Interaction of mantle-derived magma with island crust? Trace element and oxygen isotope data from the Diego Hernandez Formation, Las Cañadas, Tenerife

Wolff, J. A.; Grandy, J.S; Larson, Peter B.

doi:10.1016/s0377-0273(00)00230-4

Cited by 64 publications

(27 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1a), and higher Nb/Ta ratios. These features are consistent with a history of titanite fractionation observed in most Diego Hernández phonolites (Wolff and Storey, 1984;Wolff et al, 2000;Edgar et al, 2007). Hybrid phonolite values plot between high-and low-Zr end members for all elements and ratios ( Fig 1a, Table 1).…”

Section: Glass Chemistrysupporting

confidence: 85%

Partitioning of rare earth and high field strength elements between titanite and phonolitic liquid

Olin

Wolff

2012

Lithos

View full text Add to dashboard Cite

We present the results of a LA-ICPMS study of titanites and associated glasses from the mixed-magma phonolitic Fasnia Member of the Diego Hernández Formation, Tenerife, Canary Islands. We employ a method of identifying equilibrium mineral-melt pairs from natural samples using REE contents and a linear form of the lattice strain model equation (Blundy and Wood, 1994), where the Young's modulus (E M ) for the 7-fold coordinated site is an output variable. For felsic magmas that contain crystals potentially derived from a variety of environments within the system, this approach is more rigorous than the use of solely textural criteria such as mineral-glass proximity.We then estimate titanite/melt partition coefficients for Y, Zr, Nb, REE, Hf, Ta, U and Th. In common with prior studies, we find that middle REE partition more strongly into titanite than either light or heavy REE, and that REE partitioning behavior in titanite is reasonably predicted by the lattice strain model. Titanite also fractionates Y from Ho, Zr from Hf, and Nb from Ta. Comparison with experimental data indicates that melt structure effects on partitioning are significant, most particularly in very highly polymerized melts. We use the data to estimate 7-fold coordination radii for trivalent Pr, Nd, Ho, Tm and Lu, and to make approximate predictions of titanite/melt partitioning of Ra, Ac and Pa. Interpolation of data for heavy REE does not predict the behavior of Y, indicating that factors other than charge and radius are involved in partitioning. Variations in Y/Ho induced by magmatic processes appear to be negatively correlated with temperature, and are expected to be greatest in near-minimum melts.

show abstract

Section: Glass Chemistrysupporting

confidence: 85%

Partitioning of rare earth and high field strength elements between titanite and phonolitic liquid

Olin

Wolff

2012

Lithos

View full text Add to dashboard Cite

show abstract

“…Deposits of the Poris eruption have recently been recognized more extensively across Tenerife (Brown 2001;Brown et al 2003), including correlative deposits within the Diego Hernandez Formation on the caldera wall and on northern flanks (Wolff et al 2000;Edgar et al 2002), and the geochemistry has been described (Edgar et al 2002). The present paper focuses on the main Poris depocentre, the Bandas del Sur.…”

Section: Geological Backgroundmentioning

confidence: 96%

Event-stratigraphy of a caldera-forming ignimbrite eruption on Tenerife: the 273 ka Poris Formation

Brown

Branney

2003

Bull Volcanol

View full text Add to dashboard Cite

The 273 ka Poris Formation in the Bandas del Sur Group records a complex, compositionally zoned explosive eruption at Las Caaeadas caldera on Tenerife, Canary Islands. The eruption produced widespread pyroclastic density currents that devastated much of the SE of Tenerife, and deposited one of the most extensive ignimbrite sheets on the island. The sheet reaches~40-m thick, and includes Plinian pumice fall layers, massive and diffuse-stratified pumiceous ignimbrite, widespread lithic breccias, and co-ignimbrite ashfall deposits. Several facies are fines-rich, and contain ash pellets and accretionary lapilli. Eight brief eruptive phases are represented within its lithostratigraphy. Phase 1 comprised a fluctuating Plinian eruption, in which column height increased and then stabilized with time and dispersed tephra over much of the southeastern part of the island. Phase 2 emplaced three geographically restricted ignimbrite flowunits and associated extensive thin co-ignimbrite ashfall layers, which contain abundant accretionary lapilli from moist co-ignimbrite ash plumes. A brief Plinian phase (Phase 3), again dispersing pumice lapilli over southeastern Tenerife, marked the onset of a large sustained pyroclastic density current (Phase 4), which then waxed (Phase 5), covering increasingly larger areas of the island, as vents widened and/or migrated along opening caldera faults. The climax of the Poris eruption (Phase 6) was marked by widespread emplacement of coarse lithic breccias, thought to record caldera subsidence. This is inferred to have disturbed the magma chamber, causing mingling and eruption of tephriphonolite magma, and it changed the proximal topography diverting the pyroclastic density current(s) down the Güimar valley (Phase 7). Phase 8 involved post-eruption erosion and sedimentary reworking, accompanied by minor down-slope sliding of ignimbrite. This was followed by slope stabilization and pedogenesis. The fines-rich lithofacies with abundant ash pellets and accretionary lapilli record agglomeration of ash in moist ash plumes. They resemble phreatomagmatic deposits, but a phreatomagmatic origin is difficult to establish because shards are of bubble-wall type, and the moisture may have arisen by condensation within ascending thermal co-ignimbrite ash plumes that contained atmospheric moisture enhanced by that derived from the evaporation of seawater where the hot pyroclastic currents crossed the coast. Ash pellets formed in co-ignimbrite ash-clouds and then fell through turbulent pyroclastic density currents where they accreted rims and evolved into accretionary lapilli.

show abstract

“…2a). The explosive eruptions, however, involve shallow phonolitic magma chambers developed in the centre of the island (Mitjavila and Villa 1993;Martí et al 1994;Bryan et al 1998;Marti and Gudmundsson 2000;Wolff et al 2000;Edgar 2003).…”

Section: Magma Chambersmentioning

confidence: 99%

On the detectability of Teide volcano magma chambers (Tenerife, Canary Islands) with magnetotelluric data

Piña-Varas

Ledo

Queralt

et al. 2018

Earth Planets Space

View full text Add to dashboard Cite

Tenerife has been the subject of numerous studies covering a wide range of fields. Many studies have been focused on characterising the magmatic plumbing system. Even so, a controversy still exists regarding the location and size of the current magma chambers. Several magnetotelluric (MT) surveys have been carried out in the island, but no conductivity anomalies associated with the chambers have been detected. We report the results of a set of tests conducted against the 3-D resistivity model of the island, to determine the characteristics of the detectable chambers with the MT data. The most remarkable results indicate that the MT dataset is incompatible with a large-scale mafic reservoir located at shallower depths than 8 km b.s.l. However, shallower phonolitic chambers smaller than 3 × 3 × 1 km 3 could be undetected by the existing MT sites and new data should be acquired to confirm or not their existence. This new information is essential in volcanic islands like Tenerife, since many volcanic hazards are related to the size and depth of the sources of magma. Additionally, a joint interpretation of the obtained results together with other information is summarised in a hypothetical model, allowing us to better understand the internal structure of the island.

show abstract

Interaction of mantle-derived magma with island crust? Trace element and oxygen isotope data from the Diego Hernandez Formation, Las Cañadas, Tenerife

Cited by 64 publications

References 63 publications

Partitioning of rare earth and high field strength elements between titanite and phonolitic liquid

Partitioning of rare earth and high field strength elements between titanite and phonolitic liquid

Event-stratigraphy of a caldera-forming ignimbrite eruption on Tenerife: the 273 ka Poris Formation

On the detectability of Teide volcano magma chambers (Tenerife, Canary Islands) with magnetotelluric data

Contact Info

Product

Resources

About