Lower Permian basaltic agglomerate from the Tsengel River valley, Mongolian Altai
DOI:
https://doi.org/10.5564/mgs.v51i0.1457Keywords:
LA-ICP-MS zircon dating, Permian volcanism, Gobi-Altai zoneAbstract
A new occurrence of Permian volcanic and volcaniclastic rocks in the Mongolian Altai south of the Main Mongolian Lineament was described between soums of Tugrug and Tseel in Gobi-Altai aimag. Studied vitrophyric pyroxene basalt lies in a layer of agglomerate and amygdaloidal lavas, which is a part of NE–SW trending subvertical sequence of varicolored siltstones and volcaniclastic rocks in the Tsengel River valley. This high-Mg basalt is enriched in large ion lithophile elements, Pb and Sr and depleted in Nb and Ta. LA-ICP-MS dating on 44 spots reveals several concordia clusters. The whole rock geochemistry of sample fits volcanic arc characteristic in the geotectonic discrimination diagrams. Dominant zircon data yield Upper Carboniferous and Permian magmatic ages 304.4 ± 2.3 and 288.6 ± 1.9 Ma. Two smaller clusters of Upper Devonian (376 ± 4.7 Ma) to Lower Carboniferous ages (351.9 ± 3.5 Ma) indicate probably contamination of ascending magmatic material. Youngest Triassic age found in three morphologically differing grains reflects probably lead loss. Described high-Mg basalt lava represents sub-aerial volcanism in volcanic arc environment developed over the N dipping subduction zone in the southwestern Mongolia in the time span from Uppermost Carboniferous to Permian during terminal stage of its activity.
Downloads
399
References
Agrawal, S., Guevara, M., Verma, S.P. 2008. Tectonic discrimination of basic and ultrabasic volcanic rocks through log-transformed ratios of immobile trace elements: International Geology Review v. 50, p. 1057–1079. doi.org/10.2747/0020-6814.50.12.1057
Badarch, G., Cunnigham, W. D., Windley B. F. 2002. A new terrane subdivision for Mongolia: Implications for the Phanerozoic crustal growth of central Asia: Journal of Asian Earth v. Sciences 21(1), p. 87–110. doi:10.1016/S1367-9120(02)00017-2
Boynton W. V. 1984. Cosmochemistry of the rare earth elements: meteorite studies. In: Henderson P. ed.: Rare Earth Element Geochemistry, p. 63–114., Elsevier, Amsterdam. doi.org/10.1016/B978-0-444-42148-7.50008-3
Burenjargal, U., Okamoto, A., Kuwatani, T., Sakata, S., Hirata, T., Tsuchiya, N. 2014. Thermal evolution of the Tseel Terrane, SW Mongolia and its relation to granitoid intrusions in the Central Asian Orogenic Belt: Journal of Metamorphic Geology v. 32, p. 765–790. doi.org/10.1111/jmg.12090
Burenjargal, U., Okamoto, A., Tsuchiya, N., Uno, M., Horie, K., Hokada, T. 2016. Contrasting geochemical signatures of Devonian and Permian granitoids from the Tseel Terrane, SW Mongolia: Journal of Geosciences v. 61, 51–66. doi.org/10.3190/jgeosci.210
Buriánek, D., Hanžl, P., Budil, P., Gerdes, A. 2012. Evolution of the Early Permian volcanic–plutonic complex in the western part of the Permian Gobi–Altay Rift (Khar Argalant Mts., SW Mongolia): Journal of Geosciences v 57 (2), 105–126. doi.org/10.3190/jgeosci.116
Buriánek, D., Janoušek, V., Hanžl, P., Jiang, Y., Schulmann, K., Lexa, O., Altanbaatar, B. 2016. Petrogenesis of the Late Carboniferous Sagsai Pluton in the SE Mongolian Altai: Journal of Geosciences v. 61, p. 67–92. doi:10.3190/jgeosci.207
Cai, K., Sun, M., Jahn, B. M., Xiao, W. J., Yuan, C., Long, X., Chen, H., Tumurkhuu, D. 2015. A synthesis of zircon U-Pb ages and Hf isotopic compositions of granitoids from southwest Mongolia: implications for crustal nature and tectonic evolution of the Altai Superterrane: Lithos v. 232, p. 131–142. doi:10.1016/j.lithos.2015.06.014
Hanžl, P., Bat-Ulzii, D., Rejchrt, M., Košler, J., Bolormaa, K., Hrdličková, K. 2008. Geology and geochemistry of the Palaeozoic plutonic bodies of the Trans-Altay Gobi, SW Mongolia: Implications for magmatic processes in an accreted volcanic-arc system. Journal of Geosciencesv. 53 (2), p. 201–234. DOI: 10.3190/jgeosci.028
Hanžl, P., Schulmann, K., Janoušek, V., Lexa, O., Hrdličková, K., Jiang, Y., Buriánek, D., Altanbaatar, B., Ganchuluun, T., Erban, V. 2016. Making continental crust: origin of Devonian orthogneisses from SE Mongolian Altai: Journal of Geosciences v. 61, p. 1–10. doi:10.3190/jgeosci.206
Hanžl, P., Guy, A., Battushig, A., Lexa, O., Schulmann, K., Kunceová, E., Hrdličková, K., Janoušek, V., Buriánek, D., Krejčí, Z., Jiang, Y., Otgonbator, D. 2020. Geology of the Gobi and Mongol Altai junction enhanced by gravity analysis: a key for understanding of the Mongolian Altaides. Journal of Maps v. 16 (2), p. 98–107. doi.org/10.1080/17445647.2019.1700835
Hrdličková, K., Bolormaa, K., Buriánek, D., Hanžl, P., Gerdes, A., Janoušek, V. 2008. Petrology and age of metamorphosed rocks in tectonic slices inside the Palaeozoic sediments of the eastern Mongolian Altay, SW Mongolia: Journal of Geosciences v. 53, p. 139–165. doi.org/10.3190/jgeosci.027
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 v. 211, p. 47-69. doi.org/10.1016/j.chemgeo.2004.06.017
Janoušek, V., Farrow, C. M., Erban, V. 2006. Interpretation of whole-rock geochemical data in igneous geochemistry: introducing Geochemical Data Toolkit (GCDkit): Journal of Petrology v. 47, p. 1255–1259. doi:10.1093/petrology/egl013
Janoušek, V., Jiang, Y., Buriánek, D., Schulmann, K., Hanžl, P., Soejono, I., Kröner, A., Altanbaatar, B., Erban, V., Lexa, O., Ganchuluun, T., Košler J. 2018. Cambrian–Ordovician magmatism of the Ikh-Mongol Arc System exemplified by the Khantaishir Magmatic Complex (Lake Zone, south–central Mongolia): Gondwana Research v. 54, p. 122–149. DOI: 10.1016/j.gr.2017.10.003
Jensen, L. S., 1976. A new cation plot for classifying sub-alkaline volcanic rocks Ontario Division Mines Miscellaneous Paper No. 66 p. 1–22.
Kozakov, I. K., Kirnozova, T. I., Kovach, V. P., Terent’eva, L. B., Tolmacheva, E. V., Fugzan, M. M., Erdenezhargal, Ch. 2015. Late Riphean age of the crystalline basement of the carbonate cover of the Dzabkhan microcontinent: Stratigraphy and Geological Correlation v. 23, p. 237–245. doi.org/10.1134/S0869593815030041
Kozlovsky, A. M., Yarmolyuk, V. V., Sal’nikova, E. B., Travin, A. V., Kotov,
A. B., Plotkina, J. V., Kudryashova, E. A., Savatenkov, V. M. 2015. Late Paleozoic
anorogenic magmatism of the Gobi Altai (SW Mongolia): tectonic position, geochronology and correlation with igneous activity of the Central Asian Orogenic Belt: Journal of Asian Earth Sciences v. 113, p. 524–541. doi.org/10.1016/j.jseaes.2015.01.013
Le Bas M.J., Le Maitre R.W., Streckeisen A., Zanettin B. 1986. A Chemical Classification of Volcanic Rocks Based on the Total Alkali-Silica Diagram. Journal of Petrology v. 27, p.745–750
Lehmann, J., Schulmann, K., Lexa, O., Závada, P., Štípská, P., Hasalová, P., Belyanin, G., Corsini, M. 2017. Detachment folding of partially molten crust in accretionary orogens: A new magma-enhanced vertical mass and heat transfer mechanism: Lithosphere v. 9 (6). p. 889–909. doi:10.2475/07.2010.02
Ludwig, K.R. 2003. Isoplot 3.00: A geochronological toolkit for Microsoft Excel: Berkeley Geochronology Center Special Publication.
Mossakovsky, A.A., Ruzhentsev, S.V., Samygin, S.G., Kheraskova, T. N. 1993. The Central Asian fold belt: geodynamic evolution and formation history: Geotectonics v. 26, p. 455–473.
Nguyen, H., Hanžl, P., Janoušek, V., Schulmann, K., Ulrich, M., Jiang, Y., Lexa O., Altanbaatar, B., Deiller, P. 2018. Geochemistry and geochronology of Mississippian volcanic rocks from SW Mongolia: Implications for terrane subdivision and magmatic arc activity in the Trans-Altai Zone: Journal of Asian Earth Sciences v. 164, p. 322–343. doi: 10.1016/j.jseaes.2018.06.029
Paton, C., Woodhead, J.D., Hellstrom, J.C., Hergt, J.M., Greig A., Maas, R. 2010. Improved laser ablation U‐Pb zircon geochronology through robust downhole fractionation correction: Geochemistry, Geophysics, Geosystems, v. 11(3), p. 1–36. doi: 10.1029/2009GC002618
Pearce, J. 1996. Sources and setting granitic rocks: Episodes v. 19 (4), p. 120–125.
Pearce, J. A., Harris, N. W., Tindle, A. G. 1984. Trace element discrimination diagrams for the tectonic interpretation of granitic rocks: Journal of Petrology v. 25, p. 956–983. doi.org/10.1093/petrology/25.4.956
Sibley, D. F., Vogel, T. A., Walker, B. M., Byerly, G. 1976. The origin ofoscillatory zoning in plagioclase: a diffusion and growth controlled model: American Journal of Science v. 276, p. 275–284.
Sláma, J., Košler, J., Condon, D.J., Crowley, J.L., Gerdes, A., Hanchar, J.M., Horstwood, M.S.A., Morris, G.A., Nasdala, L., Norberg, N., Schaltegger, U., Schoene, B., Tubrett, M.N., Whitehouse, M.J. 2008. Plešovice zircon—A new natural reference material for U–Pb and Hf isotopic microanalysis. Chemical Geology v. 249, p. 1–35. doi.org/10.1016/j.chemgeo.2007.11.005
Soejono, I., Buriánek, D., Svojtka, M., Žáček, V., Čáp, P., Janoušek, V. 2016. Mid-Ordovician and Late Devonian magmatism in the Togtokhinshil Complex: new insight into the formation and accretionary evolution of the Lake Zone (western Mongolia): Journal of Geosciences v. 61 (1), p. 5–23. doi.org/10.3190/jgeosci.208
Sun, S. S., McDonough, W. F. 1989. Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes. In: Saunders, A.D., Norry, M.J. eds) Magmatism in ocean basins: Geological Society of London, v. 42. Special Publications, p. 313–345. doi.org/10.1144/GSL.SP.1989.042.01.19
Togtokh, D., Baatarkhuiag, A., Bayadalai, S., Usna-Ekh, C. 1995. Tonkhilyn I-Rangiin 1988-1991 ond xiisen 1 : 200 000-ny masshatabtai geologiin bulegchilcen zuralalyn ur dungiin taijlan. – MS MRPAM.
Wiedenbeck, M., Allé, P., Corfu, F., Griffin, W.L., Meier, M., Oberli F., Von Quadt A., Roddick J.C., Spiegel W. 1995. Three natural zircon standards for U‐Th‐Pb, Lu‐Hf, trace element and REE analyses: Geostandards and Geoanalytical Research v. 19 (1), p. 1–23. doi.org/10.1111/j.1751-908X.1995.tb00147.x
Windley, B. F., Alexeiev, D., Xiao, W., Kroner, A., Badarch, G. 2007. Tectonic models for the accretion of the Central Asian orogenic belt: Journal of the Geological Society of London v. 164(1), 31–47. doi.org/10.1144/0016-76492006-022
Wood, D. A. 1980. The application of a Th–Hf–Ta diagram to problems of tectonomagmatic classification and to establishing the nature of crustal contamination of basaltic lavas of the British Tertiary volcanic province: Earth and Planetary Science Letters v. 50, p. 11–30. doi.org/10.1016/0012-821X(80)90116-8
Downloads
Published
How to Cite
Issue
Section
License
Copyright on any research article in the Mongolian Geoscientist is retained by the author(s).
The authors grant the Mongolian Geoscientist a license to publish the article and identify itself as the original publisher.
Articles in the Mongolian Geoscientist are Open Access articles published under a Creative Commons Attribution 4.0 International License CC BY.
This license permits use, distribution and reproduction in any medium, provided the original work is properly cited.
