Investigating low dispersion isotope dissolution Lu-Hf garnet dates via in situ Lu-Hf geochronology, Kanchenjunga Himal

Abstract

Re-examination of three specimens from the Kanchenjunga Himal of Nepal via in situ Lu-Hf garnet geochronology yields evidence of multiple garnet growth events. Spot analyses from grain cores in two specimens define Paleozoic regressions whereas analyses from grain rims in the same specimens define low-precision regressions consistent with the timing of Himalayan orogenesis. These dates contrast with previously published low dispersion, ca. 290 Ma isotope dissolution (ID) Lu-Hf garnet dates for the same rocks. Modelling of Lu and spot age distribution in representative grains from the specimens examined yields calculated dates that approximate the Permian-age regressions through the original ID data. These findings demonstrate that it is possible to generate low dispersion ID Lu-Hf data from multi-generational garnet with significantly different-age growth events when approximately equal proportions of the different age reservoirs are included in multi-component aliquots.

Keywords

Lu-Hf geochronology / In situ Lu-Hf geochronology / Kanchenjunga Himal

CRediT authorship contribution statement

Kyle P. Larson: Conceptualization, Methodology, Software, Writing – original draft, Visualization, Data curation, Investigation. John M. Cottle: Writing – review & editing, Investigation, Conceptualization. Mark Button: Writing – review & editing, Methodology, Data curation. Brendan Dyck: Writing – review & editing, Investigation. Iva Lihter: Writing – review & editing, Visualization. Sudip Shrestha: Writing – review & editing, Visualization.

Declaration of competing interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Acknowledgements

This work was supported by a Natural Sciences and Engineering Research Council (Canada) Discovery Grant to K. Larson. Lu-Hf age modelling benefitted from discussions with A. Camacho. J. Garber, A. Simpson, E. Baxter, one anonymous reviewer and Associate Editor S. Glorie are thanked for their constructive insight during the review process. Supplementary materials are openly available via the Open Science Foundation: https://osf.io/h4rx9/?view_only=bdb952001c224b8b91aac110ee23fed0.

References

T.K. Ambrose, K.P. Larson, C. Guilmette, J.M. Cottle, H. Buckingham, S. Rai. Lateral extrusion, underplating, and out-of-sequence thrusting within the Himalayan metamorphic core, Kanchenjunga, Nepal. Lithosphere, 7 (2015), pp. 441-464

E.F. Baxter, E.E. Scherer. Garnet geochronology: Timekeeper of tectonometamorphic processes. Elements (Que.), 9 (2013), pp. 433-438

R.G. Berman, J.A. Cutts, W.J. Davis, A. Camacho, M. Sanborn-Barrie, M.A. Smit. The tectonic evolution of Thelon tectonic zone, Canada: a new model based on petrological modeling linked with Lu–Hf garnet and U-Pb accessory mineral geochronology. Can. J. Earth Sci., 60 (2023), pp. 550-582

L. Bickerton, D.J. Kontak, J.B. Murphy, D.A. Kellett, I.M. Samson, J.H. Marsh, G. Dunning, R. Stern. The age and origin of the South Mountain Batholith (Nova Scotia, Canada) as constrained by zircon U-Pb geochronology, geochemistry, and O–Hf isotopes. Can. J. Earth Sci., 59 (2022), pp. 418-454

E.M. Bloch, M.C. Jollands, A. Devoir, A.-S. Bouvier, M. Ibañez-Mejia, L.P. Baumgartner. Multispecies diffusion of yttrium, rare earth elements and hafnium in garnet. J. Petrol., 61(7), egaa055 (2020),

W. Compston, I.S. Williams, C. Meyer. U-Pb geochronology of zircons from lunar breccia 73217 using a sensitive high mass-resolution ion microprobe. J. Geophys. Res., 89 (1984), p. B525

J.M. Cottle, K.P. Larson, D.A. Kellett. How does the mid-crust accommodate deformation in large, hot collisional orogens? A review of recent research in the Himalayan orogen. J. Struct. Geol., 78 (2015), pp. 119-133

J.A. Cutts, M.A. Smit. Rates of deep continental burial from Lu-Hf garnet chronology and Zr-in-rutile thermometry on (ultra)high-pressure rocks. Tectonics, 37 (1) (2018), pp. 71-88,

J. de Sigoyer, V. Chavagnac, J. Blichert-Toft, I.M. Villa, B. Luais, S. Guillot, M. Cosca, G. Mascle. Dating the Indian continental subduction and collisional thickening in the northwest Himalaya: Multichronology of the Tso Morari eclogites. Geology, 28 (2000), pp. 487-490

S. Duchêne, J. Blichert-Toft, B. Luais, P. Télouk, J.-M. Lardeaux, F. Albarède. The Lu–Hf dating of garnets and the ages of the Alpine high-pressure metamorphism. Nature, 387 (1997), pp. 586-589

B. Dyck, K.P. Larson. Metasomatic origin of the Himalayan banded tourmaline leucogranite. Contrib. Mineral. Petrol., 178 (2023), p. 37

S. Faisal, K.P. Larson, J.M. Cottle, J.L. Lamming. Building the Hindu Kush: monazite records of terrane accretion, plutonism and the evolution of the Himalaya–Karakoram–Tibet orogen. Terra Nova, 26 (2014), pp. 395-401

C.M. Fisher, J.D. Vervoort. Using the magmatic record to constrain the growth of continental crust—The Eoarchean zircon Hf record of Greenland. Earth Planet. Sci. Lett., 488 (2018), pp. 79-91

G.L. Foster, R.R. Parrish, M.S.A. Horstwood, S. Chenery, J. Pyle, H.D. Gibson. The generation of prograde P-T–t points and paths; a textural, compositional, and chronological study of metamorphic monazite. Earth Planet. Sci. Lett., 228 (2004), pp. 125-142

B. Goscombe, D. Gray, M. Hand. Crustal architecture of the Himalayan metamorphic front in eastern Nepal. Gondwana Res., 10 (2006), pp. 232-255

C. Guilmette, M.A. Smit, D.J.J. van Hinsbergen, D. Gürer, F. Corfu, B. Charette, M. Maffione, O. Rabeau, D. Savard. Forced subduction initiation recorded in the sole and crust of the Semail Ophiolite of Oman. Nat. Geosci., 11 (2018), pp. 688-695

D. Herwartz, T.J. Nagel, C. Münker, E.E. Scherer, N. Froitzheim. Tracing two orogenic cycles in one eclogite sample by Lu–Hf garnet chronometry. Nat. Geosci., 4 (2011), pp. 178-183

M.S.A. Horstwood, G.L. Foster, R.R. Parrish, S.R. Noble, G.M. Nowell. Common-Pb corrected in situ U-Pb accessory mineral geochronology by LA-MC-ICP-MS. J. Anal. At. Spectrom., 18 (2003), pp. 837-846

T. Imayama. P-T conditions of metabasites within regional metapelites in far-eastern Nepal Himalaya and its tectonic meaning. Swiss J. Geosci., 107 (2014), pp. 81-99

T. Imayama, K. Suzuki. Carboniferous inherited grain and age zoning of monazite and xenotime from leucogranites in far-eastern Nepal: constraints from electron probe microanalysis. Am. Mineral., 98 (2013), pp. 1393-1406

T. Imayama, T. Takeshita, K. Arita. Metamorphic P-T profile and P-T path discontinuity across the far-eastern Nepal Himalaya: investigation of channel flow models. J. Metamorph. Geol., 28 (2010), pp. 527-549

T. Imayama, T. Takeshita, K. Yi, D.-L. Cho, K. Kitajima, Y. Tsutsumi, M. Kayama, H. Nishido, T. Okumura, K. Yagi, T. Itaya, Y. Sano. Two-stage partial melting and contrasting cooling history within the Higher Himalayan Crystalline Sequence in the far-eastern Nepal Himalaya. Lithos, 134–135 (2012), pp. 1-22

T. Imayama, T. Takeshita, K. Yi, M. Fukuyama. Early Oligocene partial melting via biotite dehydration melting and prolonged low-pressure–low-temperature metamorphism of the upper High Himalaya Crystalline Sequence in the far east of Nepal. Geolo. Soc. London Spec. Publ., 481 (SP481) (2018), p. 2

K.P. Jochum, U. Weis, B. Stoll, D. Kuzmin, Q. Yang, I. Raczek, D.E. Jacob, A. Stracke, K. Birbaum, D.A. Frick, D. Günther, J. Enzweiler. Determination of reference values for NIST SRM 610–617 glasses following ISO guidelines. Geostand. Geoanal. Res., 35 (2011), pp. 397-429

T.A. Johnson, J.M. Cottle, K.P. Larson. Delineation of multiple metamorphic events in the Himalayan Kathmandu Complex, central Nepal. J. Metamorph. Geol., 39 (2021), pp. 443-472

C. Kavanagh-Lepage, F. Gervais, K. Larson, R. Graziani, A. Moukhsil. Deformation induced decoupling between U-Pb and trace elements in titanite revealed through petrochronology and study of localized deformation. Geosci. Front., 14 (2023), Article 101496

M.J. Kohn. Models of garnet differential geochronology. Geochim. Cosmochim. Acta, 73 (2009), pp. 170-182

A.R.C. Kylander-Clark, B.R. Hacker, C.M. Johnson, B.L. Beard, N.J. Mahlen, T.J. Lapen. Coupled Lu–Hf and Sm–Nd geochronology constrains prograde and exhumation histories of high- and ultrahigh-pressure eclogites from western Norway. Chem. Geol., 242 (2007), pp. 137-154

T.J. Lapen, C.M. Johnson, L.P. Baumgartner, N.J. Mahlen, B.L. Beard, J.M. Amato. Burial rates during prograde metamorphism of an ultra-high-pressure terrane: an example from Lago di Cignana, western Alps, Italy. Earth Planet. Sci. Lett., 215 (2003), pp. 57-72

K.P. Larson, S. Shrestha, J.M. Cottle, C. Guilmette, T.A. Johnson, H.D. Gibson, F. Gervais. Re-evaluating monazite as a record of metamorphic reactions. Geosci. Front., 13 (2022), Article 101340

I. Lihter, K.P. Larson, M.A. Smit, J.M. Cottle, K.T. Ashley, S. Shrestha. Decrypting the polymetamorphic record of the Himalaya. Geology, 50 (2022), pp. 588-592

A.J. Martin, G.E. Gehrels, P.G. DeCelles. The tectonic significance of (U, Th)/Pb ages of monazite inclusions in garnet from the Himalaya of central Nepal. Chem. Geol., 244 (2007), pp. 1-24

A.C. Moser, B.R. Hacker, G.E. Gehrels, G.G.E. Seward, A.R.C. Kylander-Clark, J.M. Garber. Linking titanite U-Pb dates to coupled deformation and dissolution–reprecipitation. Contrib. Mineral. Petrol., 177 (2022), p. 42

O. Nebel, M.L. Morel, P.Z. Vroon. Isotope dilution determinations of Lu, Hf, Zr, Ta and W, and Hf isotope compositions of NIST SRM 610 and 612 glass wafers. Geostand. Geoanal. Res., 33 (2009), pp. 487-499

J.E. Otamendi, J.D. de la Rosa, A.E. Patiño Douce, A. Castro. Rayleigh fractionation of heavy rare earths and yttrium during metamorphic garnet growth. Geology, 30 (2002), pp. 159-162

C. Paton, J. Hellstrom, B. Paul, J. Woodhead, J. Hergt. Iolite: Freeware for the visualisation and processsing of mass spectrometric data. J. Anal. At. Spectrom., 26 (2012), pp. 2508-2512

A. Pullen, M. Ibáñez-Mejia, G.E. Gehrels, D. Giesler, M. Pecha. Optimization of a laser ablation-single collector-inductively coupled plasma-mass spectrometer (Thermo element 2) for accurate, precise, and efficient zircon U-Th-Pb geochronology. Geochem. Geophys. Geosyst., 19 (2018), pp. 3689-3705

R Core Team. R: A Language and Environment for Statistical Computing. R Foundation for Statistical Computing (2023)

R.L. Romer, S.-A. Smeds. U-Pb columbite ages of pegmatites from Sveconorwegian terranes in southwestern Sweden. Precambr. Res., 76 (1996), pp. 15-30

E.E. Scherer, K.L. Cameron, C.M. Johnson, B.L. Beard, K.M. Barovich, K.D. Collerson. Lu Hf geochronology applied to dating Cenozoic events affecting lower crustal xenoliths from Kilbourne Hole, New Mexico. Chem. Geol., 142 (1997), pp. 63-78

S. Shrestha, K.P. Larson, E. Duesterhoeft, M. Soret, J.M. Cottle. Thermodynamic modelling of phosphate minerals and its implications for the development of P-T-t histories: a case study in garnet - monazite bearing metapelites. Lithos, 334–335 (2019), pp. 141-160

A. Simpson, S. Gilbert, R. Tamblyn, M. Hand, C. Spandler, J. Gillespie, A. Nixon, S. Glorie. In-situ Lu-Hf geochronology of garnet, apatite and xenotime by LA ICP MS/MS. Chem. Geol., 577 (2021), Article 120299

A. Simpson, S. Glorie, M. Hand, C. Spandler, S. Gilbert, B. Cave. In situ Lu–Hf geochronology of calcite. Geochronology, 4 (2022), pp. 353-372

A. Simpson, S. Glorie, M. Hand, C. Spandler, S. Gilbert. Garnet Lu-Hf speed dating: a novel method to rapidly resolve polymetamorphic histories. Gondwana Res., 121 (2023), pp. 215-234,

M. Smit, B.R. Hacker, J. Lee. Tibetan garnet records early Eocene initiation of thickening in the Himalaya. Geology, 42 (2014), pp. 591-594

M.A. Smit, E.E. Scherer, M. Bröcker, H.L.M. van Roermund. Timing of eclogite facies metamorphism in the southernmost Scandinavian Caledonides by Lu–Hf and Sm–Nd geochronology. Contrib. Mineral. Petrol., 159 (2010), pp. 521-539

M. Soret, K.P. Larson, J.M. Cottle, M. Smit, A. Johnson, S. Shrestha, A. Ali, S. Faisal. Mesozoic to Cenozoic tectono-metamorphic history of the South Pamir-Hindu Kush (Chitral, NW Pakistan): insights from phase equilibria modelling, and garnet–monazite petrochronology. J. Metamorph. Geol., 118 (2019), pp. 1-34

F.S. Spear, J.M. Pyle. Apatite, monazite, and xenotime in metamorphic rocks. Rev. Mineral. Geochem., 48 (2002), p. 293

C.J. Spencer, C.L. Kirkland, N.M.W. Roberts, N.J. Evans, J. Liebmann. Strategies towards robust interpretations of in situ zircon Lu–Hf isotope analyses. Geosci. Front., 11 (2020), pp. 843-853

E.J. Thiessen, H. Daniel Gibson, D. Regis, S.J. Pehrsson, J.A. Cutts, M.A. Smit. High-grade metamorphism flying under the radar of accessory minerals. Geology, 47 (2019), pp. 568-572

L. Tual, M.A. Smit, J. Cutts, E. Kooijman, M. Kielman-Schmitt, J. Majka, I. Foulds. Rapid, paced metamorphism of blueschists (Syros, Greece) from laser-based zoned Lu-Hf garnet chronology and LA-ICPMS trace element mapping. Chem. Geol., 607 (2022), Article 121003

J.B. Walters, A.M. Cruz-Uribe, W.J. Song, C. Gerbi, K. Biela. Strengths and limitations of in situ U-Pb titanite petrochronology in polymetamorphic rocks: an example from western Maine, USA. J. Metamorph. Geol., 40 (6) (2022), pp. 1043-1066,

I. Wendt, C. Carl. The statistical distribution of the mean squared weighted deviation. Chem. Geol.: Isotope Geosci. Sect., 86 (1991), pp. 275-285

Woods. . Resolution of 176Yb and 176Lu Interferences on 176Hf to Enable Accurate 176Hf/177Hf Isotope Ratio Analysis Using an Agilent 8800 ICP-QQQ with MS/MS, Agilent Technologies, USA (2017)

C. Yakymchuk, M. Brown. Behaviour of zircon and monazite during crustal melting. J. Geol. Soc. London, 171 (2014), pp. 465-479