Alteration and breakdown of xenotime-(Y) and monazite-(Ce) in granitic rocks of the Western Carpathians, Slovakia

Igor Broska, C. Terry Williams, Marian Janák, G. Nagy

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

In the granitic rocks of the Western Carpathians, xenotime-(Y) occurs both as a late-stage magmatic mineral, and as a secondary post-magmatic phase. Magmatic xenotime occurs with monazite and displays minor compositional zonation involving Si, Th and U. The source of elements for the formation of secondary xenotime-(Y) in the granitic rocks results from leaching of P and (Y+REE), mainly from zircon and apatite. Both xenotime-(Y) and monazite-(Ce) are unstable during fluid-activated overprinting. Low temperature alteration of monazite in S-type granites leads to the formation of apatite enriched in the britholite component, but low to medium grades of metamorphism result in the formation of apatite and LREE enriched epidote (partly allanite) as a corona enclosing the monazite-(Ce) core. Xenotime-(Y) shows a similar alteration pattern, but with different REE distributions within the products. At greenschist/amphibolite facies, rims of secondary Y-rich apatite and Y-rich epidote form around xenotime-(Y). In low-Ca granites however, apatite is missing from this alteration assemblage as xenotime-(Y) breaks down directly to Y-enriched epidote. The relative mobilities of the heavy and light REE are different during breakdown of monazite and xenotime. The fluid responsible for the breakdown of monazite and xenotime contains elements released from alteration of anorthite (Ca) and biotite (Si, Al and F).

Original languageEnglish
Pages (from-to)71-83
Number of pages13
JournalLithos
Volume82
Issue number1-2 SPEC. ISS.
DOIs
Publication statusPublished - May 2005

Fingerprint

xenotime
monazite
Apatites
Rocks
apatite
rock
epidote
rare earth element
Fluids
britholite
Leaching
Minerals
allanite
fluid
anorthite
overprinting
greenschist
amphibolite facies
zonation
corona

Keywords

  • Granites
  • Monazite-(Ce)
  • Western Carpathians
  • Xenotime-(Y)
  • Y-rich epidote

ASJC Scopus subject areas

  • Geochemistry and Petrology

Cite this

Alteration and breakdown of xenotime-(Y) and monazite-(Ce) in granitic rocks of the Western Carpathians, Slovakia. / Broska, Igor; Williams, C. Terry; Janák, Marian; Nagy, G.

In: Lithos, Vol. 82, No. 1-2 SPEC. ISS., 05.2005, p. 71-83.

Research output: Contribution to journalArticle

Broska, Igor ; Williams, C. Terry ; Janák, Marian ; Nagy, G. / Alteration and breakdown of xenotime-(Y) and monazite-(Ce) in granitic rocks of the Western Carpathians, Slovakia. In: Lithos. 2005 ; Vol. 82, No. 1-2 SPEC. ISS. pp. 71-83.
@article{7df939a66bdf4c5da56dfe7977a22a74,
title = "Alteration and breakdown of xenotime-(Y) and monazite-(Ce) in granitic rocks of the Western Carpathians, Slovakia",
abstract = "In the granitic rocks of the Western Carpathians, xenotime-(Y) occurs both as a late-stage magmatic mineral, and as a secondary post-magmatic phase. Magmatic xenotime occurs with monazite and displays minor compositional zonation involving Si, Th and U. The source of elements for the formation of secondary xenotime-(Y) in the granitic rocks results from leaching of P and (Y+REE), mainly from zircon and apatite. Both xenotime-(Y) and monazite-(Ce) are unstable during fluid-activated overprinting. Low temperature alteration of monazite in S-type granites leads to the formation of apatite enriched in the britholite component, but low to medium grades of metamorphism result in the formation of apatite and LREE enriched epidote (partly allanite) as a corona enclosing the monazite-(Ce) core. Xenotime-(Y) shows a similar alteration pattern, but with different REE distributions within the products. At greenschist/amphibolite facies, rims of secondary Y-rich apatite and Y-rich epidote form around xenotime-(Y). In low-Ca granites however, apatite is missing from this alteration assemblage as xenotime-(Y) breaks down directly to Y-enriched epidote. The relative mobilities of the heavy and light REE are different during breakdown of monazite and xenotime. The fluid responsible for the breakdown of monazite and xenotime contains elements released from alteration of anorthite (Ca) and biotite (Si, Al and F).",
keywords = "Granites, Monazite-(Ce), Western Carpathians, Xenotime-(Y), Y-rich epidote",
author = "Igor Broska and Williams, {C. Terry} and Marian Jan{\'a}k and G. Nagy",
year = "2005",
month = "5",
doi = "10.1016/j.lithos.2004.12.007",
language = "English",
volume = "82",
pages = "71--83",
journal = "Lithos",
issn = "0024-4937",
publisher = "Elsevier",
number = "1-2 SPEC. ISS.",

}

TY - JOUR

T1 - Alteration and breakdown of xenotime-(Y) and monazite-(Ce) in granitic rocks of the Western Carpathians, Slovakia

AU - Broska, Igor

AU - Williams, C. Terry

AU - Janák, Marian

AU - Nagy, G.

PY - 2005/5

Y1 - 2005/5

N2 - In the granitic rocks of the Western Carpathians, xenotime-(Y) occurs both as a late-stage magmatic mineral, and as a secondary post-magmatic phase. Magmatic xenotime occurs with monazite and displays minor compositional zonation involving Si, Th and U. The source of elements for the formation of secondary xenotime-(Y) in the granitic rocks results from leaching of P and (Y+REE), mainly from zircon and apatite. Both xenotime-(Y) and monazite-(Ce) are unstable during fluid-activated overprinting. Low temperature alteration of monazite in S-type granites leads to the formation of apatite enriched in the britholite component, but low to medium grades of metamorphism result in the formation of apatite and LREE enriched epidote (partly allanite) as a corona enclosing the monazite-(Ce) core. Xenotime-(Y) shows a similar alteration pattern, but with different REE distributions within the products. At greenschist/amphibolite facies, rims of secondary Y-rich apatite and Y-rich epidote form around xenotime-(Y). In low-Ca granites however, apatite is missing from this alteration assemblage as xenotime-(Y) breaks down directly to Y-enriched epidote. The relative mobilities of the heavy and light REE are different during breakdown of monazite and xenotime. The fluid responsible for the breakdown of monazite and xenotime contains elements released from alteration of anorthite (Ca) and biotite (Si, Al and F).

AB - In the granitic rocks of the Western Carpathians, xenotime-(Y) occurs both as a late-stage magmatic mineral, and as a secondary post-magmatic phase. Magmatic xenotime occurs with monazite and displays minor compositional zonation involving Si, Th and U. The source of elements for the formation of secondary xenotime-(Y) in the granitic rocks results from leaching of P and (Y+REE), mainly from zircon and apatite. Both xenotime-(Y) and monazite-(Ce) are unstable during fluid-activated overprinting. Low temperature alteration of monazite in S-type granites leads to the formation of apatite enriched in the britholite component, but low to medium grades of metamorphism result in the formation of apatite and LREE enriched epidote (partly allanite) as a corona enclosing the monazite-(Ce) core. Xenotime-(Y) shows a similar alteration pattern, but with different REE distributions within the products. At greenschist/amphibolite facies, rims of secondary Y-rich apatite and Y-rich epidote form around xenotime-(Y). In low-Ca granites however, apatite is missing from this alteration assemblage as xenotime-(Y) breaks down directly to Y-enriched epidote. The relative mobilities of the heavy and light REE are different during breakdown of monazite and xenotime. The fluid responsible for the breakdown of monazite and xenotime contains elements released from alteration of anorthite (Ca) and biotite (Si, Al and F).

KW - Granites

KW - Monazite-(Ce)

KW - Western Carpathians

KW - Xenotime-(Y)

KW - Y-rich epidote

UR - http://www.scopus.com/inward/record.url?scp=18244380318&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=18244380318&partnerID=8YFLogxK

U2 - 10.1016/j.lithos.2004.12.007

DO - 10.1016/j.lithos.2004.12.007

M3 - Article

VL - 82

SP - 71

EP - 83

JO - Lithos

JF - Lithos

SN - 0024-4937

IS - 1-2 SPEC. ISS.

ER -