{"help": "https://data.gov.au/data/api/3/action/help_show?name=package_show", "success": true, "result": {"archived": false, "author_email": null, "contact_point": "clientservices@ga.gov.au", "creator_user_id": "c2fbbe4a-4ba0-4945-808b-67454605a4cf", "duplicate_score": 2, "geospatial_topic": [], "id": "45d41d99-5002-4d6c-a8d9-4bf796f643d9", "isopen": false, "language": "eng", "license_id": "notspecified", "license_title": "notspecified", "maintainer": null, "maintainer_email": null, "metadata_created": "2025-10-16T16:37:55.901671", "metadata_modified": "2025-10-16T16:37:55.901678", "name": "metamorphic-evolution-and-integrated-terrane-analysis-of-the-eastern-yilgarn-craton-rationale-m", "notes": "A metamorphic database covering the entire eastern Yilgarn Craton has been compiled from pre-existing mapping, 14,500 sites with qualitative metamorphic information, and 470 new key sites with detailed quantitative metamorphic data including P, T, temperature/depth ratio and P-T paths. The derived temporal and spatial patterns contrast with previous tectonic models and invariant crustal depth with the single prograde metamorphic event of the long-standing metamorphic paradigm. In particular, there are large variations in peak metamorphic crustal depths (12 to 31 km), and five metamorphic periods can now be recognised.\n•  Ma:     Very localised, low-P granulite of high temperature/depth ratio (>50\u00c2\u00baC/km).\n•  M1:     High-P (8.7kb), low temperature/depth ratio (<20\u00c2\u00baC/km) assemblages localised to major shear zones with clockwise isothermal decompression P-T paths.\n•  M2: Regional matrix parageneses with T ranging 300-550\u00c2\u00baC across greenstone belts and elevated temperature/depth ratio of 30-40\u00c2\u00baC/km throughout. Tight clockwise paths evolved through maximum prograde pressures of 6 kb and peak metamorphic pressures of 3.5-5.0 kb.\n•  M3a: An extension related thermal pulse localised on the Ockerburry Fault and post-volcanic late basins. Anticlockwise paths to peak conditions of 500-580\u00c2\u00baC and 4.0 kb, define moderately high temperature/depth ratio of 40-50\u00c2\u00baC/km.\n• M3b: Multiple localised hydrothermal alteration events during a period of exhumation from 4 kb to 1 kb.\nMetamorphic patterns during each event have been temporally and spatially integrated with the new deformation framework (Blewett & Czarnota, 2007c) by a process of metamorphic domain analysis and using metamorphic field gradients. The continual evolution with time of fundamental metamorphic parameters throughout the entire history have been constructed as evolution curves and integrated with the deformation, magmatic, stratigraphic and mineralization history.\nRelated materialEast Yilgarn Craton Metamorphism and Strain - Map.", "num_resources": 3, "num_tags": 10, "organization": {"id": "91f054ec-d0c3-4d42-a89a-5daa2c7a6818", "name": "geoscience-australia-data", "title": "Geoscience Australia Data", "type": "organization", "description": "Harvester for Geoscience Australia Data", "image_url": "", "created": "2025-06-23T12:29:08.024111", "is_organization": true, "approval_status": "approved", "state": "active"}, "original_harvest_source": {"site_url": "https://ecat.ga.gov.au", "href": "https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/metamorphic-evolution-and-integrated-terrane-analysis-of-the-eastern-yilgarn-craton-rationale-m", "title": "Geoscience Australia"}, "owner_org": 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