THE NATURE OF ULTRAMAFIC XENOLITHS IN THE BASALTS OF LANZAROTE ISLAND (CANARY ARCHIPELAGO)
https://doi.org/10.5800/GT-2022-13-4-0663
Abstract
Mineralogical and geochemical study was performed on peridotite xenolith hosted by amygdaline basalts of Lanzarote Island (Canary archipelago). Their modal composition corresponds to harzburgite. Remarkably, the petrographic composition of the rocks is marked by presence of plagioclase. The isochron shows the age of 267±35 Ma, which might be the initial stage of opening a fragment of the Atlantic Ocean. The peridotites were apparently derived in the magmatic chamber formed by "underplating" triggered by interaction of mantle substrate with the lower crust material.
Keywords
xenoliths,
ultrabasic rocks,
isotopic composition of minerals,
geochronological age,
geochemistry of rock-forming minerals,
Canary archipelago
Supporting agencies: This research was supported by the Development Program of Tomsk State University (Priority-2030, IG.49.2022) and the Ministry of Science and Higher Education of the Russian Federation as part of the implementation of the state assignment (Project 0721-2020-0041). This work involved equipment of the Shared Research Facilities "Analytical Center of Natural Systems Geochemistry" (Assignment 075-15-2021-693).
About the Authors
V. A. Krylova
National Research Tomsk State University
Russian Federation
Russian Federation
36 Lenin Ave, Tomsk 634050
I. F. Gertner
National Research Tomsk State University
Russian Federation
Russian Federation
36 Lenin Ave, Tomsk 634050
G. Gutiérrez-Alonso
National Research Tomsk State University; University of Salamanca
Russian Federation
Russian Federation
36 Lenin Ave, Tomsk 634050
Salamanca 37008, Spain
References
1. De Ignacio C., Munoz M., Sagredo J., Fernandez-Santin S., Johansson A., 2006. Isotope Geochemistry and FOZO Mantle Component of the Alkaline-Carbonatitic Association of Fuerteventure, Canary Island, Spain. Chemical Geology 232 (3–4), 99–113. https://doi.org/10.1016/J.CHEMGEO.2006.02.009.
2. Ernst R.E., 2014. Large Igneous Provinces. Cambridge University Press, London, 653 p. https://doi.org/10.1017/CBO9781139025300.
3. Gómez-Ulla A., Sigmarsson O., Gudfinnsson G.H., 2017. Trace Element Systematics of Olivine from Historical Eruptions of Lanzarote, Canary Islands: Constraints on Mantle and Melting Mode. Chemical Geology 449, 98–111. https://doi.org/10.1016/j.chemgeo.2016.11.021.
4. Grachev A.F., 2012. MORB-Like Mantle beneath Lanzarote Island, Canary Islands. Russian Journal of Earth Science 12, ES3004. https://doi.org/10.2205/2012ES000515.
5. Krylova V.A., Gertner I.F., 2020. Features of the Composition of the Main Rock-Forming Minerals of Basalts and Xenoliths of the Canary Archipelago (Spain). Vestnik of Geosciences 4 (304), 3–8 (in Russian) https://doi.org/10.19110/geov.2020.4.1.
6. Krylova V.A., Gutiérrez-Alonso G., Gertner I.F., Krasnova T.S., 2021. Petrofabric and Geochemical Features of Ultramafic Rocks on the Example of Restite Metamorphites of the Kuznetsk Alatau (Western Siberia), Olivine Cumulates of the Yoko-Dovyren Layered Massif (Northern Cisbaikalia) and Their Analogues from Ultrabasic Xenoliths of the Canary Islands (Spain). Vestnik Saint Petersburg University. Earth Sciences 66 (4), 706–722 (in Russian) https://doi.org/10.21638/spbu07.2021.404.
7. Longpré M.-A., Felpeto A., 2021. Historical Volcanism in the Canary Islands; Part 1: A Review of Precursory and Eruption Parameter Estimates, and Implications for Hazard Assessment. Journal of Volcanology and Geochemical Research 419, 107363. https://doi.org/10.1016/j.jvolgeores.2021.107363.
8. Mezougane H., Aissa M., Essalhi M., Moussaid A., Souiri M., Touil A., Bilal E., Souiah M., 2022. New Petro-Geochemical Data on Carboniferous Mafic Rocks in the Achemmach Area (NW, Fourhal Basin, Moroccan Central Massif). Minerals 12 (5), 622. https://doi.org/10.3390/min12050622.
9. Neumann E.R., Sorensen V.B., Johnsen K., 2000. Gabbroic Xenolites from La Palma, Tenerife and Lanzarote, Canary Island: Evidence for Reactions between Mafic Alkaline Canary Islands Melts and Old Oceanic Crust. Journal of Geochemistry and Geothermal Research 103 (1–4), 313–342. https://doi.org/10.1016/S0377-0273(00)00229-8.
10. Raczek I., Jochum K.P., Hofmann A.W., 2003. Neodymium and Strontium Isotope Data for USGS Reference Materials BCR-1, BCR-2, BHVO-1, BHVO-2, AGV-1, AGV-2, GSP-1, GSP-2 and Eight MPI-DING Reference Glasses. Geostandards and Geoanalytical Research 27 (2), 173–179. https://doi.org/10.1111/j.1751-908X.2003.tb00644.x.
11. Sagan M., Heaman L.M., Pearson D.G., Lao Y., Stern R.A., 2020. Removal of Continental Lithosphere beneath the Canary Archipelago Revealed a U-Pb and Hf/O Isotope Study of Modern Sand Detrital Zircons. Lithos 362–363. 105448. https://doi.org/10.1016/j.lithos.2020.105448.
12. Tanaka T., Togashi S., Kamioka H., Amakawa H., Kagami H., Hamamoto T., Yuhara M., Orihashi Y. et al., 2000. JNdi-1: A Neodymium Isotopic Reference in Consistency with Lajolla Neodymium. Chemical Geology 168 (3–4), 279–281. https://doi.org/10.1016/S0009-2541(00)00198-4.
13. Thirlwall M.F., Jenkins C., Virson P.Z., Mattey D.P., 1997. Crustal Interaction during Construction of Ocean Islands: Pb-Sr-Nd-O Isotope Geochemistry of Shield Basalts of Gran Canaria, Canary Islands. Chemical Geology 135 (3–4), 233–262. https://doi.org/10.1016/S0009-2541(96)00118-0.
Review
For citations:
Krylova V.A., Gertner I.F., Gutiérrez-Alonso G. THE NATURE OF ULTRAMAFIC XENOLITHS IN THE BASALTS OF LANZAROTE ISLAND (CANARY ARCHIPELAGO). Geodynamics & Tectonophysics. 2022;13(4):0663. (In Russ.) https://doi.org/10.5800/GT-2022-13-4-0663
Views:
433
Email this article 