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Late Archaean-early Proterozoic source ages of zircons in rocks from the Paleozoic orogen of western Galicia, NW Spain

Journal Article:

Abstract

U-Pb data are reported for nine suites of zircons and three monazites from the Paleozoic orogen in western Galicia: one paragneiss and six orthogneisses from the early Paleozoic basement, and two Carboniferous (ca. 310 Ma old) intrusions of two-mica granite. New whole-rock Rb-Sr analyses, along with earlier data, indicate an age of ca. 470-440 Ma (Ordovician) for the emplacement of the granitic precursors of the orthogneisses. Monazite from the paragneiss also yields an U-Pb age of ca. 470 Ma. From the high initial /sup 87/Sr//sup 86/Sr ratios an involvement of Precambrian continental crust material is evident in the generation of the early Paleozoic suite of granites, while the zircon U-Pb data give evidence of the presence of about 3.0-2.0 Ga old (late Archaean-early Proterozoic) components in the source material. Zircons from the oldest sedimentary rocks in the area, now present as catazonal paragneisses and a likely source for the granites, likewise reveal a provenance age of 3.0-2.0 Ga.
Authors:
Kuijper, R P; Priem, H N.A.; [1]  Den Tex, E [2] 
  1. Laboratorium voor Isotopen-Geologie, Amsterdam (Netherlands)
  2. Rijksuniversiteit Utrecht (Netherlands). Inst. voor Aardwetenschappen
Publication Date:
Aug 01, 1982
Product Type:
Journal Article
Reference Number:
AIX-14-717128; EDB-83-052810
Resource Relation:
Journal Name: Precambrian Res.; (Netherlands); Journal Volume: 19:1
Subject:
58 GEOSCIENCES; MONAZITES; ISOTOPE DATING; SPAIN; ZIRCON; GNEISSES; GRANITES; INCLUSIONS; ISOTOPE RATIO; LEAD; MASS SPECTROSCOPY; MICA; PALEOZOIC ERA; RUBIDIUM; STRONTIUM; URANIUM; ACTINIDE COMPOUNDS; ACTINIDES; AGE ESTIMATION; ALKALI METALS; ALKALINE EARTH METALS; DEVELOPING COUNTRIES; ELEMENTS; EUROPE; GEOLOGIC AGES; IGNEOUS ROCKS; MATERIALS; METALS; METAMORPHIC ROCKS; MINERALS; OXYGEN COMPOUNDS; PHOSPHATES; PHOSPHORUS COMPOUNDS; PLUTONIC ROCKS; RADIOACTIVE MATERIALS; RADIOACTIVE MINERALS; RARE EARTH COMPOUNDS; ROCKS; SILICATE MINERALS; SILICATES; SILICON COMPOUNDS; SPECTROSCOPY; THORIUM COMPOUNDS; THORIUM MINERALS; THORIUM PHOSPHATES; TRANSITION ELEMENT COMPOUNDS; WESTERN EUROPE; ZIRCONIUM COMPOUNDS; ZIRCONIUM SILICATES; 580100* - Geology & Hydrology- (-1989)
OSTI ID:
6559394
Country of Origin:
Netherlands
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: PCBRB
Submitting Site:
HEDB
Size:
Pages: 1-29
Announcement Date:

Journal Article:

Citation Formats

Kuijper, R P, Priem, H N.A., and Den Tex, E. Late Archaean-early Proterozoic source ages of zircons in rocks from the Paleozoic orogen of western Galicia, NW Spain. Netherlands: N. p., 1982. Web.
Kuijper, R P, Priem, H N.A., & Den Tex, E. Late Archaean-early Proterozoic source ages of zircons in rocks from the Paleozoic orogen of western Galicia, NW Spain. Netherlands.
Kuijper, R P, Priem, H N.A., and Den Tex, E. 1982. "Late Archaean-early Proterozoic source ages of zircons in rocks from the Paleozoic orogen of western Galicia, NW Spain." Netherlands.
@misc{etde_6559394,
title = {Late Archaean-early Proterozoic source ages of zircons in rocks from the Paleozoic orogen of western Galicia, NW Spain}
author = {Kuijper, R P, Priem, H N.A., and Den Tex, E}
abstractNote = {U-Pb data are reported for nine suites of zircons and three monazites from the Paleozoic orogen in western Galicia: one paragneiss and six orthogneisses from the early Paleozoic basement, and two Carboniferous (ca. 310 Ma old) intrusions of two-mica granite. New whole-rock Rb-Sr analyses, along with earlier data, indicate an age of ca. 470-440 Ma (Ordovician) for the emplacement of the granitic precursors of the orthogneisses. Monazite from the paragneiss also yields an U-Pb age of ca. 470 Ma. From the high initial /sup 87/Sr//sup 86/Sr ratios an involvement of Precambrian continental crust material is evident in the generation of the early Paleozoic suite of granites, while the zircon U-Pb data give evidence of the presence of about 3.0-2.0 Ga old (late Archaean-early Proterozoic) components in the source material. Zircons from the oldest sedimentary rocks in the area, now present as catazonal paragneisses and a likely source for the granites, likewise reveal a provenance age of 3.0-2.0 Ga.}
journal = {Precambrian Res.; (Netherlands)}
volume = {19:1}
journal type = {AC}
place = {Netherlands}
year = {1982}
month = {Aug}
}