Magmatic Evolution of the Western Branch of the East African Rift System Melts: Evidence by Silicate Melt Inclusions, Rock Petrography and Geochemistry of the Nyiragongo 1977 and 2002 Lavas in DRC — Oak Academic Publishing
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Magmatic Evolution of the Western Branch of the East African Rift System Melts: Evidence by Silicate Melt Inclusions, Rock Petrography and Geochemistry of the Nyiragongo 1977 and 2002 Lavas in DRC
Department of Energy Resource Engineering, College of Engineering, Inha University, Incheon, Republic of Korea
,
Department of Geosciences, College of Natural Sciences, Kinshasa University, Kinshasa, Republic Democratic of Congo
1 Department of Energy Resource Engineering, College of Engineering, Inha University, Incheon, Republic of Korea
2 Department of Geosciences, College of Natural Sciences, Kinshasa University, Kinshasa, Republic Democratic of Congo
Nyiragongo volcanic eruptions of 1977 and 2002 emitted silica-undersaturated lavas named melilite-nephelinites with microlithic to sub-porphyritic textures, and consisted of olivine, clinopyroxene (augite), phlogopite, melilite, magnetite, and rare plagioclases. This melilite-nephelinite as an evolved rock, shows low SiO 2 (38.40 - 39.52 wt%) and MgO (3.10 - 4.01 wt%), and relatively high FeOt (13.76 - 14.10 wt%), Al 2 O 3 (15.01 - 16.48 wt%), CaO (11.00 - 12.29 wt%) and Na 2 O + K 2 O (10.34 - 11.85 wt%). Unlike LA-ICP-MS on silicate melt inclusions (SMIs) hosted in augite show a pristine melt of picrobasaltic (low Ti-picrite) rock poor in SiO 2 (31.14 - 32.26 wt%), FeOt (2.19 - 2.79 wt%), Al 2 O 3 (8.01 - 9.57 wt%), and Na 2 O + K 2 O (2.34 - 3.05 wt%), while enriched in MgO (20.27 - 28.63 wt%), and CaO (24.95 - 33.17 wt%). The sums (∑REEs) for lavas and SMIs are ranging 712 - 799 and 43 - 119 ppm respectively. REE contracted multi-element patterns showed a W-feature for most lava s except for SMIs. High Rb/Sr, and low Ba/Rb, Zr/Nb, and Sm/Hf ratios of lavas suggest a phlogopite-rich source of materials.
Auchapt, A., Dupuy, C., Dostal, J. and Kanika, M. (1987) Geochemistry and Petrogenesis of Rift-Related Volcanic Rocks from South Kivu (Zaire). Journal of Volcanology and Geothermal Research, 31, 33-46. https://doi.org/10.1016/0377-0273(87)90004-7
Kampunzu, A.B., Sebagenzi, M.N., Caron, J.P.H. and Vellutini, P. (1982) Comparaison petrochimique entre les laves du champ Sud-Kivu (Bukavu) et Nord-Kivu (Virunga), Zaire. Annale de la Sociète Gélogique de Belgique, 105, 25-29.
Kampunzu, A.B., Bonhomme, M.G. and Kanika, M. (1998) Geochronology of Volcanic Rocks and Evolution of the Cenozoic Western Branch of the East African Rift System. Journal of African Earth Sciences, 26, 441-461. https://doi.org/10.1016/S0899-5362(98)00025-6
Chakrabarti, R., Basu, A.R., Santo, A.P., Tedesco, D. and Vaselli, O. (2009) Isotopic and Geochemical Evidence for a Heterogeneous Mantle Plume Origin of the Virunga Volcanics, Western Rift, East African Rift System. Chemical Geology, 259, 273-289. https://doi.org/10.1016/j.chemgeo.2008.11.010
Chakrabarti, R., Sims, K.W.W., Basu, A.R., Reagan, M. and Durieux, J. (2009) Timescales of Magmatic Processes and Eruption Ages of the Nyiragongo Volcanics from 238U-230Th-226Ra-210Pb Disequilibria. Earth and Planetary Science Letters, 288, 149-157. https://doi.org/10.1016/j.epsl.2009.09.017
Pouclet, A., Bellon, H. and Bram, K. (2016) The Cenozoic Volcanism in the Kivu Rift: Assessment of the Tectonic Setting, Geochemistry, and Geochronology of the Volcanic Activity in the South-Kivu and Virunga Regions. Journal of African Earth Sciences, 121, 219-246. https://doi.org/10.1016/j.jafrearsci.2016.05.026
Pouclet, A. and Bram, K. (2021) Nyiragongo and Nyamuragira: A Review of Volcanic Activity in the Kivu Rift, Western Branch of the East African Rift System. Bulletin of Volcanology, 83, Article No. 10. https://doi.org/10.1007/s00445-021-01435-6
Ongendangenda, T.A. (2020) Volcanologie de la chaine des Virunga: échos des profondeurs magmatiques. Volcanologie de la chaine des Virunga, 1-308.
Komorowski, J.-C., Tedesco, D., Kasereka, M., Allard, P., Papale, P., Vaselli, O., Durieux, J., Baxter, P., Halbwachs, M., Akumbe, M., Baluku, B., Briole, P., Ciraba, M., Dupin, J.-C., Etoy, O., Garcin, D., Hamaguchi, H., Houlié, N., Kavotha, K.S., Lemarchand, A., Lockwood, J., Lukaya, N., Mavonga, J., DeMichele, M., Mpore, S., Mukambilwa, K., Munyololo, F., Newhall, C., Ruch, J., Yalire, M.A. and Wafula, M. (2002) The January 2002 Flank Eruption of Nyiragongo Volcano (Democratic Republic of Congo): Chronology, Evidence for Tectonic Rift Trigger and Impact of Lava Flows on the City of Goma. Acta Vulcanologica, 14-15, 27-62.
Head, E., Lanzirotti, A., Newville, M. and Sutton, S. (2018) Vanadium, Sulfur, and Iron Valences in Melt Inclusions as a Window into Magmatic Processes: A Case Study at Nyamuragira Volcano, Africa. Geochimica et Cosmochimica Acta, 226, 149-173. https://doi.org/10.1016/j.gca.2018.01.033
Minissale, S., Casalini, M., Cucciniello, C., Balagizi, C., Tedesco, D., Boudoire, G., Morra, V. and Melluso, L. (2022) The Geochemistry of Recent Nyamulagira and Nyiragongo Potassic Lavas, Virunga Volcanic Province, and Implications on the Enrichment Processes in the Mantle Lithosphere of the Tanzania-Congo Craton. Lithos, 420-421, Article ID: 106696. https://doi.org/10.1016/j.lithos.2022.106696
Hamaguchi, H., Wafula, M., Kasereka, M. and Akumbi, M. (2002) Preliminary Report on Emergency Survey of Nyiragongo Eruption on January 17, 2002; V032-004. Research Centre for Prediction of Earthquake and Volcanic Eruptions, Tohoku University, Miyagi, 1-2.
Cas, R.A.F. (2022) The Centenary of IAVCEI 1919-2019 and Beyond: Origins and Evolution of the International Association of Volcanology and Chemistry of the Earth’s Interior. Bulletin of Volcanology, 84, Article No. 15. https://doi.org/10.1007/s00445-021-01509-5
Cas, R.A.F. (2019) IAVCEI: From Small Beginnings to a Vibrant International Association. History of Geo Space Sciences, 10, 181-191. https://doi.org/10.5194/hgss-10-181-2019
Wauthier, C., Smets, B. and Keir, D. (2015) Diking-Induced Moderate-Magnitude Earthquakes on a Youthful Rift Border Fault: The 2002 Nyiragongo-Kalehe Sequence, D.R. Congo. Geochemistry, Geophysics, Geosystems, 16, 4280-4291. https://doi.org/10.1002/2015GC006110
Durieux, J. (2002) Volcano Nyiragongo (D.R. Congo): Evolution of the Crater and Lava Lakes from the Discovery to the Present. Acta Vulcanologica, 14-15, 137-144.
Smets, B., d’Oreye, N., Kervyn, M. and Kervyn, F. (2017) Gas Piston Activity of the Nyiragongo Lava Lake: First Insights from a Stereographic Time-Lapse Camera System. Journal of African Earth Sciences, 134, 874-887. https://doi.org/10.1016/j.jafrearsci.2016.04.010
Minissale, S., Zanetti, A., Tedesco, D., Morra, V. and Melluso, L. (2019) The Petrology and Geochemistry of Nyiragongo Lavas of 2002, 2016, 1977 and 2017 AD, and the Trace Element Partitioning between Melilitite Glass and Melilite, Nepheline, Leucite, Clinopyroxene, Apatite, Olivine and Fe-Ti Oxides: A Unique Scenario. Lithos, 332-333, 296-311. https://doi.org/10.1016/j.lithos.2019.02.023
Giordano, D., Polacci, M., Longo, A., Papale, P., Dingwell, D.B., Boschi, E. and Kasereka, M. (2007) Thermo-Rheological Magma Control on the Impact of Highly Fluid Lava Flows at Mt. Nyiragongo. Geophysical Research Letters, 34, L06301. https://doi.org/10.1029/2006GL028459
Rogers, N., De Mulder, M. and Hawkesworth, C. (1992) An Enriched Mantle Source for Potassic Basanites: Evidence from Karisimbi Volcano, Virunga Volcanic Province, Rwanda. Contributions to Mineralogy and Petrology, 111, 543-556. https://doi.org/10.1007/BF00320908
Aoki, K.I., Yoshida, T., Yusa, K.A. and Nakamura, Y. (1985) Petrology and Geochemistry of the Nyamuragira Volcano, Zaire. Journal of Volcanology and Geothermal Research, 25, 1-28. https://doi.org/10.1016/0377-0273(85)90002-2
Demant, A., Lestrade, P., Lubala, R.T., Kampunzu, A.B. and Durieux, J. (1994) Volcanological and Petrological Evolution of Nyiragongo Volcano, Virunga Volcanic Field, Zaire. Bulletin of Volcanology, 56, 47-61. https://doi.org/10.1007/BF00279728
Pitcavage, E., Furman, T., Nelson, W.R., Kalegga, P.K. and Barifaijo, E. (2021) Petrogenesis of Primitive Lavas from the Toro Ankole and Virunga Volcanic Provinces: Metasomatic Mineralogy beneath East Africa’s Western Rift. Lithos, 396-397, 1-20.
Agama, B.I., Chazot, G.A. and Kamgang, P. (2022) Pure Forsterite in Nyiragongo Lavas: Evidence for Subsolidus Oxidation of Volcanic Rocks. Acta Geochimica, 41, 12-23. https://doi.org/10.1007/s11631-021-00513-y
Morrison, A.A., Whittington, A., Smets, B., Kervyn, M. and Sehlke, A. (2020) The Rheology of Crystallizing Basaltic Lavas from Nyiragongo and Nyamuragira Volcanoes, DRC. Volcanica, 3, 1-28. https://doi.org/10.30909/vol.03.01.0128
Wurman (2022) Mount Nyiragongo 2002. Global Volcanism Program, Smithsonian Institute, Washington DC, 1-8.
Venzke, E. (2017) Report on Nyiragongo (DR Congo). Bulletin of the Global Volcanism Network, 42, 1-9. https://doi.org/10.5479/si.GVP.BGVN201701-223030
Kampunzu, A. and Popoff, M. (1991) Distribution of the Main Phanerozoic African Rifts and Associated Magmatism: Introductory Notes. In: Kampunzu, A.B. and Lubala, R.T., Eds., Magmatism in Extensional Structural Settings, Springer, Berlin, 2-10. https://doi.org/10.1007/978-3-642-73966-8_1
Sequar, G.W. (2009) Neotectonics of the East African Rift System: New Interpretations from Conjunctive Analysis of Field and Remotely Sensed Datasets in the Lake Magadi Area, Kenya. ITC, Enschede, 1-22.
Acocella, V., Faccenna, C., Funiciello, R. and Rossetti, F. (1999) Sand-Box Modelling of Basement-Controlled Transfer Zones in Extensional Domains. Terra Nova-Oxford, 11, 149-156. https://doi.org/10.1046/j.1365-3121.1999.00238.x
Olivotos, S., Niedermann, S., Flügel, T., Mouslopoulou, V., Merchel, S., Cotterill, F., Bookhagen, B., Gartner, A., Rugel, G., Scharf, A., Nadeau, M.-J., Braucher, R. and Seiler, M. (2021) Quaternary Landscape Evolution in a Tectonically Active Rift Basin (Paleo-Lake Mweru, South-Central Africa). Geomorphology, 381, Article ID: 107669. https://doi.org/10.1016/j.geomorph.2021.107669
Pitcavage, E. (2020) Geochemical Investigations of Continental Rift Magmatism: A Case Study in East Africa’s Western Rift. Pennsylvania State University, State College.
Gurenko, A.A. and Sobolev, A.V. (2018) Can Orthopyroxene Be Present in the Source of Toro-Ankole, East African Rift, Kamafugites? Journal of Petrology, 59, 1517-1550. https://doi.org/10.1093/petrology/egy069
Platz, T., Foley, S.F. and André, L. (2004) Low-Pressure Fractionation of the Nyiragongo Volcanic Rocks, Virunga Province, D.R. Congo. Journal of Volcanology and Geothermal Research, 136, 269-295. https://doi.org/10.1016/j.jvolgeores.2004.05.020
Lustrino, M., Luciani, N. and Stagno, V. (2019) Fuzzy Petrology in the Origin of Carbonatitic/Pseudocarbonatitic Ca-Rich Ultrabasic Magma at Polino (Central Italy). Scientific Reports, 9, Article No. 9212. https://doi.org/10.1038/s41598-019-45471-x
Condomines, M., Carpentier, M. and Ongendangenda, T. (2015) Extreme Radium Deficit in the 1957 AD Mugogo Lava (Virunga Volcanic Field, Africa): Its Bearing on Olivine-Melilitite Genesis. Contributions to Mineralogy and Petrology, 169, Article No. 29. https://doi.org/10.1007/s00410-015-1124-9
Smets, B., Kervyn, M., d’Oreye, N. and Kervyn, F. (2015) Spatio-Temporal Dynamics of Eruptions in a Youthful Extensional Setting: Insights from Nyamulagira Volcano (D.R. Congo), in the Western Branch of the East African Rift. Earth-Science Reviews, 150, 305-328. https://doi.org/10.1016/j.earscirev.2015.08.008
Smets, B., Tedesco, D., Kervyn, F., Kies, A., Vaselli, O. and Yalire, M.M. (2010) Dry Gas Vents (“Mazuku”) in Goma Region (North-Kivu, Democratic Republic of Congo): Formation and Risk Assessment. Journal of African Earth Sciences, 58, 787-798. https://doi.org/10.1016/j.jafrearsci.2010.04.008
Albino, F., Smets, B., d’Oreye, N. and Kervyn, F. (2015) High-Resolution TanDEM-X DEM: An Accurate Method to Estimate Lava Flow Volumes at Nyamulagira Volcano (D. R. Congo). Journal of Geophysical Research: Solid Earth, 120, 4189-4207. https://doi.org/10.1002/2015JB011988
Sawyer, G.M., Carn, S.A., Tsanev, V.I., Oppenheimer, C. and Burton, M. (2008) Investigation into Magma Degassing at Nyiragongo Volcano, Democratic Republic of the Congo. Geochemistry, Geophysics, Geosystems, 9, Q02017. https://doi.org/10.1029/2007GC001829
Vaselli, O., Tassi, F., Tedesco, D., Cuoco, E., Nisi, B. and Yalire, M.M. (2007) Environmental Impact of the Nyiragongo Volcanic Plume after the January 2002 Eruption. Proceedings of the Active Volcanism and Continental Rifting, Luxembourg, 19-21 November 2007, 1-11.
Ryerson, F., Weed, H. and Piwinskii, A. (1988) Rheology of Subliquidus Magmas: 1. Picritic Compositions. Journal of Geophysical Research: Solid Earth, 93, 3421-3436. https://doi.org/10.1029/JB093iB04p03421
Vigneresse, J.L., Barbey, P. and Cuney, M. (1996) Rheological Transitions during Partial Melting and Crystallization with Application to Felsic Magma Segregation and Transfer. Journal of Petrology, 37, 1579-1600. https://doi.org/10.1093/petrology/37.6.1579
Biggs, J., Ayele, A., Fischer, T.P., Fontijn, K., Hutchison, W., Kazimoto, E., Whaler, K. and Wright, T.J. (2021) Volcanic Activity and Hazard in the East African Rift Zone. Nature Communications, 12, Article No. 6881. https://doi.org/10.1038/s41467-021-27166-y
Barrière, J., d’Oreye, N., Oth, A., Theys, N., Mashagiro, N., Subira, J., Kervyn, F. and Smets, B. (2019) Seismicity and Outgassing Dynamics of Nyiragongo Volcano. Earth and Planetary Science Letters, 528, Article ID: 115821. https://doi.org/10.1016/j.epsl.2019.115821
Smittarello, D., Smets, B., Barriere, J., Michellier, C., Oth, A., Shreve, T., Grandin, R., Theys, N., Brenot, H., Cayol, V., Allard, P., Caudron, C., Chevrel, O., Darchambeau, F., de Buyl, P., Delhaye, L., Derauw, D., Ganci, G., Geirsson, H., Kamate Kaleghetso, E., Kambale Makundi, J., Kambale Nguomoja, I., Kasereka Mahinda, C., Kervyn, M., Kimanuka Ruriho, C., Le Mevel, H., Molendijk, S., Namur, O., Poppe, S., Schmid, M., Subira, J., Wauthier, C., Yalire, M., d’Oreye, N., Kervyn, F. and Syavulisembo Muhindo, A. (2022) Precursor-Free Eruption Triggered by Edifice Rupture at Nyiragongo Volcano. Nature, 609, 83-88. https://doi.org/10.1038/s41586-022-05047-8
Putirka, K.D. (2008) Thermometers and Barometers for Volcanic Systems. Reviews in Mineralogy and Geochemistry, 69, 61-120. https://doi.org/10.1038/s41586-022-05047-8
Mallmann, G. and O’Neill, H.S.C. (2013) Calibration of an Empirical Thermometer and Oxybarometer Based on the Partitioning of Sc, Y and V between Olivine and Silicate Melt. Journal of Petrology, 54, 933-949. https://doi.org/10.1093/petrology/egt001
Arato, R. and Audetat, A. (2017) Experimental Calibration of a New Oxybarometer for Silicic Magmas Based on Vanadium Partitioning between Magnetite and Silicate Melt. Geochimica et Cosmochimica Acta, 209, 284-295. https://doi.org/10.1016/j.gca.2017.04.020
Arato, R. and Audetat, A. (2017) Vanadium Magnetite-Melt Oxybarometry of Natural, Silicic Magmas: A Comparison of Various Oxybarometers and Thermometers. Contributions to Mineralogy and Petrology, 172, Article No. 52. https://doi.org/10.1007/s00410-017-1369-6
Arato, R. and Audetat, A. (2017) FeTiMM—A New Oxybarometer for Mafic to Felsic Magmas. Geochemical Perspectives Letters, 5, 19-23. https://doi.org/10.7185/geochemlet.1740
Neal, C.A., Brantley, S., Antolik, L., Babb, J., Burgess, M., Calles, K., Cappos, M., Chang, J., Conway, S. and Desmither, L. (2019) The 2018 Rift Eruption and Summit Collapse of Kīlauea Volcano. Science, 363, 367-374. https://doi.org/10.1126/science.aav7046
Tang, Y., Tong, D.Q., Yang, K., Lee, P., Baker, B., Crawford, A., Luke, W., Stein, A., Campbell, P.C. and Ring, A. (2020) Air Quality Impacts of the 2018 Mt. Kilauea Volcano Eruption in Hawaii: A Regional Chemical Transport Model STUDY with satellite-Constrained Emissions. Atmospheric Environment, 237, Article ID: 117648. https://doi.org/10.1016/j.atmosenv.2020.117648
Anderson, K.R., Johanson, I.A., Patrick, M.R., Gu, M., Segall, P., Poland, M.P., Montgomery-Brown, E.K. and Miklius, A. (2019) Magma Reservoir Failure and the Onset of Caldera Collapse at Kīlauea Volcano in 2018. Science, 366, Article ID: 117648. https://doi.org/10.1016/j.atmosenv.2020.117648
Patrick, M.R., Dietterich, H.R., Lyons, J.J., Diefenbach, A.K., Parcheta, C. anderson, K.R., Namiki, A., Sumita, I., Shiro, B. and Kauahikaua, J.P. (2019) Cyclic Lava Effusion during the 2018 Eruption of Kīlauea Volcano. Science, 366, eaay9070. https://doi.org/10.1126/science.aay9070
Whitty, R.C., Ilyinskaya, E., Mason, E., Wieser, P.E., Liu, E.J., Schmidt, A., Roberts, T., Pfeffer, M.A., Brooks, B. and Mather, T.A. (2020) Spatial and Temporal Variations in SO2 and PM2.5 Levels around Kīlauea Volcano, Hawai’i during 2007-2018. Frontiers in Earth Science, 8, Article No. 36.
Garcia, M.O. (2002) Submarine Picritic Basalts from Koolau Volcano, Hawaii: Implications for Parental Magma Compositions and Mantle Source. Geophysical Monograph-American Geophysical Union, 128, 391-402. https://doi.org/10.1029/GM128p0391
Robertson, K., Simon, A., Pettke, T., Smith, E., Selyangin, O., Kiryukhin, A., Mulcahy, S. and Walker, J. (2013) Melt Inclusion Evidence for Magma Evolution at Mutnovsky Volcano, Kamchatka. Geofluids, 13, 421-439. https://doi.org/10.1111/gfl.12060
Jennings, E.S., Gibson, S.A., Maclennan, J. and Heinonen, J.S. (2017) Deep Mixing of Mantle Melts beneath Continental Flood Basalt Provinces: Constraints from Olivine-Hosted Melt Inclusions in Primitive Magmas. Geochimica et Cosmochimica Acta, 196, 36-57. https://doi.org/10.1016/j.gca.2016.09.015
Venugopal, S., Schiavi, F., Moune, S., Bolfan-Casanova, N., Druitt, T. and Williams-Jones, G. (2020) Melt Inclusion Vapour Bubbles: The Hidden Reservoir for Major and Volatile Elements. Scientific Reports, 10, Article No. 9034. https://doi.org/10.1038/s41598-020-65226-3
Cannatelli, C., Doherty, A.L., Esposito, R., Lima, A. and De Vivo, B. (2016) Understanding a Volcano through a Droplet: A Melt Inclusion Approach. Journal of Geochemical Exploration, 171, 4-19. https://doi.org/10.1016/j.gexplo.2015.10.003
Abersteiner, A., Kamenetsky, V.S., Goemann, K., Golovin, A.V., Sharygin, I.S., Pearson, D.G., Kamenetsky, M. and Gornova, M.A. (2019) Polymineralic Inclusions in Kimberlite-Hosted Megacrysts: Implications for Kimberlite Melt Evolution. Lithos, 336-337, 310-325. https://doi.org/10.1016/j.lithos.2019.04.004
Ashwal, L.D., Ziegler, A., Glynn, S., Truebody, T.A. and Bolhar, R. (2021) Sr-Enriched Glassy Picrites from Karoo Large Igneous Province Are Evolved, Not Primitive Magmatic Rocks. South African Journal of Geology, 2, 1-5. https://doi.org/10.1002/essoar.10503697.1
Ashwal, L.D. (2021) Sub-Lithospheric Mantle Sources for Overlapping Southern African Large Igneous Provinces. South African Journal of Geology, 124, 421-442. https://doi.org/10.1002/essoar.10503697.1
Jourdan, F., Bertrand, H., Scharer, U., Blichert-Toft, J., Féraud, G. and Kampunzu, A.B. (2007) Major and Trace Element and Sr, Nd, Hf, and Pb Isotope Compositions of the Karoo Large Igneous Province, Botswana-Zimbabwe: Lithosphere vs Mantle Plume Contribution. Journal of Petrology, 48, 1043-1077. https://doi.org/10.1093/petrology/egm010
Harris, C., le Roux, P., Cochrane, R., Martin, L., Duncan, A.R., Marsh, J.S., le Roex, A.P. and Class, C. (2015) The Oxygen Isotope Composition of Karoo and Etendeka Picrites: High δ18O Mantle or Crustal Contamination? Contributions to Mineralogy and Petrology, 170, Article No. 8. https://doi.org/10.1007/s00410-015-1164-1
Harris, P., Clifford, T. and Gass, I. (1970) African Magmatism and Tectonics. Oliver and Boyd Publisher, London, 419-437.
Kumarapeli, P. (1985) Vestiges of Lapetan Rifting in the Craton West of the Northern Appalachians. Geoscience Canada, 12, 54-59.
Nasir, S. and Klemd, R. (1998) New Carbonatite Occurrences along the Hatta Transform Fault Zone (Northern Oman Mountains, United Arab Emirates). Journal of African Earth Sciences, 27, 3-10. https://doi.org/10.1016/S0899-5362(98)00042-6
Baer, G., Hamiel, Y., Shamir, G. and Nof, R. (2008) Evolution of a Magma-Driven Earthquake Swarm and Triggering of the Nearby Oldoinyo Lengai Eruption, as Resolved by InSAR, Ground Observations and Elastic Modeling, East African Rift, 2007. Earth and Planetary Science Letters, 272, 339-352. https://doi.org/10.1016/j.epsl.2008.04.052
Hickey-Vargas, R., Roa, H.M., Escobar, L.L. and Frey, F.A. (1989) Geochemical Variations in Andean Basaltic and Silicic Lavas from the Villarrica-Lanin Volcanic Chain (39.5 S): An Evaluation of Source Heterogeneity, Fractional Crystallization and Crustal Assimilation. Contributions to Mineralogy and Petrology, 103, 361-386. https://doi.org/10.1007/BF00402922
Condie, K.C. (1985) Secular Variation in the Composition of Basalts: An Index to Mantle Evolution. Journal of Petrology, 26, 545-563. https://doi.org/10.1093/petrology/26.3.545
Harris, C., Smith, H.S. and le Roex, A.P. (2000) Oxygen Isotope Composition of Phenocrysts from Tristan da Cunha and Gough Island Lavas: Variation with Fractional Crystallization and Evidence for Assimilation. Contributions to Mineralogy and Petrology, 138, 164-175. https://doi.org/10.1007/s004100050015
Davies, G. and Macdonald, R. (1987) Crustal Influences in the Petrogenesis of the Naivasha Basalt—Comendite Complex: Combined Trace Element and Sr-Nd-Pb Isotope Constraints. Journal of Petrology, 28, 1009-1031. https://doi.org/10.1093/petrology/28.6.1009
Pearce, J.A., Baker, P.E., Harvey, P.K. and Luff, I.W. (1995) Geochemical Evidence for Subduction Fluxes, Mantle Melting and Fractional Crystallization beneath the South Sandwich Island Arc. Journal of Petrology, 36, 1073-1109. https://doi.org/10.1093/petrology/36.4.1073
Meen, J.K. (1990) Elevation of Potassium Content of Basaltic Magma by Fractional Crystallization: The Effect of Pressure. Contributions to Mineralogy and Petrology, 104, 309-331. https://doi.org/10.1007/BF00321487