西乌旗地区中、新生代岩浆岩特征及其构造环境
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摘要
本文通过对西乌旗地区中、新生代岩浆岩特征,特别是其地球化学特征的研究,揭示了该地区岩浆源主要为幔源和壳幔混合源;所处大地构造环境是大陆边缘近板内一侧或大陆边缘与板内过渡区,为较成熟的大陆边缘靠板内一侧构造环境;岩浆岩的总体特征反映从晚侏罗世的挤压向早白垩世的伸展的变化过程,以及岩浆岩和岩浆活动与该时期太平洋板块与西伯利亚板块之间构造运动的密切相关性,为探讨和研究内蒙古缝合带的构造演化、古亚洲洋与古太平洋构造域的叠加转换关系提供了重要依据。
According to the meso-cenozoic magmatic rock characteristic, specially its geochemistry characteristic in Inner Mongolian Xi Ujimqin Qi area, this article promulgated that mainly magma sources are mantle source or crust mantle mixed origin;its structure environment is in continental margin near board or in the continental margin and the board the transition region; magmatic rock characteristic explains the extrusion process in late jurassic and Extension process in the early cretaceous;as well as the magmatic rock and the magmatic activity have closely relevance with pacific plateand siberia plate's tectonic movement. Which has provided the important basis to discuss and studies Inner Mongolia suture zone、the transformation relations between paleo-asian oceanand paleo-pacific tectonic domains.
According to the meso-cenozoic magmatic rock characteristic, specially its geochemistry characteristic in Inner Mongolian Xi Ujimqin Qi area, this article promulgated that mainly magma sources are mantle source or crust mantle mixed origin;its structure environment is in continental margin near board or in the continental margin and the board the transition region; magmatic rock characteristic explains the extrusion process in late jurassic and Extension process in the early cretaceous;as well as the magmatic rock and the magmatic activity have closely relevance with pacific plateand siberia plate's tectonic movement. Which has provided the important basis to discuss and studies Inner Mongolia suture zone、the transformation relations between paleo-asian oceanand paleo-pacific tectonic domains.
引文
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[23] Chen B,Jahn B M,Wilde S,Xu B.Two contrasting Paleozoic magmatic belts in nor- thern Inner Mongolia,China[J].petrogenesis and tectonic implications Tectonophysics, 2000,(328):157-182.
[24] Green T H.Anatexis of mafic crust and high pressure crystallization of andesites. Andesites-Orogenic andesites and related rocks.Thorpe R S ed,John Wiley and Sons. 1982, 17:465-487.
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[31] Abe N, Arai S, Yurimoto H.Geochemical characteristics of the uppermost mantle be- neath the Japan island arcs:Implications for upper mantle evolution[J].Phys Earth Planet.1998,107:233-248.
[32] Wilson M.Igneous Petrology-A Global Tectonic Approach[J].The Academic Division of Unwin Hyman Ltd.1989.
[33]赵振华,王强,熊小林,等.俯冲带复杂的壳幔相互作用[J].矿物岩石地球化学通报, 2004,23(4):277-284.
[34]李春昱,王荃,张之孟,等.中国板块构造的轮廓[J].地球学报,1980,001-002.
[35]徐备,陈斌.内蒙古北部华北板块与西伯利亚板块之间中古生代造山带的结构和演化[J].中国科学(D辑),1997,27(3):227-232.
[36]池际尚.中国东部新生代玄武岩及上地幔研究(附金伯利岩)[M].武汉:中国地质大学出版社,1988.
[2]邵济安.中朝板块北缘中段地壳演化[M].北京:北京大学出版社.1991.
[3]李锦轶.中国东北及邻区若干地质构造问题的新认识[J].地质论评,1998,(44):339-347.
[4]葛文春,吴福元,周长勇,等.大兴安岭北部塔河花岗岩体的时代及对额尔古纳地块构造归属的制约[J].科学通报,2005,50(12):1239-1247.
[5]唐克东.中朝陆台北侧褶皱带构造发展及成矿规律[R].1987.
[6]王荃.内蒙古中部中朝与西伯利亚古板块间缝合线的确定[J].地质学报,1986,(1): 31-43.
[7]张长捷,鲍庆中,吴之理,等.1:25万区域地质调查报告:西乌珠穆沁旗幅[R].2005.
[8] Depaolo D J.Neodymium Isotopes in Geology[J].Springer-Verlag,1988,187.
[9]黄福生.火成岩[M].北京:地质出版社.1992.
[10]邵积东.内蒙古大地构造分区及其特征[R].1998.
[11]王东方.中国东部中、新生代裂谷火山岩带[J].长春地质学报,1985(3):49-56.
[12]内蒙古区调队.1/20万西乌珠穆沁旗幅区域地质调查[R].1978.
[13]内蒙古地矿局.内蒙古自治区岩石地层[M].北京:中国地质大学出版社, 1996.
[14]陈德潜,陈刚.实用稀土元素地球化学[M].北京:冶金工业出版社,1990.
[15]鲍庆中,张长捷,吴之理,等.内蒙古东南部晚古生代裂谷区花岗质岩石锆石SHRI- MPU-Pb定年及其地质意义[J].中国地质,2007,34(5):790-799.
[16]陈义贤,陈文寄,周新华,等.辽西及邻区中生代火山岩-年代学、地球化学和构造背景[M].北京:地震出版社,1997.
[17]包志伟,陈森煌,张桢堂.内蒙古贺根山地区蛇绿岩稀土元素和Sm-Nd同位素研究[J].地球化学,1994,23(4):339-349.
[18]施光海,刘敦一,张福勤,等.中国内蒙古锡林郭勒杂岩SHRIMP锆石U-Pb年代学及意义[J].科学通报,2003,48(20):2187-2192.
[19]王集源.东北地区同位素地质年龄数据汇编(第二辑)[R].1981.
[20]吴家弘.东北地区同位素地质年龄数据汇编(第一辑)[R].1979.
[21]内蒙古区调队.1/5万窟窿山、毡铺幅区域地质调查[R].1989.
[22] Ionov DA,Gregoire M,Prikhod’ko V S.Feldspar-Ti-oxide metasomatism in off-crato- nic continental and oceanic upper mantle[J].Earth and Planetary Science Letters,1999, (165):37-44.
[23] Chen B,Jahn B M,Wilde S,Xu B.Two contrasting Paleozoic magmatic belts in nor- thern Inner Mongolia,China[J].petrogenesis and tectonic implications Tectonophysics, 2000,(328):157-182.
[24] Green T H.Anatexis of mafic crust and high pressure crystallization of andesites. Andesites-Orogenic andesites and related rocks.Thorpe R S ed,John Wiley and Sons. 1982, 17:465-487.
[25]黎彤.大洋地壳和大陆壳的元素丰度[J].大地构造与成矿学,1984,(1):2-8.
[26]杨森楠,杨巍然.中国区域大地构造学[M].北京:地质出版社, 1985.
[27]单文琅,宋鸿林,傅昭仁,等.构造变形分析的理论、方法和实践[M].武汉:中国地质大学出版社,1991.
[28]王东方.中朝陆台北缘大陆构造地质[R].1991.
[29]张臣,李茂松.内蒙古苏左旗地区晚古生代构造-岩浆活动及地壳演化特征[J].高校地质学报.1997,13(1):31-40.
[30]李双林,欧阳自远.兴蒙造山带及邻区的构造格局与构造演化[J].海洋地质与第四纪地质,1998,18(3):45-54.
[31] Abe N, Arai S, Yurimoto H.Geochemical characteristics of the uppermost mantle be- neath the Japan island arcs:Implications for upper mantle evolution[J].Phys Earth Planet.1998,107:233-248.
[32] Wilson M.Igneous Petrology-A Global Tectonic Approach[J].The Academic Division of Unwin Hyman Ltd.1989.
[33]赵振华,王强,熊小林,等.俯冲带复杂的壳幔相互作用[J].矿物岩石地球化学通报, 2004,23(4):277-284.
[34]李春昱,王荃,张之孟,等.中国板块构造的轮廓[J].地球学报,1980,001-002.
[35]徐备,陈斌.内蒙古北部华北板块与西伯利亚板块之间中古生代造山带的结构和演化[J].中国科学(D辑),1997,27(3):227-232.
[36]池际尚.中国东部新生代玄武岩及上地幔研究(附金伯利岩)[M].武汉:中国地质大学出版社,1988.