{
 "schema": "ausmt-survey-metadata",
 "version": "0.1",
 "survey_id": "abra-2014",
 "title": "Abra MT 2014",
 "dates": {
  "coverage": {
   "year_start": 2014,
   "year_end": 2014
  },
  "issued": "2017-09-14"
 },
 "abstract": "Magnetotelluric and audio magnetotelluric soundings recorded by Moombarriga Geoscience for Abra Mining between 18 September and 2 November 2014 over the Abra deposit, Western Australia, on five north to south profiles and one east to west profile, with Metronix ADU-07e recorders, MFS06e coils and 50 m dipoles, processed in ProcMT. The release holds one transfer function at each of 190 sites; 189 are served and one, which fails the impedance sign check, is withheld. 146 of the served headers print a northern latitude for sites at 24.6 S; their served copies take the south sign each file's own reference position prints, and the delivered files are kept. Served periods run 0.00004 s to 704 s, 18 to 71 per station, all with tipper; 29 served files declare a 90 degree impedance rotation and are served as stored.",
 "subjects": [
  {
   "code": "370602",
   "scheme": "ANZSRC-FoR-2020",
   "label": "Electrical and electromagnetic methods in geophysics",
   "uri": "https://linked.data.gov.au/def/anzsrc-for/2020/370602"
  }
 ],
 "contributors": [
  {
   "name": "Moombarriga Geoscience",
   "name_type": "organisation",
   "role": "DataCollector"
  },
  {
   "name": "Abra Mining Pty Limited",
   "name_type": "organisation",
   "role": "RightsHolder"
  },
  {
   "name": "Abra Mining Pty Limited",
   "name_type": "organisation",
   "role": "Sponsor"
  },
  {
   "name": "Geological Survey of Western Australia",
   "name_type": "organisation",
   "role": "Distributor",
   "ror": "https://ror.org/05h2dda38"
  }
 ],
 "organisations": [
  {
   "name": "Geological Survey of Western Australia",
   "ror": "https://ror.org/05h2dda38",
   "roles": [
    "custodian",
    "publisher",
    "distributor"
   ],
   "primary_custodian": true
  },
  {
   "name": "Abra Mining Pty Limited",
   "roles": [
    "rights_holder"
   ]
  },
  {
   "name": "Moombarriga Geoscience",
   "roles": [
    "data_collector"
   ]
  }
 ],
 "rights": {
  "license": "CC-BY-4.0",
  "access": "open"
 },
 "relationships": [
  {
   "identifier": "https://magix.dmirs.wa.gov.au/api/surveylookup/getsurveybyid?surveyId=3991",
   "identifier_type": "URL",
   "relation": "IsVariantFormOf"
  },
  {
   "identifier": "https://geodownloads.dmp.wa.gov.au/downloads/geophysics/72580.zip",
   "identifier_type": "URL",
   "relation": "IsVariantFormOf"
  }
 ],
 "attribution": {
  "custodian": "Geological Survey of Western Australia",
  "custodian_ror": "https://ror.org/05h2dda38",
  "statement": "Sourced from the Geological Survey of Western Australia, MAGIX registration 72580, Abra MT 2014, delivery package 72580.zip, acquired by Moombarriga Geoscience for Abra Mining Pty Limited and licensed CC BY 4.0 under the owner's ruling of 2026-09-23.",
  "changes_made": true,
  "changes_summary": "146 of the 189 served files differ from their archive member in the sign of the >HEAD LAT value, restored from the same file's >=DEFINEMEAS REFLAT by _tools/repair_edi_header_hemisphere.py, and in nine record lines inserted after >INFO; no data value, frequency or other header value is changed, and each delivered file is kept unaltered under provenance/as-delivered/. The other 43 served files are the archive's members unchanged. ABR196A is withheld because the impedance sign gate refuses it, and its delivered file is kept unaltered as well.",
  "declared_by": "Ben",
  "declared_date": "2026-09-24"
 },
 "provenance": {
  "generated": "2026-09-28T04:39:22Z",
  "generator": "ausmt/extract.build_portal 0.2.1"
 }
}