Zircon U-Pb and 40Ar/39Ar results from dikes collected within the Bruin Bay fault zone, lower Cook Inlet

Description

This data release presents 40Ar/39Ar step-heating geochronology results from rocks collected roughly 7 km southwest of Contact Point, Iliamna B-3 Quadrangle. Samples obtained from a felsic dike intruding the principal Bruin Bay fault plane near Contact Point produced biotite and plagioclase 40Ar/39Ar ages of 36.5 +/- 0.8 Ma and 31.5+/-0.7 Ma, respectively. The age dates inform stratigraphic, structural, and geochronologic studies along the western margin of lower Cook Inlet basin. The accompanying report also presents zircon U-Pb LA-ICP-MS geochronology results for dikes near Ursus Head.

Resources

Name Format Description Link
0 http://doi.org/10.14509/29544
0 http://doi.org/10.14509/23403
0 CSDGM IMPORT ERROR: No digtinfo/formcont http://doi.org/10.14509/29750
0 http://doi.org/10.14509/29750
0 http://doi.org/10.14509/29130
0 http://doi.org/10.14509/29457
0 http://doi.org/10.14509/24850

Tags

  • cenozoic
  • iliamna quadrangle
  • zircon
  • methods
  • tectonics
  • 40ar/39ar
  • mesozoic
  • rocks
  • sample location
  • geochronology
  • stratigraphy
  • structural geology
  • isotopes
  • structure
  • uranium
  • geologic
  • analyses
  • lead
  • eocene
  • volcanic
  • bedrock
  • geology
  • bedrock geology
  • cook inlet basin
  • ar-ar
  • cook inlet
  • analyses and sampling
  • fault displacement
  • plagioclase
  • contact point
  • u-pb
  • ursus head
  • oligocene
  • lab methods
  • age dates
  • volcanic rocks
  • analytical results
  • bruin bay fault
  • igneous
  • triassic
  • analytical lab results

Topics

  • Local Government

Categories