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Journal of Metamorphic Geology Volume 13 Issue 2

Subject Areas: Geochemistry and Petrology;
Publisher: Wiley Subscription Services, Inc., A Wiley Company - Wiley
ISSN: 0263-4929
SJR: 118

LitStream

Journal Article

High‐pressure micro‐inclusions and development of an inverted metamorphic gradient in the Santiago Schists (Ordenes Complex, NW Iberian Massif, Spain): evidence of subduction and syncollisional decompression

ARENAS, R.; PASCUAL, F. J. RUBIO; GARCIA, F. DIAZ; CATALAN, J. R. MARTINEZ

1995 Journal of Metamorphic Geology

doi:10.1111/j.1525-1314.1995.tb00211.x

Abstract The Santiago Schists are located in the Basal Unit of the Ordenes Complex, one of the allochthonous complexes outcropping in the inner part of the Hercynian Belt in the north‐west of the Iberian Peninsula. Their tectonothermal evolution is characterized by the development of an...
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Journal Article

Stepping stones and pitfalls in the determination of an anticlockwise P‐T‐t ‐deformation path: the low‐ P , high‐ T Cooma Complex, Australia

JOHNSON, S. E.; VERNON, R. H.

1995 Journal of Metamorphic Geology

doi:10.1111/j.1525-1314.1995.tb00212.x

Abstract Low‐pressure/high‐temperature (low‐P/high‐T) metamorphic rocks of the Cooma Complex, southeastern Australia, show evidence of an anticlockwise pressure‐temperature‐time‐deformation (P‐T‐t‐D) path, similar to those of some other low‐P/high‐T metamorphic areas of Australia. Prograde paths...
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Journal Article

North‐west propagation of the Grenville orogen: Grenvillian structure and metamorphism near Key Harbour, Georgian Bay, Ontario, Canada *

JAMIESON, R. A.; CULSHAW, N. G.; CORRIGAN, D.

1995 Journal of Metamorphic Geology

doi:10.1111/j.1525-1314.1995.tb00213.x

Abstract We report structural and metamorphic data from a c. 25‐km transect across the eastern Grenville Front Tectonic Zone (GFTZ) to the Britt domain at the northern end of Georgian Bay near Key Harbour, Ontario. Constrasting Grenvillian structural and fabric elements characterize the eastern...
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Journal Article

40 Ar/ 39 Ar traverse — Grenville Front Tectonic Zone to Britt Domain, Grenville Province, Ontario, Canada *

REYNOLDS, P. H.; CULSHAW, N. G.; JAMIESON, R. A.; GRANT, S. L.; McKENZIE, K. J.

1995 Journal of Metamorphic Geology

doi:10.1111/j.1525-1314.1995.tb00214.x

Abstract 40Ar/39Ar data (on hornblende, muscovite and K‐feldspar) are presented for samples from the western Grenville Province taken along a 140‐km traverse from the Grenville Front into the Britt domain. Our interpretation is based on 28 new analyses, synthesized with 20 previously reported...
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Journal Article

The role of mylonites in the uplift of an oblique lower crustal section, East Antarctica

NICHOLS, G. T.

1995 Journal of Metamorphic Geology

doi:10.1111/j.1525-1314.1995.tb00215.x

Abstract Three generations of mylonites discovered in the northern Prince Charles Mountains (nPCM) are associated with episodes of crustal thickening and thinning. First‐generation mylonites (MY1) are shallow thrusts which pre‐date both folding and peak metamorphic conditions, and formed during...
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Journal Article

Syndeformational fluid trapping in quartz: determining the pressure‐temperature conditions of deformation from fluid inclusions and the formation of pure CO 2 fluid inclusions during grain‐boundary migration

JOHNSON, E. L.; HOLLISTER, L. S.

1995 Journal of Metamorphic Geology

doi:10.1111/j.1525-1314.1995.tb00216.x

Abstract Observations and microthermometric data on fluid inclusions from a terrane that underwent deformation following peak metamorphic conditions show that grain‐boundary migration recrystallization favours the entrapment of carbonic inclusions whereas microfracturing during brittle...
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Journal Article

40 Ar/ 39 Ar geochronology and P‐T‐t paths from the Cordillera Darwin metamorphic complex, Tierra del Fuego, Chile

KOHN, M. J.; SPEAR, F. S.; HARRISON, T. M.; DALZIEL, I. W. D.

1995 Journal of Metamorphic Geology

doi:10.1111/j.1525-1314.1995.tb00217.x

Abstract 40Ar/39Ar data collected from hornblende, muscovite, biotite and K‐feldspar constrain the P‐T‐t history of the Cordillera Darwin metamorphic complex, Tierra del Fuego, Chile. These data show two periods of rapid cooling, the first between c. 500 and c. 325° C at rates ≥25° C Ma‐1, and...
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Journal Article

Mesozoic tectonothermal development of the Sambagawa, Mikabu and Chichibu belts, south‐west Japan: evidence from 40 Ar/ 39 Ar whole‐rock phyllite ages

DALLMEYER, R. D.; TAKASU, A.; YAMAGUCHI, K.

1995 Journal of Metamorphic Geology

doi:10.1111/j.1525-1314.1995.tb00218.x

Abstract Five whole‐rock 40Ar/39Ar plateau ages from low‐grade sectors of the Sambagawa belt (Besshi nappe complex) range between 87 and 97 Ma. Two whole‐rock phyllite samples from the Mikabu greenstone belt record well‐defined 40Ar/39Ar plateau ages of 96 and 98 Ma. Together these ages suggest...
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Journal Article

A multi‐stage pressure—temperature record in the Chilka Lake granulites: the epitome of the metamorphic evolution of Eastern Ghats, India?

SEN, S. K.; BHATTACHARYA, S.; ACHARYYA, A.

1995 Journal of Metamorphic Geology

doi:10.1111/j.1525-1314.1995.tb00219.x

Abstract Metapelitic and charnockitic granulites exposed around Chilka Lake in the northern sector of the Eastern Ghats, India, preserve a multi‐stage P—T record. A high‐T decompression from above 10 kbar to 8 kbar around 1100°C has been determined from Mg‐rich metapelites (XMg>0.60) with...
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Journal Article

Deep crustal growth of quartz, kyanite and garnet into large‐aperture, fluid‐filled fractures, north‐eastern Connecticut, USA

AGUE, J. J.

1995 Journal of Metamorphic Geology

doi:10.1111/j.1525-1314.1995.tb00220.x

Abstract A petrographic and petrological analysis of exceptionally well‐preserved hydrothermal veins from the Merrimack synclinorium, north‐eastern Connecticut, has been carried out in order to place new field‐based constraints on fracture aperture dimensions and porosity in the lower continental...

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