Two new geobarometers for garnet amphibolites, with applications to southeastern Vermont

M. J. Kohn; F. S. Spear

Two new geobarometers for garnet amphibolites, with applications to southeastern Vermont

M. J. Kohn
, F. S. Spear

Geosciences Department

Rensselaer Polytechnic Institute

Research output: Contribution to journal › Article › peer-review

523 Scopus citations

Abstract

Two new geobarometers for the assemblage garnet + hornblende + plagioclase + quartz have been calibrated on the basis of the equilibrium 6 anorthite + 3 tremolite = 2 grossular + 1 pyrope + 3 tschermakite + 6 quartz and its Fe end-member equivalent. Data representing 37 natural samples that equilibrated at conditions of 2.5 to 13 kbar and 500 to 800°C were fitted to the general equation -RT ln K_eq = A-BT+(P-1)C by using a weighted least-squares method. Application of the calibrations to samples from southeastern Vermont near the Strafford Chester, and Athens domes documents relatively high pressure metamorphism (7 to 10 kbar) for these structures. -from Authors

Original language	English
Pages (from-to)	89-96
Number of pages	8
Journal	American Mineralogist
Volume	75
Issue number	1-2
State	Published - 1990

Cite this

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title = "Two new geobarometers for garnet amphibolites, with applications to southeastern Vermont",

abstract = "Two new geobarometers for the assemblage garnet + hornblende + plagioclase + quartz have been calibrated on the basis of the equilibrium 6 anorthite + 3 tremolite = 2 grossular + 1 pyrope + 3 tschermakite + 6 quartz and its Fe end-member equivalent. Data representing 37 natural samples that equilibrated at conditions of 2.5 to 13 kbar and 500 to 800°C were fitted to the general equation -RT ln Keq = A-BT+(P-1)C by using a weighted least-squares method. Application of the calibrations to samples from southeastern Vermont near the Strafford Chester, and Athens domes documents relatively high pressure metamorphism (7 to 10 kbar) for these structures. -from Authors",

author = "Kohn, \{M. J.\} and Spear, \{F. S.\}",

year = "1990",

language = "English",

volume = "75",

pages = "89--96",

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TY - JOUR

T1 - Two new geobarometers for garnet amphibolites, with applications to southeastern Vermont

AU - Kohn, M. J.

AU - Spear, F. S.

PY - 1990

Y1 - 1990

N2 - Two new geobarometers for the assemblage garnet + hornblende + plagioclase + quartz have been calibrated on the basis of the equilibrium 6 anorthite + 3 tremolite = 2 grossular + 1 pyrope + 3 tschermakite + 6 quartz and its Fe end-member equivalent. Data representing 37 natural samples that equilibrated at conditions of 2.5 to 13 kbar and 500 to 800°C were fitted to the general equation -RT ln Keq = A-BT+(P-1)C by using a weighted least-squares method. Application of the calibrations to samples from southeastern Vermont near the Strafford Chester, and Athens domes documents relatively high pressure metamorphism (7 to 10 kbar) for these structures. -from Authors

AB - Two new geobarometers for the assemblage garnet + hornblende + plagioclase + quartz have been calibrated on the basis of the equilibrium 6 anorthite + 3 tremolite = 2 grossular + 1 pyrope + 3 tschermakite + 6 quartz and its Fe end-member equivalent. Data representing 37 natural samples that equilibrated at conditions of 2.5 to 13 kbar and 500 to 800°C were fitted to the general equation -RT ln Keq = A-BT+(P-1)C by using a weighted least-squares method. Application of the calibrations to samples from southeastern Vermont near the Strafford Chester, and Athens domes documents relatively high pressure metamorphism (7 to 10 kbar) for these structures. -from Authors

UR - https://www.scopus.com/pages/publications/0025205495

M3 - Article

AN - SCOPUS:0025205495

SN - 0003-004X

VL - 75

SP - 89

EP - 96

JO - American Mineralogist

JF - American Mineralogist

IS - 1-2

ER -

Two new geobarometers for garnet amphibolites, with applications to southeastern Vermont

Abstract

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