Whole-rock/mineral O-isotope fractionations as a tool to model fluid- rock interaction in deep seated shear zones of the Southern Marginal Zone of the Limpopo Belt, South Africa

S. Hoernes; U. Lichtenstein; D. D. Van Reenen; K. Mokgatlha

Whole-rock/mineral O-isotope fractionations as a tool to model fluid- rock interaction in deep seated shear zones of the Southern Marginal Zone of the Limpopo Belt, South Africa

S. Hoernes, U. Lichtenstein, D. D. Van Reenen, K. Mokgatlha

Mineralogisch-Petrologisches Institut

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

22 Citations (Scopus)

Abstract

The concept of whole-rock/mineral fractionations is introduced and applied to rocks of the Southern Marginal Zone (SMZ) of the Limpopo Belt. Based on rarely preserved mineral equilibria, on whole-rock/garnet fractionations in cases where cooling occurred under closed system conditions, and on quartz-garnet fractionations obtained from micro-sampling and LASER fluorination, peak-temperatures of granulite-facies metamorphism in the Limpopo Belt are in the range of 800 to 870°C. Also in concordance with petrological modelling are the conditions of retrograde formation of orthoamphibole. Fluid influx occurred during uplift at significantly lower, but variable temperatures. Anthophyllite crystallized at temperatures around 600°C. -from Authors

Original language	English
Pages (from-to)	488-497
Number of pages	10
Journal	South African Journal of Geology
Volume	98
Issue number	4
Publication status	Published - 1995
Externally published	Yes

ASJC Scopus subject areas

Geology

Cite this

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title = "Whole-rock/mineral O-isotope fractionations as a tool to model fluid- rock interaction in deep seated shear zones of the Southern Marginal Zone of the Limpopo Belt, South Africa",

abstract = "The concept of whole-rock/mineral fractionations is introduced and applied to rocks of the Southern Marginal Zone (SMZ) of the Limpopo Belt. Based on rarely preserved mineral equilibria, on whole-rock/garnet fractionations in cases where cooling occurred under closed system conditions, and on quartz-garnet fractionations obtained from micro-sampling and LASER fluorination, peak-temperatures of granulite-facies metamorphism in the Limpopo Belt are in the range of 800 to 870°C. Also in concordance with petrological modelling are the conditions of retrograde formation of orthoamphibole. Fluid influx occurred during uplift at significantly lower, but variable temperatures. Anthophyllite crystallized at temperatures around 600°C. -from Authors",

author = "S. Hoernes and U. Lichtenstein and {Van Reenen}, {D. D.} and K. Mokgatlha",

year = "1995",

language = "English",

volume = "98",

pages = "488--497",

journal = "South African Journal of Geology",

issn = "1012-0750",

publisher = "Geological Society of South Africa",

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}

Whole-rock/mineral O-isotope fractionations as a tool to model fluid- rock interaction in deep seated shear zones of the Southern Marginal Zone of the Limpopo Belt, South Africa. / Hoernes, S.; Lichtenstein, U.; Van Reenen, D. D. et al.
In: South African Journal of Geology, Vol. 98, No. 4, 1995, p. 488-497.

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

TY - JOUR

T1 - Whole-rock/mineral O-isotope fractionations as a tool to model fluid- rock interaction in deep seated shear zones of the Southern Marginal Zone of the Limpopo Belt, South Africa

AU - Hoernes, S.

AU - Lichtenstein, U.

AU - Van Reenen, D. D.

AU - Mokgatlha, K.

PY - 1995

Y1 - 1995

N2 - The concept of whole-rock/mineral fractionations is introduced and applied to rocks of the Southern Marginal Zone (SMZ) of the Limpopo Belt. Based on rarely preserved mineral equilibria, on whole-rock/garnet fractionations in cases where cooling occurred under closed system conditions, and on quartz-garnet fractionations obtained from micro-sampling and LASER fluorination, peak-temperatures of granulite-facies metamorphism in the Limpopo Belt are in the range of 800 to 870°C. Also in concordance with petrological modelling are the conditions of retrograde formation of orthoamphibole. Fluid influx occurred during uplift at significantly lower, but variable temperatures. Anthophyllite crystallized at temperatures around 600°C. -from Authors

AB - The concept of whole-rock/mineral fractionations is introduced and applied to rocks of the Southern Marginal Zone (SMZ) of the Limpopo Belt. Based on rarely preserved mineral equilibria, on whole-rock/garnet fractionations in cases where cooling occurred under closed system conditions, and on quartz-garnet fractionations obtained from micro-sampling and LASER fluorination, peak-temperatures of granulite-facies metamorphism in the Limpopo Belt are in the range of 800 to 870°C. Also in concordance with petrological modelling are the conditions of retrograde formation of orthoamphibole. Fluid influx occurred during uplift at significantly lower, but variable temperatures. Anthophyllite crystallized at temperatures around 600°C. -from Authors

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M3 - Article

AN - SCOPUS:0029476883

SN - 1012-0750

VL - 98

SP - 488

EP - 497

JO - South African Journal of Geology

JF - South African Journal of Geology

IS - 4

ER -

Whole-rock/mineral O-isotope fractionations as a tool to model fluid- rock interaction in deep seated shear zones of the Southern Marginal Zone of the Limpopo Belt, South Africa

Abstract

ASJC Scopus subject areas

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