Erupted cumulate fragments in rhyolites from Lipari (Aeolian Islands)

Forni, Francesca; Ellis, Ben; Lucchi, Federico; Tranne, Claudio Antonio; Agostini, Samuele; Dallai, Luigi

doi:10.1007/s00410-015-1201-0

Cited by 29 publications

(22 citation statements)

References 104 publications

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“…Magmatic evolution and textural development of the AD 1739 Pietre Cotte lava flow 3 1230 ±40 AD (Davì, 2007;Davì et al, 2009Davì et al, , 2010; date determined by archaeomagnetic dating of Arrighi et al 2006). Similar compositions and mingling textures have been identified in young rhyolitic lava flows on Vulcano, including the AD 1739 Pietre Cotte lava flow (Frazzetta et al, 1984; De Astis et al, 1997Astis et al, , 2013Piochi et al, 2009;Forni et al, 2015;Vetere et al, 2015;Nicotra et al, 2018).…”

Section: Accepted Manuscriptmentioning

confidence: 82%

“…Although extensive work has been undertaken on the Pietre Cotte magmatic system (Perugini et al, 2007;Piochi et al, 2009;Forni et al, 2015;Vetere et al, 2015;Nicotra et al, 2018), contrasting models exist on the conditions and textural evolution of enclaves within the rhyolitic host. It is not yet clear how the primary magma differentiated, how glomerocrysts are were entrained into the enclave magma, how many magmas interacted and at what depths in the preeruptive magma plumbing system these interactions occurred.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…It is not yet clear how the primary magma differentiated, how glomerocrysts are were entrained into the enclave magma, how many magmas interacted and at what depths in the preeruptive magma plumbing system these interactions occurred. Previous studies have addressed the magma chamber dynamics associated with the later stages of evolution of the Pietre Cotte lava flow (Perugini et al, 2007;Piochi et al, 2009;Forni et al, 2015;Vetere et al, 2015). Piochi et al (2009) modelled the processes of magma evolution based on field, textural and fractal data, major, trace and volatile element analyses, and incorporated petrological and fluid inclusion data from De Astis et al (1997), Gioncada et al (1998) and Frezzotti et al (2004).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…Vetere et al (2015) also observed variable enclave shapes, from highly-convoluted to near-rounded. Forni et al (2015) examined the composition and magmatic history of erupted cumulate fragments in the rhyolites on Lipari and Vulcano. The authors noted that, while the Pietre Cotte lava flow is considered to be representative of a latitic-to-trachytic magma interacting with a rhyolite, the crystallisation of Sr-rich plagioclase from latitic-to-trachytic magma would require extremely high plagioclase/melt partition coefficients for Sr, or extremely high Sr contents in the melt.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…1) preserves textural evidence for several stages of pre-eruptive processes, including magma mingling, providing an ideal system to investigate magma plumbing system dynamics. Mingling of evolved magma compositions has been identified in the Rocche Rosse rhyolitic lava flow on the neighbouring island of Lipari, Aeolian Islands (Davì, 2007;Davì et al, 2009Davì et al, , 2010Forni et al, 2015). The Rocche Rosse flow contains latitic-to-trachytic enclaves, originating from a deeper basaltic-shoshonitic chamber.…”

Section: Introductionmentioning

confidence: 99%

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Magmatic evolution and textural development of the 1739 CE Pietre Cotte lava flow, Vulcano, Italy

Bullock

Gertisser

O’Driscoll

et al. 2019

Journal of Volcanology and Geothermal Research

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Textural evidence from occurrences of mingled magmas in lava flows often yields insights into chemical and thermal disequilibrium between multiple magma batches at depth. An understanding of these interactions is key as they can occur on short timescales and may act as eruption triggers, particularly important in very active volcanic settings. This paper focuses on the Pietre Cotte lava flow (Vulcano, Aeolian Islands, Italy), a short (<1 km in length), texturally-heterogeneous rhyolitic extrusion on the northern slope of the active Fossa Cone. The occurrence of (i) multiple magma compositions, (ii) distinct magmatic cumulates (as glomerocrysts) and (iii) mineral resorption textures within glomerocrysts and isolated feldspar phenocrysts in the Pietre Cotte lava flow highlight a complex pre-eruptive magmatic history, including crystal mush remobilisation. Petrographic observations and mineral, bulk rock and glass geochemistry suggest that multiple mingling events occurred during the evolution of the Pietre Cotte magmatic system, evidenced by the recognition of the following components: (1) a remobilised predominantly mafic crystal mush, evident as macrocrysts (crystals >500 µm), which form glomerocrysts within enclaves, (2) a microlitic (<100 µm) trachytic enclave groundmass with microcrysts (100-500 µm), and (3) a rhyolitic glass, which hosts both the enclaves and the glomerocrysts. The macrocrystic mafic assemblage includes clinopyroxene (En 38-47 Wo 45-50 ; Mg# 0.72-0.89), olivine (Fo 49-66) and magnetite (Usp 7-26), with plagioclase (An 40-63 Ab 5-50) and rare alkali feldspar (Or 41-57) also present. Enclaves are comprised of a groundmass of plagioclase (An 43-47) and alkali feldspar (Or 33-57) microlites, with clinopyroxene microcrysts (En 39-42 Wo 47-51 ; Mg# 0.75-0.81) and trachyte groundmass glass. The rhyolitic host is characterised by glass, spherulites, microlites and enclave-derived macrocrysts.

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Section: Accepted Manuscriptmentioning

confidence: 82%

Section: Accepted Manuscriptmentioning

confidence: 99%

Section: Accepted Manuscriptmentioning

confidence: 99%

Section: Accepted Manuscriptmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Magmatic evolution and textural development of the 1739 CE Pietre Cotte lava flow, Vulcano, Italy

Bullock

Gertisser

O’Driscoll

et al. 2019

Journal of Volcanology and Geothermal Research

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The origin of microgranular enclaves in the Early Cretaceous Shuangjianzishan granites in southern Great Hinggan Range, NE China

Dai

Gao

et al. 2022

Geological Journal

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The microgranular enclaves (MEs) and their host granitoids contain vital information on the genesis and evolution of the magma, especially for those which have close relationship with mineralization, yet remains a hot debate on their origin. Here, we investigate the MEs and their host granitoids in the Shuangjianzishan (SJZ) deposits, southern Great Hinggan Range, NE China, using ziron U-Pb dating and Hf isotopes, along with a systematic analysis of whole-rock geochemical and Sr-Nd isotopic compositions. The SJZ MEs mainly consist of monzonites and quartz monzonites, and the SJZ granitoids comprise a suite of fine-grained syenogranites and coarse-grained monzogranites. The zircon U-Pb dating results suggest that the SJZ granitoids and the SJZ MEs were emplaced at approximately 143-141 Ma. Geochemical features and isotopic compositions of the SJZ granitoids indicate that they are mainly generated by partial melting of juvenile lower-crustal basaltic rocks. The fine-grained syenogranites and the coarsegrained monzogranites have a gradual contact relationship, similar crystallization age, Sr-, Nd-, and Hf-isotopic compositions, suggesting that they were derived from a similar silicic magma reservoir. According to the geochemical compositions and petrographic characteristics (aggregates of coarse-grained euhedral plagioclase crystals) of the SJZ granitoids, we infer that the monzogranites (SiO 2 = 69.24-74.95 wt%) are regarded as the residual cumulate and the fine-grained syenogranites (SiO 2 = 74.83-77.97 wt%) are high silica melts segregated from a crystal mush. The SJZ MEs are characterised by low SiO 2 (50.03-64.20 wt%) and MgO (1.08-2.63 wt%) contents, high P 2 O 5 contents and contain acicular apatite, which are consistent with the products of intermediate magma.Combining with the MEs have comparable crystallization age, mineral assemblage, whole-rock Sr-Nd and zircon Hf-isotopic compositions with their host granitoids, implying the MEs were autoliths related to their host monzogranites. Collectively, we infer that the SJZ MEs were generated by the rapid cooling and crystallization of the hot ascending intermediate magmas contacted with the cooler wall rocks, then those subsolid fine-grained crystal-rich margins were fragmented and injected into the progressive evolved mush chamber, leading to the extraction and upward percolation of high silicic melts from the compacting crystal-rich mush in the shallow crust.

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The Aeolian Arc

Peccerillo¹

2016

Cenozoic Volcanism in the Tyrrhenian Sea Region

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Erupted cumulate fragments in rhyolites from Lipari (Aeolian Islands)

Cited by 29 publications

References 104 publications

Magmatic evolution and textural development of the 1739 CE Pietre Cotte lava flow, Vulcano, Italy

Magmatic evolution and textural development of the 1739 CE Pietre Cotte lava flow, Vulcano, Italy

The origin of microgranular enclaves in the Early Cretaceous Shuangjianzishan granites in southern Great Hinggan Range, NE China

The Aeolian Arc

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