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A zircon U-Pb study of metaluminous (I-type) granites of the Lachlan Fold Belt, southeastern Australia: implications for the high/low temperature classification and magma differentiation processes

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A zircon U-Pb study of metaluminous (I-type) granites of the Lachlan Fold Belt, southeastern Australia: implications for the high/low temperature classification and magma differentiation processes. / Kemp, A I S ; Whitehouse, M J ; Hawkesworth, Chris; Alarcon, M K .

In: Contributions to Mineralogy and Petrology, Vol. 150, No. 2, 09.2005, p. 230-249.

Research output: Contribution to journalArticle

Harvard

Kemp, AIS, Whitehouse, MJ, Hawkesworth, C & Alarcon, MK 2005, 'A zircon U-Pb study of metaluminous (I-type) granites of the Lachlan Fold Belt, southeastern Australia: implications for the high/low temperature classification and magma differentiation processes', Contributions to Mineralogy and Petrology, vol. 150, no. 2, pp. 230-249. https://doi.org/10.1007/s00410-005-0019-6

APA

Kemp, A. I. S., Whitehouse, M. J., Hawkesworth, C., & Alarcon, M. K. (2005). A zircon U-Pb study of metaluminous (I-type) granites of the Lachlan Fold Belt, southeastern Australia: implications for the high/low temperature classification and magma differentiation processes. Contributions to Mineralogy and Petrology, 150(2), 230-249. https://doi.org/10.1007/s00410-005-0019-6

Vancouver

Kemp AIS, Whitehouse MJ, Hawkesworth C, Alarcon MK. A zircon U-Pb study of metaluminous (I-type) granites of the Lachlan Fold Belt, southeastern Australia: implications for the high/low temperature classification and magma differentiation processes. Contributions to Mineralogy and Petrology. 2005 Sep;150(2):230-249. https://doi.org/10.1007/s00410-005-0019-6

Author

Kemp, A I S ; Whitehouse, M J ; Hawkesworth, Chris ; Alarcon, M K . / A zircon U-Pb study of metaluminous (I-type) granites of the Lachlan Fold Belt, southeastern Australia: implications for the high/low temperature classification and magma differentiation processes. In: Contributions to Mineralogy and Petrology. 2005 ; Vol. 150, No. 2. pp. 230-249.

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@article{16fae40c3e054ed98378bf321f8da90c,
title = "A zircon U-Pb study of metaluminous (I-type) granites of the Lachlan Fold Belt, southeastern Australia: implications for the high/low temperature classification and magma differentiation processes",
abstract = "Following seminal studies in the Lachlan Fold Belt (southeastern Australia), it has become almost axiomatic that metaluminous granites derive from infracrustal precursors, whereas strongly peraluminous plutons have metasedimentary or supracrustal sources, as reflected in the I- and S-type designation. Recently, zircon saturation thermometry has been used to further subdivide I-type granites into high- and low-temperature categories. That low-temperature I-type granites evolved by restite separation from magmas generated in the zircon stability field is implicit in this classification. To explore this hypothesis, we report an ion microprobe U-Pb (zircon) study into three hallmark 'low-temperature' Lachlan Fold Belt I-type suites. The combined patterns of zircon age inheritance and bulk rock Zr trends suggest that each suite formed from magmas that were initially zircon-undersaturated, and that fractional crystallisation, not restite unmixing, was the dominant differentiation process. The low temperature status presently applied to these rocks cannot therefore be justified. The inherited zircons in these I-type granites reflect melting and assimilation of metasedimentary rock, and testify to a supracrustal source component.",
keywords = "ISOTOPIC MIXING MODEL, CRUSTAL ARCHITECTURE, PETROGENETIC MODELS, MAFIC INCLUSIONS, TECTONIC MODELS, ION-MICROPROBE, S-TYPE, CONVECTIVE FRACTIONATION, GEOCHEMICAL CONSEQUENCES, MICROGRANITOID ENCLAVES",
author = "Kemp, {A I S} and Whitehouse, {M J} and Chris Hawkesworth and Alarcon, {M K}",
year = "2005",
month = "9",
doi = "10.1007/s00410-005-0019-6",
language = "English",
volume = "150",
pages = "230--249",
journal = "Contributions to Mineralogy and Petrology",
issn = "0010-7999",
publisher = "Springer-Verlag",
number = "2",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - A zircon U-Pb study of metaluminous (I-type) granites of the Lachlan Fold Belt, southeastern Australia: implications for the high/low temperature classification and magma differentiation processes

AU - Kemp, A I S

AU - Whitehouse, M J

AU - Hawkesworth, Chris

AU - Alarcon, M K

PY - 2005/9

Y1 - 2005/9

N2 - Following seminal studies in the Lachlan Fold Belt (southeastern Australia), it has become almost axiomatic that metaluminous granites derive from infracrustal precursors, whereas strongly peraluminous plutons have metasedimentary or supracrustal sources, as reflected in the I- and S-type designation. Recently, zircon saturation thermometry has been used to further subdivide I-type granites into high- and low-temperature categories. That low-temperature I-type granites evolved by restite separation from magmas generated in the zircon stability field is implicit in this classification. To explore this hypothesis, we report an ion microprobe U-Pb (zircon) study into three hallmark 'low-temperature' Lachlan Fold Belt I-type suites. The combined patterns of zircon age inheritance and bulk rock Zr trends suggest that each suite formed from magmas that were initially zircon-undersaturated, and that fractional crystallisation, not restite unmixing, was the dominant differentiation process. The low temperature status presently applied to these rocks cannot therefore be justified. The inherited zircons in these I-type granites reflect melting and assimilation of metasedimentary rock, and testify to a supracrustal source component.

AB - Following seminal studies in the Lachlan Fold Belt (southeastern Australia), it has become almost axiomatic that metaluminous granites derive from infracrustal precursors, whereas strongly peraluminous plutons have metasedimentary or supracrustal sources, as reflected in the I- and S-type designation. Recently, zircon saturation thermometry has been used to further subdivide I-type granites into high- and low-temperature categories. That low-temperature I-type granites evolved by restite separation from magmas generated in the zircon stability field is implicit in this classification. To explore this hypothesis, we report an ion microprobe U-Pb (zircon) study into three hallmark 'low-temperature' Lachlan Fold Belt I-type suites. The combined patterns of zircon age inheritance and bulk rock Zr trends suggest that each suite formed from magmas that were initially zircon-undersaturated, and that fractional crystallisation, not restite unmixing, was the dominant differentiation process. The low temperature status presently applied to these rocks cannot therefore be justified. The inherited zircons in these I-type granites reflect melting and assimilation of metasedimentary rock, and testify to a supracrustal source component.

KW - ISOTOPIC MIXING MODEL

KW - CRUSTAL ARCHITECTURE

KW - PETROGENETIC MODELS

KW - MAFIC INCLUSIONS

KW - TECTONIC MODELS

KW - ION-MICROPROBE

KW - S-TYPE

KW - CONVECTIVE FRACTIONATION

KW - GEOCHEMICAL CONSEQUENCES

KW - MICROGRANITOID ENCLAVES

UR - http://www.scopus.com/inward/record.url?scp=27244443377&partnerID=8YFLogxK

U2 - 10.1007/s00410-005-0019-6

DO - 10.1007/s00410-005-0019-6

M3 - Article

VL - 150

SP - 230

EP - 249

JO - Contributions to Mineralogy and Petrology

JF - Contributions to Mineralogy and Petrology

SN - 0010-7999

IS - 2

ER -

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