Shallow seismicity and the classification of structures in the Lau back-arc basin

DOI

We compared Centroid Moment Tensors (CMTs), calculated for large (Mw >5), shallow (<30 km) seismic events to the orientations of seafloor lineaments (n = 4000) mapped throughout the Lau Basin, in the SW Pacific. Ship-based multibeam was combined with vertical gravity gradient data to provide comprehensive coverage to create the lineament map. By comparing the possible focal planes of the CMTs to the orientations of the lineaments, the most likely fault plane solutions were selected, thus classifying the faults and establishing the nature of the highly variable stress regimes in the basin. We resolved the strike, dip and dip direction of 308 faults, and classified 258 additional structures by fault type. The majority of the table was data downloaded from the Global Centroid Moment Tensor (GCMT) database (www.globalcmt.org: accessed October 2018). For more details about the column headers consult the GCMT database website. New data from this study include the latitude and longitude error estimates (in meters), the classified faults (column: 'fault_type'), and the stress domain (column: 'stress_domain'), allocated to each of the classified faults.

Identifier
DOI https://doi.org/10.1594/PANGAEA.913797
Related Identifier https://doi.org/10.1029/2020GC008924
Related Identifier https://doi.org/10.1029/JB086iB04p02825
Related Identifier https://doi.org/10.1016/j.pepi.2012.04.002
Related Identifier https://www.globalcmt.org
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.913797
Provenance
Creator Baxter, Alan T ORCID logo; Hannington, Mark D; Stewart, Margaret S (ORCID: 0000-0002-0633-252X); Emberley, Justin M; Breker, Kaitlyn; Krätschell, Anna ORCID logo; Petersen, Sven (ORCID: 0000-0002-5469-105X); Brandl, Philipp A ORCID logo; Klischies, Meike; Mensing, Rebecca; Anderson, Melissa O
Publisher PANGAEA
Publication Year 2020
Funding Reference National Science Foundation https://doi.org/10.13039/100000001 Crossref Funder ID 0824694 https://www.nsf.gov/awardsearch/showAward?AWD_ID=0824694 Global Centroid Moment Tensor Project / EAR-16-39131
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Language English
Resource Type Dataset
Format text/tab-separated-values
Size 42372 data points
Discipline Earth System Research
Spatial Coverage (-179.990W, -26.600S, -173.140E, -14.000N)
Temporal Coverage Begin 1977-01-17T00:04:38Z
Temporal Coverage End 2017-12-16T00:05:40Z