A chlorite solid solution geothermometer the Los Azufres (Mexico) geothermal system

Cathelineau, ‪Michel; Nieva, David

doi:10.1007/bf00413350

Cited by 598 publications

(399 citation statements)

References 26 publications

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“…the proportion of Si and Fe Mg) increases with pressure. Similar trends are observed in chlorites (Cathelineau and Nieva 1985;Hillier and Velde 1991;De Caritat et al 1993), which correspond to a decrease of the amesite and an increase of the sudoite proportions with decreasing temperature (increase in Si, Al VI and (&, and decrease in Al IV and Fe Mg)). The pressure effect corresponds to a Si, (Fe Mg) decrease and an increase of Al IV , Al VI and & (Leoni et al 1998;Vidal et al 2001).…”

Section: Main Substitutions In Chlorite and Phengitesupporting

confidence: 76%

“…Moreover, octahedral contents lower than six are also observed in low-temperature chlorites devoid of signi®cant smectite or mica contamination (Leoni et al, 1998 and references therein). Therefore, chlorite octahedral vacancies calculated from EMPA analyses with the assumption that Fe 2 Fe total should be a real feature, at least at low-T, low-P conditions (Mc Dowell and Elders 1980;Cathelineau and Nieva 1985;Cathelineau and Izquierdio 1988;Hillier and Velde 1991;De Caritat et al 1993;Leoni et al 1998). In contrast, Guidotti et al (1994c) showed that the proportion of Fe 3 substituting for Al in mica is controlled by fO 2 (Fe 3 is minimal in rocks containing graphite).…”

Section: Main Substitutions In Chlorite and Phengitementioning

confidence: 99%

“…Moreover, their compositions have been experimentally shown to depend on the P±T conditions prevailing during their formation (Velde 1965;Cathelineau and Nieva 1985;Massonne and Schreyer 1987;Hillier and Velde 1991;Massonne and Szputka 1997;Leoni et al 1998;Vidal et al 2001). For these reasons, chlorite and phengite are good candidates for thermobarometric estimates.…”

Section: Introductionmentioning

confidence: 99%

“…For these reasons, chlorite and phengite are good candidates for thermobarometric estimates. Metamorphic pressures are often estimated from the Si content of phengites, and temperatures from the Al IV content of chlorites in diagenetic regimes (`375 C) (Cathelineau and Nieva 1985;Kranidiotis and MacLean 1987;Cathelineau and Izquierdio 1988;Jowett 1991;De Caritat et al 1993). However, systematic P±T estimates based on the compositions of associated chlorites and phengites have not been undertaken, although the compositional evolution of both minerals seems to be correlated with the metamorphic conditions (Worley et al 1997;Leoni et al 1998).…”

Section: Introductionmentioning

confidence: 99%

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Exhumation paths of high‐pressure metapelites obtained from local equilibria for chlorite–phengite assemblages

2000

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The compositional variation of phengite and chlorite pairs in rocks sampled across the metamorphic zonation of three different blueschist belts (Cycladic, Sambagawa and Schistes Lustre Âs) is characterized from the regional to the thin-section scale. The different sample suites show different compositional trends, but similar trends are observed at the regional and thin-section scale in the same unit. At the thin-section scale, several local chlorite±phengite equilibria involving minerals of different compositions can be identi®ed. These observations suggest that at temperature T`$ 550 C, equilibration of chlorite and phengite compositions with varying pressure and temperature is controlled by crystallization/recrystallization processes rather than by changing the composition of older grains by lattice diffusion. In some instances, the relative time of growth of the different phyllosilicate generations can be determined using microstructural criteria. The observed compositional variations are interpreted and quanti®ed in terms of pressure (P) and temperature (T) variations using new thermodynamic solution models accounting for the Tschermak, di/trioctahedral, and pyrophyllitic substitutions. Chlorite±phengite local equilibria constrain the shape of the exhumation P±T paths of the rocks under consideration. The assemblage chlorite±phengite±paragonite± albite±quartz±H 2 O can be used to constrain different P±T paths for Tinos and Sambagawa blueschists.

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Section: Main Substitutions In Chlorite and Phengitesupporting

confidence: 76%

Section: Main Substitutions In Chlorite and Phengitementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Exhumation paths of high‐pressure metapelites obtained from local equilibria for chlorite–phengite assemblages

2000

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“…(Naglik 2016) Chlorite is one of the most common silicates in variety of geological environments occurring as a product of metamorphism as well as hydrothermal or diagenetic rocks alteration (Jiang et al 1994). The relationship between chlorite chemical composition and physico-chemical conditions of its formation was observed by many authors (Cathelineau & Nieva 1985, Walshe 1986, Kranidiotis & McLean 1987, Cathelineau 1988, Vidal et al 2001, Inoue 2009). A new model published by Bourdelle et al (2013) is applicable for the chlorites formed at the wide range of temperatures (50-350°C) and under pressure lower than 4 kbars.…”

Section: Products Of Hydrothermal Alterationmentioning

confidence: 99%

Mineral assemblages as a record of the evolutionary history of the Pepper Mts. Shale Formation (the Holy Cross Mts.).

Naglik

Natkaniec‐Nowak

Heflik

2016

geol

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Abstract:The Pepper Mts. Shale Formation, consisting of: clayey shales, mudstones and sandstones, as one of the oldest unit of the Holy Cross Mts., was subjected to mineralogical and petrographical studies. In order to reconstruct the geological history of the succession, mineral assemblages were characterized from the genetic point of view. Pyrite and goethite taking a form of bacterial-cell pseudomorphoses, crystallized during sedimentation and/or diagenesis, while quartz, kaolinite, goethite and chlorite prove subsequent alteration due to the hydrothermal fluid circulation. Secondary sulphates occurring on the pyrite-bearing rock outcrops mark the way of weathering processes. According to the presented results, Cambrian sediments were affected by hot fluids, which caused mineral recomposition and maturing of organic matter.

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Fluid evolution in an Oceanic Core Complex: A fluid inclusion study from IODP hole U1309 D—Atlantis Massif, 30°N, Mid‐Atlantic Ridge

Castelain

McCaig

Cliff

2014

Geochem. Geophys. Geosyst.

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In the detachment mode of slow seafloor spreading, convex-upward detachment faults take up a high proportion of the plate separation velocity exposing gabbro and serpentinized peridotite on the seafloor. Large, long-lived hydrothermal systems such as TAG are situated off axis and may be controlled by fluid flow up a detachment fault, with the source of magmatic heat being as deep as 7 kmbsf. The consequences of such deep circulation for the evolution of fluid temperature and salinity have not previously been investigated. Microthermometry on fluid inclusions trapped in diabase, gabbro, and trondjhemite, recovered at the Atlantis Massif Oceanic Core Complex (30 N, Mid-Atlantic Ridge), reveals evidence for magmatic exsolution, phase separation, and mixing between hydrothermal fluids and previously phase-separated fluids. Four types of fluid inclusions were identified, ranging in salinity from 1.4 to 35 wt % NaCl, although the most common inclusions have salinities close to seawater (3.4 wt % NaCl). Homogenization temperatures range from 160 to >400 C, with the highest temperatures in hypersaline inclusions trapped in trondjhemite and the lowest temperatures in low-salinity inclusions trapped in quartz veins. The fluid history of the Atlantis Massif is interpreted in the context of published thermochronometric data from the Massif, and a comparison with the inferred circulation pattern beneath the TAG hydrothermal field, to better constrain the pressure temperature conditions of trapping and when in the history of exhumation of the rocks sampled by IODP Hole U1309D fluids have been trapped.

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A chlorite solid solution geothermometer the Los Azufres (Mexico) geothermal system

Cited by 598 publications

References 26 publications

Exhumation paths of high‐pressure metapelites obtained from local equilibria for chlorite–phengite assemblages

Exhumation paths of high‐pressure metapelites obtained from local equilibria for chlorite–phengite assemblages

Mineral assemblages as a record of the evolutionary history of the Pepper Mts. Shale Formation (the Holy Cross Mts.).

Fluid evolution in an Oceanic Core Complex: A fluid inclusion study from IODP hole U1309 D—Atlantis Massif, 30°N, Mid‐Atlantic Ridge

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