Geochemical prospecting (or exploration) methods for petroleum and natural gas deposits at and near the surface of the ground and the offshore area have not achieved the popularity of geophysical methods. Geochemical methods have been used widely in both the united states and the soviet union, and many new discoveries have been reposrted from these …
Macerals are the microscopically recognizable individual constituents of coal and depending on their quantitative participation and their association, they control the chemical, physical and technological properties of a coal of a given rank. In this new classification (ICCP system 1994) the maceral group has been revised from its previous classific…
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…
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…
Preliminary studies have shown that a petrochemical project for the manufacture of ethylene and selected ethylene derivatives using an ethane feedstock extracted from natural gas to be produced from the Arun field would b…
This report covers my activities from August 2 to November 5,1972, in geochemical exploration as a part of the U. S. Geological Survey (USGS) program in cooperation with the Geological Survey of Indonesia (GS!) sponsored by the Government of Indonesia and the Agency for International Development (AID) under Participating Agency• Agreelll…
One of the most important aspects of the interpretation of geochemical data is the choice ofanomaleus values from among these data. Disticuvely anomalous values are readily diseriminated, because they are characterized by statistical methods. Applications of these methods are described in the present paper.
During the last few decades coal chemistry and coal petrology have developed as special fields of research, of equal importance from both the scientific and practical viewpoints. Until the nineteen twenties coal chemists used to examine coal as a whole. However, after coal petrographers had. discovered tha…
A biorefinery is facility that integrates biomass conversion processes and equipment to produce fuels, power, and value-added chemicals from biomass. The biorefinery concept is analogous to today's crude oil refineries, which produce multiple fuels and products ftom petroleum. The goal in biorefining is to isolate all the added value from the biomas…