Melt-Lithosphere Interaction Controlled Compositional Variations in Mafic Dikes from Fujian Province, Southeastern China

Abstract

Late Mesozoic magmatism in southeastern China has been widely considered to be related to the subduction of the Paleo-Pacific Plate. However, it remains controversial whether mafic rocks are derived from the lithosphere or the asthenosphere. Here we present a comprehensive study on mafic dikes from Fujian Province in southeastern China, aiming to understand their source. Two types of mafic rocks have been recognized based on their trace-element features. Type-I rocks show arc-like trace-elemental characteristics, while type-II rocks are distinguished by their relatively flat patterns in primitive-mantle-normalized trace-element diagram. Despite such differences between two types of rocks, these mafic dikes show two trends in the plots of ⁸⁷Sr/⁸⁶Sr_(i) versus La/Nb, which can be explained by the influences of crustal contamination and melt-lithospheric mantle interaction, respectively. ⁸⁷Sr/⁸⁶Sr(i), La/Nb, Sr/Y and Zr/Y ratios of type-I rocks are significantly correlated to the thickness of the underlying lithosphere, and the signals of lithosphere are clearer with increasing lithospheric thickness. This highlights the important influences of melt-lithosphere interaction during their formation. Such observations also indicate that these mafic rocks are more likely to have been originated from the asthenosphere rather than the lithospheric mantle.

Keywords

mafic dike / lithospheric mantle / asthenosphere / melt-lithosphere interaction / southeastern China

References

[1] An M, Shi Y. Lithospheric Thickness of the Chinese Continent. Physics of the Earth and Planetary Interiors, 2006, 159(3/4): 257-266.

[2] Chauvel C, Lewin E, Carpentier M, . Role of Recycled Oceanic Basalt and Sediment in Generating the Hf-Nd Mantle Array. Nature Geoscience, 2008, 1(1): 64-67.

[3] Chen C H, Lee C Y, Shinjo R. Was there Jurassic Paleo-Pacific Subduction in South China?: Constraints from ⁴⁰Ar/³⁹Ar Dating, Elemental and Sr-Nd-Pb Isotopic Geochemistry of the Mesozoic Basalts. Lithos, 2008, 106(1/2): 83-92.

[4] Chen J F, Jahn B M. Crustal Evolution of Southeastern China: Nd and Sr Isotopic Evidence. Tectonophysics, 1998, 284(1/2): 101-133

[5] Chen W S, Yang H C, Wang X, . Tectonic Setting and Exhumation History of the Pingtan-Dongshan Metamorphic Belt along the Coastal Area, Fujian Province, Southeast China. Journal of Asian Earth Sciences, 2002, 20(7): 829-840.

[6] Dai B Z. Geochronology and Geochemistry of the Mesozoic Mafic Magmatisms in Southern Hunan Province, China: Implications for Multi-Stage Lithospheric Extension in South China, 2007, Nanjing: Nanjing University, 1-141

[7] Dasgupta R, Hirschmann M M, Withers A C. Deep Global Cycling of Carbon Constrained by the Solidus of Anhydrous, Carbonated Eclogite under Upper Mantle Conditions. Earth and Planetary Science Letters, 2004, 227(1/2): 73-85.

[8] Davies D R, Rawlinson N, Iaffaldano G, . Lithospheric Controls on Magma Composition along Earth’s Longest Continental Hotspot Track. Nature, 2015, 525(7570): 511-514.

[9] Dong C W, Zhou C, Gu H Y, . The Age Difference, Geochemistry and Petrogenesis of Mafic Dikes and Host Granites from Meizhou Island in Fujian Province. Journal of Jilin University (Earth Science Edition), 2011, 41(3): 735-744

[10] Fan Q C, Liu R X, Xie H S, . Experimental Study of Spinel-Garnet Phase Transition in Upper Mantle and Its Significance. Science in China Series D: Earth Sciences, 1997, 40(4): 383-389.

[11] Feng M, van der Lee S, An M J, . Lithospheric Thickness, Thinning, Subduction, and Interaction with the Asthenosphere beneath China from the Joint Inversion of Seismic S-Wave Train Fits and Rayleigh-Wave Dispersion Curves. Lithos, 2010, 120(1/2): 116-130.

[12] Foley S F, Barth M G, Jenner G A. Rutile/Melt Partition Coefficients for Trace Elements and an Assessment of the Influence of Rutile on the Trace Element Characteristics of Subduction Zone Magmas. Geochimica et Cosmochimica Acta, 2000, 64(5): 933-938.

[13] Halliday A N, Lee D C, Tommasini S, . Incompatible Trace Elements in OIB and MORB and Source Enrichment in the Sub-Oceanic Mantle. Earth and Planetary Science Letters, 1995, 133(3/4): 379-395.

[14] He Z Y, Xu X S. Petrogenesis of the Late Yanshanian Mantle-Derived Intrusions in Southeastern China: Response to the Geodynamics of Paleo-Pacific Plate Subduction. Chemical Geology, 2012, 328: 208-221.

[15] Herzberg C. Identification of Source Lithology in the Hawaiian and Canary Islands: Implications for Origins. Journal of Petrology, 2011, 52(1): 113-146.

[16] Hoernle K, Tilton G, Le Bas M J, . Geochemistry of Oceanic Carbonatites Compared with Continental Carbonatites: Mantle Recycling of Oceanic Crustal Carbonate. Contributions to Mineralogy and Petrology, 2002, 142(5): 520-542.

[17] Hofmann A W. Chemical Differentiation of the Earth: The Relationship between Mantle, Continental Crust, and Oceanic Crust. Earth and Planetary Science Letters, 1988, 90(3): 297-314.

[18] Humphreys E R, Niu Y L. On the Composition of Ocean Island Basalts (OIB): The Effects of Lithospheric Thickness Variation and Mantle Metasomatism. Lithos, 2009, 112(1/2): 118-136.

[19] Jahn B M. Mesozoic Thermal Events in Southeast China. Nature, 1974, 248(5448): 480-483.

[20] Jahn B M, Zhou X H, Li J L. Formation and Tectonic Evolution of Southeastern China and Taiwan: Isotopic and Geochemical Constraints. Tectonophysics, 1990, 183(1/2/3/4): 145-160.

[21] Jia Z B, Chen H, Xia Q K, . Influence of the Subduction of the Pacific Plate on the Mantle Characteristics of South China: Constraints from the Temporal Geochemical Evolution of the Mesozoic Basalts in the Jitai Basin. Lithos, 2020, 352/353: 105253

[22] Jochum K P, Weis U, Schwager B, . Reference Values Following ISO Guidelines for Frequently Requested Rock Reference Materials. Geostandards and Geoanalytical Research, 2016, 40(3): 333-350.

[23] Le Bas M J, Le Maitre R W, Streckeisen A, . A Chemical Classification of Volcanic Rocks Based on the Total Alkali-Silica Diagram. Journal of Petrology, 1986, 27(3): 745-750.

[24] Lei H L, Yang T, Jiang S Y, . A Simple Two-Stage Column Chromatographic Separation Scheme for Strontium, Lead, Neodymium and Hafnium Isotope Analyses in Geological Samples by Thermal Ionization Mass Spectrometry or Multi-Collector Inductively Coupled Plasma Mass Spectrometry. Journal of Separation Science, 2019, 42(20): 3261-3275.

[25] Li Z X, Li X H. Formation of the 1 300-km-Wide Intracontinental Orogen and Postorogenic Magmatic Province in Mesozoic South China: A Flat-Slab Subduction Model. Geology, 2007, 35(2): 179-182.

[26] Litasov K, Ohtani E. The Solidus of Carbonated Eclogite in the System CaO-Al₂O₃-MgO-SiO₂-Na₂O-CO₂ to 32 GPa and Carbonatite Liquid in the Deep Mantle. Earth and Planetary Science Letters, 2010, 295(1/2): 115-126.

[27] Liu J Q, Chen L H, Wang X J, . The Role of Melt-Rock Interaction in the Formation of Quaternary High-MgO Potassic Basalt from the Greater Khingan Range, Northeast China. Journal of Geophysical Research: Solid Earth, 2017, 122(1): 262-280.

[28] Liu J Q, Chen L H, Zeng G, . Lithospheric Thickness Controlled Compositional Variations in Potassic Basalts of Northeast China by Melt-Rock Interactions. Geophysical Research Letters, 2016, 43(6): 2582-2589.

[29] McDonough W F, Sun S S. The Composition of the Earth. Chemical Geology, 1995, 120(3/4): 223-253.

[30] McKenzie D, O’Nions R K. Partial Melt Distributions from Inversion of Rare Earth Element Concentrations. Journal of Petrology, 1991, 32(5): 1021-1091.

[31] Meng L F, Li Z X, Chen H L, . Geochronological and Geochemical Results from Mesozoic Basalts in Southern South China Block Support the Flat-Slab Subduction Model. Lithos, 2012, 132/133 127-140.

[32] Niu Y L, Collerson K D, Batiza R, . Origin of Enriched-Type Mid-Ocean Ridge Basalt at Ridges Far from Mantle Plumes: The East Pacific Rise at 11°20N. Journal of Geophysical Research: Solid Earth, 1999, 104(B4): 7067-7087.

[33] Niu Y L, Wilson M, Humphreys E R, . The Origin of Intra-Plate Ocean Island Basalts (OIB): The Lid Effect and Its Geodynamic Implications. Journal of Petrology, 2011, 52(7/8): 1443-1468.

[34] Pearce J A, Peate D W. Tectonic Implications of the Composition of Volcanic Arc Magmas. Annual Review of Earth and Planetary Sciences, 1995, 23(1): 251-285.

[35] Qin S C, Fan W M, Guo F, . Petrogenesis of Late Mesozoic Diabase Dikes in Zhejiang-Fujian Provinces: Constraints from Ar-Ar Dating and Geochemistry. Acta Petrologica Sinica, 2010, 26(11): 3295-3306

[36] Shen X Z, Kind R, Huang Z C, . Imaging the Mantle Lithosphere below the China Cratons Using S-to-P Converted Waves. Tectonophysics, 2019, 754: 73-79.

[37] Sobolev A V, Hofmann A W, Kuzmin D V, . The Amount of Recycled Crust in Sources of Mantle-Derived Melts. Science, 2007, 316(5823): 412-417.

[38] Wan T F, Tong Y F, Zheng W W. Thermal Structure of Lithosphere in Fujian, China. Geoscience, 1987, 1(3/4): 412-423

[39] Wan Y S, Liu D Y, Xu M H, . SHRIMP U-Pb Zircon Geochronology and Geochemistry of Metavolcanic and Metasedimentary Rocks in Northwestern Fujian, Cathaysia Block, China: Tectonic Implications and the Need to Redefine Lithostratigraphic Units. Gondwana Research, 2007, 12(1/2): 166-183.

[40] Wang X Y, Yang Z, Chen N S, . Petrogenesis and Ore Genesis of the Late Yanshanian Granites and Associated Porphyry-Skarn W-Mo Deposits from the Yunkai Area of South China: Evidence from the Zircon U-Pb Ages, Hf Isotopes and Sulfide S-Fe Isotopes. Journal of Earth Science, 2018, 29(4): 939-959.

[41] Wang Y J, Fan W M, Guo F, . Geochemistry of Mesozoic Mafic Rocks Adjacent to the Chenzhou-Linwu Fault, South China: Implications for the Lithospheric Boundary between the Yangtze and Cathaysia Blocks. International Geology Review, 2003, 45(3): 263-286.

[42] Workman R K, Hart S R. Major and Trace Element Composition of the Depleted MORB Mantle (DMM). Earth and Planetary Science Letters, 2005, 231(1/2): 53-72.

[43] Yang Y F. Chronology and Geochemistry of Late Mesozoic Basic-Intermediate Dike Swarms from the Coastland of Fujian Province, 2008, Hangzhou: Zhejiang University, 1-67

[44] Yasuda A, Fujii T, Kurita K. Melting Phase Relations of an Anhydrous Mid-Ocean Ridge Basalt from 3 to 20 GPa: Implications for the Behavior of Subducted Oceanic Crust in the Mantle. Journal of Geophysical Research: Solid Earth, 1994, 99(B5): 9401-9414.

[45] Yu J H, Xu X S, O’Reilly S Y, . Granulite Xenoliths from Cenozoic Basalts in SE China Provide Geochemical Fingerprints to Distinguish Lower Crust Terranes from the North and South China Tectonic Blocks. Lithos, 2003, 67(1/2): 77-102.

[46] Zeng G, Chen L H, Hu S L, . Genesis of Cenozoic Low-Ca Alkaline Basalts in the Nanjing Basaltic Field, Eastern China: The Case for Mantle Xenolith-Magma Interaction. Geochemistry, Geophysics, Geosystems, 2013, 14(5): 1660-1677.

[47] Zeng G, Chen L H, Xu X S, . Carbonated Mantle Sources for Cenozoic Intra-Plate Alkaline Basalts in Shandong, North China. Chemical Geology, 2010, 273(1/2): 35-45.

[48] Zeng G, He Z Y, Li Z, . Geodynamics of Paleo-Pacific Plate Subduction Constrained by the Source Lithologies of Late Mesozoic Basalts in Southeastern China. Geophysical Research Letters, 2016, 43(19): 10189-10197.

[49] Zhang B, Guo F, Zhang X B, . Early Cretaceous Subduction of Paleo-Pacific Ocean in the Coastal Region of SE China: Petrological and Geochemical Constraints from the Mafic Intrusions. Lithos, 2019, 334/335: 8-24.

[50] Zhang G L, Chen L H, Jackson M G, . Evolution of Carbonated Melt to Alkali Basalt in the South China Sea. Nature Geoscience, 2017, 10(3): 229-235.

[51] Zhang G S. Chronology, Geochemistry, and Geodynamic Significance of the Mafic-Ultramafic Rocks in Fujian Province since Late Mesozoic, 2006, Guiyang: Institute of Geochemistry, Chinese Academy of Sciences, 1-138

[52] Zhang H F, Goldstein S L, Zhou X H, . Evolution of Subcontinental Lithospheric Mantle beneath Eastern China: Re-Os Isotopic Evidence from Mantle Xenoliths in Paleozoic Kimberlites and Mesozoic Basalts. Contributions to Mineralogy and Petrology, 2008, 155(3): 271-293.

[53] Zhao J H. Chronology and Geochemistry of Mafic Rocks from Fujian Province: Implications for the Mantle Evolution of SE China since Late Mesozoic, 2004, Guiyang: Institute of Geochemistry, Chinese Academy of Sciences, 1-116

[54] Zhao J H, Hu R Z, Liu S. Geochemistry, Petrogenesis, and Tectonic Significance of Mesozoic Mafic Dikes, Fujian Province, Southeastern China. International Geology Review, 2004, 46(6): 542-557.

[55] Zhao J H, Hu R Z, Zhou M F, . Elemental and Sr-Nd-Pb Isotopic Geochemistry of Mesozoic Mafic Intrusions in Southern Fujian Province, SE China: Implications for Lithospheric Mantle Evolution. Geological Magazine, 2007, 144(6): 937-952.

[56] Zhou X M, Li W X. Origin of Late Mesozoic Igneous Rocks in Southeastern China: Implications for Lithosphere Subduction and Underplating of Mafic Magmas. Tectonophysics, 2000, 326(3/4): 269-287.

[57] Zhou X M, Sun T, Shen W Z, . Petrogenesis of Mesozoic Granitoids and Volcanic Rocks in South China: A Response to Tectonic Evolution. Episodes, 2006, 29(1): 26-33.