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RB 60/00082 Coober Pedy Opalfield.
Mapping of the Coober Pedy Opalfield has shown that opal occurrence, although erratic, is not entirely unpredictable. Several groups of workings are present in an area of about 150 square miles. The host rock is a distinctive pink and white...-
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Published: 30 Apr 1965
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RB 80/00026 Opal in South Australia.
Enlarged written version of a talk on the geology of opal, its occurrence and mining methods prepared for public presentation.-
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Published: 01 May 1980
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RB 86/00070 Andamooka Opalfields results of the 1984 prospecting scheme.
Andamooka Opal Fields, have been major world producer of precious opal since 1933. Opal has formed within a weathered, bleached profile at the interface of white, sandy claystone (Kopi) and underlying, grey brown montmorillonitic clay (Mud) near the...-
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Published: 01 Sep 1986
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RB 80/00038 Vesuvius opal diggings.
Small quantities were mined from 1977 to 1978. The opal infills joints in leached and weathered Cretaceous shale. Considerable potential exists for further small finds of opal.-
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Published: 01 May 1980
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RB 81/00017 Sarda Bluff, Ouldburra Hill and England Hill opal diggings.
These diggings have produced precious opal within weathered Cretaceous Marree Subgroup, infilling fractures in claystone, capped by ?Miocene silcrete. At Sarda Bluff and Ouldburra Hill opal with colour also cements coarse sandstone, some of which may...-
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Published: 01 Jan 1980
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RB 87/00031 Coober Pedy Opalfields. Geology of the precious stones field and results of the subsidised exploration program, 1981 (Volume 1).
Production 1978 - 1985 has averaged $25 000 000 per year. Mining is now mainly by mechanized methods in underground workings, most of the older shallower fields having been worked out. All areas of deeply weathered Bulldog Shale, or Russo Beds...-
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Published: 01 Jun 1987
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RB 83/00007 Coober Pedy Opalfields - Results of the subsidised exploration programme, 1981.
221 shafts were drilled. Precious opal or potch was found in 11 shafts and good sandstone prospective for opal in 34 shafts. A new field, Southern Cross, was established subsequent to the discovery of potch in subsidised shaft 85.-
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Published: 01 Mar 1983
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RB 78/00086 Andamooka Opalfields. A geological guide for the opal prospector.
During May - September 1978, 66 shafts were sunk under subsidised mining programmes to encourage testing of new areas. The new fields of Stans Hill and Yarloo West were established subsequent to the discovery of opal in Shafts 17 and 49.-
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Published: 01 Jan 1978
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RB 80/00103 Lambina opal diggings.
Small quantities of precious opal have been mined 1977-79. Opal and potch occur as opaline-silica cement within Cretaceous sandstone lenses, and as thin seams and fracture infillings within Cretaceous claystone, clasts and vein infillings within...-
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Published: 01 Jun 1980
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RB 88/00087 Coober Pedy Precious Stones Field - CRA Exploration Pty Ltd drilling, 1987.
3 diamond and 15 rotary-percussion holes were drilled in 1987 by CRA within EL 1330 on the southern part of the Field (PSF), this licence having been granted to the company for the exploration of strata below 50 metres depth in the subsurface. The...-
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Published: 01 Nov 1988
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Mabel Creek. Annual and final progress reports to licence expiry/full surrender for the period 3/12/1999 to 2/12/2003.
As part of an exploration project targeting possible large-scale opal occurrences hidden at depth beneath marine shale outcrops in the Stuart Range 'Breakaway' country, the subject licence was taken up to cover certain ground lying adjacent to the...-
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Published: 25 Jun 1903
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Mount Willoughby. Annual reports to licence expiry/full surrender for the period 11/1/2001 to 10/1/2005.
Exploration for opal, carried out in an area of the Stuart Range located approximately 130 km north-northwest of Coober Pedy, has included a compilation of geological and opal occurrence data, photogeological interpretation of aerial photographs,...-
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Ely Hill and Ant Hill. Combined and separate annual reports to licence expiry/full surrender for the period 10/1/1997 to 17/12/2004.
The subject adjacent licence areas, located approximately 55 km north-northeast of Coober Pedy, were the first tenements taken out for regional opal exploration under the provisions of the newly proclaimed South Australian Opal Mining Act 1997. The...-
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Published: 17 Dec 1904
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Abminga Diamond Project. Data release made at licence renewal [and project cessation]: progress reports and annual reports for the period 25/10/1993 to 17/3/2004.
The Abminga Diamond Project, undertaken by Caldera Resources NL, was granted exploration project status, including permission for EL joint reporting, in July 1996. This event followed up to two years of work by other operators on a number of...-
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Arckaringa Basin, SA. 1984 diamond exploration report.
Evaluation of the diamond potential of the Arckaringa area, 50 km south-west of Oodnadatta, which is here considered to be a region both tectonically and geologically favourable for the past emplacement of kimberlitic intrusive bodies, has comprised...-
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Apatite fission track analysis of samples from the western Eromanga Basin and Eringa Trough, Australia.
16 rock samples from wells and outcrop in the western Eromanga Basin / Eringa Trough region were analysed for their apatite grain fission track properties to derive an interpretation of the geothermal history of the enclosing strata.-
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Apatite fission track analysis of samples from Eringa Trough and western Eromanga Basin, Australia.
17 rock samples from 5 wells in the western Eromanga Basin / Eringa Trough region were analysed for their apatite grain fission track properties to derive an interpretation of the geothermal history of the enclosing strata.-
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Thermal history reconstruction in Cooper-Eromanga Basin wells using apatite and zircon fission track analysis and vitrinite reflectance.
Results of a study aimed at providing a better thermal history framework for understanding the post-Palaeozoic thermal evolution of parts of the Cooper-Eromanga Basin, South Australia, based on apatite fission track analysis, zircon fission track...-
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RI 056 Geology of the Coober Pedy Precious Stones Field Results of Investigations, 1981-86
The Coober Pedy Opal Fields, since their discovery in 1915, have been the largest producer of precious opal in the world, with the estimated value of production over the period 1978-86 averaging $25 million per year. Mining is now done mainly by...-
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RI 051 Andamooka Opal Fields The Geology of the Precious Stones Field and The Results of the Subsidised Mining Program
Since discovery of the opal field in 1930, Andamooka, 640 km by road north of Adelaide, has been a major world producer of precious opal. All workable opal at Andamooka has been found in the Marree Formation, a sequence of marine sediments of...-
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