Metamorphic Evolution of a Tremolite Marble from the Dabie UHP Terrane, China: A Focus on Zircon

Abstract

In this study, a tremolite marble from the Dabie ultrahigh-pressure (UHP) terrane, east-central China was investigated for its metamorphic evolution by focusing on zircon. The marble contains an amphibolite-facies assemblage of dolomite, Mg-calcite, tremolite, biotite, and plagioclase, while zircon in the marble witnesses a complex recrystallization and growth history under both amphibolite-and eclogite-facies conditions. Cathodoluminescence reveals eight characteristic zones for zircon. As indicated by mineral inclusions in zircon, two zones formed no earlier than amphibolite-facies retrogression and are too thin to date. The other six zones contain inclusions of dolomite, aragonite, diopside (X _Na=Na/(Na+Ca)=0.11–0.14), garnet (X _Ca=0.51–0.62, X _Mg=0.21–0.23, X _Fe=0.17–0.26, X _Mn=0.01), phengite and rutile, and formed under eclogite-facies conditions. Phase equilibria calculations illustrat that the Na-richest diopside formed under UHP conditions. Being an accessory eclogite-facies mineral in the marble, the analyzed chemistry of garnet inclusions cannot be reproduced by phase equilibria calculations because solid-solution models for many other minerals don’t incorporate Mn-endmembers. The eclogite-facies zircon zones show low HREE contents and flat MREE-HREE distribution patterns, which are interpreted to have been determined by the low bulk-rock HREE content instead of the presence of accessary garnet in the marble. U-Pb dating yielded a large age dataset ranging from about 250 to 210 Ma for the eclogite-facies zircon zones. Statistically, the eclogite-facies ages are characterized by a Gaussian distribution with a median peak at 232 Ma. We propose that zircon experienced a “protracted” recrystallization and/or growth history in the tremolite marble during the Triassic subduction and exhumation.

Keywords

Dabie / UHP / marble / mineral inclusion / recrystallization / zoned zircon / tectonics

References

Anovitz L M, Essene E J. Phase Equilibria in the System CaCO₃-MgCO₃-FeCO₃. Journal of Petrology, 1987, 28(2): 389-415.

Bingen B, Austrheim H, Whitehouse M. Ilmenite as a Source for Zirconium during High-Grade Metamorphism? Textural Evidence from the Caledonides of Western Norway and Implications for Zircon Geochronology. Journal of Petrology, 2001, 42(2): 355-375.

Castelli D, Rolfo F, Groppo C, . Impure Marbles from the UHP Brossasco-Isasca Unit (Dora-Maira Massif, Western Alps): Evidence for Alpine Equilibration in the Diamond Stability Field and Evaluation of the X(CO₂) Fluid Evolution. Journal of Metamorphic Geology, 2007, 25(6): 587-603.

Chen R X, Zheng Y F, Xie L W. Metamorphic Growth and Recrystallization of Zircon: Distinction by Simultaneous in-situ Analyses of Trace Elements, U-Th-Pb and Lu-Hf Isotopes in Zircons from Eclogite-Facies Rocks in the Sulu Orogen. Lithos, 2010, 114(1/2): 132-154.

Chen Y X, Zheng Y F, Chen R X, . Metamorphic Growth and Recrystallization of Zircons in Extremely ¹⁸O-Depleted Rocks during Eclogite-Facies Metamorphism: Evidence from U-Pb Ages, Trace Elements, and O-Hf Isotopes. Geochimica et Cosmochimica Acta, 2011, 75(17): 4877-4898.

Connolly J A D. Computation of Phase Equilibria by Linear Programming: A Tool for Geodynamic Modeling and Its Application to Subduction Zone Decarbonation. Earth and Planetary Science Letters, 2005, 236(1/2): 524-541.

Connolly J A D, Trommsdorff V. Petrogenetic Grids for Metacarbonate Rocks: Pressure-Temperature Phase-Diagram Projection for Mixed-Volatile Systems. Contributions to Mineralogy and Petrology, 1991, 108(1/2): 93-105.

Corfu F. Atlas of Zircon Textures. Reviews in Mineralogy and Geochemistry, 2003, 53(1): 469-500.

Degeling H, Eggins S, Ellis D J. Zr Budgets for Metamorphic Reactions, and the Formation of Zircon from Garnet Breakdown. Mineralogical Magazine, 2001, 65(6): 749-758.

Ernst W G, Tsujimori T, Zhang R, . Permo-Triassic Collision, Subduction-Zone Metamorphism, and Tectonic Exhumation along the East Asian Continental Margin. Annual Review of Earth and Planetary Sciences, 2007, 35(1): 73-110.

Ferry J M, Watson E B. New Thermodynamic Models and Revised Calibrations for the Ti-in-Zircon and Zr-in-Rutile Thermometers. Contributions to Mineralogy and Petrology, 2007, 154(4): 429-437.

Fuhrman M L, Lindsley D H. Ternary-Feldspar Modeling and Thermometry. American Mineralogist, 1988, 73: 201-215.

Geisler T, Schaltegger U, Tomaschek F. Re-Equilibration of Zircon in Aqueous Fluids and Melts. Elements, 2007, 3(1): 43-50.

Hacker B R, Ratschbacher L, Webb L, . Exhumation of Ultrahigh-Pressure Continental Crust in East Central China: Late Triassic-Early Jurassic Tectonic Unroofing. Journal of Geophysical Research: Solid Earth, 2000, 105(B6): 13339-13364.

Hermann J, Troitzsch U, Scott D. Experimental Subsolidus Phase Relations in the System CaCO₃-CaMg(CO₃)₂ up to 6.5 GPa and Implications for Subducted Marbles. Contributions to Mineralogy and Petrology, 2016, 171(10): 1-17.

Holland T J B, Powell R. An Internally Consistent Thermodynamic Data Set for Phases of Petrological Interest. Journal of Metamorphic Geology, 2004, 16(3): 309-343.

Hoskin P W O. The Composition of Zircon and Igneous and Metamorphic Petrogenesis. Reviews in Mineralogy and Geochemistry, 2003, 53(1): 27-62.

Hoskin P W O, Black L P. Metamorphic Zircon Formation by Solid-State Recrystallization of Protolith Igneous Zircon. Journal of Metamorphic Geology, 2000, 18(4): 423-439.

Hu Z C, Gao S, Liu Y S, . Signal Enhancement in Laser Ablation ICP-MS by Addition of Nitrogen in the Central Channel Gas. Journal of Analytical Atomic Spectrometry, 2008, 23(8): 1093-1101.

Jiang S H, Wang Z M, Chen R X, . Water of Garnet in Eclogite from Jinheqiao Area in the Dabie Orogen. Earth Science, 2020, 45(4): 1168-1186. (in Chinese with English Abstract)

Li S G, Xiao Y L, Liou D L, . Collision of the North China and Yangtse Blocks and Formation of Coesite-Bearing Eclogites: Timing and Processes. Chemical Geology, 1993, 109(1/2/3/4): 89-111.

Liu F L, Gerdes A, Liou J G, . SHRIMP U-Pb Zircon Dating from Sulu-Dabie Dolomitic Marble, Eastern China: Constraints on Prograde, Ultrahigh-Pressure and Retrograde Metamorphic Ages. Journal of Metamorphic Geology, 2006, 24(7): 569-589.

Liu F L, Liou J G. Zircon as the Best Mineral for P-T-Time History of UHP Metamorphism: A Review on Mineral Inclusions and U-Pb SHRIMP Ages of Zircons from the Dabie-Sulu UHP Rocks. Journal of Asian Earth Sciences, 2011, 40(1): 1-39.

Liu J B, Ye K, Maruyama S, . Mineral Inclusions in Zircon from Gneisses in the Ultrahigh-Pressure Zone of the Dabie Mountains, China. The Journal of Geology, 2001, 109(4): 523-535.

Liu P L, Massonne H J. Tectonic Implications of P-T Paths Derived for Garnet-Bearing Felsic Gneisses from the Dabie and Sulu Ultrahigh Pressure Terranes, East-Central China. American Journal of Science, 2019, 319(9): 788-817.

Liu P L, Massonne H J, Harlov D E, . High-Pressure Fluid-Rock Interaction and Mass Transfer during Exhumation of Deeply Subducted Rocks: Insights from an Eclogite-Vein System in the Ultrahigh-Pressure Terrane of the Dabie Shan, China. Geochemistry, Geophysics, Geosystems, 2019, 20(12): 5786-5817.

Liu P L, Massonne H J, Jin Z M, . Diopside, Apatite, and Rutile in an Ultrahigh Pressure Impure Marble from the Dabie Shan, Eastern China: A Record of Eclogite-Facies Metasomatism during Exhumation. Chemical Geology, 2017, 466: 123-139.

Liu P L, Massonne H J, Zhang J F, . Intergranular Coesite and Coesite Inclusions in Dolomite from the Dabie Shan: Constraints on the Preservation of Coesite in UHP Rocks. Terra Nova, 2017, 29(3): 154-161.

Liu P L, Wu Y, Chen Y, . UHP Impure Marbles from the Dabie Mountains: Metamorphic Evolution and Carbon Cycling in Continental Subduction Zones. Lithos, 2015, 212/213/214/215: 280-297.

Liu P L, Wu Y, Liu Q, . Partial Melting of UHP Calc-Gneiss from the Dabie Mountains. Lithos, 2014, 192/193/194/195: 86-101.

Liu Y C, Wang H, Yang Y, . Dating of Carboniferous Metamorphism for Garnet Amphibolite from the Eastern Beihuaiyang Zone in the Dabie Orogen. Earth Science, 2020, 45(2): 355-366. (in Chinese with English Abstract)

Liu Y S, Gao S, Hu Z C, . Continental and Oceanic Crust Recycling-Induced Melt-Peridotite Interactions in the Trans-North China Orogen: U-Pb Dating, Hf Isotopes and Trace Elements in Zircons from Mantle Xenoliths. Journal of Petrology, 2010, 51(1/2): 537-571.

Liu Y S, Hu Z C, Gao S, . In situ Analysis of Major and Trace Elements of Anhydrous Minerals by LA-ICP-MS without Applying an Internal Standard. Chemical Geology, 2008, 257(1/2): 34-43.

Lü Z, Bucher K, Zhang L F. Omphacite-Bearing Calcite Marble and Associated Coesite-Bearing Pelitic Schist from the Meta-Ophiolitic Belt of Chinese Western Tianshan. Journal of Asian Earth Sciences, 2013, 76: 37-47.

Ludwig K R. ISOPLOT 3.00: A Geochronological Toolkit for Microsoft Excel, 2003, California, Berkeley: Berkeley Geochronology Center, 39

Martin L A J, Duchêne S, Deloule E, . Mobility of Trace Elements and Oxygen in Zircon during Metamorphism: Consequences for Geochemical Tracing. Earth and Planetary Science Letters, 2008, 267(1/2): 161-174.

Massonne H J. Phase Relations of Siliceous Marbles at Ultrahigh Pressure Based on Thermodynamic Calculations: Examples from the Kokchetav Massif, Kazakhstan and the Sulu Terrane, China. Geological Journal, 2011, 46(2/3): 114-125.

Massonne H J. Derivation of P-T Paths from High-Pressure Metagranites—Examples from the Gran Paradiso Massif, Western Alps. Lithos, 2015, 226: 265-279.

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

Ogasawara Y, Zhang R Y, Liou J G. Petrogenesis of Dolomitic Marbles from Rongcheng in the Su-Lu Ultrahigh-Pressure Metamorphic Terrane, Eastern China. The Island Arc, 1998, 7(1/2): 82-97.

Peucat J J, Hirata T, Nesbitt R W. REE Fractionation (ICPMS LASER) Evidence in Metamorphic Zircons during Granulite Facies Metamorphism and Anatectic Processes. Terra Abstracts, 1995, 7(Suppl. 1): 346

Rubatto D. Zircon Trace Element Geochemistry: Partitioning with Garnet and the Link between U-Pb Ages and Metamorphism. Chemical Geology, 2002, 184 1/2 123-138.

Rubatto D, Hermann J. Zircon Formation during Fluid Circulation in Eclogites (Monviso, Western Alps): Implications for Zr and Hf Budget in Subduction Zones. Geochimica et Cosmochimica Acta, 2003, 67(12): 2173-2187.

Rubatto D, Hermann J. Zircon Behaviour in Deeply Subducted Rocks. Elements, 2007, 3(1): 31-35.

Rubatto D, Muntener O, Barnhoorn A, . Dissolution-Reprecipitation of Zircon at Low-Temperature, High-Pressure Conditions (Lanzo Massif, Italy). American Mineralogist, 2008, 93(10): 1519-1529.

Schaltegger U, Fanning C M, Günther D, . Growth, Annealing and Recrystallization of Zircon and Preservation of Monazite in High-Grade Metamorphism: Conventional and in-situ U-Pb Isotope, Cathodoluminescence and Microchemical Evidence. Contributions to Mineralogy and Petrology, 1999, 134(2/3): 186-201.

Schulz B, Klemd R, Brätz H. Host Rock Compositional Controls on Zircon Trace Element Signatures in Metabasites from the Austroalpine Basement. Geochimica et Cosmochimica Acta, 2006, 70(3): 697-710.

Sun S S, McDonough W F. Chemical and Isotopic Systematics of Oceanic Basalts: Implications for Mantle Composition and Processes. Geological Society, London, Special Publications, 1989, 42(1): 313-345.

Vavra G, Gebauer D, Schmid R, . Multiple Zircon Growth and Recrystallization during Polyphase Late Carboniferous to Triassic Metamorphism in Granulites of the Ivrea Zone (Southern Alps): An Ion Microprobe (SHRIMP) Study. Contributions to Mineralogy and Petrology, 1996, 122(4): 337-358.

Vavra G, Schmid R, Gebauer D. Internal Morphology, Habit and U-Th-Pb Microanalysis of Amphibolite-to-Granulite Facies Zircons: Geochronology of the Ivrea Zone (Southern Alps). Contributions to Mineralogy and Petrology, 1999, 134(4): 380-404.

Vonlanthen P, Fitz Gerald J D, Rubatto D, . Recrystallization Rims in Zircon (Valle d’ Arbedo, Switzerland): An Integrated Cathodoluminescence, LA-ICP-MS, SHRIMP, and TEM Study. American Mineralogist, 2012, 97(2/3): 369-377.

Watson E B, Wark D A, Thomas J B. Crystallization Thermometers for Zircon and Rutile. Contributions to Mineralogy and Petrology, 2006, 151(4): 413-433.

Wiedenbeck M, Allé P, Corfu F, . Three Natural Zircon Standards for U-Th-Pb, Lu-Hf, Trace Element and Ree Analyses. Geostandards and Geoanalytical Research, 1995, 19(1): 1-23.

Wu Y B, Zheng Y F. Genesis of Zircon and Its Constraints on Interpretation of U-Pb Age. Chinese Science Bulletin, 2004, 49(15): 1554-1569.

Wu Y B, Zheng Y F, Zhao Z F, . U-Pb, Hf and O Isotope Evidence for Two Episodes of Fluid-Assisted Zircon Growth in Marble-Hosted Eclogites from the Dabie Orogen. Geochimica et Cosmochimica Acta, 2006, 70(14): 3743-3761.

Xu H J, Ye K, Song Y R, . Prograde Metamorphism, Decompressional Partial Melting and Subsequent Melt Fractional Crystallization in the Weihai Migmatitic Gneisses, Sulu UHP Terrane, Eastern China. Chemical Geology, 2013, 341: 16-37.

Ye K, Yao Y P, Katayama I, . Large Areal Extent of Ultrahigh-Pressure Metamorphism in the Sulu Ultrahigh-Pressure Terrane of East China: New Implications from Coesite and Omphacite Inclusions in Zircon of Granitic Gneiss. Lithos, 2000, 52(1/2/3/4): 157-164.

Zhang R Y, Liou J G, Ernst W G. The Dabie-Sulu Continental Collision Zone: A Comprehensive Review. Gondwana Research, 2009, 16(1): 1-26.

Zheng Y F, Zhou J B, Wu Y B, . Low-Grade Metamorphic Rocks in the Dabie-Sulu Orogenic Belt: A Passive-Margin Accretionary Wedge Deformed during Continent Subduction. International Geology Review, 2005, 47(8): 851-871.

Zhu Y F, Massonne H J, Zhu M F. Petrology of Low-Temperature, Ultrahigh-Pressure Marbles and Interlayered Coesite Eclogites near Sanqingge, Sulu Terrane, Eastern China. Mineralogical Magazine, 2009, 73(2): 307-332.

Zong K Q, Liu Y S, Gao C G, . In situ U-Pb Dating and Trace Element Analysis of Zircons in Thin Sections of Eclogite: Refining Constraints on the Ultra High-Pressure Metamorphism of the Sulu Terrane, China. Chemical Geology, 2010, 269(3/4): 237-251.