An FTIR Study of Kyanite in the Maobei Kyanite-Bearing Eclogites from the Sulu Orogenic Belt, Eastern China

Abstract

As a minor phase, kyanite has been repeatedly shown to have experienced ultrahigh pressure (UHP) metamorphism together with its host eclogites. Thus, it could play some role in transporting water into the deep earth. Here we present a detailed investigation of water concentrations of kyanite, and for reference, of garnet and omphacite from four Maobei eclogites in the Sulu orogenic belt, eastern China. Fourier transform infrared (FTIR) measurements show that kyanites, garnets, and omphacites all have distinct hydroxyl absorption bands due to OH groups bound in their crystal structure. The FTIR profile analyses on ten grains from different samples reveal a homogeneous distribution of water across kyanite, suggesting insignificant water loss during exhumation. The calculated water concentrations in kyanite (21 wt ppm–41 wt ppm) are comparable to those reported previously for kyanite from various geological occurrences when using the most recent calibration. They are however much lower compared with those in garnet (46 wt ppm–83 wt ppm) and omphacite (302 wt ppm–548 wt ppm) from the Maobei eclogites. This implies that kyanite is not a major water carrier in eclogites considering its low volume fraction and contributes negligibly to transport water into the deep mantle accompanying subducted oceanic crust until its possible transformation to AlSiO₃OH.

Keywords

kyanite / water contents / eclogite / Sulu orogenic belt

References

[1] Aines R. D., Rossman G. R. The Hydrous Component in Garnet: Pyralspites. American Mineralogist, 1984, 69: 1116-1126.

[2] Beane R. J., Field C. K. Kyanite Deformation in Whiteschist of the Ultrahigh-Pressure Metamorphic Kokchetav Massif, Kazakhstan. Journal of Metamorphic Geology, 2007, 25(2): 117-128.

[3] Bell D. R., Rossman G. R. Water in Earth’s Mantle: The Role of Nominally Anhydrous Minerals. Science, 1992, 255(5050): 1391-1397.

[4] Bell D. R., Ihinger P. D., Rossman G. R. Quantitative Analysis of Trace OH in Garnet and Pyroxenes. American Mineralogist, 1995, 80(5/6): 465-474.

[5] Bell D. R., Rossman G. R., Maldener J., . Hydroxide in Kyanite: A Quantitative Determination of the Absolute Amount and Calibration of the IR Spectrum. American Mineralogist, 2004, 89(7): 998-1003.

[6] Beran A., Götzinger M. A. The Quantitative IR Spectroscopic Determination of Structural OH Groups in Kyanites. Mineralogy and Petrology, 1987, 36(1): 41-49.

[7] Beran A., Langer K., Andrut M. Single Crystal Infrared Spectra in the Range of OH Fundamentals of Paragenetic Garnet, Omphacite and Kyanite in an Eklogitic Mantle Xenolith. Mineralogy and Petrology, 1993, 48: 257-268.

[8] Chen R. X., Zheng Y. F., Gong B., . Origin of Retrograde Fluid in Ultrahigh-Pressure Metamorphic Rocks: Constraints from Mineral Hydrogen Isotope and Water Content Changes in Eclogite-Gneiss Transitions in the Sulu Orogen. Geochimica et Cosmochimica Acta, 2007, 71(9): 2299-2325.

[9] Denis C. M. M., Alard O., Demouchy S. Water Content and Hydrogen Behaviour during Metasomatism in the Uppermost Mantle beneath Ray Pic Volcano (Massif Central, France). Lithos, 2015, 236/237: 256-274.

[10] Demouchy S., Jacobsen S. D., Gaillard F., . Rapid Magma Ascent Recorded by Water Diffusion Profiles in Mantle Olivine. Geology, 2006, 34(6): 429-432.

[11] Demouchy S., Ishikawa A., Tommasi A., . Characterization of Hydration in the Mantle Lithosphere: Peridotite Xenoliths from the Ontong Java Plateau as an Example. Lithos, 2015, 212–215: 189-201.

[12] Hollis J. A., Harley S. L., White R. W., . Preservation of Evidence for Prograde Metamorphism in Ultrahigh-Temperature, High-Pressure Kyanite-Bearing Granulites, South Harris, Scotland. Journal of Metamorphic Geology, 2006, 24(3): 263-279.

[13] Hu S. X., Sun J. G., Ling H. F., . The Lanshantou Kyanite-Bearing Eclogite with Coesite Inclusions in the Sulu Ultrahigh-Pressure Metamorphic Belt and Its PTt Path. Acta Geologica Sinica—English Edition, 2001, 75(4): 409-420.

[14] Huang J. X., Li P., Griffin W. L., . Water Contents of Roberts Victor Xenolithic Eclogites: Primary and Metasomatic Controls. Contributions to Mineralogy and Petrology, 2014, 168 6 1092

[15] Johnson E. A. Water in Nominally Anhydrous Crustal Minerals: Speciation, Concentration, and Geologic Significance. Reviews in Mineralogy and Geochemistry, 2006, 62(1): 117-154.

[16] Katayama I., Nakashima S. Hydroxyl in Clinopyroxene from the Deep Subducted Crust: Evidence for H₂O Transport into the Mantle. American Mineralogist, 2003, 88(1): 229-234.

[17] Katayama I., Nakashima S., Yurimoto H. Water Content in Natural Eclogite and Implication for Water Transport into the Deep Upper Mantle. Lithos, 2006, 86(3/4): 245-259.

[18] Klonowska I., Majka J., Janák M., . Pressure-Temperature Evolution of a Kyanite-Garnet Pelitic Gneiss from Åreskutan: Evidence of Ultra-High-Pressure Metamorphism of the Seve Nappe Complex, West-Central Jämtland, Swedish Caledonides. Geological Society, London, Special Publications, 2014, 390(1): 321-336.

[19] Koch-Müller M., Matsyuk S. S., Wirth R. Hydroxyl in Omphacites and Omphacitic Clinopyroxenes of Upper Mantle to Lower Crustal Origin beneath the Siberian Platform. American Mineralogist, 2004, 89(7): 921-931.

[20] Koch-Müller M., Abs-Wurmbach I., Rhede D., . Dehydration Experiments on Natural Omphacites: Qualitative and Quantitative Characterization by Various Spectroscopic Methods. Physics and Chemistry of Minerals, 2007, 34(9): 663-678.

[21] Konzett J., Libowitzky E., Hejny C., . Oriented Quartz+Calcic Amphibole Inclusions in Omphacite from the Saualpe and Pohorje Mountain Eclogites, Eastern Alps—An Assessment of Possible Formation Mechanisms Based on IR-and Mineral Chemical Data and Water Storage in Eastern Alpine Eclogites. Lithos, 2008, 106(3/4): 336-350.

[22] Kotková J., Janák M. UHP Kyanite Eclogite Associated with Garnet Peridotite and Diamond-Bearing Granulite, Northern Bohemian Massif. Lithos, 2015, 226: 255-264.

[23] Kovács I., Hermann J., O’Neill H. S. C., . Quantitative Absorbance Spectroscopy with Unpolarized Light: Part II. Experimental Evaluation and Development of a Protocol for Quantitative Analysis of Mineral IR Spectra. American Mineralogist, 2008, 93(5/6): 765-778.

[24] Li Z. X. A., Lee C. T. A., Peslier A. H., . Water Contents in Mantle Xenoliths from the Colorado Plateau and Vicinity: Implications for the Mantle Rheology and Hydration-Induced Thinning of Continental Lithosphere. Journal of Geophysical Research, 2008, 113 B9 B09210

[25] Liou J. G., Zhang R. Y. Occurrences of Intergranular Coesite in Ultrahigh-P Rocks from the Sulu Region, Eastern China; Implications for Lack of Fluid during Exhumation. American Mineralogist, 1996, 81(9/10): 1217-1221.

[26] Liu F. L., Xu Z. Q., Liou J. G., . SHRIMP^U-Pb Ages of Ultrahigh-Pressure and Retrograde Metamorphism of Gneisses, South-Western Sulu Terrane, Eastern China. Journal of Metamorphic Geology, 2004, 22(4): 315-326.

[27] Matsyuk S. S., Langer K., Hösch A. Hydroxyl Defects in Garnets from Mantle Xenoliths in Kimberlites of the Siberian Platform. Contributions to Mineralogy and Petrology, 1998, 132(2): 163-179.

[28] Peslier A., Luhr J. Hydrogen Loss from Olivines in Mantle Xenoliths from Simcoe (USA) and Mexico: Mafic Alkalic Magma Ascent Rates and Water Budget of the Sub-Continental Lithosphere. Earth and Planetary Science Letters, 2006, 242(3/4): 302-319.

[29] Rossman G. R., Smyth J. R. Hydroxyl Contents of Accessory Minerals in Mantle Eclogites and Related Rocks. American Mineralogist, 1990, 75: 765-780.

[30] Sambridge M., Gerald J. F., Kovacs I., . Quantitative Absorbance Spectroscopy with Unpolarized Light: Part I. Physical and Mathematical Development. American Mineralogist, 2008, 93(5/6): 751-764.

[31] Schmidt M. W., Finger L. W., Angel R. J., . Synthesis, Crystal Structure, and Phase Relations of AlSiO₃OH, a High-Pressure Hydrous Phase. American Mineralogist, 1998, 83(7/8): 881-888.

[32] Sheng Y. M., Xia Q.-K., Dallai L., . H₂O Contents and D/H Ratios of Nominally Anhydrous Minerals from Ultrahigh-Pressure Eclogites of the Dabie Orogen, Eastern China. Geochimica et Cosmochimica Acta, 2007, 71(8): 2079-2103.

[33] Skogby H., Janák M., Broska I. Water Incorporation in Omphacite: Concentrations and Compositional Relations in Ultrahigh-Pressure Eclogites from Pohorje, Eastern Alps. European Journal of Mineralogy, 2016, 28(3): 631-639.

[34] Su W., You Z. D., Cong B. L., . Cluster of Water Molecules in Garnet from Ultrahigh-Pressure Eclogite. Geology, 2002, 30 7 611

[35] Terry M. P., Robinson P., Ravna E. J. K. Kyanite Eclogite Thermobarometry and Evidence for Thrusting of UHP over HP Metamorphic Rocks, Nordøyane, Western Gneiss Region, Norway. American Mineralogist, 2000, 85(11/12): 1637-1650.

[36] Tian Z. Z., Liu J., Xia Q.-K., . Water Concentration Profiles in Natural Mantle Orthopyroxenes: A Geochronometer for Long Annealing of Xenoliths within Magma. Geology, 2017, 45(1): 87-90.

[37] Wang Y. F., Ren H. P., Jin Z. M. Water and Fabric in an Ophiolitic Peridotite from a Supra-Subduction Zone. Contributions to Mineralogy and Petrology, 2016, 171 3 22

[38] Wieczorek A., Libowitzky E., Beran A. A Model for the OH Incorporation in Kyanite Based on Polarised IR Spectroscopic Investigations. Schweizerische Mineralogische und Petrographische Mitteilungen, 2004, 84: 333-343.

[39] Wilkins R. W. T., Sabine W. Water Content of Some Nominally Anhydrous Silicates. American Mineralogist, 1973, 58: 508-516.

[40] Withers A. C. On the Use of Unpolarized Infrared Spectroscopy for Quantitative Analysis of Absorbing Species in Birefringent Crystals. American Mineralogist, 2013, 98(4): 689-697.

[41] Withers A. C., Wood B. J., Carroll M. R. The^OH Content of Pyrope at High Pressure. Chemical Geology, 1998, 147(1/2): 161-171.

[42] Xia Q.-K., Sheng Y. M., Yang X. Z., . Heterogeneity of Water in Garnets from UHP Eclogites, Eastern Dabieshan, China. Chemical Geology, 2005, 224(4): 237-246.

[43] Xia Q.-K., Hao Y. T., Li P., . Low Water Content of the Cenozoic Lithospheric Mantle beneath the Eastern Part of the North China Craton. Journal of Geophysical Research, 2010, 115 B7 B07207

[44] Zhang J. F., Green H. W. I. Experimental Investigation of Eclogite Rheology and Its Fabrics at High Temperature and Pressure. Journal of Metamorphic Geology, 2007, 25(2): 97-115.

[45] Zhang R. Y., Hirajima T., Banno S., . Petrology of Ultrahigh-Pressure Rocks from the Southern Su-Lu Region, Eastern China. Journal of Metamorphic Geology, 1995, 13(6): 659-675.

[46] 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.

[47] Zhang Z. M., Liou J. G., Zhao X. D., . Petrogenesis of Maobei Rutile Eclogites from the Southern Sulu Ultrahigh-Pressure Metamorphic Belt, Eastern China. Journal of Metamorphic Geology, 2006, 24(8): 727-741.

[48] Zheng Y. F., Fu B., Gong B., . Stable Isotope Geochemistry of Ultrahigh Pressure Metamorphic Rocks from the Dabie-Sulu Orogen in China: Implications for Geodynamics and Fluid Regime. Earth-Science Reviews, 2003, 62(1/2): 105-161.