Details
| Translated title of the contribution | ( Geochronological indications of accessory minerals, monazite and zircon, on Hercynian migmatization in Iberian Peninsula. Migmatites and Tourem orthogneiss, northern Portugal). |
|---|---|
| Original language | French |
| Pages (from-to) | 713-717 |
| Number of pages | 5 |
| Journal | Comptes Rendus - Academie des Sciences, Serie II |
| Volume | 304 |
| Issue number | 13 |
| Publication status | Published - 1987 |
| Externally published | Yes |
Abstract
U/Pb data on monazite from anatectic granites indicate an age of migmatisation at 303 Ma in the Tourem complex. This concordant age implies isotopic rehomogenisation of monazites during migmatisation. The discordia obtained on zircons of xenoliths of aluminous orthogneiss presents a lower intercept at 399+ or -13 Ma and an upper intercept at 1902+ or -160 Ma. The age of 39 Ma could correspond to the age of formation of a peraluminous granite or could be interpreted in terms of multiple episodic lead loss and would not have in that case any geochronological significance. The lower intercept shows the existence of a recycled Lower-Paleozoic crust.-from English summary
ASJC Scopus subject areas
- Environmental Science(all)
- General Environmental Science
- Engineering(all)
- General Engineering
- Earth and Planetary Sciences(all)
- General Earth and Planetary Sciences
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In: Comptes Rendus - Academie des Sciences, Serie II, Vol. 304, No. 13, 1987, p. 713-717.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Indications geochronologiques des mineraux accessoires, monazites et zircons, sur la migmatisation hercynienne de la Peninsule iberique. Migmatites et orthogneiss de Tourem (Nord Portugal).
AU - Holtz, Francois
AU - Juteau, M.
N1 - Copyright: Copyright 2018 Elsevier B.V., All rights reserved.
PY - 1987
Y1 - 1987
N2 - U/Pb data on monazite from anatectic granites indicate an age of migmatisation at 303 Ma in the Tourem complex. This concordant age implies isotopic rehomogenisation of monazites during migmatisation. The discordia obtained on zircons of xenoliths of aluminous orthogneiss presents a lower intercept at 399+ or -13 Ma and an upper intercept at 1902+ or -160 Ma. The age of 39 Ma could correspond to the age of formation of a peraluminous granite or could be interpreted in terms of multiple episodic lead loss and would not have in that case any geochronological significance. The lower intercept shows the existence of a recycled Lower-Paleozoic crust.-from English summary
AB - U/Pb data on monazite from anatectic granites indicate an age of migmatisation at 303 Ma in the Tourem complex. This concordant age implies isotopic rehomogenisation of monazites during migmatisation. The discordia obtained on zircons of xenoliths of aluminous orthogneiss presents a lower intercept at 399+ or -13 Ma and an upper intercept at 1902+ or -160 Ma. The age of 39 Ma could correspond to the age of formation of a peraluminous granite or could be interpreted in terms of multiple episodic lead loss and would not have in that case any geochronological significance. The lower intercept shows the existence of a recycled Lower-Paleozoic crust.-from English summary
UR - http://www.scopus.com/inward/record.url?scp=0023507472&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0023507472
VL - 304
SP - 713
EP - 717
JO - Comptes Rendus - Academie des Sciences, Serie II
JF - Comptes Rendus - Academie des Sciences, Serie II
IS - 13
ER -