):179-210. Li Z X, Wartho J A, Occhipinti S, Zhang C L, Li X H, Wang J & Bao C M. 2007. Early history of the eastern Sibao Orogen (South China) during the assembly of Rodinia:new mica 40Ar/ 39Ar dating and SHRIMP U-Pb detrital zircon provenance constraints. Precambrian Research, 159(1-2):79-94. Liu Y S, Hu Z C, Gao S, Günther D, Xu J, Gao C G & Chen H H. 2008. In situ analysis of major and trace elements of anhydrous minerals by LA-ICP-MS without applying an internal standard. Chemical Geology, 257(1-2):34-43. Ludwig K R. 2003. User's manual for Isoplot 3.00:a geochronological toolkit for Microsoft Excel. Berkeley:Berkeley Geochronology Center. Mcmenamin M A & Mcmenamin D L S. 1990. The emergence of animals:the Cambrian breakthrough. New York:Columbia University Press. Peng S B, Kusky T M, Jiang X F, Wang L, Wang J P & Deng H. 2012. Geology, geochemistry, and geochronology of the Miaowan Ophiolite, Yangtze Craton:implications for South China's amalgamation history with the Rodinian Supercontinent. Gondwana Research, 21(2-3):577-594. Shi Y R, Liu D Y, Zhang Z Q, Miao L C, Zhang F Q & Xue H M. 2007. SHRIMP Zircon U-Pb Dating of Gabbro and Granite from the Huashan Ophiolite, Qinling Orogenic Belt, China:Neoproterozoic Suture on the northern margin of the Yangtze Craton. Acta Geologica Sinica, 81(2):239-243. Sun S S & Mcdonough W F. 1989. Chemical and isotopic systematics of oceanic basalts:implications for mantle composition and processes. Geological Society, London, Special Publications, 42(1):313-345. Xu Y, Yang K G, Polat A & Yang Z N. 2016. The~860 Ma mafic dikes and granitoids from the northern margin of the Yangtze Block, China:a record of oceanic subduction in the early Neoproterozoic. Precambrian Research, 275:310-331. Yan Q, Hanson A D, Wang Z, Druschke P A, Yan Z, Wang T, Liu D, Song B, Jian P, Zhou H et al. 2004. Neoproterozoic subduction and rifting on the northern margin of the Yangtze Plate, China:implications for Rodinia reconstruction. International Geology Review, 46(9):817-832. Zhao G & Cawood P A. 2012. Precambrian geology of China. Precambrian Research, 222-223:13-54.

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