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Global compilation of published gas hydrate-related bottom simulating reflections

Metadata Updated: July 6, 2024

Bottom simulating reflections (BSRs) are seismic features that are imaged in marine sediments using high-energy, impulsive seismic sources such as air guns or generator-injector guns. BSRs often cut across sediment stratigraphy and are interpreted as marking the deepest depth at which gas hydrate can exist. Gas hydrate is a naturally occurring and widely distributed frozen form of water and gas (usually methane) stable at low temperatures (up to about 25 degrees Celsius [°C]) and intermediate pressures (those that usually correspond to greater than 500 meters water depth). BSRs have been mapped in all the world’s oceans, in inland seas (such as the Black Sea), and in Lake Baikal in Russia. This data release consists of a GeoPackage that compiles digitized BSR maps from published scientific papers and other sources into a single resource, with attribution to the original researchers. An associated spreadsheet provides the same descriptive information about each of the original BSR maps in a form accessible without opening the GeoPackage. A GeoPackage is an open-source, platform-independent, standards-based package of geospatial data for a geographic information system (GIS). To formulate the dataset, published BSR maps were georeferenced, digitized, and converted to a common geographic coordinate system, and the resulting files were assigned a quality factor based on characteristics of the original maps and the difficulty of georeferencing. As described in detail in the associated metadata, most maps had a single polygon or multiple polygons enclosing the area where BSRs were recognized by the original researchers. Some maps had only circles or ovals around areas interpreted as containing BSRs, and these geometric shapes were digitized for the database. A few maps indicated the precise segments of individual seismic lines where BSRs are identified, resulting in BSRs being digitized as polylines instead of polygons. Polygons for BSRs in the northern Gulf of Mexico and U.S. Atlantic margin are based on files provided for direct release (no georeferencing necessary) by the Bureau of Ocean Energy Management.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

Dates

Metadata Created Date June 1, 2023
Metadata Updated Date July 6, 2024

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date July 6, 2024
Publisher U.S. Geological Survey
Maintainer
@Id http://datainventory.doi.gov/id/dataset/2887bbc818544f8b0cdfd0a91b01fa56
Identifier USGS:63caaf8cd34e06fef14f3e2a
Data Last Modified 20230202
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://datainventory.doi.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id 5702ef8c-5f35-401e-b322-2ffd038dc911
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -158.577649,-61.512652,179.056773,81.538744
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash a40e585f7194059c92dedebf0bba83e6d1fec776ab4feb675f93d6f36dad442e
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -158.577649, -61.512652, -158.577649, 81.538744, 179.056773, 81.538744, 179.056773, -61.512652, -158.577649, -61.512652}

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