The last 5000 years of activity at Sete Cidades volcano (São Miguel Island, Azores): Implications for hazard assessment

Queiroz, G.; Pacheco, José; Gaspar, J. L.; Aspinall, Willy; Guest, J. E.; Ferreira, Teresa

doi:10.1016/j.jvolgeores.2008.03.001

Cited by 58 publications

(45 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7.16). The main features of the eruptions are described in Queiroz et al (2008) and Cole et al (2008), and are summarized in Table 7.2. According to their eruptive character, they may be subdivided into three main groups (Queiroz 1997).…”

Section: Sete Cidades Volcano Eruptive Historymentioning

confidence: 99%

“…Alongside the trachytic explosive activity which was centred in the caldera, more than 12 basaltic eruptions have occurred on the outer flanks of the central volcano during the last 5 ka (Queiroz 1997;Queiroz et al 2008 Other prominent scoria cones formed in this period were Pico de Mafra and Ginetes. Their age is uncertain but stratigraphically they are positioned between the P1 and P2 deposits.…”

Section: Flank Eruptionsmentioning

confidence: 99%

“…This has been discussed in Queiroz et al (2008) through the definition of an 'event tree', following the methodology of Newhall & Hoblitt (2002). Cole et al (2008) modelled in a probabilistic manner the ashfall from P11 and P17 considering that these eruptions are, respectively, the worst-case and best-case scenarios for a future event.…”

Section: Final Remarksmentioning

confidence: 99%

See 2 more Smart Citations

Chapter 7 Eruptive history and evolution of Sete Cidades Volcano, São Miguel Island, Azores

Queiroz

Gaspar

Guest

et al. 2015

Memoirs

Self Cite

View full text Add to dashboard Cite

Sete Cidades is an active central volcano on the western part of São Miguel. The geological record reveals that subaerial activity started more than 250 ka ago. Stratigraphic units defined for Sete Cidades deposits reflect major events in the history of the volcano and are organized into two main groups: the Inferior Group and the Superior Group. Caldera formation resulted from three major paroxysmal events that occurred at about 36, 29 and 16 ka ago. Analysis of the eruptive history of Sete Cidades shows that effusive or moderately explosive eruptions, of Hawaiian and/or Strombolian styles, were located on the slopes of the central volcano. Conversely, trachytic explosive activity is mostly centred inside the caldera involving, in a first stage, predominantly Plinian and sub-Plinian phenomena, changing about 5 ka ago to a dominant hydromagmatic style. Trachytic effusive eruptions are represented by domes and associated lava flows that crop out in the inner caldera walls and on the western slopes of the volcano. Offshore submarine activity is represented by the historic Surtseyan eruptions of 1638 and 1811. In the last 5 ka Sete Cidades was the most active central volcano in the Azores with 17 explosive eruptions predominantly with hydromagmatic character. Scoria conesThese are the most common volcanic edifices on Sete Cidades massif and were formed as a result of the accumulation of basaltic † Deceased 19 May 2012.

show abstract

Section: Sete Cidades Volcano Eruptive Historymentioning

confidence: 99%

Section: Flank Eruptionsmentioning

confidence: 99%

See 1 more Smart Citation

Chapter 7 Eruptive history and evolution of Sete Cidades Volcano, São Miguel Island, Azores

Queiroz

Gaspar

Guest

et al. 2015

Memoirs

Self Cite

View full text Add to dashboard Cite

show abstract

“…Sete Cidades Volcano (Queiroz 1997;Queiroz et al 2008Queiroz et al , 2015 is located at the western end of São Miguel Island (Fig. 6.2), and its formation started before 210 ka BP (Moore 1990).…”

Section: Sete Cidades Volcanomentioning

confidence: 99%

Chapter 6 Volcano-tectonic structures of São Miguel Island, Azores

Carmo

Madeira

Ferreira

et al. 2015

Memoirs

Self Cite

View full text Add to dashboard Cite

The Azores archipelago is located at the triple junction between the Eurasia, Nubia and North America lithospheric plates. São Miguel Island, situated at the southeastern part of the western segment of the Azores-Gibraltar Fracture Zone, presents an east-west elongated shape, comprising three quiescent central volcanoes with summit calderas linked by zones of fissure volcanism. The eastern part of the island is older and inactive. Active faulting is represented by prominent fault scarps that constitute important extensional structures, or by linear volcanic structures in fissural volcanic zones, with a dominant NW-SE to WNW-ESE trend. Although less frequent, there are also NNW-SSE to north-south, NE-SW and east-west faults, reflected by some volcanic alignments and linear segments of the drainage system and sea cliffs. The geometric and kinematic data are in agreement with that observed in the rest of the archipelago. However, at eastern São Miguel Island data indicate two distinct groups of conjugated faults characterized by three-dimensional strain: NW-SE to WNW-ESE normal dextral structures are conjugated with NNW-SSE normal left-lateral faults and NW-SE to WNW-ESE normal left-lateral faults are conjugated with NE-SW normal dextral structures, showing the presence of two different stress fields separated in time.

show abstract

“…For example, very little glass shard data are available from Quaternary eruptions of the volcanoes in the Canaries and Azores archipelagos. Both centres are reported to have had multiple caldera-forming eruptions during the Late Quaternary (Ablay and Martí, 2000;Queiroz et al, 2008;Gertisser et al, 2010) and lie within a few thousand kilometres of Morocco and within a westerly atmospheric circulation pattern that would suggest these as a likely source for tephra in sites across NW Africa. The discovery of four cryptotephra horizons at Taforalt, from likely Atlantic and Mediterranean volcanoes, as well as hints of tephra within the stratigraphy of Dar es-Soltane 1 and Rhafas, indicate future potential for linking MSA and LSA archaeological sites across and beyond the Maghreb.…”

Section: Correlating Between Archivesmentioning

confidence: 99%

The role of cryptotephra in refining the chronology of Late Pleistocene human evolution and cultural change in North Africa

Barton

Lane

Albert

et al. 2015

Quaternary Science Reviews

View full text Add to dashboard Cite

The last 5000 years of activity at Sete Cidades volcano (São Miguel Island, Azores): Implications for hazard assessment

Cited by 58 publications

References 16 publications

Chapter 7 Eruptive history and evolution of Sete Cidades Volcano, São Miguel Island, Azores

Chapter 7 Eruptive history and evolution of Sete Cidades Volcano, São Miguel Island, Azores

Chapter 6 Volcano-tectonic structures of São Miguel Island, Azores

The role of cryptotephra in refining the chronology of Late Pleistocene human evolution and cultural change in North Africa

Contact Info

Product

Resources

About