Citation

Owen, H.B., 1953. Bauxite in the Wessel Islands, Arnhem Land, Northern Territory of Australia. Record  1953/039. Bureau of Mineral Resources, Geology and Geophysics, Canberra.

Abstract

Pisolitic bauxite containing between 40 and 50 per cent available alumina was discovered on islands off the north-east coast of Arnhem Land in 1949, and after preliminary reconnaissance in 1951 a thorough exploration of the deposits on Marchinbar Island, Wessel group was undertaken by the Australian Aluminium Production Commission. The island is composed of a gently titled alternating sequence of sandstone, siltstone and shale of upper Proterozoic age bearing remnants of a lateritized surface which includes the bauxite occurrences. Bauxite has developed by lateritization of a sericite-quartz siltstone containing rather more than 50 per cent sericite. The rock contains 65 per cent total silica, 19 per cent alumina and 6 per cent potash. Economic bauxite is mainly confined to the Pisolitic zone which has a maximum depth of 16.5 feet and rests upon red or red and black tubular and massive laterite. Over limited areas high alumina values persist downwards into the red tubular zone for a few feet. The deposits were proved by sampling pits sunk at intersections of rectangular grids spaced at 400 feet by 200 feet, except for one deposit (Fox), which was tested on a wider scale. Proved reserves are given in the following table, but the figures for Fox deposits are of a lower order of accuracy and should be regarded as indicated reserves. [See record for full details]. The total is equivalent to 4,500,000 tons of available alumina or 2,380,000 tons of aluminium metal.
Google map showing geographic bounding box with values North bound -10.5 East bound 137.0 West bound 135.5 South bound -12.5
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Product Type/Sub Type

dataset - GA Publication - Record

Constraints

license
Creative Commons Attribution 3.0 Australia Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

1953

Product Type

dataset

Topic Category

geoscientificInformation

Keywords

GA Publication
Record
resource assessment
geology
mineral deposits
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Geographic Extent

North bound
-10.5
East bound
137.0
West bound
135.5
South bound
-12.5

Lineage

Legacy product, lineage not available

Digital Transfer Options

onLine

DISTRIBUTION Format

pdf

Distributor

Role
distributor
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address

Metadata File Identifier

a05f7892-8095-7506-e044-00144fdd4fa6

Metadata Standard Name

ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata

Metadata Standard Version

1.1

Metadata Date Stamp

1996-10-30

METADATA SECURITY CLASSIFICATION

unclassified

Metadata Contact

Role
pointOfContact
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address
Downloads
For information on acquiring this product,
please contact the Geoscience Australia Sales Centre via:

fax:
+61 2 6249 9960; or
phone:
1800 800 173 (within Australia);
 
+61 2 6249 9966 (outside Australia).

Please note that support hours are 9 am to 5 pm weekdays