对湖北大洪山地区一套紫红色砂-砾岩系沉积年代的再认识——碎屑锆石U-Pb年龄及其地质意义
Recognition of the sedimentation age of a series of purple-red colored glutenite sedimentary rocks in Dahong Mountain area, northern Hubei Province: Detrital zircon U-Pb geochronology and its geological significance
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摘要: 湖北大洪山地区花山群六房咀组之上不整合覆盖了一套紫红色砂-砾岩。这套岩石的沉积时代存在争议，一种观点认为是南华纪早期；另一种观点认为是晚侏罗世。利用LA-ICP-MS分析技术，对这套碎屑沉积岩进行了碎屑锆石U-Pb测年，获得有效年龄数据125组，年龄值变化范围较大（3223～771Ma），主要集中于新太古代末-古元古代早期（约2500Ma）、古元古代（约2000Ma）和新元古代（约800Ma）3个时间段。对比鄂东南地区和三峡地区莲沱组岩石学特征和碎屑锆石年龄分布特征，认为其具有相似的物源，这套岩系沉积时代应该为南华纪早期而非晚侏罗世。综合分析扬子地块的前寒武纪年龄，认为扬子地块可能存在大量未岀露的新太古代末-古元古代早期（约2500Ma）基底，约2500Ma的岩石应该是扬子地块深部基底的重要组成部分。扬子地块存在广泛的古元古代（约2000Ma）岩浆活动，这期岩浆活动可能是Columbia超大陆聚合在扬子地块的响应。新元古代（约800Ma）扬子地块北缘存在Rodinia超大陆裂解同期裂谷，裂谷内基性岩可能为大洪山地区南华纪地层中基性岩砾石的物源。Abstract: The sedimentary age of a series of purple-red colored glutenite sedimentary rocks in Dahong Mountain area of northern Hubei Province is controversial. Some researchers hold that it is of late Jurassic period, while others believe it is of early Nanhua peri-od. In this paper, the authors studied detrital zircon geochronology of this layer and obtained 125 groups of effective age data which range from 3223Ma to 771Ma, and the age data are focused on three periods:late Neo-Archean to early Paleoproterozoic (~2500Ma), Paleoproterozoic (~2000Ma), and Neoproterozoic (~800Ma). The authors compared the petrological features and the detri-tal zircon age distribution of Liantuo Formation in southeastern Hubei, Three Gorges area, and the purple-red colored glutenite. It is considered that the Liantuo Formation in southeastern Hubei, Three Gorges area and the purple-red colored glutenite have similar sources. The sedimentary age of this series of purple-red colored glutenite sedimentary rocks in Dahong Mountain area of northern Hubei Province is early Nanhua period rather than the late Jurassic period. Based on a comprehensive analysis of the Precambrian age of Yangtze block, the authors hold that there may exist lots of Neo-Archean to early Paleoproterozoic concealed rocks, and the rocks around 2500Ma may be an important part of the basement of Yangtze block. There existed a magmatic activity around 2000Ma in Yangtze block, and it may be connect to the aggregate event of Columbia supercontinent. There is a Neoproterozoic rift on the northern margin of Yangtze block, which might be connected to the breakup of Rodinia supercontinent, and the basic rock was probably the source of the mafic gravel in the purple-red colored glutenite sedimentary rocks.
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Key words:
- Liantuo Formation /
- LA-ICP-MS zircon U-Pb ages /
- Yangtze block /
- Dahong Mountain
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[1] 陈公信, 金经炜. 湖北省岩石地层[M]. 武汉:中国地质大学出版社, 1996:57-58.
[2] 李锦轶. 湖北大洪山地区原"莲沱组"时代质疑[J]. 地质通报, 2002, Z2:579-583.
[3] 马国干, 李华芹, 张自超. 华南地区震旦纪时限范围的研究[J]. 中国地质科学院宜昌地质矿产研究所所刊, 1984:29.
[4] 胡世玲, 刘鸿允, 劳秋元. 震旦系地质年代学新研究[J]. 地质科学, 1991, 4:325-336.
[5] 佘振兵. 中上扬子上元古界-中生界碎屑锆石年代学研究[D]. 中国地质大学(武汉)博士学位论文, 2007.
[6] Liu Y, Gao S, Hu Z, et al. Continental and Oceanic Crust Recy-cling-induced Melt-Peridotite Interactions in the Trans-North China Orogen:U-Pb Dating, Hf Isotopes and Trace Elements in Zircons from Mantle Xenoliths[J]. Journal of Petrology, 2010, 51(1/2):537-571.
[7] Liu Y, Hu Z, Gao C, et al. In situ analysis of major and trace ele-ments of anhydrous minerals by LA-ICP-MS without applying an internal standard[J]. Chemical Geology, 2008, 257(1):34-43.
[8] Anderson T. Correction of common lead in U-Pb analyses that do not report204 Pb[J]. Chemical Geology, 2002, 192(1):59-79.
[9] Ludwig K R. User's manual for Isoplot 3.00:a geochronological toolkit for Microsoft Excel[M]. Berkeley:Berkeley Geochronologi-cal Center, 2003:1-71.
[10] Drewery S, Cliff R A, Leeder M R. Provenance of Carboniferous sandstones from U-Pb dating of detrital zircons[J]. Nature, 1987, 325(6099):50-53.
[11] Geslin J K, Link P K, Fanning C M. High-precision provenance determination using detrital-zircon ages and petrography of Qua-ternary sands on the eastern Snake River Plain, Idaho[J]. Geology, 1999, 27(4):295-298.
[12] Morton A C, H. Processes controlling the composition of heavy mineral assemblages in sandstones[J]. Sedimentary Geology, 1999, 124(1):3-29.
[13] 谢士稳, 高山, 柳小明, 等. 扬子克拉通南华纪碎屑锆石U-Pb年龄、Hf同位素对华南新元古代岩浆事件的指示[J]. 地球科学(中国地质大学学报), 2009, 1:117-126.
[14] 佘振兵. 中上扬子上元古界-中生界碎屑锆石年代学研究[D]. 中国地质大学(武汉)博士学位论文, 2007.
[15] 杜利林, 郭敬辉, 耿元生, 等. 扬子西南缘盐边群时代及构造环境:来自碎屑沉积岩的约束[J]. 岩石学报, 2013, 2:641-672.
[16] 李怀坤, 张传林, 姚春彦, 等. 扬子西缘中元古代沉积地层锆石U-Pb年龄及Hf同位素组成[J]. 中国科学:地球科学, 2013, 8:1287-1298.
[17] 王鹏鸣, 于津海, 孙涛, 等. 湘东新元古代沉积岩的地球化学和碎屑锆石年代学特征及其构造意义[J]. 岩石学报, 2012, 12:3841-3857.
[18] 王孝磊, 于津海, 舒徐洁, 等. 赣中周潭群副变质岩碎屑锆石UPb年代学[J]. 岩石学报, 2013, 3:801-811.
[19] 赵芝, 王登红, 李沛刚, 等. 黔北大竹园组碎屑锆石年代学及成矿指示意义[J]. 岩矿测试, 2013, 1:166-173.
[20] Wang X, Zhou J, Griffin W L, et al. Detrital zircon geochronology of Precambrian basement sequences in the Jiangnan orogen:Dating the assembly of the Yangtze and Cathaysia Blocks[J]. Precambrian Research, 2007, 159(1/2):117-131.
[21] Sun W, Zhou M, Gao J, et al. Detrital zircon U-Pb geochronolog-ical and Lu-Hf isotopic constraints on the Precambrian magmatic and crustal evolution of the western Yangtze Block, SW China[J]. Precambrian Research, 2009, 172(1):99-126.
[22] Wang Y, Zhang F, Fan W, et al. Tectonic setting of the South Chi-na Block in the early Paleozoic:Resolving intracontinental and ocean closure models from detrital zircon U-Pb geochronology[J]. Tectonics, 2010, 29(6):6016-6020.
[23] Zhu W, Zhong H, Li X, et al. The early Jurassic mafic-ultramafic intrusion and A-type granite from northeastern Guangdong, SE China:Age, origin, and tectonic significance[J]. Lithos, 2010, 119(3):313-329.
[24] Li H, Jia D, Wu L, et al. Detrital zircon provenance of the Lower Yangtze foreland basin deposits:constraints on the evolution of the early Palaeozoic Wuyi-Yunkai orogenic belt in South China[J]. Geological Magazine, 2013, 150(6):916-959.
[25] 涂荫玖, 杨晓勇, 郑永飞, 等. 皖东南黄片麻岩的锆石U-Pb年龄[J]. 岩石学报, 2001,17(1):157-160.
[26] 吴元保, 陈道公, 夏群科, 等. 北大别黄土岭麻粒岩锆石U-Pb离子探针定年[J]. 岩石学报, 2002, 3:378-382.
[27] 柳小明, 高山, 第五春荣, 等. 扬子克拉通前寒武纪地壳演化——来自碎屑锆石U-Pb年龄和Hf同位素的证据[C]//2006年全国岩石学与地球动力学研讨会, 2006.
[28] 于津海, O'Reilly Y S, 王丽娟, 等. 华夏地块古老物质的发现和前寒武纪地壳的形成[J]. 科学通报, 2007, 52(1):11-18.
[29] Wan Y, Liu D, Xu M, et al. SHRIMP U-Pb zircon geochronolo-gy and geochemistry of metavolcanic and metasedimentary rocks in Northwestern Fujian, Cathaysia block, China:Tectonic implica-tions and the need to redefine lithostratigraphic units[J]. Gondwana Research, 2007, 12(1):166-183.
[30] Zheng Y, Zhao Z, Wu Y, et al. Zircon U-Pb age, Hf and O iso-tope constraints on protolith origin of ultrahigh-pressure eclogite and gneiss in the Dabie orogen[J]. Chemical Geology, 2006, 231(1/2):135-158.
[31] 彭敏. 扬子板块古元古代岩浆事件年龄及其地质意义[D]. 中国地质大学(武汉)硕士学位论文, 2010.
[32] 郑永飞. 新元古代岩浆活动与全球变化[J]. 科学通报, 2003, 48(16):1705-1720.
[33] 郑永飞, 吴元保, 龚冰, 等. 扬子板块北缘新元古代岩浆活动与热液蚀变:锆石U-Pb年龄和O同位素证据[C]//同位素地质新进展:技术、方法、理论与应用学术研讨会, 2003.
[34] 郑永飞, 张少兵. 华南前寒武纪大陆地壳的形成和演化[J]. 科学通报, 2007, 52(1):1-10.
[35] Liu Y, Hu Z, Zong K, et al. Reappraisement and refinement of zir-con U-Pb isotope and trace element analyses by LA-ICP-MS[J]. Chinese Science Bulletin, 2010, 55(15):1535-1546.
[36] 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, 16:1589-1604.
[37] Zhang S, Zheng Y, Wu Y, et al. Zircon U-Pb age and Hf isotope evidence for 3.8Ga crustal remnant and episodic reworking of Ar-chean crust in South China[J]. Earth and Planetary Science Letters, 2006, 252(1):56-71.
[38] 秦正永, 雷世和. 武当群成岩年龄新资料兼讨论[J]. 中国区域地质, 1996, 2:176-185.
[39] 江来利, 吴维平, 刘贻灿, 等. 大别山南部宿松杂岩的U-Pb锆石和Ar-Ar角闪石年龄及其地质意义[J]. 岩石学报, 2003, 3:497-505.
[40] 王彦斌, 刘敦一, 曾普胜, 等. 安徽铜陵地区幔源岩浆底侵作用的时代——朝山辉石闪长岩锆石SHRIMP定年[J]. 地球学报, 2004, 4:423-427.
[41] 卓皆文, 江新胜, 王剑, 等. 华南扬子古大陆西缘新元古代康滇裂谷盆地的开启时间与充填样式[J]. 中国科学:地球科学, 2013, 12:1952-1963.
[42] Deng Q, Wang J, Wang Z, et al. Continental flood basalts of the Huashan Group, northern margin of the Yangtze block-implica-tions for the breakup of Rodinia[J]. International Geology Review, 2013, 55(15):1865-1884.
[43] 崔晓庄, 江新胜, 王剑, 等. 滇中新元古代裂谷盆地充填序列及演化模式:对Rodinia超大陆裂解的响应[J]. 沉积学报, 2014, 3:399-409.
[44] Wang J, Deng Q, Wang Z, et al. New evidences for sedimentary attributes and timing of the "Macaoyuan conglomerates" on the northern margin of the Yangtze block in southern China[J]. Pre-cambrian Research, 2013, 235:58-70.
[45] Li X, Li Z, Li W. Detrital zircon U-Pb age and Hf isotope con-strains on the generation and reworking of Precambrian continental crust in the Cathaysia Block, South China:A synthesis[J]. Gondwa-na Research, 2014, 25(3):1202-1215.
[46] Wang X, Li Z, Li X, et al. Geochemical and Hf-Nd isotope data of Nanhua rift sedimentary and volcaniclastic rocks indicate a Neo-proterozoic continental flood basalt provenance[J]. Lithos, 2011, 127(3/4):427-440.
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