U-Pb zircon data for: Cretaceous plutonic rocks of western Glacier Bay National Park and Preserve

• Main Authors: Holm-Denoma, Christopher, Pianowski, Laura S, Wilson, Frederic
• Format: Dataset
• Language: unknown
• Published: U.S. Geological Survey 2020
• Subjects: Mineral Resources; Dundas; Geikie Inlet; Glacier Bay; Western Glacier; glacier; Alaska
• Online Access: https://dx.doi.org/10.5066/p90hnep5; https://www.sciencebase.gov/catalog/item/5de5402de4b02caea0e8fa84

In 2016, with National Park Service support, several previously undated plutons were sampled in Glacier Bay National Park and Preserve along the west side of Glacier Bay for age determinations. Geochronologic analyses were conducted to determine the ages of the plutonic rocks in the Glacier Bay area. Five samples were collected by Frederic Wilson (USGS Alaska Science Center), from Dundas Bay and Geikie Inlet, and dated by laser ablation-inductively coupled plasma mass spectrometry U-Pb methods. The dates obtained ranged from approximately 112-118 Ma, indicating that these samples are younger than the Saint Elias plutonic suite (ca. 160 Ma-130Ma), which runs along the same trend as the sampled rocks to the south.