Origin of silicic volcanism in the Panamanian arc: evidence for a two-stage fractionation process at El Valle volcano

Hidalgo, Paulo J.; Vogel, Thomas A.; Rooney, Tyrone O.; Currier, Ryan; Layer, Paul W.

doi:10.1007/s00410-011-0643-2

Cited by 31 publications

(47 citation statements)

References 133 publications

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“…The successive appearance of relatively iron‐rich hornblende (Mg# ∼59–66) and magnetite in clinopyroxene hornblendite, clinopyroxene‐hornblende gabbro, hornblende gabbro, and leuco‐hornblende gabbro suppressed further iron enrichment and promoted alkali‐enrichment in the derivative melt. Hornblende fractionation has been considered as an effective process, which formed the calc‐alkaline intermediate magmas in many localities (e.g., Oshima‐Oshima volcano, NE Japan arc: Yamamoto ; Baru volcano, western Panama: Hidalgo et al, ; Bonanza arc section, Canada: Larocque & Canil, ; Chelan Complex, Washington Cascades: Dessimoz et al, ). Yagi and Takeshita () emphasized the effect of fractionation of hornblende in NE Japan, but its impact was limited to the early stage fractionation of Mg‐rich (Mg# ∼75) hornblende as found in the olivine‐hornblende clinopyroxenite.…”

Section: Discussionmentioning

confidence: 99%

Differentiation of a Hydrous Arc Magma Recorded in Melt Inclusions in Deep Crustal Cumulate Xenoliths from Ichinomegata Maar, NE Japan

Yanagida

Nakamura

Yasuda

et al. 2018

Geochem Geophys Geosyst

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The Ichinomegata maar, located in the back‐arc side of the northeastern Japan arc, erupted calc‐alkaline andesitic magma with abundant deep‐crustal and mantle xenoliths at about 60–80 ka. We investigated the relationship between fractionated solids and differentiated silicic melts at middle to lower crust conditions through petrologic analyses of hornblende‐bearing cumulate xenoliths and melt inclusions. The Sr and Nd isotope compositions are similar to those of the host magmas, suggesting their cognate origin. The crystallization sequence is determined to be olivine, spinel → clinopyroxene → hornblende, magnetite → plagioclase → apatite, based on the observation of texture and solid solution compositions. Of the five types of xenolith studied, the leuco‐hornblende gabbro preserved interstitial glass and melt inclusions with a silica content (SiO2) of 63.9–74.0 wt % and high water content (up to 8.1 wt %). Hornblende geobarometry indicates an equilibrium pressure of 0.39–0.64 GPa, which corresponds to a depth of 15–24 km. The delay of plagioclase crystallization due to high water content characterizes differentiation of the hydrous arc magma. We successfully constructed an internally consistent differentiation model of the corundum‐normative calc‐alkaline trend to the silicic melt inclusions, starting from primitive basalt via successive fractionation of a calculated wherlite and cumulate xenoliths. In middle to late stage differentiation, hornblende gabbros are the dominantly fractionated assemblages. Our results are consistent with published differentiation experiments of hydrous arc magmas and the lithology of the deep crust beneath the back arc of the NE Japan arc as estimated from seismic tomography.

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Section: Discussionmentioning

confidence: 99%

Differentiation of a Hydrous Arc Magma Recorded in Melt Inclusions in Deep Crustal Cumulate Xenoliths from Ichinomegata Maar, NE Japan

Yanagida

Nakamura

Yasuda

et al. 2018

Geochem Geophys Geosyst

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“…There are also Fe‐Ti oxides, olivine, quartz, amphibole, biotite, apatite, and zircon (Defant, Richerson et al., , Table ). The geological literature suggests that in the El Valle, porphyritic andesites with some trachytic textures are found, with phenocrysts of plagioclase, clinopyroxene, orthopyroxene, and titanomagnetite (Defant, Clark et al., ; Hidalgo et al., ). Plagioclase phenocrysts commonly having zoning are reported to be resorbed or embayed and have anhedral to euhedral forms (Defant, Clark et al., , p. 316).…”

Section: Discussionmentioning

confidence: 99%

“…Plagioclase phenocrysts commonly having zoning are reported to be resorbed or embayed and have anhedral to euhedral forms (Defant, Clark et al., , p. 316). There is also porphyritic dacitic lava with amphibole and plagioclase including dacites that are crystalline and hypocrystalline and can contain phenocrysts of zoned plagioclase, embayed quartz, biotite, Fe‐Ti oxides, and sphene (Defant, Clark et al., ; Hidalgo, ; Hidalgo et al., ). The fan of the El Valle has wide deposits from the pyroclastic flow of the El Hato dacitic ignimbrite unit toward the Pacific coast containing pumice fragments with phenocrysts of zoned and resorbed plagioclase, amphibole, quartz, and oxides (Hidalgo, ).…”

Section: Discussionmentioning

confidence: 99%

“…) have a similar geological history. Their middle Miocene to Quaternary volcanic units overlie the regional basement (Hoernle et al., in Hidalgo, Vogel, Rooney, Currier, & Layer, ). The Cordilleran geological formations related to this study with volcanic geological units are as follows: The El Valle, La Yeguada, San Pedrito, and Cañazas Formations.…”

Section: Introductionmentioning

confidence: 99%

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The earliest Panamanian pottery: Reconstructing production and distribution of Monagrillo ceramics through petrographic provenance analysis

Iizuka

2017

Geoarchaeology

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Monagrillo pottery (ca. 4500‐3200 14C yr B.P.) is the earliest in Panama and one of the first ceramics in the New World. It is found in two distinct site types: (1) shell‐bearing middens of the northeastern Azuero Peninsula and (2) rock shelters of the Pacific plains, foothils, and cordillera, and the Caribbean slopes of central Panama. Here, I present a study that sources Monagrillo ceramics using petrography to distinguish locally produced from transported wares. Results indicate that ceramics were mainly produced in two zones: northeastern Azuero, and the Pacific slopes around Río Grande. Diachronic changes in ceramic sources were not observed. A number of vessels found in the Pacific plains rock shelters in the intermediate area were wares transported from both production zones. Most ceramics from the Caribbean slopes were manufactured on the Pacific slopes. As the first systematic pottery sourcing project conducted in Panama, this research provides the basis for future evaluations of degrees of sedentism, patterns of human mobility, and exchange, which can improve the knowledge of the context of ceramic origins in New World tropics.

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“…Dacite and rhyolite are locally important lithologies, mostly present within the "younger" arc series. An episode of explosive andesiticdacitic volcanism occurred across the Sierra de Veraguas and Serranía de Tabasará in central Panama during Late Tertiary-Quaternary time, producing the La Yeguada volcanic complex (Defant et al, 1991a) and the El Valle caldera (Defant et al, 1991b;Hidalgo et al, 2011). The andesitic-dacitic volcanic center of Volcán Barú is the only active volcano in Panama (Sherrod et al, 2007).…”

Section: Panamanian Landscapementioning

confidence: 99%

Linking silicate weathering to riverine geochemistry—A case study from a mountainous tropical setting in west-central Panama

Harmon

Goldsmith

Harmon

et al. 2016

Geological Society of America Bulletin

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Chemical analyses from 71 watersheds across an ~450 km transect in west-centralPanama provide insight into controls on weathering and rates of chemical denudation and CO 2 consumption across an igneous arc terrain in the tropics. Stream and river compositions across this region of Panama are generally dilute, having a total dissolved solute value = 118 ± 91 mg/L, with bicarbonate and silica being the predominant dissolved species. Solute, stable isotope, and radio genic isotope compositions are consistent with dissolution of igneous rocks present in Panama by meteoric precipitation, with geochemical signatures of rivers largely acquired in their upstream regions. Comparison of a head water basin with its entire watershed observed considerably more runoff production from the high-elevation upstream portion of the catchment than in its much more spatially extensive downstream region. Rock alteration profiles document that weathering proceeds primarily by dissolution of feldspar and pyrox ene, with base cations effectively leached in the following sequence: Na > Ca > Mg > K. Control on water chemistry by bedrock lithology is indicated through a linking of elevated ([Na + K]/[Ca + Mg]) ratios in watersto a high proportion of catchment area silicic bedrock and low ratios to mafic bedrock. Sr-isotope ratios are dominated by basementderived Sr, with only very minor, if any, contribution from other sources. Cation weather-ing of Ca sil + Mg sil + Na + K spans about an order in magnitude, from 3 to 32 tons/km 2 /yr. Strong positive correlations of chemical denudation and CO 2 consumption are observed with precipitation, mean watershed elevation, extent of land surface forest cover, and physical erosion rate.

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Origin of silicic volcanism in the Panamanian arc: evidence for a two-stage fractionation process at El Valle volcano

Cited by 31 publications

References 133 publications

Differentiation of a Hydrous Arc Magma Recorded in Melt Inclusions in Deep Crustal Cumulate Xenoliths from Ichinomegata Maar, NE Japan

Differentiation of a Hydrous Arc Magma Recorded in Melt Inclusions in Deep Crustal Cumulate Xenoliths from Ichinomegata Maar, NE Japan

The earliest Panamanian pottery: Reconstructing production and distribution of Monagrillo ceramics through petrographic provenance analysis

Linking silicate weathering to riverine geochemistry—A case study from a mountainous tropical setting in west-central Panama

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