As Pointed out by Boyle (1974) in his comprehensivecoverage of element associations of mineral deposits, rarely does a single element concentrate in the Earth's crust• to form a mineral deposit. Generally mineral deposits consist of a suite of elements which have been concentrated because of certain intrinsic chemical properties which depend esse…
Experimental simulation of Colorado Plateau type uranium deposits is di- vided into seven parts. The first three summarize the essential features of geological occurrence for the ores. Details are omitted since they are avail- able in other reports to which reference is made. The last four parts out- line the results …
Recent developments in the Australian industrial minerals sector are discussed. Mineral exports are a large component of Australia's foreign trade, these comprising (in decreasing value) coal, alumina, gold, iron, ore, diamond and mineral sands. Major imports are potassium fertilizer, sulphur and phosphate rock.
Although diamonds can occur in aTluvial gravels and beach sands, their only primary source is kimberlite. Approximately 88 per• cent of the world's diamond production comes from the primary source, so it is important to understand the tectonic controls of kimberlite emplacement. Any tectonic model proposed has to take cognisance of the empirical…
In the Jiwo Hills area Tertiary strata ranging in age from Middle.Eocene lie upon outcropping pre-t~rtiary metamorphic base~ent. A well exposed sequence ranging up to Middle Miocene was studieq and a good stratigraphic subdivision obtained, mainly by utilising the planktonic fo:raminifera. An Eocene sedimentary sequence of late Ta (early-middle …
Perlite is a glassy yolcanic rock which will upon Tap id and controlled heating, expand or ''pop" into a frothy aterial of low bulk density -valued as a lightweight aggregate. Occurrences and commercial deposits of perli te are iknown throughout the world as well~exposed flows and domes of Tertiary and Quaternary age like most of the -volcanic …
Published multi-element stream-sediment exploration geochemical data from new brunswick are used to illustrate some pitfalls of correlation and regression. Large matrics of correlation coefficients. are easly mass-produced.These coefficient are susceptible to suprious values, clustering of samples and the effect of other variables on the relation un…
Fundamental questions of metallogenetic investigations are first donsidered. The difference betwen factors and indicators in metallogenetic analysis is discuss.Metallogenetic factors are geological phenomena which condition the formation of deposits.They are its cause.