-
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...-
Document
Published: 30 Apr 1965
-
RB 44/00108 Letter to the Senior Warden re. ways of resolving issues with legal compliance of precious stones claim working practices currently being followed on the Andamooka Opalfield.
There is no abstract created for this record-
Document
Published: 27 Jun 1957
-
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.-
Document
Published: 01 May 1980
-
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...-
Document
Published: 01 Sep 1986
-
RB 86/00069 Precious opal and the weathered profile at Coober Pedy.
The Coober Pedy Precious Stones Field is the largest producer of precious opal in the world. The opal is the product of weathering processes and is localised within the weathered profile. It occurs in early Cretaceous marine claystone of the Bulldog...-
Document
Published: 01 Nov 1986
-
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.-
Document
Published: 01 May 1980
-
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...-
Document
Published: 01 Jan 1980
-
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...-
Document
Published: 01 Jun 1987
-
RB 84/00047 Origin and formation of matrix opal from Andamooka, South Australia.
Two specimens were probably formed by partial dissolution of Andamooka Limestone erratics within Cretaceous marine sandy clay, followed by replacement of the remaining carbonate rock by fine grained silica together with growth and deposition of silica...-
Document
Published: 01 Jul 1984
-
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.-
Document
Published: 01 Mar 1983
-
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.-
Document
Published: 01 Jan 1978
-
RB 80/00104 Discovery of Early Cretaceous sediments at Mintabie Opalfield.
This note records the discovery of previously unrecognised Early Cretaceous fossiliferous sediments unconformably overlying Palaeozoic rocks at the Mintabie opal field. Following renewed mining activity at Mintabie in 1977-78, the Mineral Resources...-
Document
Published: 01 Sep 1980
-
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...-
Document
Published: 01 Jun 1980
-
RB 91/00084 Mineral occurrences of the KINGOONYA 1:250 000 map sheet area.
There is no abstract created for this record-
Document
Published: 01 Sep 1991
-
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...-
Document
Published: 01 Nov 1988
-
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,...-
Document
-
Ouldburra Hill. First annual and final report for the period 25/6/2002 to 24/6/2003.
A small area of opal workings examined near Ouldburra Hill, 35 km south-east of Marla, was thought to indicate local potential for finding and developing larger scale deposits. Research and review of available historic data showed that the area holds...-
Document
-
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...-
Document
-
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...-
Document
-
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.-
Document
