Pre-eruptive conditions at satellite vent eruptions at Teide-Pico Viejo complex (Tenerife, Canary Islands)

Dorado, Olaya; Andújar, Joan; Martı́, Joan; Geyer, Adelina

doi:10.1016/j.lithos.2021.106193

Cited by 7 publications

(6 citation statements)

References 52 publications

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“…For this reason, we argue that dissolution of this feldspar cumulate is most likely due to a temperature rise caused at the bottom of the reservoir by the intrusion and underplating of hotter magma (Couch et al, 2001;Wolff et al, 2015;D'Oriano et al, 2017;Landi et al, 2019). Processes like this have been previously documented for other eruptions in the T-PV volcanic complex (e.g., Pico Cabras dome eruption, Dorado et al, 2021).…”

Section: Identification Of Xenocryst Populations Within T-pv Lavassupporting

confidence: 59%

“…Petrological data suggest that interaction between a deep basaltic magma reservoir and a shallow phonolitic magmatic system has dominated the evolution of the T-PV complex. In fact, most phonolite units show evidence of magma mixing, and their eruptions were likely triggered by the intrusion of hotter magmas originating from deeper levels (Araña et al, 1994;Triebold et al, 2006;Wiesmaier et al, 2011;Albert et al, 2015b;Dorado et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Ba, Sr, and Rb feldspar/melt partitioning in recent eruptions from Teide-Pico Viejo volcanic complex, Tenerife: New insights into pre-eruptive processes

et al. 2023

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The behaviour of Group I and II elements during the petrogenesis of felsic igneous rocks is largely controlled by feldspar-liquid relationships. Numerous experimental studies have addressed plagioclase/melt element partitioning, with fewer studies devoted to potassium feldspar, and very few to albite-rich ternary-composition feldspar (An ∼ Or < Ab). However, the partition coefficient for Ba is known to increase by at least an order of magnitude through the crystallisation sequence sodic plagioclase–anorthoclase–potassium feldspar that is typical of sodic alkaline suites. Feldspars, glasses, and whole rocks in such suites may exhibit strong enrichments and depletions that can be used to track processes of crystal fractionation, cumulate formation, and cumulate recycling. Here, we review experimental feldspar/melt partitioning data for Ba, Sr, and Rb for all feldspars. Regression of available data provides expressions that appear to adequately model the compositional and temperature dependence of partition coefficients for albite-rich compositions. We have applied this model to feldspar and melt compositions of the products of several Holocene eruptions (Pico Viejo C, Pico Viejo H, Teide J2, Lavas Negras, Arenas Blancas, Montaña Rajada and Montaña Reventada) of the basanitic-phonolitic suite of the Teide-Pico Viejo volcanic system (Tenerife, Spain), using EPMA and LA-ICP-MS analyses. Comparing analysed feldspar/groundmass pairs with predicted partition coefficients obtained with the models provides a way of distinguishing between feldspars that are in or out of equilibrium with their host melt, and of reconstructing feldspar histories. The results demonstrate the existence of a distinct population of feldspars that had undergone accumulation, fusion and recrystallisation events, in Lavas Negras and Arenas Blancas flows. In addition, the anomalous trachytic composition of Montaña Reventada is due to melting of a feldspar-dominated cumulate. Application of these techniques to active magmatic systems will allow us a better understanding of different pre-eruptive processes, and ultimately improve volcanic hazard assessment.

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Section: Identification Of Xenocryst Populations Within T-pv Lavassupporting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Ba, Sr, and Rb feldspar/melt partitioning in recent eruptions from Teide-Pico Viejo volcanic complex, Tenerife: New insights into pre-eruptive processes

et al. 2023

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“…1). Younger, predominately effusive activity within the caldera formed two stratovolcanoes, Teide and Pico Viejo, as well as Montaña Blanca and other satellite vents (Ablay et al, 1995(Ablay et al, , 1998, which represent more explosive volcanism (García et al, 2012;Dorado et al, 2021). Along with monogenetic basaltic volcanism outside the caldera, the T-PV complex is the focus of most of the current activity on Tenerife, with 13 identified eruptions in the past ∼2 k.y.…”

Section: Geologic Backgroundmentioning

confidence: 99%

Unleashing alkali feldspar: Ra/Th ages and chemical and isotopic constraints on Holocene phonolite magmatism, Canary Islands

Brown

Ramos

Wolff

et al. 2022

Geology

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Accurately dating phenocrysts in Holocene volcanic rocks poses many challenges but is critical to placing magmatic processes that occur prior to eruption into a temporal framework. We dated alkali feldspar (i.e., orthoclase Or10 to Or46) crystals in four young phonolites from the Teide–Pico Viejo volcanic complex, Tenerife (Spain), using (226Ra)/(230Th) isotopes. Partition coefficients of Ra (DRa) and DRa/DBa of feldspars were predicted using an approach based on the lattice strain model, which yielded crystallization ages that overlap or predate known eruption ages for the Lavas Negras (ca. 1 ka), Montaña Blanca (ca. 2 ka), Arenas Blancas (ca. 2–4 ka), and Teide H (ca. 6 ka) phonolites. Crystallization of feldspar may occur up to the time of eruption, with >8 ka crystals also present, possibly suggesting extended magma differentiation times. However, feldspars yielding finite (226Ra)/(230Th) ages are mostly in equilibrium with the groundmass, unlike >8 ka crystals, which were therefore identified as antecrysts/xenocrysts. The 87Sr/86Sr ratios of feldspars indicate that crystallization predated late-stage assimilation, affecting 87Sr/86Sr ratios of some melts. The (226Ra)/(230Th) ages also constrain the tempo of phonolite magma evolution on Tenerife. Integration of (226Ra)/(230Th) ages with feldspar major elements, trace elements, and isotopes provides a powerful means for investigating crystallization histories using a dominant mineral that controls the overall magmatic evolution of phonolites on thousand-year time scales.

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“…The evolved endmember (ABP-F) is a phonolite originating from aphyric white pumices of the El Abrigo ignimbrite (González-García et al, 2022). Phonolites of similar composition are widespread in all ignimbritic units of the DHF (Bryan et al, 2002;Martí et al, 2020) as well as the Teide-Pico Viejo system (Ablay et al, 1998;Dorado et al, 2021) and are the result of protracted magma differentiation and storage in shallow (< 5 km) reservoirs of the Las Cañadas volcano, and in the currently active Teide-Pico Viejo system (Andújar et al, 2008(Andújar et al, , 2010. Phonolites are also present in La Palma and are occasionally involved in magma mixing events and represented in historical volcanism on the island (Johansen et al, 2005;Klügel et al, 2022).…”

Section: Starting Materialsmentioning

confidence: 99%

Chemical interdiffusion between Na-tephritic and phonolitic melts at different T, H2O and fO2

González-García,

Pohl,

Marxer

et al. 2024

Preprint

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The diffusive exchange of major elements in Na-series tephrite-phonolite diffusion couples with compositions relevant to Canary Islands magmatism were determined at 300 MPa and variable H2O concentrations (0.3 to 3.3 wt.%), temperature (1150 to 1300°C) and fO2 (NNO-1.5 to NNO+1.7). Composition-dependent effective binary diffusion coefficients (D) were determined from concentration-distance profiles. Results show a wide range of diffusivities for different cations, consistently following the sequence Na >> Al >> K ≥ Mg = Fe = Ca > Si > Ti, with a mild diffusivity contrast (0.2-0.8 log units) between tephritic and phonolitic melts. Na is the fastest component, with diffusivities falling ~1.0 log unit above those of Si for any given conditions. An anomalously fast Al diffusion is observed, with DAl falling ~0.4 log units above Si and ~0.6 log units below Na, suggesting a prevalence of Al-alkalis coupling across our range of run conditions. The relationships between log D and H2O content in melt for all cations in an intermediate composition are strongly non-linear and can be fitted using an exponential function, with a convergence in diffusion coefficients for different temperature with increasing H2O contents. Thus, Arrhenius analyses result in a decrease of activation energies from 222-293 at 1.7 wt% H2O to 48-112 kJ/mol at 3.0 wt% H2O. These results provide new data on chemical interdiffusion in Na-rich, highly alkaline melts and suggest that H2O contents play a key role in increasing the chemical efficiency of magma mixing at low temperatures. The obtained dataset is used to test chemical controls of magma mixing in the El Abrigo ignmimbrite, Tenerife, where banded pumices involving basanitic-tephritic to phonolitic magmas are common in several compositionally bimodal ignimbrite units.

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Pre-eruptive conditions at satellite vent eruptions at Teide-Pico Viejo complex (Tenerife, Canary Islands)

Cited by 7 publications

References 52 publications

Ba, Sr, and Rb feldspar/melt partitioning in recent eruptions from Teide-Pico Viejo volcanic complex, Tenerife: New insights into pre-eruptive processes

Ba, Sr, and Rb feldspar/melt partitioning in recent eruptions from Teide-Pico Viejo volcanic complex, Tenerife: New insights into pre-eruptive processes

Unleashing alkali feldspar: Ra/Th ages and chemical and isotopic constraints on Holocene phonolite magmatism, Canary Islands

Chemical interdiffusion between Na-tephritic and phonolitic melts at different T, H2O and fO2

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