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

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Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Alicia F. Balster-Gee
Originator: Daniel S. Brothers
Originator: Nathaniel C. Miller
Originator: Jared W. Kluesner
Originator: Daniel R. Ebuna
Originator: Amy E. East
Publication_Date: 2017
Title:

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

Geospatial_Data_Presentation_Form: seismic-reflection data in SEG-Y format
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/F7KP81BQ

Publication_Information:

Publication_Place:

Pacific Coastal and Marine Science Center, Santa Cruz, California

Publisher: U.S. Geological Survey

Online_Linkage: https://doi.org/10.5066/F7KP81BQ
Online_Linkage:

https://www.sciencebase.gov/catalog/item/5a0201c1e4b0531197b72d36

Description:

Abstract:

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.

Purpose:

The U.S. Geological Survey (USGS) collected high-resolution seismic-reflection profiles in August 2016 in the Gulf of Alaska, between Icy Point and Dixon Entrance. The survey was designed to map the Queen Charlotte-Fairweather Fault zone that extends along the southeast Alaska continental margin. This work was funded by the USGS Coastal and Marine Geology Program‚ Marine Geohazards Project. These high-resolution seismic-reflection profiles image the shallow structure and stratigraphy along the Queen Charlotte-Fairweather Fault system. This data can be used to better understand its deformation history and the interplay between Quaternary deformation and sedimentary processes. This geologic information is essential to hazard assessment and coastal and marine spatial planning at Federal, State and local levels, as well as to future research on the geomorphic, sedimentary, tectonic and climatic record of southeastern Alaska.

Supplemental_Information:

Additional information about the field activities from which these data were derived is available online at: https://cmdgs.marine.usgs.gov/fan_info.php?fan=2016-656-FA Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 21060807
Ending_Date: 20160826

Currentness_Reference: ground condition at time data were collected

Status:

Progress: In work
Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -147.794
East_Bounding_Coordinate: -133.78027201
North_Bounding_Coordinate: 60.73911751
South_Bounding_Coordinate: 54.63955538

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:5a0201c1e4b0531197b72d36

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: geoscientificInformation

Theme:

Theme_Keyword_Thesaurus: Global Change Master Directory (GCMD)
Theme_Keyword: Bathymetry
Theme_Keyword: Continental Margins

Theme:

Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: Bathymetry and Elevation

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: sub-bottom profiling

Theme:

Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: seismic reflection profiling

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Theme_Keyword: Pacific Coastal and Marine Science Center
Theme_Keyword: PCMSC

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Pacific Ocean
Place_Keyword: State of Alaska
Place_Keyword: Gulf of Alaska
Place_Keyword: Dixon Entrance
Place_Keyword: Icy Point
Place_Keyword: Chatham Strait
Place_Keyword: Sitka
Place_Keyword: Yakutat
Place_Keyword: Glacier Bay
Place_Keyword: Mount Edgecumbe

Place:

Place_Keyword_Thesaurus: NGA GEOnet Names Server (GNS)
Place_Keyword: Noyes Canyon
Place_Keyword: Yakobi Valley

Access_Constraints: None
Use_Constraints:

USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data. This information is not intended for navigation purposes.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

U.S. Geological Survey, Pacific Coastal and Marine Science Center

Contact_Person: PCMSC Science Data Coordinator

Contact_Address:

Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060

Contact_Voice_Telephone: 831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name:

https://www.sciencebase.gov/catalog/file/get/5a0201c1e4b0531197b72d36?name=2016-656-FA_Index_map.jpg&allowOpen=true

Browse_Graphic_File_Description: index map
Browse_Graphic_File_Type: JPEG

Native_Data_Set_Environment: SEG-Y Rev 1

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: Identified as best available version.

Logical_Consistency_Report:

Subbottom data were collected during USGS cruise 2016-656-FA using a 64-channel (1.56 and 3.25 m group spacing) Geometrics GeoEel digital hydrophone streamer, 2.4 kJ Applied Acoustics power supply and Delta Sparker sound source. Quality control was conducted during the collection process.

Completeness_Report:

Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Position data were provided by a Differential Global Positioning System (DGPS) navigation receiver.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Depths shown in the seismic data files are in milliseconds (round trip travel time) and are referenced to sea level.

Lineage:

Process_Step:

Process_Description:

Seismic-reflection data were collected using a sparker system that creates an acoustic signal by discharging a high-voltage electrical pulse between electrodes and a ground that generates a frequency spectrum. Data were acquired using a 64-channel (6.25 m group spacing) Geometrics GeoEel digital hydrophone streamer and recorded in SEG-Y 32-bit floating point.

Process_Date: 20160826

Process_Step:

Process_Description:

Seismic-reflection data were processed using Echos by Paradigm Geophysical. The following processing steps were applied to each line: AGC applied over 1000ms gate, normal moveout correction (constant 1550 m/s velocity), stack, and correct navigation was written to header bytes 181 and 185.

Source_Used_Citation_Abbreviation: brute stack
Process_Date: 20171001

Process_Step:

Process_Description:

Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed.

Process_Date: 20201019
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross

Contact_Position: Marine Geologist
Contact_Address:

Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598

Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov

Process_Step:

Process_Description:

Performed minor edits to the metadata to correct typos. No data were changed

Process_Date: 20211013
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: Susan A. Cochran

Contact_Position: Geologist
Contact_Address:

Address_Type: Mailing and Physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060

Contact_Voice_Telephone: 831-460-7545
Contact_Electronic_Mail_Address: scochran@usgs.gov

Spatial_Data_Organization_Information:

Indirect_Spatial_Reference:

Horizontal X and Y locations for the seismic profile locations are provided in ASCII position files and are stored in the SEG-Y data trace headers in the standard header locations.

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: WGS 1984 UTM Zone 8N
Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -123.0
Latitude_of_Projection_Origin: 0.0
False_Easting: 500000.0
False_Northing: 0.0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:

Abscissa_Resolution: 0.0001
Ordinate_Resolution: 0.0001

Planar_Distance_Units: Meter

Geodetic_Model:

Horizontal_Datum_Name: D WGS 1984
Ellipsoid_Name: WGS 1984
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257223563

Vertical_Coordinate_System_Definition:

Depth_System_Definition:

Depth_Datum_Name: Local surface
Depth_Resolution: 0.1
Depth_Distance_Units: meters
Depth_Encoding_Method: Attribute values

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:

Navigation and seismic shots with Time Stamp in standard SEG-Y file format

Entity_and_Attribute_Detail_Citation:

Society of Exploration Geophysicists (SEG) Technical Standards, available for download at http://seg.org/Publications/SEG-Technical-Standards

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey - ScienceBase

Contact_Address:

Address_Type: mailing and physical
Address: Denver Federal Center, Building 810, Mail Stop 302
City: Denver
State_or_Province: CO
Postal_Code: 80225

Contact_Voice_Telephone: 1-888-275-8747
Contact_Electronic_Mail_Address: sciencebase@usgs.gov

Resource_Description:

Zip files contain high-resolution seismic-reflection (SEG-Y) data collected during PCMSC field activity 2016-656-FA. The data are divided up and presented by navigation line(s), as reflected in the individual zip file name(s).

Distribution_Liability:

Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: SEG-Y
Format_Version_Number: SEG-Y rev 1
Format_Information_Content: Zip file contains the raw seismic data per navigation line
File_Decompression_Technique:

Winzip, 7-zip, or Winrar are free software that will open .zip files

Transfer_Size: 939.7

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://www.sciencebase.gov/catalog/file/get/5a0201c1e4b0531197b72d36?name=2016-656-FA_mcs_lines21_and_77.zip

Network_Resource_Name: https://doi.org/10.5066/F7KP81BQ

Access_Instructions: Data can be downloaded via the Internet

Fees: None.

Technical_Prerequisites:

Use of SEG-Y data requires specialized software, such as ProMax and Seisworks by Landmark Geophysical; FOCUS and SeisX by Paradigm Geophysical; SPW by Parallel Geoscience; VISTA by Seismic Image Software; SeiSee by Dalmorneftegeophysica (DMNG); amongst others.

Metadata_Reference_Information:

Metadata_Date: 20211013
Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

U.S. Geological Survey, Pacific Coastal and Marine Science Center

Contact_Person: PCMSC Science Data Coordinator

Contact_Address:

Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060

Contact_Voice_Telephone: 831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov

Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/ScienceBase/DR_F7KP81BQ/2016-656-FA_metadata.html>