U-Pb Isotopic Data and Ages of Detrital Zircon Grains and Graptolite Fossil
Data from Selected Rocks from the Western Alaska Range, Livengood area,
and Seward Peninsula, Alaska - 2018
Description
This data set contains two data sets. One data set is of U-Pb isotopic data
and associated ages of detrital zircon grains from 16 sedimentary and
metasedimentary rocks from the western Alaska Range, Livengood area and
Seward Peninsula, Alaska. Two samples were collected from the York Mountains
area of the Seward Peninsula of western Alaska. Three samples were collected
from the Livengood quadrangle of central Alaska. Eleven samples were collected
from the western Alaska Range of south-central Alaska. Detrital zircon grains
from each of the sixteen samples were separated and analyzed by Apatite to
Zircon, Inc. (A2Z) and Geosep Services (GSS) laboratories between 2011 and
2014, using laser-ablation-inductively-coupled-plasma-mass spectrometry
(LA-ICP-MS) techniques.
The second data set contains fossil identifications and age assignments from a
select sedimentary rock from the western Alaska Range of south-central
Alaska. Fossils were identified by visual inspection.
All samples were collected as part of geological mapping research
conducted between 1984 and 2014 and funded by the Mineral Resources Program
of the U.S. Geological Survey.