Rare earth elements in granitic rocks

T. Koljonen, Rolf Rosenberg

Research output: Contribution to journalArticleScientificpeer-review

29 Citations (Scopus)

Abstract

The younger granites in Finland contain more REE than the older ones. In the youngest, postorogenic rapakivi granites, the total REE concentration is highest, the light REE are more enriched, and the negative Eu anomaly is more pronounced than in the older granites. The enrichment of the light REE, the anomalous behavior of the extreme elements (La, Ce, and Lu) in normalized graphs, and the depletion of Eu indicate the degree of differentiation the rock has undergone. These features are usually more pronounced in large, homogeneous granites than in metamorphic or volcanogenic rocks. Silicic vein rocks usually contain less REE than the granites proper; the distribution pattern in many is as in granites, but in some the heavy elements are more enriched. The positive Eu anomaly in Precambrian metamorphic rocks is tentatively attributed to metamorphic differentiation and to the secretion of silicic material from the host rock.

Original languageEnglish
Pages (from-to)249-261
Number of pages13
JournalLithos
Volume7
Issue number4
DOIs
Publication statusPublished - 1974
MoE publication typeNot Eligible

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Rare earth elements
rare earth element
Rocks
rock
Metamorphic rocks
anomaly
rapakivi
secretion
metamorphic rock
host rock
Precambrian
young

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Koljonen, T. ; Rosenberg, Rolf. / Rare earth elements in granitic rocks. In: Lithos. 1974 ; Vol. 7, No. 4. pp. 249-261.
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Koljonen, T & Rosenberg, R 1974, 'Rare earth elements in granitic rocks', Lithos, vol. 7, no. 4, pp. 249-261. https://doi.org/10.1016/0024-4937(74)90046-2

Rare earth elements in granitic rocks. / Koljonen, T.; Rosenberg, Rolf.

In: Lithos, Vol. 7, No. 4, 1974, p. 249-261.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Rare earth elements in granitic rocks

AU - Koljonen, T.

AU - Rosenberg, Rolf

PY - 1974

Y1 - 1974

N2 - The younger granites in Finland contain more REE than the older ones. In the youngest, postorogenic rapakivi granites, the total REE concentration is highest, the light REE are more enriched, and the negative Eu anomaly is more pronounced than in the older granites. The enrichment of the light REE, the anomalous behavior of the extreme elements (La, Ce, and Lu) in normalized graphs, and the depletion of Eu indicate the degree of differentiation the rock has undergone. These features are usually more pronounced in large, homogeneous granites than in metamorphic or volcanogenic rocks. Silicic vein rocks usually contain less REE than the granites proper; the distribution pattern in many is as in granites, but in some the heavy elements are more enriched. The positive Eu anomaly in Precambrian metamorphic rocks is tentatively attributed to metamorphic differentiation and to the secretion of silicic material from the host rock.

AB - The younger granites in Finland contain more REE than the older ones. In the youngest, postorogenic rapakivi granites, the total REE concentration is highest, the light REE are more enriched, and the negative Eu anomaly is more pronounced than in the older granites. The enrichment of the light REE, the anomalous behavior of the extreme elements (La, Ce, and Lu) in normalized graphs, and the depletion of Eu indicate the degree of differentiation the rock has undergone. These features are usually more pronounced in large, homogeneous granites than in metamorphic or volcanogenic rocks. Silicic vein rocks usually contain less REE than the granites proper; the distribution pattern in many is as in granites, but in some the heavy elements are more enriched. The positive Eu anomaly in Precambrian metamorphic rocks is tentatively attributed to metamorphic differentiation and to the secretion of silicic material from the host rock.

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DO - 10.1016/0024-4937(74)90046-2

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