10.6084/m9.figshare.3454526.v1
T.S. RØhr
T.S.
RØhr
T. Andersen
T.
Andersen
H. Dypvik
H.
Dypvik
Provenance of Lower Cretaceous sediments in the Wandel Sea Basin, North Greenland
Geological Society of London
2016
zircon populations
crust components
Peary Land
age populations
Hf isotopes
Hf data
North Greenland Detrital zircons
Major hiati
plasma mass spectrometry
Neoarchaean zircon populations
laser ablation inductively
Wandel Sea Basin
ϵ Hf values
Peary Land display
Cretaceous sediments
0.91 Ga
Geology
2016-06-21 12:11:09
Dataset
https://geolsoc.figshare.com/articles/dataset/Provenance_of_Lower_Cretaceous_sediments_in_the_Wandel_Sea_Basin_North_Greenland/3454526
<p>Detrital zircons in Lower Cretaceous sedimentary formations from the Wandel Sea Basin (Kilen, Peary Land) were dated by U–Pb
and analysed for Hf isotopes by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). Samples from Kilen
and Peary Land display a wide range of U–Pb ages, with significant zircon populations at 1.0–1.1 and 1.8–2.0 Ga. Major hiati
occur between 2.1 and 2.4 and from 0.48 to 0.91 Ga. Low initial ϵ<sub>Hf</sub> values indicate that recycled crust components are significant in Caledonian-aged zircons, and in Palaeoproterozoic (1.8–2.0
Ga) and Neoarchaean zircon populations. Other U–Pb age populations in the studied samples are dominated by zircons with positive
ϵ<sub>Hf</sub> values indicating a significant contribution of mantle-derived material in these periods. A narrow range of ϵ<sub>Hf</sub> values is commonly seen within a given U–Pb age population, and the values seen in the samples are in general correlated
with the different age populations and their frequency. One exception is the 1.8–2.0 Ga population, where variations suggest
variable sources. The U–Pb and Hf data are consistent with Greenland as the sole source of zircon from the studied sandstones.
</p>