Operation of subduction factory and production of andesite

Tatsumi, Yoshiyuki; Takahashi, Takehiro

doi:10.2465/jmps.101.145

Cited by 30 publications

(13 citation statements)

References 53 publications

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“…This interpretation can be additionally supported by the elevated LILEs (e.g., Rb, Sr and Ba) relative neighbouring LREEs (La and Ce) and HFSEs (Nb and Ta) ( Fig. 7e-h), indicating that the enrichment process was closely related to the influx of fluids (e.g., Tatsumi and Takahashi, 2006). Although the the volcanic rocks underwent variable degrees of crystal fractionation, the ratios of trace elements with similar partition coefficients and radiogenic isotope compositions can be used to trace the nature of the mantle source, for they are insensitive to magmatic differentiation.…”

Section: Source Characteristics and Primary Meltsmentioning

confidence: 66%

Geochronology and geochemistry of Eocene-aged volcanic rocks around the Bafra (Samsun, N Turkey) area: Constraints for the interaction of lithospheric mantle and crustal melts

Temizel

Arslan

Yücel

et al. 2016

Lithos

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International audience40Ar-39Ar age, whole-rock chemical and Sr-Nd isotope data are presented for the post-collisional, Eocene (51.3-44.1 Ma)-aged volcanic rocks from the Bafra (Samsun) area in the western part of the Eastern Pontides (N Turkey) aiming to unravel their sources and evolutionary history. The studied Eocene volcanic rocks can be divided into two groups: analcime-bearing (tephritic lava flows and dykes) and analcime-free (basaltic to trachytic lava flows and basaltic dykes). The analcime-bearing volcanic rocks have a fine-grained porphyritic texture with clinopyroxene phenocrysts, whereas analcime-free volcanic rocks show a variety of textures including hyalo-microlitic microgranular porphyritic, intersertal, trachytic, fluidal and glomeroporphyritic. The volcanic rocks also show evidence of mineral-melt disequilibrium textures such as sieved, rounded and corroded plagioclases, partially melted and dissolved clinopyroxenes and poikilitic texture. Petrochemically, the parental magmas of the volcanic rocks evolved from alkaline to calc-alkaline lava suites and include high-K and shoshonitic compositions. They display enrichments in light rare earth and large ion lithophile elements such as Sr, K and Rb, as well as depletions in high field strength elements such as Nb, Ta, Zr and Ti, resembling subduction-related magmas. The analcime-bearing and -free volcanic rocks share similar incompatible element ratios and chondrite-normalised rare rearth element patterns, indicating that they originated from similar sources. They also have relatively low to moderate initial 87Sr/86Sr (0.7042 to 0.7051), high positive εNd(t) values (+ 0.20 to + 3.32), and depleted mantle Nd model ages (TDM1 = 0.63-0.93 Ga, TDM2 = 0.58–0.84 Ga). The bulk-rock chemical and Sr-Nd isotope features as well as the high Rb/Y and Th/Zr, but low Nb/Zr and Nb/Y ratios, indicate that the volcanic rocks were derived from a lithospheric mantle source that had been metasomatised by slab-derived fluids. Trace element modelling suggests that the parental magma(s) of the volcanic rocks represent mixtures of melts derived by low-degree (~ 5–10 %) partial melting of spinel-lherzolite (40–85%) and garnet-lherzolite (15–60 %) mantle sources. Sr-Nd isotopic modelling also suggests that a 25–35% lower crustal component was added in the parental magmas; AFC modelling additionally indicates minor upper crustal contamination during the evolution of the volcanic rocks. In conclusion, integration of the geochemical, petrologic and isotopic data with regional geology suggests that the analcime-bearing and -free volcanic rocks evolved from parental magma(s) derived from melts of a subcontinental lithospheric mantle and lower crustal sources

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Section: Source Characteristics and Primary Meltsmentioning

confidence: 66%

Geochronology and geochemistry of Eocene-aged volcanic rocks around the Bafra (Samsun, N Turkey) area: Constraints for the interaction of lithospheric mantle and crustal melts

Temizel

Arslan

Yücel

et al. 2016

Lithos

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“…La présente étude consiste à vérifier la validité environnementale de l'utilisation industrielle de l'andésite sur l'environnement et ce en évaluant la consommation énergétique de fabrication du ciment à base de roche andésitique. Les andésites sont des dépôts volcaniques riches en silice (53-63%) et de composition chimique et minéralogique variable [1][2]. Les propriétés physiques et mécaniques de l'andésite sont généralement satisfaisantes aux exigences acceptables pour leur utilisation dans divers domaines [3][4][5].…”

Section: Cmss-2017unclassified

Environmental and energy assessment of the use of Andesite in cement

Hamidi

Kacimi²,

Clastres

2018

MATEC Web Conf.

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Abstract. The present study is a contribution to the research of new sources of supply of additions and raw materials in order to valorize local materials in the manufacture of cement. It consists in checking the environmental validity of the industrial use of andesite by evaluating the energy consumption of manufacturing andesitic cement. This evaluation was made on CEMI 52.5R type cement mortars whose basic constituent is clinker, with substitution rates of raw and calcined andesitic rock at 800 °C varying from 0-40%. and this through mechanical performance tests at several deadlines (2 days, 7 days, 28 days and 90 days). The results show that the analysis of the influence on the environment of this addition, in its raw state or calcined at 800 ° C, made it possible to say that globally the impact of andesite on the matrices seems positive to long term. The replacement of the cement by andesite systematically induces a reduction in the energy required to produce one ton of binder, due to the lower energy demand for grinding than that required for the thermal treatment of the clinker. Overall, the energy cost of andesite cement (in kWh per MPa compressive strength) is lower than that of ordinary cement for low rates of clinker replacement and obtaining cements with moderate strengths.

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Section: Cmss-2017unclassified

Environmental and energy assessment of the use of Andesite in cement

Hamidi

Kacimi²,

Clastres

2018

MATEC Web Conf.

View full text Add to dashboard Cite

The present study is a contribution to the research of new sources of supply of additions and raw materials in order to valorize local materials in the manufacture of cement. It consists in checking the environmental validity of the industrial use of andesite by evaluating the energy consumption of manufacturing andesitic cement. This evaluation was made on CEMI 52.5R type cement mortars whose basic constituent is clinker, with substitution rates of raw and calcined andesitic rock at 800 °C varying from 0-40%. and this through mechanical performance tests at several deadlines (2 days, 7 days, 28 days and 90 days). The results show that the analysis of the influence on the environment of this addition, in its raw state or calcined at 800 ° C, made it possible to say that globally the impact of andesite on the matrices seems positive to long term. The replacement of the cement by andesite systematically induces a reduction in the energy required to produce one ton of binder, due to the lower energy demand for grinding than that required for the thermal treatment of the clinker. Overall, the energy cost of andesite cement (in kWh per MPa compressive strength) is lower than that of ordinary cement for low rates of clinker replacement and obtaining cements with moderate strengths.

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Operation of subduction factory and production of andesite

Cited by 30 publications

References 53 publications

Geochronology and geochemistry of Eocene-aged volcanic rocks around the Bafra (Samsun, N Turkey) area: Constraints for the interaction of lithospheric mantle and crustal melts

Geochronology and geochemistry of Eocene-aged volcanic rocks around the Bafra (Samsun, N Turkey) area: Constraints for the interaction of lithospheric mantle and crustal melts

Environmental and energy assessment of the use of Andesite in cement

Environmental and energy assessment of the use of Andesite in cement

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