Depositional environments of the Prince Creek Formation along the east side of the Toolik River, Sagavanirktok Quadrangle, North Slope, Alaska

Flaig, P. P.; Kolk, Dolores A. van der

doi:10.14509/29407

Cited by 1 publication

(1 citation statement)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Paleocene deposits found along the Toolik and Sagavanirktok rivers (Figure 1C,D) are those of river channels and associated crevasse splays, crevasse channels, and levee deposits that alternate with thick lacustrine-palustrine deposits and coals [36]. Paleocene samples are primarily from palustrine to lacustrine deposits and coal (Figure 1C,D).…”

Section: Sample Materials From the Prince Creek Formation Colville Ba...mentioning

confidence: 99%

Stable Isotope Tracers of Cretaceous Arctic Paleoprecipitation

et al. 2022

View full text Add to dashboard Cite

We report estimated stable isotope compositions of depositional waters and paleoprecipitation from the Cretaceous Arctic to further elucidate the role of the global hydrologic cycle in sustaining polar warmth during that period. Estimates are based on new hydrogen isotopic analyses of n-alkane biomarkers extracted from Late Cretaceous and mid-Cretaceous terrestrial deposits in northern Alaska and the Canadian High Arctic. We integrate these new results with earlier published work on oxygen isotopic analyses of pedogenic siderites, dinosaurian tooth enamel phosphates, and pedogenic clay minerals from the same field areas. Average Late Cretaceous δD values of −143‰ VSMOW corresponded with average δ18O values of −24.1‰ VSMOW, and average mid-Cretaceous δD values of −106‰ VSMOW corresponded with average δ18O values of −22.1‰ VSMOW. The distributions of water isotope δD and δ18O values from Cretaceous Arctic deposits do not intersect with the Global Meteoric Water Line, suggesting an apparent deuterium excess ranging from about 40 to 60 per mil. We considered several possible explanations for these Cretaceous results including (1) mass-balance changes in zonal patterns of evaporation and precipitation at lower latitudes, (2) concentration of 2H in leaf tissue waters from continuous transpiration by coniferous paleofloras during the Arctic growing season, and (3) concentration of 2H in the groundwaters of methane-emitting Arctic soils.

show abstract

Section: Sample Materials From the Prince Creek Formation Colville Ba...mentioning

confidence: 99%