Geochemical and Mineralogical Investigation on Different Types of Cenozoic Basalts in the Sanshui Basin:Implications for Magma Mixing Processes
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摘要
Two kinds of basalts with different chemical compositions were obtained in the Sanshui Basin, they share the same eruption period. Although they have significant differences in major and trace element concentrations, their isotopic ratios suggest a similar magma source. Based on mineral geochemical analysis, orthopyroxene with reaction rim and zoned clinopyroxene are observed in Zidong(ZD)basalts, but not found in Wangjiegang(WJG) basalts. Linear scanning of these minerals suggests compositional variation between within-plate tholeiite and within-plate alkali-basalt. Presence of a doublelayer magma chamber under the Sanshui Basin, and occurrence of magma mixing between upper and lower chambers is proposed. This magma mixing leads to different chemical composition and mineral constitution of two kinds of basalts, as well as reaction rim and compositional variation of minerals in ZD basalts.
Two kinds of basalts with different chemical compositions were obtained in the Sanshui Basin, they share the same eruption period. Although they have significant differences in major and trace element concentrations, their isotopic ratios suggest a similar magma source. Based on mineral geochemical analysis, orthopyroxene with reaction rim and zoned clinopyroxene are observed in Zidong(ZD)basalts, but not found in Wangjiegang(WJG) basalts. Linear scanning of these minerals suggests compositional variation between within-plate tholeiite and within-plate alkali-basalt. Presence of a doublelayer magma chamber under the Sanshui Basin, and occurrence of magma mixing between upper and lower chambers is proposed. This magma mixing leads to different chemical composition and mineral constitution of two kinds of basalts, as well as reaction rim and compositional variation of minerals in ZD basalts.
Two kinds of basalts with different chemical compositions were obtained in the Sanshui Basin, they share the same eruption period. Although they have significant differences in major and trace element concentrations, their isotopic ratios suggest a similar magma source. Based on mineral geochemical analysis, orthopyroxene with reaction rim and zoned clinopyroxene are observed in Zidong(ZD)basalts, but not found in Wangjiegang(WJG) basalts. Linear scanning of these minerals suggests compositional variation between within-plate tholeiite and within-plate alkali-basalt. Presence of a doublelayer magma chamber under the Sanshui Basin, and occurrence of magma mixing between upper and lower chambers is proposed. This magma mixing leads to different chemical composition and mineral constitution of two kinds of basalts, as well as reaction rim and compositional variation of minerals in ZD basalts.
引文
Bureau of Geology and Mineralogy of Guangdong Province,1988.Regional Geology of the Guangdong Province.Geology Publishing House,Beijing.941(in Chinese)
Chen,W.,Zhang,W.Q.,Simonetti,A.,et al.,2016.Mineral Chemistry of Melanite from Calcitic Ijolite,the Oka Carbonatite Complex,Canada:Implications for Multi-Pulse Magma Mixing.Journal of Earth Science,27(4):599-610.https://doi.org/10.1007/s12583-016-0715-3
Chung,S.L.,Cheng,H.,Jahn,B.M.,et al.,1997.Major and Trace Element,and Sr-Nd Isotope Constraints on the Origin of Paleogene Volcanism in South China Prior to the South China Sea Opening.Lithos,40:203-220.https://doi.org/10.1016/S0024-4937(97)00028-5
Davidson,J.P.,Morgan,D.J.,et al.,2007.Microsampling and Isotopic Analysis of Igneous Rocks:Implications for the Study of Magmatic Systems.Annual Review of Earth and Planetary Sciences,35(1):273-311.https://doi.org/10.1146/annurev.earth.35.031306.140211
Dong,Y.X.,Xiao,L.,Zhou,H.N.,et al.,2006.Spatial Distribution and Petrological Characteristics of the Bimodal Volcanic Rocks from Sanshui Basin,Guangdong Province:Implication for Basin Dynamics.Geotectonica et Metallogenia,30:82-92(in Chinese with English Abstract)
Ginibre,C.,W?rner,G.,Kronz,A.,2002a.Minor-and Trace-Element Zoning in Plagioclase:Implications for Magma Chamber Processes at Parinacota Volcano,Northern Chile.Contributions to Mineralogy and Petrology,143(3):300-315.https://doi.org/10.1007/s00410-002-0351-z
Ginibre,C.,Kronz,A.,W?rner,G.,2002b.High-Resolution Quantitative Imaging of Plagioclase Composition Using Accumulated Backscattered Electron Images:New Constraints on Oscillatory Zoning.Contributions to Mineralogy and Petrology,142(4):436-448.https://doi.org/10.1007/s004100100298
Ginibre,C.,W?rner,G.,2007.Variable Parent Magmas and Recharge Regimes of the Parinacota Magma System(N.Chile)Revealed by Fe,Mg and Sr Zoning in Plagioclase.Lithos,98(1-4):118-140.https://doi.org/10.1016/j.lithos.2007.03.004
Hou,M.C.,Chen,H.D.,Tian,J.C.,et al.,2007.The LithofaciesPaleogeographic Character and Evolution of the Sanshui Basin during Cretaceous in Guangdong,China.Journal of Chengdu University of Technology(Science&Technology Edition),34:238-244(in Chinese with English Abstract)
Hou,M.C.,Lin,L.B.,Chen,H.D.,2010.Sedimentary and Tectonic Evolution of Sanshui Basin,Guandong Province.Geology Publishing House,Beijing.88(in Chinese)
Huang,Y.,Liang,W.,Zhang,L.K.,et al.,2018.The Initial Break-up between Tethyan-Himalaya and Indian Terrane:Evidences from Late Cretaceous OIB-Type Basalt in Southern Tibet.Earth Science,43(8):2651-2663(in Chinese with English Abstract).https://doi.org/10.3799/dqkx.2017.573
Le Maitre,R.W.,Streckeisen,A.,Zanettin,B.,et al.,2002.Igneous Rocks:AClassification and Glossary of Terms.Cambridge University Press,Cambridge
Leterrier,J.,Maury,R.C.,Thonon,P.,et al.,1982.Clinopyroxene Composition as a Method of Identification of the Magmatic Affinities of PaleoVolcanic Series.Earth and Planetary Science Letters,59(1):139-154.https://doi.org/10.1016/0012-821x(82)90122-4
Li,D.M.,Chen,W.J.,Wang,X.,et al.,1989.40Ar-39Ar Age of Trachyte ZGCfrom Zoumaying,Nanhaicounty,Guangdong Province.Seismology and Geology 11:82-84(in Chinese)
Li,X.W.,Mo,X.X.,Scheltens,M.,et al.,2016.Mineral Chemistry and Crystallization Conditions of the Late Cretaceous Mamba Pluton from the Eastern Gangdese,Southern Tibetan Plateau.Journal of Earth Science,27(4):545-570.https://doi.org/10.1007/s12583-016-0713-5
Nisbet,E.G.,Pearce,J.A.,1977.Clinopyroxene Composition in Mafic Lavas from Different Tectonic Settings.Contributions to Mineralogy and Petrology,63(2):149-160.https://doi.org/10.1007/bf00398776
Ru,K.,Piggot,J.D.,1986.Episodic Rifting and Subsidence in the South China Sea.AAPG Bulletin,70(9):1136-1155.https://doi.org/10.1029/jb091ib10p10513
Salisbury,M.J.,Bohrson,W.A.,Clynne,M.A.,et al.,2008.Multiple Plagioclase Crystal Populations Identified by Crystal Size Distribution and in-situ Chemical Data:Implications for Timescales of Magma Chamber Processes Associated with the 1915 Eruption of Lassen Peak,CA.Journal of Petrology,49(10):1755-1780.https://doi.org/10.1093/petrology/egn045
Shaw,C.S.J.,Heidelbach,F.,Dingwell,D.B.,2006.The Origin of Reaction Textures in Mantle Peridotite Xenoliths from Sal Island,Cape Verde:The Case for“Metasomatism”by the Host Lava.Contributions to Mineralogy and Petrology,151(6):681-697.https://doi.org/10.1007/s00410-006-0087-2
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.https://doi.org/10.1144/gsl.sp.1989.042.01.19
Tang,Z.Y.,1984.Relationship of Oil and Gas with Volcanism in Sanshui Basin.Oil&Gas Geology,5:89-100(in Chinese with English Abstract)
Tang,Z.Y.,1994.Cretaceous-Eogene Rift Valley-Type Volcanism in Sanshui Basin,Guangdong.Guangdong Geology,9:49-54(in Chinese with English Abstract)
Taylor,B.,Hayes,D.E.,1983.Origin and History of the South China Basin.In:Hayes,D.E.,ed.,The Tectonic and Geologic Evolution of Southeast Asian Seas and Islands:Part 2.AGU Geophyscal Monograph Series,27:23-56
Viccaro,M.,Giacomoni,P.P.,Ferlito,C.,et al.,2010.Dynamics of Magma Supply at Mt.Etna Volcano(Southern Italy)as Revealed by Textural and Compositional Features of Plagioclase Phenocrysts.Lithos,116(1/2):77-91.https://doi.org/10.1016/j.lithos.2009.12.012
Xiao,L.,Zhou,H.N.,Dong,Y.X.,et al.,2006.Geochemistry and Petrogenesis of Cenozoic Volcanic Rocks from Sanshui Basin:Implications for Spatial and Temporal Variation of Rock Types and Constraints on the Formation of South China Sea.Geotectonica et Metallogenia,30:72-81(in Chinese with English Abstract)
Zhu,B.Q.,Wang,H.F.,Chen,Y.W.,et al.,2004.Geochronological and Geochemical Constraint on the Cenozoic Extension of Cathaysian Lithosphere and Tectonic Evolution of the Border Sea Basins in East Asia.Journal of Asian Earth Sciences,24(2):163-175.https://doi.org/10.1016/j.jseaes.2003.10.006
Zhu,B.Q.,Wang,H.F.,Mao,C.X.,et al.,1989.Geochronology of and NdSr-Pb Isotopic Evidence for Mantle Source in the Ancient Subduction Zone beneath Sanshui Basin,Guangdong Province,China.Chinese Journal of Geochemistry,8(1):65-71(in Chinese with English Abstract)
Zou,H.P.,1995.On the Diwa Basin System of Continental Margin Spreading Type and Its Genetic Mechanism.Geotectonica et Metallogenia,19:303-313(in Chinese with English Abstract)
Zou,H.P.,2001.Continental Marginal Rifting along the Northern South China Sea:The Crustal Response to the Lower Lithospheric Delamination.Martin Geology&Quaternary Geology,21:39-44(in Chinese with English Abstract)
Chen,W.,Zhang,W.Q.,Simonetti,A.,et al.,2016.Mineral Chemistry of Melanite from Calcitic Ijolite,the Oka Carbonatite Complex,Canada:Implications for Multi-Pulse Magma Mixing.Journal of Earth Science,27(4):599-610.https://doi.org/10.1007/s12583-016-0715-3
Chung,S.L.,Cheng,H.,Jahn,B.M.,et al.,1997.Major and Trace Element,and Sr-Nd Isotope Constraints on the Origin of Paleogene Volcanism in South China Prior to the South China Sea Opening.Lithos,40:203-220.https://doi.org/10.1016/S0024-4937(97)00028-5
Davidson,J.P.,Morgan,D.J.,et al.,2007.Microsampling and Isotopic Analysis of Igneous Rocks:Implications for the Study of Magmatic Systems.Annual Review of Earth and Planetary Sciences,35(1):273-311.https://doi.org/10.1146/annurev.earth.35.031306.140211
Dong,Y.X.,Xiao,L.,Zhou,H.N.,et al.,2006.Spatial Distribution and Petrological Characteristics of the Bimodal Volcanic Rocks from Sanshui Basin,Guangdong Province:Implication for Basin Dynamics.Geotectonica et Metallogenia,30:82-92(in Chinese with English Abstract)
Ginibre,C.,W?rner,G.,Kronz,A.,2002a.Minor-and Trace-Element Zoning in Plagioclase:Implications for Magma Chamber Processes at Parinacota Volcano,Northern Chile.Contributions to Mineralogy and Petrology,143(3):300-315.https://doi.org/10.1007/s00410-002-0351-z
Ginibre,C.,Kronz,A.,W?rner,G.,2002b.High-Resolution Quantitative Imaging of Plagioclase Composition Using Accumulated Backscattered Electron Images:New Constraints on Oscillatory Zoning.Contributions to Mineralogy and Petrology,142(4):436-448.https://doi.org/10.1007/s004100100298
Ginibre,C.,W?rner,G.,2007.Variable Parent Magmas and Recharge Regimes of the Parinacota Magma System(N.Chile)Revealed by Fe,Mg and Sr Zoning in Plagioclase.Lithos,98(1-4):118-140.https://doi.org/10.1016/j.lithos.2007.03.004
Hou,M.C.,Chen,H.D.,Tian,J.C.,et al.,2007.The LithofaciesPaleogeographic Character and Evolution of the Sanshui Basin during Cretaceous in Guangdong,China.Journal of Chengdu University of Technology(Science&Technology Edition),34:238-244(in Chinese with English Abstract)
Hou,M.C.,Lin,L.B.,Chen,H.D.,2010.Sedimentary and Tectonic Evolution of Sanshui Basin,Guandong Province.Geology Publishing House,Beijing.88(in Chinese)
Huang,Y.,Liang,W.,Zhang,L.K.,et al.,2018.The Initial Break-up between Tethyan-Himalaya and Indian Terrane:Evidences from Late Cretaceous OIB-Type Basalt in Southern Tibet.Earth Science,43(8):2651-2663(in Chinese with English Abstract).https://doi.org/10.3799/dqkx.2017.573
Le Maitre,R.W.,Streckeisen,A.,Zanettin,B.,et al.,2002.Igneous Rocks:AClassification and Glossary of Terms.Cambridge University Press,Cambridge
Leterrier,J.,Maury,R.C.,Thonon,P.,et al.,1982.Clinopyroxene Composition as a Method of Identification of the Magmatic Affinities of PaleoVolcanic Series.Earth and Planetary Science Letters,59(1):139-154.https://doi.org/10.1016/0012-821x(82)90122-4
Li,D.M.,Chen,W.J.,Wang,X.,et al.,1989.40Ar-39Ar Age of Trachyte ZGCfrom Zoumaying,Nanhaicounty,Guangdong Province.Seismology and Geology 11:82-84(in Chinese)
Li,X.W.,Mo,X.X.,Scheltens,M.,et al.,2016.Mineral Chemistry and Crystallization Conditions of the Late Cretaceous Mamba Pluton from the Eastern Gangdese,Southern Tibetan Plateau.Journal of Earth Science,27(4):545-570.https://doi.org/10.1007/s12583-016-0713-5
Nisbet,E.G.,Pearce,J.A.,1977.Clinopyroxene Composition in Mafic Lavas from Different Tectonic Settings.Contributions to Mineralogy and Petrology,63(2):149-160.https://doi.org/10.1007/bf00398776
Ru,K.,Piggot,J.D.,1986.Episodic Rifting and Subsidence in the South China Sea.AAPG Bulletin,70(9):1136-1155.https://doi.org/10.1029/jb091ib10p10513
Salisbury,M.J.,Bohrson,W.A.,Clynne,M.A.,et al.,2008.Multiple Plagioclase Crystal Populations Identified by Crystal Size Distribution and in-situ Chemical Data:Implications for Timescales of Magma Chamber Processes Associated with the 1915 Eruption of Lassen Peak,CA.Journal of Petrology,49(10):1755-1780.https://doi.org/10.1093/petrology/egn045
Shaw,C.S.J.,Heidelbach,F.,Dingwell,D.B.,2006.The Origin of Reaction Textures in Mantle Peridotite Xenoliths from Sal Island,Cape Verde:The Case for“Metasomatism”by the Host Lava.Contributions to Mineralogy and Petrology,151(6):681-697.https://doi.org/10.1007/s00410-006-0087-2
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.https://doi.org/10.1144/gsl.sp.1989.042.01.19
Tang,Z.Y.,1984.Relationship of Oil and Gas with Volcanism in Sanshui Basin.Oil&Gas Geology,5:89-100(in Chinese with English Abstract)
Tang,Z.Y.,1994.Cretaceous-Eogene Rift Valley-Type Volcanism in Sanshui Basin,Guangdong.Guangdong Geology,9:49-54(in Chinese with English Abstract)
Taylor,B.,Hayes,D.E.,1983.Origin and History of the South China Basin.In:Hayes,D.E.,ed.,The Tectonic and Geologic Evolution of Southeast Asian Seas and Islands:Part 2.AGU Geophyscal Monograph Series,27:23-56
Viccaro,M.,Giacomoni,P.P.,Ferlito,C.,et al.,2010.Dynamics of Magma Supply at Mt.Etna Volcano(Southern Italy)as Revealed by Textural and Compositional Features of Plagioclase Phenocrysts.Lithos,116(1/2):77-91.https://doi.org/10.1016/j.lithos.2009.12.012
Xiao,L.,Zhou,H.N.,Dong,Y.X.,et al.,2006.Geochemistry and Petrogenesis of Cenozoic Volcanic Rocks from Sanshui Basin:Implications for Spatial and Temporal Variation of Rock Types and Constraints on the Formation of South China Sea.Geotectonica et Metallogenia,30:72-81(in Chinese with English Abstract)
Zhu,B.Q.,Wang,H.F.,Chen,Y.W.,et al.,2004.Geochronological and Geochemical Constraint on the Cenozoic Extension of Cathaysian Lithosphere and Tectonic Evolution of the Border Sea Basins in East Asia.Journal of Asian Earth Sciences,24(2):163-175.https://doi.org/10.1016/j.jseaes.2003.10.006
Zhu,B.Q.,Wang,H.F.,Mao,C.X.,et al.,1989.Geochronology of and NdSr-Pb Isotopic Evidence for Mantle Source in the Ancient Subduction Zone beneath Sanshui Basin,Guangdong Province,China.Chinese Journal of Geochemistry,8(1):65-71(in Chinese with English Abstract)
Zou,H.P.,1995.On the Diwa Basin System of Continental Margin Spreading Type and Its Genetic Mechanism.Geotectonica et Metallogenia,19:303-313(in Chinese with English Abstract)
Zou,H.P.,2001.Continental Marginal Rifting along the Northern South China Sea:The Crustal Response to the Lower Lithospheric Delamination.Martin Geology&Quaternary Geology,21:39-44(in Chinese with English Abstract)