{
 "schema": "ausmt-survey-metadata",
 "version": "0.1",
 "survey_id": "isa-extension-bbmt-2014",
 "title": "Isa Extension Broadband MT 2014",
 "dates": {
  "coverage": {
   "year_start": 2014,
   "year_end": 2014
  },
  "issued": "2016-07-15"
 },
 "identifiers": [
  {
   "scheme": "URL",
   "identifier": "https://geoscience.data.qld.gov.au/data/magnetotelluric/mt099993"
  }
 ],
 "abstract": "Moombarriga Geoscience recorded 669 broadband magnetotelluric soundings on a cross shaped grid, 2 km along lines and 5 km between them, over the southern Mount Isa Inlier south of Dajarra in Queensland, from 18 July to 21 November 2014, released by the Geological Survey of Queensland; 666 are served here, three withheld. The survey targeted extensions of the mineralised Mount Isa Group shale basins concealed beneath cover near the Mount Isa Fault. Each site laid 100 m crossed dipoles with non-polarising electrodes and three coils and recorded about 16 hours against another site as remote reference. 653 served soundings used Phoenix MTU-5A receivers and are served as summed and edited spectra covering 0.003125 s to 2941 s; 13 used Metronix ADU-07e receivers and are served as impedance covering 9.6e-05 s to 2941 s. All 666 carry the impedance tensor and vertical transfer function, over 72 to 100 periods each. The served files cluster to 663 positions within 150 m.",
 "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 Pty Ltd",
   "name_type": "organisation",
   "role": "DataCollector"
  },
  {
   "name": "Geoscience Australia",
   "name_type": "organisation",
   "role": "ProjectMember",
   "ror": "https://ror.org/04ge02x20"
  }
 ],
 "organisations": [
  {
   "name": "Geological Survey of Queensland",
   "roles": [
    "custodian",
    "publisher",
    "distributor"
   ],
   "primary_custodian": true
  },
  {
   "name": "Moombarriga Geoscience Pty Ltd",
   "roles": [
    "data_collector"
   ]
  }
 ],
 "citation": {
  "preferred_identifier": {
   "scheme": "URL",
   "identifier": "https://geoscience.data.qld.gov.au/data/magnetotelluric/mt099993"
  },
  "text_source": "ausmt_generated"
 },
 "rights": {
  "license": "CC-BY-4.0",
  "access": "open"
 },
 "relationships": [
  {
   "identifier": "a6c5f379-39c5-4e45-b80a-1fd6e40ef77a",
   "identifier_type": "Handle",
   "relation": "IsVariantFormOf"
  }
 ],
 "attribution": {
  "custodian": "Geological Survey of Queensland",
  "statement": "Isa Extension Area 1, Geological Survey of Queensland, record mt099993, acquired by Moombarriga Geoscience Pty Ltd. Licensed CC-BY-4.0.",
  "changes_made": true,
  "changes_summary": "The served set is 666 of the 669 delivered soundings: IEB0562A, IEB1650A and IEB1813A are withheld under owner ruling 2026-09-19 (the YMB057 precedent) because each declares a frame its own header contradicts, and their delivered files are kept unaltered under provenance/as-delivered/ with the measurements and the ruling recorded in provenance/served-files.json. Four of the 666 served files carry a header date repair and no other change: where ACQDATE printed the exporter placeholder 01/01/01 it was SET from Appendix 1 of the contractor's report delivered in the same archive, IEB0955A and IEB0956A to 2014-08-13 and IEB0961A and IEB0962A to 2014-08-15, and FILEDATE was rewritten from 09/23/14 into 2014-09-23. Nothing was blanked and no number in any file was touched. The delivered bytes of those four are kept under provenance/as-delivered/ beside the three withheld files, seven in all. The other 662 served files are byte identical to their archive member.",
  "declared_by": "Ben Kay",
  "declared_date": "2026-09-19"
 },
 "provenance": {
  "generated": "2026-09-20T05:05:11Z",
  "generator": "ausmt/extract.build_portal 0.2.1"
 }
}