Results 171 to 180 of about 2,556 (192)

An analysis of uncertainty in non‐equilibrium and equilibrium geothermobarometry

Journal of Metamorphic Geology, 2004
AbstractIn statistically optimised P–T estimation, the contributions to overall uncertainty from different sources are represented by ellipses. One source, for a diffusion‐controlled reaction at non‐equilibrium, is diffusion modelling of the reaction texture.
J. R. ASHWORTH, V. S. SHEPLEV, V. V. KHLESTOV, V. A. ANANYEV   +3 more
openaire   +1 more source

Geothermobarometry and Barrovian Metamorphism of Darjeeling-Mangpu Region, Eastern Himalaya

2016
Along the Darjeeling–Mangpu region, polyphase deformation and barrovian metamorphism has been delineated in relation to the Main Central Thrust (MCT). The different parageneses of pelitic rocks containing chlorite, muscovite, biotite, garnet, staurolite, kyanite, sillimanite, k-feldspar and plagioclase show various texture resulting by the continuous ...
Suparna Tewari, Divya Prakash
openaire   +1 more source

Metamorphic peak geothermobarometry in the Furulund Group, Sulitjelma, Scandinavian Caledonides: implications for uplift

Journal of Metamorphic Geology, 1992
ABSTRACTRegional metamorphism in the Sulitjelma area of the arctic Scandinavian Caledonides has produced a series of Barrovian zones, from chlorite through to kyanite in more aluminous pelites, which transect the major lithological boundaries in a large nappe unit of the Köli Nappe Complex.
Boyle, A.P., Westhead, R.K.
openaire   +2 more sources

Mössbauer spectroscopy of omphacite and garnet pairs from eclogites: Application to geothermobarometry

American Mineralogist, 2005
Cation partition among coexisting minerals has been widely applied to eclogite thermometry, but an accurate estimation of Fe 3+ content compared to total Fe is crucial in obtaining reasonable temperatures for petrologic studies. Room-temperature Mossbauer spectroscopy was measured for garnet-omphacite pairs in high-pressure (HP) and ultrahigh-pressure
Zheng, YF, Fu, B, Li, YL
openaire   +3 more sources

Mineral chemistry and geothermobarometry of Moshirabad pluton, Qorveh, Kurdistan, western Iran

Island Arc, 2012
AbstractThe Moshirabad pluton is located southwest of the Sanandaj–Sirjan Metamorphic Belt, Qorveh, western Iran. The pluton is composed of diorite, monzodiorite, quartz diorite, quartz monzodiorite, tonalite, granodiorite, granite, aplite, and pegmatite.
ALI A. SEPAHI, MOHAMMAD MAANIJOU, SEDDIGHEH SALAMI, SARA GARDIDEH, TAYEBEH KHAKSAR   +4 more
openaire   +1 more source

Methods for Estimation of Uncertainties in Geothermobarometry

2012
The assignment of a realistic uncertainty in any measured and computed quantity is important in all physical sciences. The advent of large internally consistent thermodynamic data bases and the development of multi-reaction techniques for P-T estimates in metamorphic and igneous rocks have brought revolution in the field of geothermobarometry ...
openaire   +1 more source

Geothermobarometry of Al2SiO5-bearing metapelites in the western Austroalpine �tztal-basement

Mineralogy and Petrology, 1996
The dominant amphibolite-facies Variscan event in the Austroalpine Otztal basement can best be studied in the northwestern part of the Otztal block. Further to the southeast it is overprinted by Alpine metamorphism. Metapelites with the assemblage garnet-staurolite-kyanite-sillimanite±andalusite-biotite-muscovite-plagioclase were used to reconstruct ...
P. Tropper, G. Hoinkes
openaire   +1 more source

Geothermobarometry in metasediments of the southern Grossvenediger area (Tauern Window, Austria)

Journal of Metamorphic Geology, 1990
Metasediments in the southern Grossvenediger area (Tauern Window, Austria) were studied along a cross‐section through rocks of increasing metamorphic grade from the margin of the Tauern Window in the south to the base of the Upper Schieferhülle, including the Eclogite Zone, in the north.In the southern part of the cross‐section there is no evidence for
openaire   +1 more source

Garnet–clinopyroxene and clinopyroxene geothermobarometry of deep mantle and crust eclogites and peridotites

Lithos, 2008
Abstract Eclogite is one of the major types of xenoliths in kimberlite. An investigation of such xenoliths provides important constraints on the distribution of P and T within the upper mantle and its chemical composition. Garnet–clinopyroxene and clinopyroxene barometers are proposed for mantle eclogites and peridotites on the basis of CaTs ...
openaire   +1 more source

Geothermobarometry

2021
openaire   +1 more source