Abstract

The prospecting work carried out by Pacific Island Mines Limited under Exclusive Prospecting Licence One (Papua) on Misima Island was inspected in February, 1961. The company is carrying out a programme of long shallow costeaning supplemented by shorter deeper costeaning to discover and open MD gold bearing quartz-manganese lodes in these areas. An adit has been driven on one of the lodes found by the deeper costeaning and a plant capable of treating fifty tons a day has been installed. Most of the lode material opened up by the work done by the company occurs as lenses in a flat-lying shear zone in porphyry. The porphyry is intermediate and intrudes schist. The shear zone has been opened up over a width of eighty feet at right angles to the schist contact. A smaller lode (the one opened up by the adit) occurs in a sheared porphyry dyke intruded along the contact between two of the rock units recognised by de Keyser (1960) in the schists, namely the Ara Greenschist and the Umuna Schist. Other small lodes occur in the schist. The grade of the lode determined by panning and visual estimation, appears to be four to six pennyweights of gold per ton. The lode-bearing shear zone has been opened up over an outcrop distance of more than 2500 feet. Other lodes are known outside the present area of detailed costeaning, but none of these has been opened up. Further work is needed in the area of detailed coslteaning to obtain an accurate grade of the lode material; to discover the dimensions of the lenses already found; to prove down-dip and along-strike extensions of the lode-bearing shear zone, and to determine its thickness. Work is also needed to investigate the lodes known to exist outside the areas of detailed costeaning and to prospect the rest of the Exclusive Prospecting Licence Area.
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Product Type/Sub Type

nonGeographicDataset

Constraints

Creative Commons Attribution 4.0 International Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

1961-01-01T00:00:00

Product Type

nonGeographicDataset

Topic Category

geoscientificInformation

GA Catalogue Number

10798 Product http://www.ga.gov.au/metadata-gateway/metadata/record/10798/

Keywords

GA Publication
Record
geology
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Digital Transfer Options

onLine

Distributor

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

Metadata File Identifier

a05f7892-7dc3-7506-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 SECURITY CLASSIFICATION

unclassified

Metadata Contact

Role
pointOfContact
Organisation Name
Commonwealth of Australia (Geoscience Australia)
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address
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