Event stratigraphy and emplacement mechanisms of the last major caldera eruption on Sete Cidades Volcano (São Miguel, Azores): the 16 ka Santa Bárbara Formation

Porreca, Massimiliano; Pimentel, Adriano; Kueppers, Ulrich; Izquierdo, Tatiana; Pacheco, José; Queiroz, G.

doi:10.1007/s00445-018-1250-0

Cited by 11 publications

(25 citation statements)

References 79 publications

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“…The Santa Bárbara Formation (SBF) results from the last major explosive eruption of 7C volcano and is related to the final phase of caldera-enlarging. Its deposits are mainly preserved along a narrow area between the caldera rim and the coastline (<5 km distance), while a large portion of the pyroclastic products were deposited into the ocean (Kueppers et al, 2009;Porreca et al, 2018).…”

Section: Overview Of the Santa Bárbara Formationmentioning

confidence: 99%

“…(F) General aspect of layered units from a recent (<5 ky) pumice fall deposit near the Vista do Rei viewpoint; outcrop D for sample 7C07 (spring catchment for scale). For details of (A-C) see Porreca et al (2018).…”

Section: Overview Of the Santa Bárbara Formationmentioning

confidence: 99%

“…Several intercalated ash-rich horizons indicate that the eruption column at times experienced unsteadiness. The detailed stratigraphy and eruption history of the SBF are described in Queiroz et al (2015) and more recently in Porreca et al (2018).…”

Section: Overview Of the Santa Bárbara Formationmentioning

confidence: 99%

“…The last paroxysmal eruption was related to the caldera-enlarging event dated at ∼16 ka BP (Queiroz, 1997) and is recorded by the Santa Bárbara Formation (SBF) -the present case study. Its stratigraphy and emplacement mechanisms have been recently reanalyzed in detail by Porreca et al (2018). In the last 5 ky, at least 17 explosive eruptions from within the summit caldera have been recognized in the stratigraphic record (Queiroz, 1997;Queiroz et al, 2008Queiroz et al, , 2015.…”

Section: Introductionmentioning

confidence: 99%

“…The reconstruction of the past eruptions of 7C volcano has been, in most cases, limited to proximal areas (i.e., on the edifice of 7C volcano) due to the short distance between the caldera rim and the coast (<2-5 km) and the overlying products from the adjacent basaltic fissure system (see Queiroz et al, 2008;Porreca et al, 2018). Based on isopach and isopleth maps, Cole et al (2008) reconstructed eruptive source parameters of three recent (<5 ky) intra-caldera eruptions and modeled tephra dispersal to assess the associated hazard.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Biased Volcanic Hazard Assessment Due to Incomplete Eruption Records on Ocean Islands: An Example of Sete Cidades Volcano, Azores

et al. 2019

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Section: Overview Of the Santa Bárbara Formationmentioning

confidence: 99%

Section: Overview Of the Santa Bárbara Formationmentioning

confidence: 99%

Section: Overview Of the Santa Bárbara Formationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Biased Volcanic Hazard Assessment Due to Incomplete Eruption Records on Ocean Islands: An Example of Sete Cidades Volcano, Azores

et al. 2019

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Pre-eruptive conditions and triggering mechanism of the ~ 16 ka Santa Bárbara explosive eruption of Sete Cidades Volcano (São Miguel, Azores)

Laeger

Petrelli

Morgavi

et al. 2019

Contrib Mineral Petrol

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Deficiency of essential elements in volcanic soils: potential harmful health effects on grazing cattle

Linhares

Pimentel

Garcia

et al. 2021

Environ Geochem Health

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Several essential nutrients such as Fe, Co, Cu, I, Se, and Zn are vital to grazing cattle as they play a significant role in intracellular enzyme systems, with antioxidant and repair functions of DNA lesions. Feeds may supply most essential nutrients in adequate amounts. However, essential nutrient deficiencies are common and are mainly related to the geochemical characteristics of the soils, inherited from parent rocks. This study aims to assess the concentrations of the selected essential nutrients in topsoils and pasture grass from Sa ˜o Miguel Island (Azores) and discuss the possible effects of its deficiency in grazing cattle health. Sixty-eight samples of agricultural (pastures) topsoil and thirty samples of pasture grass were collected throughout Sa ˜o Miguel Island in areas with basaltic and trachytic parent rocks. Soil physicochemical properties and geochemical baselines of selected elements were determined on composite samples of soil and pasture grass in each site. Results indicate that the highest concentrations of the selected essential nutrients were observed in areas with basaltic soils, while the lowest values were found in areas with trachytic soils. These differences are considered of geogenic origin since they result from the weathering of volcanic parent rocks with different geochemical compositions. Data indicate a lack of some essential nutrients in topsoils (Co and Se) and/or pasture grass (Co, Cu, Se, and Zn) that can contribute to harmful health effects on grazing cattle. The uneven distribution of essential nutrients in topsoil and pasture grass and their deficiency can lead to several health problems in the cattle since these elements regulate

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Event stratigraphy and emplacement mechanisms of the last major caldera eruption on Sete Cidades Volcano (São Miguel, Azores): the 16 ka Santa Bárbara Formation

Cited by 11 publications

References 79 publications

Biased Volcanic Hazard Assessment Due to Incomplete Eruption Records on Ocean Islands: An Example of Sete Cidades Volcano, Azores

Biased Volcanic Hazard Assessment Due to Incomplete Eruption Records on Ocean Islands: An Example of Sete Cidades Volcano, Azores

Pre-eruptive conditions and triggering mechanism of the ~ 16 ka Santa Bárbara explosive eruption of Sete Cidades Volcano (São Miguel, Azores)

Deficiency of essential elements in volcanic soils: potential harmful health effects on grazing cattle

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