黄陵地区基性岩墙群的地球化学特征及其地质意义

曾雯; 钟增球; 周汉文; 江麟生; 周忠友; 陈铁龙

黄陵地区基性岩墙群的地球化学特征及其地质意义

1.
中国地质大学地球科学学院, 湖北武汉 430074
2.
湖北省区域地质调查研究院, 湖北宜昌 443000

基金项目:

国家自然科学基金重点项目 40032010B

详细信息

作者简介:
曾雯(1981-),女,2003级硕士研究生,原地质学理科基地班010991班学生,研究方向为岩石学.E-mail: rodinia@tom.com

中图分类号: P595;P588
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- 被引次数: 0
出版历程
- 收稿日期: 2003-09-09
- 刊出日期: 2004-01-25

Geochemistry of Mafic Dykes in Huangling Area and Its Tectonic Implications

1.
Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China 443000, China

摘要

摘要: 黄陵地区的基性岩墙群主要由辉绿岩脉和辉绿玢岩脉组成, 走向主要为NEE向, 少量为NNW向.元素地球化学显示其为形成于板内拉张环境下的亚碱性玄武岩特征, 其很低的Mg# 指示为岩浆高度演化的产物, 同时Nb、Ta的亏损和Pb的富集表明其受到地壳物质的混染, 这说明可能是在拉张环境下由先前被俯冲带流体交代的地幔源重熔的结果.根据前人的年代学研究结果, 它形成于770Ma左右, 可能跟Rodinia超级古陆裂解构造背景相关.
- 基性岩墙群 /
- 黄陵花岗岩 /
- 地球化学 /
- Rodinia
Abstract: According to the geological characteristics, the mafic dykes in Huangling area mainly include diabase and diabase-prophyrite, with nearly NEE trend and NNW trend. Geochemical characteristics of the dykes indicate that they are sub-alkaline basalt formed in WPB. The low Mg^#(Mg^#=100×MgO/(MgO+0.9×TFe₂O₃))shows the magma for the dykes was highly evolutionary. The depletion in Nb and Ta, and the enrichment in Pb indicate that the mafic dykes are contaminated by crustal material. All these suggest that it may be the product of remelted materials from mantle source, which had been metasomatismed by the fluid in subduction zone, under the extensional circumstance. Based on the previous geochronological researches, it is concluded that the mafic dyke swarms intruded at about 770 Ma and may be related to the breakup of the Rodinia supercontinent.
- mafic dyke swarm /
- Huangling granite /
- geochemistry /
- Rodinia

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图 1 黄陵地区地质略图(马大铨等, 1997)

Ar₃.基底片麻岩; Pt₁.表壳岩; ∑₂.橄榄岩; γ₂.辉长岩; δ₂.闪长岩; γ₂¹.圈椅垧花岗岩; γ₂².黄陵花岗岩; Z+Pz.震旦系及古生界; 1.地质界线; 2.不整合; 3.断层; 4.基性岩墙

Fig. 1. Geological sketch map of Huangling area

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图 2 黄陵地区基性岩墙群的TAS岩石分类图解

R.流纹岩; T.粗面岩; O₁.玄武安山岩; O₂.安山岩; O₃.英安岩; Pc.苦橄玄武岩; S₁.粗面玄武岩; S₂.玄武质安山岩; S₃.粗面安山岩; B.玄武岩; U₁.碱玄岩或碧玄岩; U₂.响岩质玄武岩; U₃.碱玄质响岩; Ph.响岩; F.副长石岩

Fig. 2. TAS diagram for rock classification of mafic dyke swarms in Huangling area

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图 3 黄陵地区基性岩墙群的Harker图解(李昌年, 1992)

Fig. 3. Harker-type oxides vs. MgO for mafic dyke swarms in Huangling area

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图 4 黄陵地区基性岩墙群微量元素与MgO的相关图解

Fig. 4. Selected trace element abundances vs. MgO variation diagram

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图 5 黄陵地区基性岩墙群的球粒陨石标准化稀土分布模式

Fig. 5. Chondrite-normalized REE patterns for mafic dyke swarms in Huangling area

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图 6 黄陵地区基性岩墙群的不相容元素蛛网图

Fig. 6. Primitive mantle-normalized incompatible trace element spidergrams for mafic dyke swarms in Huangling area

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图 7 黄陵地区两类基性岩墙形成的构造环境w(Zr)/w(Y)-w(Zr)相关图(Rollinson, 1993)

WPB.板内玄武岩; MORB.洋中脊玄武岩; IAT.岛弧拉斑玄武岩

Fig. 7. Tectonic environments discriminant w(Zr)/w(Y)-w(Zr)diagram for mafic dykes in Huangling area

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图 8 黄陵地区基性岩墙群的地幔类型判别图(Rollinson, 1993; 邵济安等, 2001)

N.亏损地幔; T.过渡型地幔; P.富集地幔

Fig. 8. Mantle discriminant diagram for mafic dyke swarms in Huangling area

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图 9 黄陵地区基性岩墙群形成的构造环境判别图(Rollinson, 1993)

Fig. 9. Tectonic environments discriminant diagram for mafic dyke swarms in Huangling area

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表 1 黄陵地区基性岩墙群的主量元素组成

Table 1. Major element data for mafic dyke swarms in Huangling area w_B/%

表 2 黄陵地区基性岩墙群的微量元素组成

Table 2. Trace element data for mafic dyke swarms in Huangling area w_B/10^-6

参考文献(48)

Bureau of Geology and Mineral Resources of Hubei Province, 1994. Introduction to geological map— Maopinghe region. Map Press of Hydrological Engineering Geological Team of Hubei Province, China(in Chinese with English abstract).
Bureau of Geology and Mineral Resources of Hubei Province, 1987. Introduction to geological map— Xingshandong, Shuiyuesi region. Map Press of Hydrological Engineering Geological Team of Hubei Province, China(in Chinese with English abstract).
Bureau of Geology and Mineral Resources of Hubei Province, 1990. Regional geology of Hubei Province. Geological Publishing House, Beijing(in Chinese with English abstract).
Ding, Z.J., Yao, S.Z., Zhou, Z.G., et al., 2003. Diversity of trace element compositions of volcanic in different slabs of Bikou Group: Implications for tectonics. Earth Science— Journal ofChina University of Geosciences, 28(2): 167- 172(in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-DQKX200302009.htm
Ge, X.Y., Li, X.H., Zhou, H.W., 2003. Geochronologic, geochemistry and Sr-Nd isotopes of the Late Cretaceous mafic dyke swarms in southern Hainan island. Geochimica, 32 (1): 12- 20(in Chinese with English abstract). doi: 10.1007%2Fs11631-007-0143-2
Li, C.N., 1992. Trace element petrology of igneous rocks. China University of Geosciences Press, Wuhan(in Chinese).
Li, J.H., He, W.Y., Qian, X.L., 1997. Genetic mechanism and tectonic setting of Proterozoic mafic dyke swarm: Its implication for paleoplate reconstruction. Geological Journal ofChina Universities, 3(3): 272- 281(in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-GXDX703.003.htm
Li, X.H., Hu, R.Z., Rao, B., 1997. Geochronology and geochemistry of Cretaceous mafic dykes from northern Guangdong, SE China. Geochimica, 26(2): 14- 28(in Chinese with English abstract). https://en.cnki.com.cn/Article_en/CJFDTOTAL-DQHX702.003.htm
Li, Z.C., Wang, G.H., Zhang, Z.C., 2002. Isotopic age spectrum of the Huangling granitic batholith, western Hubei. Geology and Mineral Resources ofSouth China, 3: 19- 28 (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-HNKC200203003.htm
Li, Z.X., Li, X.H., Detal, K.P., 1999. The breakup of Rodinia: Did it start with a mantle plume beneath South China. Earth and Planetary Science Letters, 173: 171- 181. doi: 10.1016/S0012-821X(99)00240-X
Ling, W.L., Cheng, J.P., 2000. Significance and reconstruction models of Rodinia supercontinent and Jinningian tectonics in South China. Geological Science and Technology Information, 19(3): 7- 11(in Chinese with English abstract).
Ling, W.L., Gao, S., Zheng, H.F., et al., 1998. An Sm-Nd isotopic dating study of the Archean Kongling complex in the Huangling area of the Yangtze craton. Chinese Science Bulletin, 43(14): 1187- 1191(in Chinese with English abstract). doi: 10.1007/BF02883222
Lu, F.X., Sang, L.K., Wu, J.H., et al., 2002. Petrology. Geological Publishing House, Beijing, (in Chinese with English abstract).
Ma, D. Q., Du, S. H., Xiao, Z. F., 2002. The origin of Huangling granite batholith. Acta Petrologica et Mineralogica, 21(2): 151- 161(in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-YSKW200202008.htm
Ma, D. Q., Li, Z. C., Xiao, Z. F., 1997. The constitute, geochronology and geologic evolution of the Kongling complex, western Hubei. Acta Geoscientia Sinica, 18(3): 233- 241(in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-DQXB703.000.htm
Ma, F., Mu, Z.G., Li, J.H., 2000. Geochemistry and petrogenesis of Precambrian mafic dyke swarms. Geology Geochemistry, 28(4): 58- 64(in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-DZDQ200004010.htm
McDonough, W.F., Sun, S.S., 1995. The composition of the Earth. Chemical Geology, 120: 223- 253. doi: 10.1016/0009-2541(94)00140-4
Qiu, J.X., 1985. Petrology of magmatic rock. Geological Publishing House, Beijing(in Chinese with English abstract).
Rollinson, H., 1993. Using geochemical data: Evaluation, presentation, interpretation. Longman Singapore Publishers (Pte)Ltd., Singapore.
Shao, J.A., Li, X.H., Zhang, L.Q., et al., 2001. Geochemical condition for genetic mechanism of the Mesozoic bimodal dyke swarms in Nankou-Guyaju. Geochimica, 30(6): 517 - 524(in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-DQHX200106002.htm
Sun, S.S., McDonough, W.F., 1989. Chemical and isotopic systematics of oceanic basalts: Implications for mantle composition and processes. In: Saunders, A.D., Norry, M.J., eds., Magmatism in the ocean basins. Geological Society Special Publication, Blackwell, 42: 313- 345.
Wang, J., Liu, B.J., Pan, G.T., 2001. Neoproterozoic rifting history of South China significance to Rodinia breakup. Journal ofMineralogy and Petrology, 21(3): 135- 145(in Chinese with English abstract). http://www.onacademic.com/detail/journal_1000035132331910_a92b.html
Xu, X.Y., Xia, Z.C., Xia, L.Q., 2001. Proterozoic intraplate volcanic rocksin South Qinling Mountains and their tectonics implications. Acta Petrologica et Mineralogica, 20(3): 255- 262(in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-YSKW200103006.htm
Yan, D.P., Zhou, M.F., Song, H.L., et al., 2002. Where was South China located in the reconstruction of Rodinia? Earth Science Frontiers, 9(4): 249- 256(in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-DXQY200204005.htm
Zhang, B.R., 2001. Magmatic activities from plume-source in the Qinling orogenic belt and its dynamic significance. Earth Science Frontiers, 8(3): 57- 66(in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-DXQY200103008.htm
Zhang, C.L., Zhou, D.W., Liu, Y.Y., 1999. Geochemistry of basic dykes in Wudangshan block and their tectonic significance. Geochimica, 28(2): 126- 135(in Chinese with English abstract) https://www.researchgate.net/publication/248133185_Geochemistry_of_basic_dykes_in_Wudang_block_and_its_tectonic_significance
湖北省地质矿产局, 1994. 地质图说明书——茅坪河幅. 湖北: 湖北省水文工程地质大队测绘地图制印厂.
湖北省地质矿产局, 1987. 地质图说明书——兴山东半幅、水月寺幅. 湖北: 湖北省水文工程地质大队测绘地图制印厂.
湖北省地质矿产局, 1990. 湖北省区域地质志. 北京: 地质出版社.
丁振举, 姚书振, 周宗桂, 等, 2003. 碧口群不同岩片火山岩微量元素组成差异与古构造意义. 地球科学——中国地质大学学报, 28(2): 167- 172. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX200302009.htm
葛小月, 李献华, 周汉文, 2003. 琼南晚白垩世基性岩墙群的年代学、元素地球化学和Sr- Nd同位素研究. 地球化学, 32(1): 12- 20. https://www.cnki.com.cn/Article/CJFDTOTAL-DQHX200301001.htm
李昌年, 1992. 火成岩微量元素岩石学. 武汉: 中国地质大学出版社.
李江海, 何文渊, 钱祥麟, 1997. 元古代基性岩墙群的成因机制、构造背景及其古板块再造意义. 高校地质学报, 3 (3): 272- 281. https://www.cnki.com.cn/Article/CJFDTOTAL-GXDX703.003.htm
李献华, 胡瑞忠, 饶冰, 1997. 粤北白垩纪基性岩脉的年代学和地球化学. 地球化学, 26(2): 14- 28. doi: 10.3321/j.issn:0379-1726.1997.02.004
李志昌, 王桂华, 张自超, 2002. 鄂西黄陵花岗岩基同位素年龄谱. 华南地质与矿产, 3: 19- 28. doi: 10.3969/j.issn.1007-3701.2002.03.004
凌文黎, 程建萍, 2000. Rodinia研究意义、重建方案与华南晋宁期构造运动. 地质科技情报, 19(3): 7- 11. doi: 10.3969/j.issn.1000-7849.2000.03.002
凌文黎, 高山, 郑海飞, 等, 1998. 扬子克拉通黄陵地区崆岭杂岩Sm- Nb同位素地质年代学研究. 科学通报, l24(1): 86- 89. doi: 10.3321/j.issn:0023-074X.1998.01.022
路凤香, 桑隆康, 邬金华, 等, 2002. 岩石学. 北京: 地质出版社.
马大铨, 杜绍华, 肖志发, 2002. 黄陵花岗岩基的成因. 岩石矿物学杂志, 21(2): 151- 161. doi: 10.3969/j.issn.1000-6524.2002.02.009
马大铨, 李志昌, 肖志发, 1997. 鄂西崆岭杂岩的组成、时代及地质演化. 地球学报, 18(3): 233- 241. https://www.cnki.com.cn/Article/CJFDTOTAL-DQXB703.001.htm
马芳, 穆治国, 李江海, 2000. 前寒武纪基性岩墙群的地球化学特征与岩石成因讨论. 地质地球化学, 28(4): 58- 64. doi: 10.3969/j.issn.1672-9250.2000.04.011
邱家骧, 1985. 岩浆岩岩石学. 北京: 地质出版社.
邵济安, 李献华, 张履桥, 等, 2001. 南口—古崖居中生代双峰式岩墙群形成机制的地球化学制约. 地球化学, 30(6): 517- 524. doi: 10.3321/j.issn:0379-1726.2001.06.003
王剑, 刘宝珺, 潘桂棠, 2001. 华南新元古代裂谷盆地演化——Rodinia超大陆解体的前奏. 矿物岩石, 21(3): 135 - 145. doi: 10.3969/j.issn.1001-6872.2001.03.021
徐学义, 夏祖春, 夏林圻, 2001. 南秦岭元古宙板内火山作用特征及构造意义. 岩石矿物学杂志, 20(3): 255- 262. doi: 10.3969/j.issn.1000-6524.2001.03.007
颜丹平, 周美夫, 宋鸿林, 等, 2002. 华南在Rodinia古陆中位置的讨论——扬子地块西缘变质岩浆杂岩证据及其与Seychelles地块的对比. 地学前缘, 9(4): 249- 256. doi: 10.3321/j.issn:1005-2321.2002.04.004
张本仁, 2001. 秦岭地幔柱源岩浆活动及其动力学意义. 地学前缘, 8(3): 57- 66. doi: 10.3321/j.issn:1005-2321.2001.03.007
张成立, 周鼎武, 刘颖宇, 1999. 武当山地块基性岩墙群地球化学研究及其大地构造意义. 地球化学, 28(2): 126- 135. https://www.cnki.com.cn/Article/CJFDTOTAL-DQHX902.002.htm