Samples and Observations Data (Mineral Resources Tasmania)
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This dataset shows point locations at which geological samples have been taken and/or (less commonly) geological observations or measurements have been made. Only basic information is included, but further data for each point may be available on-line from the Mineral Resources Tasmania website (go to Products and Services/Database Searches/Samples and Geochemistry Search or use this link): http://www.mrt.tas.gov.au/portal/samples-and-geochemistry-search and click on Search, then Export Results) Data attached to each sample ideally includes metric coordinates (or sometimes lat/long), locality name and description, positional accuracy (3D), field and registration numbers, originator, project, collection date, sample type and description, and may include lithology, lithostratigraphy, chronostratigraphy, minerals, mineralisation types, potential hazards, soil type, storage details, references and comments. Major and trace element analyses and assays, petrophysical data (density, magnetic, electrical, thermal, sonic velocity etc.), electron microprobe analyses of minerals, x-ray diffraction determination of mineralogy, soil tests, photographs, reports and other data may be attached and are also down-loadable. Most points refer to surface samples or observations, but down-hole data is also included for some sample types. Data is open to the public for 126,606 records and closed, restricted or reserved for 67,879. The largest dataset is of rock samples (111,778, including 26,685 with whole-rock chemical analyses by x-ray fluorescence). The stream sediment dataset consists of 52,281 samples, mainly collected for mineral exploration and with geochemical results attached. The soil sample dataset (19,626) includes samples collected both for mineral exploration and geotechnical properties. There are smaller datasets for minerals (i.e. specimens, 4579 samples), mineralised samples (e.g. ores; 2781), sediments (e.g. heavy mineral sands, building sand, gravel, clay, 976), tailings and mine waste (1,926), fossils (344), environmental samples (e.g. dust at mine sites; 160), artificial samples (e.g. slags, metallurgical products, concrete; 289) and concentrates (e.g. of sluiced or panned tin or gold; 107). Drill logs (839) and miscellaneous readings/observations (including physical property measurements; 1610) are also included.
Department and Company Reports (Mineral Resources Tasmania)
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The Tasmanian report database provides an index to over 10,000 reports held in hardcopy form by MRT. The reports date from 1878 to the present and form a comprehensive summary of exploration philosophy and activity. This database details many attributes of Department and Company reports and is available for free searching online (http://www.mrt.tas.gov.au). The reports include those issued by the Department of Mines and Mineral Resources Tasmania, and have been issued under various series including Geological Survey Bulletins, Underground Water Supply Papers, Mineral Resource surveys and Geological Survey Records, also printed reports by mining exploration companies on their mineral exploration activities in Tasmania and including seismic surveys and well completion reports relating to petroleum exploration in Tasmanian waters. Items include: title, author, company, tenement, location, key words (minerals, deposits, exploration methods) and a brief abstract.
Exploration Licence Data (Mineral Resources Tasmania)
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Current Exploration Licence polygons (including applications and exploration release areas) across Tasmania, with tenement information derived from the Tasmanian Information on Geoscience and Exploration Resources (TIGER) system; administered by Mineral Resources Tasmania (MRT), Department of State Growth. Exploration licence polygons delineate areas in which licence holders are permitted to explore for the listed categories of minerals: Category 1: metallic minerals and atomic substances; Category 2: coal, peat, lignite, oil shale and coal seam gas; Category 3: rock, stone, gravel, sand and clay used in construction, bricks and ceramics; Category 4: petroleum products except oil shale; Category 5: industrial minerals, precious stones, semi-precious stones; Category 6: any geothermal substance. Exploration licences may be granted over both Crown and private land, so long as that land falls under the Mineral Resources Development Act 1995. Mineral exploration activities may include: geological, geophysical and geochemical surveys, drilling, and taking samples of rock, soil, water or other substances for analysis. Mining is not an exploration activity and cannot occur on an exploration licence.
Mines and Mineral Occurrence Sites
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Sites where earth resources have been demonstrated. This includes metallics, industrial minerals and construction materials, but excludes oil, gas and groundwater resources which are recorded in OILGAS and BORES datasets. OILGAS will be available for external users within Petroleum Mapshare. It is thought that groundwater resources will be available to external users within a CLPR (Catchment and Land Protection) Mapshare View. The data is derived from Minerals and Petroleums RDBMS, which is known as VICMINE. Information on each site has been compiled mostly from historical literature, with only selected major sites visited in the field. NOTES CONCERNING GEOVIC "Mines and Mineral Occurrence" DISPLAY The type of mine/mineral occurrence displayed varies with the scale of the map view. Major and Intermediate size mines are displayed at all scales. Minor and Unknown size Mines are displayed at scales ranging from 1:1 to 1:500,000 MAJOR is for mine_size greater than= 85000000 MINOR is for mine_size less than 8500000 INTERMEDIATE is for mine_size between the two UNKNOWN is when the mine_size is unknown MINE_SIZE (better name would be MINE_VALUE) is a calculated dollar amount based on the total production and resource for each commodity multiplied by the commodity price (NOTE: these commodity prices have not been updated in some time eg: as of 13/1/2013 the gold price per ounce used was $526.70 - April 1985 prices) NOTES CONCERNING GEOVIC "Deposit Styles" DISPLAY A number of deposit style layers exist in GeoVic. The layers are based on particular values of the dep_style attribute - within this dataset. The dep_style attribute contains the results of classifying the mineral deposits of Victoria east of approximately 142°30' and west of 145°30', but excluding the Willaura (7422) 1:100 000 map sheet area. The classification is described in detail in Moore, D.H., 2007. "Classifying gold deposits in central and western Victoria, Australia. GeoScience Victoria Gold Undercover Report". GENERAL NOTES CONCERNING GEOVIC Refer to Mineral Regions 1M (MINERAL) for extent of brown and black coal fields, Heavy Mineral Sands 1M (MINSAND1M) for extent of strandline mineral sand deposits, and Heavy Minerals Sands WIM 1M (MINSAND1M) for extent of WIM style mineral sand deposits.