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

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.

Categories: Data; Tags: Alaska, Alaska Science Center, Detrital Zircon, Dundas Bay, GGGSC, All tags... Geikie Inlet, Geochronology, Geology, Geophysics, and Geochemistry Science Center, Glacier Bay, Glacier Bay National Park, Glacier Bay National Preserve, LA-ICPMS, Laser-Ablation Indictively-Coupled Plasma Mass Spectrometry, MRP, Microbeam Laboratory, Mineral Resources, Mineral Resources Program, Plutonic Rocks, Radiometric Dating, SEM-cathodoluminescence, Saint Elias plutonic suite, Th, Thorium, U-Pb, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), Uranium, Uranium-lead analysis, Fewer tags

Multichannel sparker seismic-reflection data of field activity 2016-656-FA; between Icy Point and Dixon Entrance, Gulf of Alaska from 2016-08-07 to 2016-08-26

This data release contains high-resolution multichannel seismic (MCS) reflection data collected in August of 2016 along the southeast Alaska continental margin. Structure perpendicular MCS profiles were collected along the Queen Charlotte-Fairweather fault. The data were collected aboard the R/V Norseman using a Delta sparker sound source and recorded on a 64-channel digital streamer. Subbottom acoustic penetration spans up to several hundreds of meters, and is variable by location.

Categories: Data; Tags: Bathymetry, Bathymetry and Elevation, CMGP, Chatham Strait, Coastal and Marine Geology Program, All tags... Continental Margins, Dixon Entrance, Glacier Bay, Gulf of Alaska, Icy Point, Mount Edgecumbe, Noyes Canyon, PCMSC, Pacific Coastal and Marine Science Center, Pacific Ocean, Sitka, State of Alaska, U.S. Geological Survey, USGS, Yakobi Valley, Yakutat, geoscientificInformation, oceans, seismic reflection profiling, sub-bottom profiling, Fewer tags

Multichannel minisparker seismic-reflection data of field activity 2015-651-FA; Chatham Strait and Cross Sound, southeastern Alaska from 2015-08-03 to 2015-08-21

This data release contains high-resolution multichannel seismic (MCS) reflection data collected in August of 2015 to explore marine geologic hazards of inland waterways of southeastern Alaska. Sub-bottom profiles were acquired in the inland waters between Glacier Bay and Juneau, including Cross Sound and Chatham Strait. High-resolution seismic-reflection profiles were acquired to assess evidence for active seabed faulting and submarine landslide hazards. The data were collected aboard the US Geological Survey R/V Alaskan Gyre. The seismic-reflection data were acquired using a 500-Joule minisparker source and a 48-channel Geometrics GeoEel digital streamer. Subbottom acoustic penetration spans up to several hundreds...

Categories: Data; Types: Citation; Tags: Bathymetry, Bathymetry and Elevation, CMG, CMGP, Chatham Strait, All tags... Coastal and Marine Geology Program, Continental Margins, Cross Sound, Glacier Bay, Juneau, Lynn Canal, PCMSC, Pacific Coastal and Marine Science Center, Pacific Ocean, State of Alaska, U.S. Geological Survey, USGS, geoscientificInformation, minisparker, oceans, seismic reflection profiling, sub-bottom profiling, Fewer tags

Chirp seismic-reflection data of field activity 2015-651-FA; Chatham Strait and Cross Sound, southeastern Alaska from 2015-08-03 to 2015-08-21

This data release contains high-resolution seismic reflection data collected in August of 2015 to explore marine geologic hazards of inland waterways of southeastern Alaska. Sub-bottom profiles were acquired in the inland waters between Glacier Bay and Juneau, including Cross Sound and Chatham Strait. High-resolution seismic-reflection profiles were acquired to assess evidence for active seabed faulting and submarine landslide hazards. The data were collected aboard the US Geological Survey R/V Alaskan Gyre. The seismic-reflection data were acquired using a tow-fish Edgetech 512 chirp subbottom profiler. Subbottom acoustic penetration spans up to several tens of meters, and is variable by location. This data release...

Categories: Data; Types: Citation; Tags: Bathymetry, Bathymetry and Elevation, CMG, CMGP, Chatham Strait, All tags... Coastal and Marine Geology Program, Continental Margins, Cross Sound, Glacier Bay, Juneau, Lynn Canal, PCMSC, Pacific Coastal and Marine Science Center, Pacific Ocean, State of Alaska, U.S. Geological Survey, USGS, chirp, geoscientificInformation, oceans, seismic reflection profiling, sub-bottom profiling, Fewer tags