{
 "schema": "ausmt-survey-metadata",
 "version": "0.1",
 "survey_id": "north-queensland-2007",
 "title": "North Queensland MT Transect 2007",
 "dates": {
  "coverage": {
   "year_start": 2007,
   "year_end": 2007
  }
 },
 "abstract": "Three magnetotelluric transects run beside Geoscience Australia's deep crustal seismic lines in northern Queensland: 07GA-IG1 at Cloncurry, 07GA-IG2 at Georgetown and 07GA-GC1 at Charters Towers. Quantec Geoscience acquired and processed 116 tensor soundings for Terrex Seismic between 27 June and 27 September 2007, spaced about 10 km along the lines and remote referenced against another site reading on the same line at the same time. Each site recorded Ex, Ey, Hx, Hy and Hz on a Quantec RT-130 logger with 100 m dipoles and three induction coils; QuickLay stacked the cross spectra and Geotools wrote the final curves. AusMT serves all 116 files of the contractor's spectra-corrected final set, each carrying seven channels and 38 to 45 periods from 0.0042 s to as long as 4369 s, with impedance, tipper and errors derived from the cross spectra at read time. The coordinate defect at site 139 and the naming rule are documented in README.md.",
 "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"
  }
 ],
 "creators": [
  {
   "name": "Milligan, P.R.",
   "name_type": "person"
  },
  {
   "name": "Duan, J.",
   "name_type": "person"
  }
 ],
 "contributors": [
  {
   "name": "Quantec Geoscience Pty Ltd",
   "name_type": "organisation",
   "role": "DataCollector"
  },
  {
   "name": "Terrex Seismic Pty Ltd",
   "name_type": "organisation",
   "role": "ProjectLeader"
  },
  {
   "name": "Geoscience Australia",
   "name_type": "organisation",
   "role": "Distributor",
   "ror": "https://ror.org/04ge02x20"
  }
 ],
 "organisations": [
  {
   "name": "Geoscience Australia",
   "ror": "https://ror.org/04ge02x20",
   "roles": [
    "custodian",
    "distributor"
   ],
   "primary_custodian": true
  }
 ],
 "rights": {
  "license": "CC-BY-4.0",
  "access": "open"
 },
 "extent": {
  "bbox": {
   "west": 140.09555,
   "south": -20.994367,
   "east": 146.428717,
   "north": -18.044116
  }
 },
 "relationships": [
  {
   "identifier": "https://pid.geoscience.gov.au/dataset/ga/72864",
   "identifier_type": "URL",
   "relation": "IsVariantFormOf"
  }
 ],
 "provenance": {
  "generated": "2026-09-19T01:03:52Z",
  "generator": "ausmt/extract.build_portal 0.2.1"
 }
}