Calcite–dolomite geothermometry in the system CaCO3–MgCO3–FeCO3: an experimental study

Powell, Roger; Condliffe, Diana M.; Condliffe, Eric

doi:10.1111/j.1525-1314.1984.tb00283.x

Cited by 86 publications

(34 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…XRD was used to determine the MgCO 3 content in calcite as it has been reported as the most accurate method for the determination of MgCO 3 content in magnesian calcite (Goldsmith and Newton 1969). It is often difficult to determine the composition of many run-products using electron microprobe (EMPA) because of their fine-grained nature (Powell et al, 1984) while inter-planar spacings (d-values) are sensitive to compositional variations; therefore, to avoid erroneous results e.g., in the case of coherent submicroscopic intergrowths, XRD was used. For XRD, marble samples were powdered using a mortar and pestle system and back-filled into glass sample-holders or evenly spread over the surface of a glass slide using a small amount of acetone.…”

Section: Characterization Methodsmentioning

confidence: 99%

Metamorphic temperature investigation of coexisting calcite and dolomite marble––examples from Nikani Ghar marble and Nowshera Formation, Peshawar Basin, Pakistan

et al. 2016

View full text Add to dashboard Cite

INTRODUCTIONDetermining peak metamorphic temperature of low grade rocks has always been a challenge. X-ray diffraction (XRD) is an established technique for the determination of constituent phases in solid-solution series. Differences in ionic sizes between substitute and host cations lead to systematic variations in unit-cell parameters and inter-planar spacings that can be measured using XRD. This approach has been widely used in analyzing rhombohedral Ca-Mg carbonates, for example, the composition of biogenic and inorganic (Ca, Mg)CO 3 crystals are often calculated by comparing the difference in d 104 value with the published determinative curves (Zhang et al., 2010;Raz et al., 2000; Falini et al., 1996; Bischoff et al., 1983;Milliman et al., 1971). At least five empirical curves are currently known in the literature (Bischoff et al., 1983;Milliman et al., 1971;Goldsmith et al., 1961Goldsmith et al., , 1955Goldsmith and Graf, 1958; Chave, 1952). Determinative curves based on synthetic magnesian calcite crystals are probably the most widely used (Milliman et al., 1971;Goldsmith et al., 1961;Goldsmith and Graf, 1958).Owing to the abundance of calcite and dolomite in the Earth's crust, knowledge of their limits of stability can be used to assess the conditions of temperature prevailing during their formation and subsequent metamorphism. The calcite-dolomite solvus in the system CaCO 3 -MgCO 3 was first investigated by Graf and Goldsmith (1955) and Harker and Tuttle (1955). They recognized that the temperature dependence of the amount of MgCO 3 in calcite in equilibrium with dolomite is potentially a precise method of estimating metamorphic temperatures. Goldsmith (1958, 1955) and Goldsmith et al., (1955) used XRD to determine the MgCO 3 content in natural and synthetic samples to establish phase relationships in the CaO-MgO-CO 2 system from the concentration of 0 to 15 mol.% of MgCO 3 . Later on, calcite-dolomite thermometry has been widely used (e.g., Wada and Suzuki, 1983; Bowman and Essene, 1982;Iii et al., 1982;Nesbitt and Essene, 1982;Ralph and Diane, 1980;Rice, 1977;Suzuki, 1977;Puhan, 1976;Hatcher et al., 1973; Hutcheon and Moore, 1973;Sobol, 1973). Talantsev (1978Talantsev ( , 1976, Bickle and Powell (1977), and Barron (1974) evaluated the effect of FeCO 3 on calcitedolomite thermometry and reported that its effect is negligible at concentrations <1 mol.%. Bickle and Powell (1977) reported that the metamorphic temperature of coexisting calcitedolomite samples from the Glockner area of the Tauern Window, Austria ranged from 410 to 490 o C. The solvus temperature determined from XRD data for Grenville calcite ranged from 415 to 485 o C (Sheppard, 1966). Höy (1970) estimated a temperature of 600 o C by using the calcite from brucite marble.

show abstract

Section: Characterization Methodsmentioning

confidence: 99%

Metamorphic temperature investigation of coexisting calcite and dolomite marble––examples from Nikani Ghar marble and Nowshera Formation, Peshawar Basin, Pakistan

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Specifically, the Powell et al (1984) calibration of the geothermometer in the CaCO3-MgCO3-FeCO 3 system at temperatures between 300 and 450~ usually yielded results consistent with independent temperature estimates (see Mumin and Fleet, 1995). Calcites from the AA marbles have negligible MnO and FeO contents (up to 0.11 and 0.70 wti%, respectively (Table 2), low enough to allow the application of the calcitedolomite geothermometry.…”

Section: Carbonate Composition and Geothermometrymentioning

confidence: 82%

“…The calcite-dolomite geothermometer, based on the Mg content of calcite in equilibrium with dolomite, has been widely employed for temperature estimates in metamorphosed carbonate rocks (Essene, 1983;Powell et al, 1984;Pan and Fleet, 1992;Mumin and Fleet, 1995). Specifically, the Powell et al (1984) calibration of the geothermometer in the CaCO3-MgCO3-FeCO 3 system at temperatures between 300 and 450~ usually yielded results consistent with independent temperature estimates (see Mumin and Fleet, 1995).…”

Section: Carbonate Composition and Geothermometrymentioning

confidence: 99%

Fluid Circulation in the Apuane Alps Core Complex: Evidence from Extension Veins in the Carrara Marble

Costagliola¹

1999

Mineralogical Magazine

View full text Add to dashboard Cite

In the Apuane Alps (AA) metamorphic core complex, syn-metamorphic mineral deposits are mainly restricted to extensional shear zones in the Lower Plate Palaeozoic basement. By contrast, the extension structures at upper levels, such as the detachment fault, that are typically the seat of fluid circulation and mineralization in other core complexes, are barren in the AA. Extension veins hosted by the Jurassic Carrara marbles are among the few examples of (minor) mineralization located in the upper levels of the AA core complex. Calcite-dolomite geothermometry and fluid inclusion data suggest that the mineralizing process in these veins began raider pressure (P)-temperature (T) conditions close to the metamorphic peak (about 400~ 3 kbar). Progressive cooling and mixing between metamorphic and late stage meteoric fluids were probably responsible for most of the mineral deposition. Batches of relatively saline fluids presumably resulted from interaction with evaporitic levels located along the detachment fault. In agreement with previous estimates, fluid inclusion constraints on the P-T synmetamorphic path of the AA suggest a relatively rapid cooling of the core complex as a result of uplift. However, the maximum estimated geothermal gradient (about 35~ is considerably lower than in other core complexes, where large-scale hydrothermal circulation was associated with extension and uplift. Hence, in the AA, fluid circulation at shallow levels and mixing among fluids of different origin were not favoured, thus precluding the formation of mineral deposits along major extensional structures.

show abstract

“…Ce géothermomètre est basé sur la solubilité du magnésium dans la calcite en équilibre avec la dolomite en fonction de la température (Powell et al, 1984). L'effet au fer et du magnésium sur les températures estimées a toujours posé un problème.…”

Section: Géothermométrie Des Paires Calcite-doiomite Et Cateite-ankériteunclassified

analyse des inclusions fluides et magmatiques des dépôts aurifères dans la région du Lac Shortt, Abitibi, Québec :

See¹

1994

View full text Add to dashboard Cite

Calcite–dolomite geothermometry in the system CaCO₃–MgCO₃–FeCO₃: an experimental study

Cited by 86 publications

References 3 publications

Metamorphic temperature investigation of coexisting calcite and dolomite marble––examples from Nikani Ghar marble and Nowshera Formation, Peshawar Basin, Pakistan

Metamorphic temperature investigation of coexisting calcite and dolomite marble––examples from Nikani Ghar marble and Nowshera Formation, Peshawar Basin, Pakistan

Fluid Circulation in the Apuane Alps Core Complex: Evidence from Extension Veins in the Carrara Marble

analyse des inclusions fluides et magmatiques des dépôts aurifères dans la région du Lac Shortt, Abitibi, Québec :

Contact Info

Product

Resources

About