Skip Links

USGS - science for a changing world

Data Series 899

U-Pb Zircon Age Data for Selected Sedimentary, Metasedimentary, and Igneous Rocks from Northern and Central Alaska

By Thomas E. Moore

Thumbnail of and link to report PDF (1.5 MB)Introduction

This publication contains the complete results of U-Pb zircon age dating studies of sedimentary and metasedimentary units from northern and central Alaska that are discussed and interpreted in other reports by the author. Most of the U-Pb ages are of detrital zircons from sandstones, although U-Pb ages from igneous and sedimentary clasts from conglomerates in some of those same units are also included. In addition to the data presented in the interpretive reports, this publication includes data that were excluded due to discordance, analytical problems, and publication space limitations. The U-Pb age data are reported in Excel-file format so that they can be easily downloaded and referenced or reinterpreted by future workers.

Data from two studies are included in this report. The first study, by Dumoulin and others (2013), reported the detrital zircon U-Pb age analysis of a single sample from the Upper Mississippian Ikalukrok unit of the Kuna Formation (table 1). The second study is that of Moore and others (in press), which focuses on the Upper Jurassic and Lower Cretaceous part of the Brookian sequence in the western Brooks Range (17 samples; table 2). For the latter study, samples were analyzed from the following units (1) the Upper Jurassic unit, Jw, of Curtis and others (1984), (2) the Lower Cretaceous Igrarok Hills unit of Moore and others (2002), (3) the Upper Jurassic and Lower Cretaceous Okpikruak Formation, (4) the Lower Cretaceous lower Brookian shale of Mull (1995), (5) the Lower Cretaceous Mount Kelly Graywacke Tongue of the Fortress Mountain Formation, (6) and the upper Lower Cretaceous Nanushuk Formation as redefined by Mull and others (2003). The results for each study are reported in separate Excel files, with individual samples in each study being shown as separate sheets within the files. The analyses of individual zircons are listed separately on the sheet according to the filtering schemes of the study and by the type of mass spectrometer used.

First posted November 20, 2014

  • Table 1 XLS (78 kB)
    Complete laser ablation inductively coupled plasma mass spectrometry detrital zircon U-Pb analytical data from sample DDH-796 from the Upper Mississippian Ikalukrok unit of the Kuna Formation in the Red Dog Mineral District.
  • Table 2 XLS (587 kB)
    Complete laser ablation inductively coupled plasma mass spectrometry zircon U-Pb analytical data from various units of the Brookian sequence.

This publication is only available online

For additional information, contact:
Geology, Minerals, Energy, and Geophysics Science Center
U.S. Geological Survey
345 Middlefield Road, MS 901
Menlo Park, CA 94025-3591

Part or all of this report is presented in Portable Document Format (PDF). For best results viewing and printing PDF documents, it is recommended that you download the documents to your computer and open them with Adobe Reader. PDF documents opened from your browser may not display or print as intended. Download the latest version of Adobe Reader, free of charge.

Suggested citation:

Moore, T.E., 2014, U-Pb zircon age data for selected sedimentary, metasedimentary, and igneous rocks from Northern and Central Alaska: U.S. Geological Survey Data Series 899, 4 p.,

ISSN:2327-638X (online)



U-Pb Analytical Techniques and Methodology Used by Apatite to Zircon, Inc


Tables (2)

Accessibility FOIA Privacy Policies and Notices logo U.S. Department of the Interior | U.S. Geological Survey
Page Contact Information: Contact USGS
Page Last Modified: Monday, November 28, 2016, 08:30:50 PM