The relation between gold, fineness and conditions of deposition : with special reference to the Morobe goldfield, New Guinea

Fisher, Norman Henry (1941). The relation between gold, fineness and conditions of deposition : with special reference to the Morobe goldfield, New Guinea Professional Doctorate, School of Physical Sciences, The University of Queensland.

       
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Author Fisher, Norman Henry
Thesis Title The relation between gold, fineness and conditions of deposition : with special reference to the Morobe goldfield, New Guinea
School, Centre or Institute School of Physical Sciences
Institution The University of Queensland
Publication date 1941
Thesis type Professional Doctorate
Supervisor Unknown
Total pages 115
Language eng
Subjects L
260106 Ore Deposit Petrology
260100 Geology
Formatted abstract

OUTLINE OF THE SUBJECT  

It is impossible for anyone acquainted with the geology of the Morobe Goldfield District of the Mandated Territory of New Guinea not to be impressed by the manner in which  the fineness of the gold varies in different parts of the field . As nearly all the gold output is derived from alluvial operations and the workingsare spread almost over the whole system of streams compromising the Bulolo and Watut River valleys, as well as adjacent areas, a very complete record is obtainable of the distribution of gold of different grades. The very completeness of this record was largely responsible for the present attempt to correlate and the sheds of various types of gold with geological features and to discover the determining factors governing gold fineness on the Morobe field. The facts relating to gold fineness in other gold bearing districts are then investigated to discover whether the principles established for the Morobe goldfield are generally applicable. Comparisons are made of goldbearing areas of various types in other parts of the world and the distribution of gold fineness in relation to conditions of ore deposition examined.

In the light of the conclusions arrived at the probable causes governing gold fineness are discussed, explanations are sought for outstanding anomalies, and applications of the subject to various problems and to practical prospecting are indicated. Consideration is given in the appropriate places to the question of the refinement of gold by stream action or by lying long immersed in placers, also to the effects on gold fineness of removal from the original outcrop, and variations within lodes due to secondary enrichment and redeposition of the gold.  

Keyword Gold assaying
Gold ores -- Papua New Guinea -- Morobe

Document type: Thesis
Collection: Professional Doctorates - UQ staff and students only
 
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Created: Wed, 18 Jun 2014, 13:17:09 EST by Nicole Rayner on behalf of Scholarly Communication and Digitisation Service