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The Muruntau gold deposit in the Kyzylkum desert of Uzbekistan is the largest single deposit ( 1100 tonnes of gold) of the class of low-sulfide syndeformation/synigenous gold deposits formed in the brittle/ductile transition zone of the... more
The Muruntau gold deposit in the Kyzylkum desert of Uzbekistan is the largest single deposit ( 1100 tonnes of gold) of the class of low-sulfide syndeformation/synigenous gold deposits formed in the brittle/ductile transition zone of the crust within transpressional shear zones. Hosted ...
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Mineral-deposit models are the basis for consistent resource-assessment, exploration, and environmental risk analysis methodologies. To reduce uncertainties in these methodologies, improved predictability of deposit occurrence is... more
Mineral-deposit models are the basis for consistent resource-assessment, exploration, and environmental risk analysis methodologies. To reduce uncertainties in these methodologies, improved predictability of deposit occurrence is essential. Advances in understanding about structure and tectonics and the geology of earthquakes, together with improved insights as to how fluid flow is coupled with active deformation, heat transport, and solute transport, provide the
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The application of the tectonic model for the porphyry copper/polymetallic vein kin-deposit system, proposed by the authors and used to assess the undiscovered metallic mineral resources of northern Hungary, is illustrated here for the... more
The application of the tectonic model for the porphyry copper/polymetallic vein kin-deposit system, proposed by the authors and used to assess the undiscovered metallic mineral resources of northern Hungary, is illustrated here for the Matra Mountains, northern Hungary. This model is based on the evolution of strain features (duplexes and flower structures) developed in the strike-slip fault systems in continental
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The Muruntau gold deposit in the Kyzylkum desert of Uzbekistan is the largest single deposit ( 1100 tonnes of gold) of the class of low-sulfide syndeformation/synigenous gold deposits formed in the brittle/ductile transition zone of the... more
The Muruntau gold deposit in the Kyzylkum desert of Uzbekistan is the largest single deposit ( 1100 tonnes of gold) of the class of low-sulfide syndeformation/synigenous gold deposits formed in the brittle/ductile transition zone of the crust within transpressional shear zones. Hosted ...
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Research Interests: Geochemistry, Mineralogy, Density, Depositional Environment, Weathering, and 16 moreApplied Geochemistry, Concentration, Correlation, South Carolina, Regression, Ground Water, Transgression, Soils, Sol, Grain size, Aquifers, Heavy Minerals, Coastal Plain, Indexation, Sedimentary Rocks, and ENVIRONMENTAL SCIENCE AND MANAGEMENT
Research Interests: Geology()
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A detailed understanding of the processes that led to empirical oil and gas field size distributions, especially the dynamic character of the discovery process, is needed to improve the quality of forecasts of oil and gas resources. An... more
A detailed understanding of the processes that led to empirical oil and gas field size distributions, especially the dynamic character of the discovery process, is needed to improve the quality of forecasts of oil and gas resources. An empirical distribution results from a complex interaction of economic, technical, and social factors with geology in the form of a distribution of
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Soils collected in 2004 along two North American continental-scale transects were subjected to geochemical and mineralogical analyses. In previous interpretations of these analyses, data were expressed in weight percent and parts per... more
Soils collected in 2004 along two North American continental-scale transects were subjected to geochemical and mineralogical analyses. In previous interpretations of these analyses, data were expressed in weight percent and parts per million, and thus were subject to the effect of the constant-sum phenomenon. In a new approach to the data, this effect was removed by using centered log-ratio transformations to 'open' the mineralogical and geochemical arrays. Multivariate analyses, including principal component and linear discriminant analyses, of the centered log-ratio data reveal the effects of soil-forming processes, including soil parent material, weathering, and soil age, at the continental-scale of the data arrays that were not readily apparent in the more conventionally presented data. Linear discriminant analysis of the data arrays indicates that the majority of the soil samples collected along the transects can be more successfully classified with Level 1 ecological regional-scale classification by the soil geochemistry than soil mineralogy. A primary objective of this study is to discover and describe, in a parsimonious way, geochemical processes that are both independent and inter-dependent and manifested through compositional data including estimates of the elements and corresponding mineralogy.
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Research Interests: Criminal Law, Constitutional Law, International Law, Blindness, Developing Countries, and 23 moreTreatment Outcome, Public Health, Disease Outbreaks, South Africa, Tuberculosis, Humans, Program Development, Developing Country, Diabetic Retinopathy, Cytomegalovirus, Resource Limitation, Developing World, Hiv Infection, Age related macular degeneration, Highly Active Antiretroviral Therapy, Drug Costs, World Health Organization, Cytomegalovirus retinitis, Antiviral Agents, Acquired immunodeficiency syndrome, Developing Regions, Ophthalmoscopy, and Ganciclovir(Treatment Outcome, Public Health, Disease Outbreaks, South Africa, Tuberculosis, Humans, Program Development, Developing Country, Diabetic Retinopathy, Cytomegalovirus, Resource Limitation, Developing World, Hiv Infection, Age related macular degeneration, Highly Active Antiretroviral Therapy, Drug Costs, World Health Organization, Cytomegalovirus retinitis, Antiviral Agents, Acquired immunodeficiency syndrome, Developing Regions, Ophthalmoscopy, and Ganciclovir)
(Treatment Outcome, Public Health, Disease Outbreaks, South Africa, Tuberculosis, Humans, Program Development, Developing Country, Diabetic Retinopathy, Cytomegalovirus, Resource Limitation, Developing World, Hiv Infection, Age related macular degeneration, Highly Active Antiretroviral Therapy, Drug Costs, World Health Organization, Cytomegalovirus retinitis, Antiviral Agents, Acquired immunodeficiency syndrome, Developing Regions, Ophthalmoscopy, and Ganciclovir)
Zipf’s Law originally was proposed as a guide to a statistical distribution in social studies. The law describes a relationship between size and rank of discrete phenomena. It is a variant of Pareto’s 1927 Law known as the 80/20 rule and... more
Zipf’s Law originally was proposed as a guide to a statistical distribution in social studies. The law describes a relationship between size and rank of discrete phenomena. It is a variant of Pareto’s 1927 Law known as the 80/20 rule and is similar to Bode’s Law in concept. The relationship described by Zipf’s Law is a succession of order data with the largest followed by half the size for the next largest, which in turn, the next is half that size, and so on. In geology, it has been used with moderate success in resource assessment of mining and petroleum. In essence, it predicts how many entities of a certain size may be left in a sequence of decreasing size assuming the largest has been ascertained. Examples of applications would be plotting the rank and size of ore deposits or oil fields to determine how many deposits remained undiscovered and their size. After a flurry of papers in the 1970s and 1980s, application of the law apparently either was successful and thus not reported in way the literature or was determined to be ineffectual and its use discontinued, but either way the law lapsed into obscurity. Examples of oil- and gas-field size in Kansas, the occurrence of historic earthquakes that affected the state, and size of anticlines (plains-type folds) are presented to illustrate application and limits of Zipf’s Law.
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A computer methodology is presented that allows natural aggregate producers, local governmental, and nongovernmental planners to define specific locations that may have sand and gravel deposits meeting user-specified minimum size,... more
A computer methodology is presented that allows natural aggregate producers, local governmental, and nongovernmental planners to define specific locations that may have sand and gravel deposits meeting user-specified minimum size, thickness, and geographic and geologic criteria, in areas where the surficial geology has been mapped. As an example, the surficial geologic map of the South Merrimack quadrangle was digitized and
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... Complex Exploration and Discovery Histories Lawrence J. Drew m and John H. Schuenemeyer I Received November 15, 1996; accepted April 15, 1997 ... Ecuador San Jorge-Sinu 23 400 (Many very recent discoveries) Peru-Ecuador Talara... more
... Complex Exploration and Discovery Histories Lawrence J. Drew m and John H. Schuenemeyer I Received November 15, 1996; accepted April 15, 1997 ... Ecuador San Jorge-Sinu 23 400 (Many very recent discoveries) Peru-Ecuador Talara Progreso-Nuto 29 508 NA 179.0 ...