Skip to main content Accessibility help

Origin and tectonic evolution of the NE basement of Oman: a window into the Neoproterozoic accretionary growth of India?



The Omani basement is located spatially distant from the dominantly juvenile Arabian–Nubian Shield (ANS) to its west, and its relationship to the amalgamation of those arc terranes has yet to be properly constrained. The Jebel Ja'alan (NE Oman) basement inlier provides an excellent opportunity to better understand the Neoproterozoic tectonic geography of Oman and its relationship to the ANS. To understand the origin of this basement inlier, we present new radiogenic isotopic data from igneous bodies in Jebel Ja'alan. U–Pb and 40Ar/39Ar geochronological data are used to constrain the timing of magmatism and metamorphism in the jebel. Positive εHf and εNd values indicate a juvenile origin for the igneous lithologies. Phase equilibria modelling is used to constrain the metamorphic conditions recorded by basement. Pressure–temperature (PT) pseudosections show that basement schists followed a clockwise P–T path, reaching peak metamorphic conditions of c. 650–700°C at 4–7.5 kbar, corresponding to a thermal gradient of c. 90–160°C/kbar. From the calculated thermal gradient, in conjunction with collected trace-element data, we interpret that the Jebel Ja'alan basement formed in an arc environment. Geochronological data indicate that this juvenile arc formed during Tonian time and is older than basement further west in Oman. We argue that the difference in timing is related to westwards arc accretion and migration, which implies that the Omani basement represents its own tectonic domain separate to the ANS and may be the leading edge of the Neoproterozoic accretionary margin of India.


Corresponding author

Author for correspondence:


Hide All
Abu-Alam, T., Hassan, M., Stüwe, K., Meyer, S. & Passchier, C. 2014. Multistage tectonism and metamorphism during Gondwana Collision: Baladiyah Complex, Saudi Arabia. Journal of Petrology 55 (10), 1941–64.
Abu El-Enen, M. M. 2011. Geochemistry, provenance, and metamorphic evolution of Gabal Samra Neoproterozoic metapelites, Sinai, Egypt. Journal of African Earth Sciences 59 (2–3), 269–82.
Allen, P. A. 2007. The Huqf Supergroup of Oman: basin development and context for Neoproterozoic glaciation. Earth-Science Reviews 84 (3), 139–85.
Allen, P. A., Leather, J. & Brasier, M. D. 2004. The Neoproterozoic Fiq glaciation and its aftermath, Huqf supergroup of Oman. Basin Research 16 (4), 507–34.
Allen, P. A., Leather, J., Brasier, M. D., Rieu, R., McCarron, M., le Guerroué, E., Etienne, J. L. & Cozzi, A. 2011. The Abu Mahara Group (Ghubrah and Fiq formations), Jabal Akhdar, Oman. In The Geological Record of Neoproterozoic Glaciations (eds Arnaud, E., Halverson, G. P. & Shields, G.), pp. 251–62. Geological Society of London, Memoir no. 36(1).
Allmendinger, R. W., Cardozo, N. & Fisher, D. M. 2011. Structural Geology Algorithms: Vectors and Tensors. Cambridge: Cambridge University Press.
Ashwal, L., Solanki, A., Pandit, M., Corfu, F., Hendriks, B., Burke, K. & Torsvik, T. 2013. Geochronology and geochemistry of Neoproterozoic Mt. Abu granitoids, NW India: regional correlation and implications for Rodinia paleogeography. Precambrian Research 236, 265–81.
Baier, J., Audétat, A. & Keppler, H. 2008. The origin of the negative niobium tantalum anomaly in subduction zone magmas. Earth and Planetary Science Letters 267 (1–2), 290300.
Bard, J. P. 1983. Metamorphism of an obducted island arc: example of the Kohistan sequence (Pakistan) in the Himalayan collided range. Earth and Planetary Science Letters 65 (1), 133–44.
Be'eri-Shlevin, Y., Eyal, M., Eyal, Y., Whitehouse, M. J. & Litvinovsky, B. 2012. The Sa'al volcano-sedimentary complex (Sinai, Egypt): a latest Mesoproterozoic volcanic arc in the northern Arabian Nubian Shield. Geology 40 (5), 403–6.
Blades, M. L., Collins, A. S., Foden, J., Payne, J. L., Xu, X., Alemu, T., Woldetinsae, G., Clark, C. & Taylor, R. J. 2015. Age and hafnium isotopic evolution of the Didesa and Kemashi domains, western Ethiopia. Precambrian Research 270, 267–84.
Bowring, S. A., Grotzinger, J. P., Condon, D. J., Ramezani, J., Newall, M. J. & Allen, P. A. 2007. Geochronologic constraints on the chronostratigraphic framework of the Neoproterozoic Huqf Supergroup, Sultanate of Oman. American Journal of Science 307 (10), 1097–145.
Brown, M. 2007. Metamorphic conditions in orogenic belts: a record of secular change. International Geology Review 49 (3), 193234.
Buick, I., Allen, C., Pandit, M., Rubatto, D. & Hermann, J. 2006. The Proterozoic magmatic and metamorphic history of the Banded Gneiss Complex, central Rajasthan, India: LA-ICP-MS U–Pb zircon constraints. Precambrian Research 151 (1), 119–42.
Cardozo, N. & Allmendinger, R. W. 2013. Spherical projections with OSXStereonet. Computers & Geosciences 51, 193205.
Collins, A. S. 2006. Madagascar and the amalgamation of Central Gondwana. Gondwana Research 9 (1), 316.
Collins, A. S. & Pisarevsky, S. A. 2005. Amalgamating eastern Gondwana: the evolution of the Circum-Indian Orogens. Earth-Science Reviews 71 (3), 229–70.
Corfu, F., Hanchar, J. M., Hoskin, P. W. & Kinny, P. 2003. Atlas of zircon textures. Reviews in mineralogy and geochemistry 53 (1), 469500.
Corrie, S. L. & Kohn, M. J. 2008. Trace-element distributions in silicates during prograde metamorphic reactions: Implications for monazite formation. Journal of Metamorphic Geology 26 (4), 451–64.
Cox, G. M., Lewis, C. J., Collins, A. S., Halverson, G. P., Jourdan, F., Foden, J., Nettle, D. & Kattan, F. 2012. Ediacaran terrane accretion within the Arabian–Nubian Shield. Gondwana Research 21 (2), 341–52.
Cozzi, A., Rea, G. & Craig, J. 2012. From global geology to hydrocarbon exploration: Ediacaran-Early Cambrian petroleum plays of India, Pakistan and Oman. In Geology and Hydrocarbon Potential of Neoproterozoic–Cambrian Basins in Asia (eds Bhat, G. M., Craig, J., Thurrow, J. W., Thusu, B. & Cozzi, A.), pp, 131–62. Geological Society of London, Special Publication no. 366.
Davies, R. & Crawford, A. 1971. Petrography and age of the rocks of Bulland Hill, Kirana Hills, Sarghoda District, west Pakistan. Geological Magazine 108 (03), 235–46.
Davis, J. K., Meert, J. G. & Pandit, M. K. 2014. Paleomagnetic analysis of the Marwar Supergroup, Rajasthan, India and proposed interbasinal correlations. Journal of Asian Earth Sciences 91, 339–51.
Deb, M., Thorpe, R., Krstic, D., Corfu, F. & Davis, D. 2001. Zircon U–Pb and galena Pb isotope evidence for an approximate 1.0 Ga terrane constituting the western margin of the Aravalli–Delhi orogenic belt, northwestern India. Precambrian Research 108 (3), 195213.
Denèle, Y., Leroy, S., Pelleter, E., Pik, R., Talbot, J.-Y. & Khanbarri, K. 2013. The Cryogenian arc formation and successive high-K calc-alkaline plutons of Socotra Island (Yemen). In Lithosphere Dynamics and Sedimentary Basins: The Arabian Plate and Analogues (eds Hosani, K. A., Roure, F., Ellison, R. & Lokier, S.), pp. 335–60. Berlin, Heidelberg: Springer.
Dhuime, B., Hawkesworth, C. & Cawood, P. 2011. When continents formed. Science 331 (6014), 154–5.
Diener, J. & Powell, R. 2010. Influence of ferric iron on the stability of mineral assemblages. Journal of Metamorphic Geology 28 (6), 599613.
Doebrich, J. L., Al-Jehani, A. M., Siddiqui, A. A., Hayes, T. S., Wooden, J. L. & Johnson, P. R. 2007. Geology and metallogeny of the Ar Rayn terrane, eastern Arabian shield: evolution of a Neoproterozoic continental-margin arc during assembly of Gondwana within the East African Orogen. Precambrian Research 158 (1), 1750.
Elburg, M. & Foden, J. 1998. Temporal changes in arc magma geochemistry, northern Sulawesi, Indonesia. Earth and Planetary Science Letters 163 (1), 381–98.
Faryad, S. W., Collett, S., Finger, F., Sergeev, S. A., Čopjaková, R. & Siman, P. 2016. The Kabul Block (Afghanistan), a segment of the Columbia Supercontinent, with a Neoproterozoic metamorphic overprint. Gondwana Research 34, 221–40.
Filbrandt, J., Nolan, S. & Ries, A. 1990. Late Cretaceous and early Tertiary evolution of Jebel Ja'alan and adjacent areas, NE Oman. In The Geology and Tectonics of the Oman Region (eds Robertson, A. H. F., Searle, M. P. & Reis, A. C.), pp. 697714. Geological Society of London, Special Publication no. 49.
Fitton, J. & Gill, R. 1970. The oxidation of ferrous iron in rocks during mechanical grinding. Geochimica et Cosmochimica Acta 34 (4), 518–24.
Fritz, H., Dallmeyer, D. R., Wallbrecher, E., Loizenbauer, J., Hoinkes, G., Neumayr, P. & Khudeir, A. A. 2002. Neoproterozoic tectonothermal evolution of the Central Eastern Desert, Egypt: a slow velocity tectonic process of core complex exhumation. Journal of African Earth Sciences 34 (3–4), 137–55.
Gass, I., Ries, A., Shackleton, R. & Smewing, J. 1990. Tectonics, geochronology and geochemistry of the Precambrian rocks of Oman. In The Geology and Tectonics of the Oman Region (eds Robertson, A. H. F., Searle, M. P. & Reis, A. C.), pp. 585–99. Geological Society of London, Special Publication no. 49.
Goldstein, S., O'nions, R. & Hamilton, P. 1984. A Sm-Nd isotopic study of atmospheric dusts and particulates from major river systems. Earth and Planetary Science Letters 70 (2), 221–36.
Gregory, L. C., Meert, J. G., Bingen, B., Pandit, M. K. & Torsvik, T. H. 2009. Paleomagnetism and geochronology of the Malani Igneous Suite, Northwest India: implications for the configuration of Rodinia and the assembly of Gondwana. Precambrian Research 170 (1), 1326.
Griffin, W., Wang, X., Jackson, S., Pearson, N., O'Reilly, S. Y., Xu, X. & Zhou, X. 2002. Zircon chemistry and magma mixing, SE China: in-situ analysis of Hf isotopes, Tonglu and Pingtan igneous complexes. Lithos 61 (3), 237–69.
Haldar, S. & Deb, M. 2001. Geology and mineralization of Rajpura-Dariba lead-zinc belt, Rajasthan. In Sediment-hosted Lead-Zink Deposit Modeling Program (eds Deb, M. & Goodfellow, W. D.), pp. 177–87. New Delhi: Delhi-Udaipur, Elsevier.
Halverson, G. P., Hurtgen, M. T., Porter, S. M. & Collins, A. S. 2009. Neoproterozoic-Cambrian biogeochemical evolution. Developments in Precambrian Geology 16, 351–65.
Hames, W. & Bowring, S. 1994. An empirical evaluation of the argon diffusion geometry in muscovite. Earth and Planetary Science Letters 124 (1), 161–9.
Harrison, T. M., Célérier, J., Aikman, A. B., Hermann, J. & Heizler, M. T. 2009. Diffusion of 40 Ar in muscovite. Geochimica et Cosmochimica Acta 73 (4), 1039–51.
Hawkesworth, C. & Kemp, A. 2006. Using hafnium and oxygen isotopes in zircons to unravel the record of crustal evolution. Chemical Geology 226 (3), 144–62.
Heikal, M. T. S., Al-Khirbash, S. A., Hassan, A. M., Al-Kotbah, A. M. & Al-Selwi, K. M. 2014. Lithostratigraphy, deformation history, and tectonic evolution of the basement rocks, Republic of Yemen: an overview. Arabian Journal of Geosciences 7 (5), 2007–18.
Hodges, K. 1991. Pressure-temperature paths. Annual Review of Earth and Planetary Sciences 19, 207.
Hoffman, P. F., Kaufman, A. J., Halverson, G. P. & Schrag, D. P. 1998. A Neoproterozoic snowball earth. Science 281 (5381), 1342–6.
Holland, T. & Powell, R. 2011. An improved and extended internally consistent thermodynamic dataset for phases of petrological interest, involving a new equation of state for solids. Journal of Metamorphic Geology 29 (3), 333–83.
Immenhauser, A., Schreurs, G., Gnos, E., Oterdoom, H. W. & Hartmann, B. 2000. Late Palaeozoic to Neogene geodynamic evolution of the northeastern Oman margin. Geological Magazine 137 (1), 118.
Jackson, S. E., Pearson, N. J., Griffin, W. L. & Belousova, E. A. 2004. The application of laser ablation-inductively coupled plasma-mass spectrometry to in situ U–Pb zircon geochronology. Chemical Geology 211 (1–2), 4769.
Jarrar, G. H., Theye, T., Yaseen, N., Whitehouse, M., Pease, V. & Passchier, C. 2013. Geochemistry and P–T–t evolution of the Abu-Barqa Metamorphic Suite, SW Jordan, and implications for the tectonics of the northern Arabian–Nubian Shield. Precambrian Research 239, 5678.
Johnson, P., Andresen, A., Collins, A., Fowler, A., Fritz, H., Ghebreab, W., Kusky, T. & Stern, R. 2011. Late Cryogenian–Ediacaran history of the Arabian–Nubian Shield: a review of depositional, plutonic, structural, and tectonic events in the closing stages of the northern East African Orogen. Journal of African Earth Sciences 61 (3), 167232.
Johnson, P. R. & Stewart, I. C. 1995. Magnetically inferred basement structure in central Saudi Arabia. Tectonophysics 245 (1), 3752.
Johnson, P. R. & Woldehaimanot, B. 2003. Development of the Arabian-Nubian Shield: perspectives on accretion and deformation in the northern East African Orogen and the assembly of Gondwana. In Proterozoic East Gondwana: Supercontinent Assembly and Breakup (eds Yoshida, M., Windley, B. E. & Dasgupta, S.), pp. 289325. Geological Society of London, Special Publication no. 206.
Just, J., Schulz, B., de Wall, H., Jourdan, F. & Pandit, M. K. 2011. Monazite CHIME/EPMA dating of Erinpura granitoid deformation: Implications for Neoproterozoic tectono-thermal evolution of NW India. Gondwana Research 19 (2), 402–12.
Kelsey, D. E. & Hand, M. 2015. On ultrahigh temperature crustal metamorphism: Phase equilibria, trace element thermometry, bulk composition, heat sources, timescales and tectonic settings. Geoscience Frontiers 6 (3), 311–56.
Kil, Y. & Jung, H. 2015. LA-ICP-MS analysis of natural rock samples using XRF glass beads. Geosciences Journal 19 (1), 4552.
Korhonen, F., Powell, R. & Stout, J. 2012. Stability of sapphirine+quartz in the oxidized rocks of the Wilson Lake terrane, Labrador: calculated equilibria in NCKFMASHTO. Journal of Metamorphic Geology 30 (1), 2136.
Kröner, A. & Stern, R. J. 2004. Pan-African Orogeny. In Encyclopedia of Geology (eds Selley, R. C., Cocks, R. M. & Plimer, I. R.), pp. 112. Amsterdam: Elsevier.
Leather, J., Allen, P. A., Brasier, M. D. & Cozzi, A. 2002. Neoproterozoic snowball Earth under scrutiny: Evidence from the Fiq glaciation of Oman. Geology 30 (10), 891–4.
Li, Z.-X., Bogdanova, S., Collins, A., Davidson, A., De Waele, B., Ernst, R., Fitzsimons, I., Fuck, R., Gladkochub, D. & Jacobs, J. 2008. Assembly, configuration, and break-up history of Rodinia: a synthesis. Precambrian Research 160 (1), 179210.
Meert, J. G. 2003. A synopsis of events related to the assembly of eastern Gondwana. Tectonophysics 362 (1), 140.
Meert, J. G. & Lieberman, B. S. 2008. The Neoproterozoic assembly of Gondwana and its relationship to the Ediacaran–Cambrian radiation. Gondwana Research 14 (1), 521.
Meert, J. G., Pandit, M. K. & Kamenov, G. D. 2013. Further geochronological and paleomagnetic constraints on Malani (and pre-Malani) magmatism in NW India. Tectonophysics 608, 1254–67.
Mercolli, I., Briner, A. P., Frei, R., Schönberg, R., Nägler, T. F., Kramers, J. & Peters, T. 2006. Lithostratigraphy and geochronology of the Neoproterozoic crystalline basement of Salalah, Dhofar, Sultanate of Oman. Precambrian Research 145 (3), 182206.
Merdith, A., Muller, D., Collins, A., Williams, S., Pisarevsky, S., Foden, J., Archibald, D., Blades, M. L., Alessio, B., Armistead, S., Plavsa, D. & Clark, C. In press. A full-plate global reconstruction of the Neoproterozoic. Gondwana Research.
Miller, D. M., Goldstein, S. L. & Langmuir, C. H. 1994. Cerium/lead and lead isotope ratios in arc magmas and the enrichment of lead in the continents. Nature 368 (6471), 514–20.
Morrissey, L. J., Hand, M. & Kelsey, D. E. 2015. Multi-stage metamorphism in the Rayner–Eastern Ghats Terrane: P–T–t constraints from the northern Prince Charles Mountains, east Antarctica. Precambrian Research 267, 137–63.
Pallister, J. S., Cole, J. C., Stoeser, D. B. & Quick, J. E. 1990. Use and abuse of crustal accretion calculations. Geology 18 (1), 35–9.
Pandey, B., Gupta, J., Sarma, K. & Sastry, C. 1997. Sm-Nd, Pb-Pb and Rb-Sr geochronology and petrogenesis of the mafic dyke swarm of Mahbubnagar, South India: implications for Paleoproterozoic crustal evolution of the Eastern Dharwar Craton. Precambrian Research 84 (3), 181–96.
Pandit, M., Carter, L., Ashwal, L., Tucker, R., Torsvik, T., Jamtveit, B. & Bhushan, S. 2003. Age, petrogenesis and significance of 1Ga granitoids and related rocks from the Sendra area, Aravalli Craton, NW India. Journal of Asian Earth Sciences 22 (4), 363–81.
Payne, J., Hand, M., Barovich, K. & Wade, B. 2008. Temporal constraints on the timing of high-grade metamorphism in the northern Gawler Craton: implications for assembly of the Australian Proterozoic. Australian Journal of Earth Sciences 55 (5), 623–40.
Payne, J. L., McInerney, D. J., Barovich, K. M., Kirkland, C. L., Pearson, N. J. & Hand, M. 2016. Strengths and limitations of zircon Lu-Hf and O isotopes in modelling crustal growth. Lithos 248, 175–92.
Payne, J. L., Pearson, N. J., Grant, K. J. & Halverson, G. P. 2013. Reassessment of relative oxide formation rates and molecular interferences on in situ lutetium–hafnium analysis with laser ablation MC-ICP-MS. Journal of Analytical Atomic Spectrometry 28 (7), 1068–79.
Powell, R., White, R., Green, E., Holland, T. & Diener, J. 2014. On parameterizing thermodynamic descriptions of minerals for petrological calculations. Journal of Metamorphic Geology 32 (3), 245–60.
Rantakokko, N. E., Whitehouse, M. J., Pease, V. & Windley, B. F. 2014. Neoproterozoic evolution of the eastern Arabian basement based on a refined geochronology of the Marbat region, Sultanate of Oman. In Tectonic Evolution of the Oman Mountains (eds Rollinson, H. R., Searle, M. P., Abbasi, I. A., Al-Lazki, A. I. & Kindi, M. H. Al), pp. 107–27. Geological Society of London, Special Publication no. 392.
Raza, M., Khan, A., Bhardwaj, V. & Rais, S. 2012. Geochemistry of Mesoproterozoic sedimentary rocks of upper Vindhyan Group, southeastern Rajasthan and implications for weathering history, composition and tectonic setting of continental crust in the northern part of Indian shield. Journal of Asian Earth Sciences 48, 160–72.
Renne, P. R., Balco, G., Ludwig, K. R., Mundil, R. & Min, K. 2011. Response to the comment by WH Schwarz et al. on “Joint determination of 40 K decay constants and 40 Ar∗/40 K for the Fish Canyon sanidine standard, and improved accuracy for 40 Ar/39 Ar geochronology” by Renne, PR et al. (2010). Geochimica et Cosmochimica Acta 75 (17), 5097–100.
Rieu, R., Allen, P. A., Cozzi, A., Kosler, J. & Bussy, F. 2007. A composite stratigraphy for the Neoproterozoic Huqf Supergroup of Oman: integrating new litho-, chemo- and chronostratigraphic data of the Mirbat area, southern Oman. Journal of the Geological Society 164 (5), 9971009.
Robinson, F., Foden, J. & Collins, A. 2015a. Geochemical and isotopic constraints on island arc, synorogenic, post-orogenic and anorogenic granitoids in the Arabian Shield, Saudi Arabia. Lithos 220, 97115.
Robinson, F., Foden, J. & Collins, A. 2015 b. Zircon geochemical and geochronological constraints on contaminated and Enriched Mantle sources beneath the Arabian Shield, Saudi Arabia. The Journal of Geology 123 (5), 463–89.
Robinson, F., Foden, J., Collins, A. & Payne, J. 2014. Arabian Shield magmatic cycles and their relationship with Gondwana assembly: insights from zircon U–Pb and Hf isotopes. Earth and Planetary Science Letters 408, 207–25.
Roger, J., Bechennec, F., Janjou, D., Le Metour, J., Wyns, R. & Beurrier, M. 1991. Geological Map of Ja'alan, Sheet NF 40–8 E, 1–100 000. Directorate General of Minerals, Oman Ministry of Petroleum and Minerals.
Sassi, F., Visona, D., Ferrara, G., Gatto, G., Ibrahim, H., Said, A. & Tonarini, S. 1993. The crystalline basement of Northern Somalia: lithostratigraphy and sequence of events. In Geology and Mineral Resources of Somalia and Surrounding Regions (eds Abbate, E., Sagri, M. & Sassi, F.), pp. 340. 1st Agron Oltemare, Firenze, Relaz. Monogr. 113.
Sláma, J., Košler, J., Condon, D. J., Crowley, J. L., Gerdes, A., Hanchar, J. M., Horstwood, M. S., Morris, G. A., Nasdala, L. & Norberg, N. 2008. Plešovice zircon—a new natural reference material for U–Pb and Hf isotopic microanalysis. Chemical Geology 249 (1), 135.
Smith, H. A. & Barreiro, B. 1990. Monazite U-Pb dating of staurolite grade metamorphism in pelitic schists. Contributions to Mineralogy and Petrology 105 (5), 602–15.
Stern, R. J. 1994. Arc-assembly and continental collision in the Neoproterozoic African orogen: implications for the consolidation of Gondwanaland. Annual Review of Earth and Planetary Sciences 22, 319–51.
Stern, R. J. & Johnson, P. 2010. Continental lithosphere of the Arabian Plate: a geologic, petrologic, and geophysical synthesis. Earth-Science Reviews 101 (1), 2967.
Stüwe, K. 2007. Geodynamics of the Lithosphere: An Introduction. Berlin, Heidelberg: Springer Science & Business Media.
Sun, S.-S. & McDonough, W. 1989. Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes. In Magmatism in the Ocean Basins (eds Saunders, A. D. & Norry, M. J.), pp. 313–45. Geological Society of London, Special Publication no. 42.
Thomas, R. J., De Waele, B., Schofield, D., Goodenough, K. M., Horstwood, M., Tucker, R., Bauer, W., Annells, R., Howard, K. & Walsh, G. 2009. Geological evolution of the Neoproterozoic Bemarivo Belt, northern Madagascar. Precambrian Research 172 (3), 279300.
Torsvik, T., Carter, L., Ashwal, L., Bhushan, S., Pandit, M. & Jamtveit, B. 2001. Rodinia refined or obscured: palaeomagnetism of the Malani igneous suite (NW India). Precambrian Research 108 (3), 319–33.
Tuccillo, M., Essene, E. & Van Der Pluijm, B. 1990. Growth and retrograde zoning in garnets from high-grade, metapelites: Implications for pressure-temperature paths. Geology 18 (9), 839–42.
Tucker, R., Ashwal, L. & Torsvik, T. 2001. U–Pb geochronology of Seychelles granitoids: a Neoproterozoic continental arc fragment. Earth and Planetary Science Letters 187 (1), 2738.
Van Lente, B., Ashwal, L., Pandit, M., Bowring, S. & Torsvik, T. 2009. Neoproterozoic hydrothermally altered basaltic rocks from Rajasthan, northwest India: implications for late Precambrian tectonic evolution of the Aravalli Craton. Precambrian Research 170 (3), 202–22.
Wade, B., Hand, M., Maidment, D., Close, D. & Scrimgeour, I. 2008. Origin of metasedimentary and igneous rocks from the Entia Dome, eastern Arunta region, central Australia: a U–Pb LA-ICPMS, SHRIMP and Sm–Nd isotope study. Australian Journal of Earth Sciences 55 (5), 703–19.
Wendt, I. & Carl, C. 1991. The statistical distribution of the mean squared weighted deviation. Chemical Geology: Isotope Geoscience Section 86 (4), 275–85.
Westerhof, A. B., Härmä, P., Isabirye, E., Katto, E., Koistinen, T., Kuosmanen, E., Lehto, T., Lehtonen, M. I., Mäkitie, H. & Manninen, T. 2014. Geology and Geodynamic Development of Uganda with Explanation of the 1: 1,000,000 Scale Geological Map. Espoo, Finland: Geological Survey of Finland.
White, R., Powell, R., Holland, T., Johnson, T. & Green, E. 2014. New mineral activity–composition relations for thermodynamic calculations in metapelitic systems. Journal of Metamorphic Geology 32 (3), 261–86.
White, R., Powell, R. & Johnson, T. 2014. The effect of Mn on mineral stability in metapelites revisited: new a–x relations for manganese-bearing minerals. Journal of Metamorphic Geology 32 (8), 809–28.
Whitehouse, M., Pease, V. & Al Khirbash, S. 2016. Neoproterozoic crustal growth at the margin of the East Gondwana continent - age and isotopic constraints from the easternmost inliers of Oman. International Geology Review 58 (14), 2046–64.
Whitehouse, M. J., Windley, B. F., Stoeser, D. B., Al-Khirbash, S., Ba-Bttat, M. A. & Haider, A. 2001. Precambrian basement character of Yemen and correlations with Saudi Arabia and Somalia. Precambrian Research 105 (2), 357–69.
Wing, B. A., Ferry, J. M. & Harrison, T. M. 2003. Prograde destruction and formation of monazite and allanite during contact and regional metamorphism of pelites: petrology and geochronology. Contributions to Mineralogy and Petrology 145 (2), 228–50.
Woodhead, J., Hergt, J., Shelley, M., Eggins, S. & Kemp, R. 2004. Zircon Hf-isotope analysis with an excimer laser, depth profiling, ablation of complex geometries, and concomitant age estimation. Chemical Geology 209 (1), 121–35.
Worthing, M. 2005. Petrology and geochronology of a Neoproterozoic dyke swarm from Marbat, South Oman. Journal of African Earth Sciences 41 (3), 248–65.
Yeshanew, F. G., Pease, V., Whitehouse, M. J. & Al-Khirbash, S. 2015. Zircon U–Pb geochronology and Nd isotope systematics of the Abas terrane, Yemen: implications for Neoproterozoic crust reworking events. Precambrian Research 267, 106–20.
Zhao, G., Wilde, S. A., Cawood, P. A. & Sun, M. 2001. Archean blocks and their boundaries in the North China Craton: lithological, geochemical, structural and P–T path constraints and tectonic evolution. Precambrian Research 107 (1), 4573.


Type Description Title
Supplementary materials

Alessio supplementary material
Alessio supplementary material 1

 Word (2.8 MB)
2.8 MB

Origin and tectonic evolution of the NE basement of Oman: a window into the Neoproterozoic accretionary growth of India?



Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed