Chemical and isotopic compositions of rocks and minerals from the Franz Josef Land Archipelago

Rb, Sr, Sm, Nd, U, and Pb contents and Sr, Nd, and Pb isotopic composition were determined in tholeiite and subalkaline basalts (in both whole-rock samples and individual minerals) from the Franz Josef Land Archipelago. Isotopic data obtained for the Arctic basin are similar to those for islands fro...

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Bibliographic Details
Main Authors: Levsky, L K, Stolbov, N M, Bogomolov, E S, Vasil'eva, I M, Makar'eva, E M
Format: Dataset
Language:English
Published: PANGAEA 2006
Subjects:
2035-1
2134-1
2322-1
2335-1
2354-1
2359-1a
2361-3
2819-2
2827-3
2840-2
3033
3034
3035
3054
3068r
3069b
3072
3652-2a
3654-5
3672
3674-1
5505-1
5505-1a
5542-2
5547-2
Archive of Ocean Data
ARCOD
B-98-6
Franz Josef Land
G-93-1
MK-1
Arctic
Indian
Pacific
Arctic Basin
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.726276
https://doi.org/10.1594/PANGAEA.726276
Description
Summary:Rb, Sr, Sm, Nd, U, and Pb contents and Sr, Nd, and Pb isotopic composition were determined in tholeiite and subalkaline basalts (in both whole-rock samples and individual minerals) from the Franz Josef Land Archipelago. Isotopic data obtained for the Arctic basin are similar to those for islands from the Pacific, Atlantic, and Indian oceans. The assimilation of crustal (sedimentary) rocks by primary depleted material makes isochron determination of basalt age difficult or impossible. The subalkaline basalts (basaltic andesites) were presumably formed by the metasomatic introduction of incompatible elements in tholeiitie basalts and, only partially, through crustal contamination and fractional crystallization.

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