• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1588
  • 1105
  • 167
  • 89
  • 88
  • 66
  • 50
  • 47
  • 39
  • 25
  • 25
  • 25
  • 25
  • 25
  • 24
  • Tagged with
  • 3762
  • 584
  • 507
  • 400
  • 324
  • 319
  • 282
  • 272
  • 270
  • 255
  • 245
  • 234
  • 227
  • 216
  • 181
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
111

Palaeolatitudinal controls of Phanerozoic sediment-hosted mineral deposits

Grainger, Susan Elizabeth January 1987 (has links)
The distribution of Phanerozoic sediment-hosted mineral deposits appears to be influenced by latitudinal zoning. The palaeolatitudes of the host rocks were determined using standard palaeomagnetic procedures - the most reliable results being for the Mesozoic and Cenozoic with early Palaeozoic palaeolatitudes least reliable. The palaeolatitudes derived from Tarling and BP palaeogeographic reconstructions are in general agreement i. e. +/- 10°, although greater discrepancies occur for India and Central America. It is shown that some types (e. g. sandstone copper, sandstone lead) have a preference for low latitude arid regions whilst conditions in the equatorial and temperate rainfall belts were more favourable to the formation of other deposits (e. g. sandstone uranium-vanadium, oolitic ironstone). Using climatic modelling assuming uniformitarianism of the principles governing the Earth's atmospheric and oceanic circulation patterns, the climatic conditions affecting the distributions of sediment-hosted deposits were evaluated. It is concluded that local climatic effects are influential in the genesis of limestone base-metal, oolitic ironstone, sandstone copper, sandstone lead, shale base-metal, sedimentary exhalative, sandstone uranium-vanadium, manganese, laterite and phosphate deposits. These climatic conditions affect the nature and degree of chemical weathering, erosion, abundance of organic matter, ground water chemistry and volume in a particular region. However in some instances, such as placer deposits, the major control on deposit distribution was the availability and distribution of source rocks. Such palaeolatitudinal/palaeoclimatic control on the distribution of some deposit types places genetic constraints upon their formation. It also has obvious implications in the evaluation of potential sites for exploration and development.
112

Simulation of a proposed grinding circuit change to reduce Pb sliming

Ramirez-Castro, Javier January 1978 (has links)
No description available.
113

The role of minerals in the economic development of China, 1949-2000

Dorian, James P January 1987 (has links)
Typescript. / Bibliography: leaves 246-253. / Photocopy. / Microfilm. / xvi, 253 leaves, bound ill. 29 cm
114

Studies in the mineral metabolism of the Hawaiian crab, Podophthalmus vigil (Fab.) throughout the ecdysis cycle

Sather, Bryant Thomas January 1965 (has links)
Typescript. / Thesis (Ph. D.)--University of Hawaii, 1965. / Bibliography: leaves 138-147. / vii, 147 l mounted illus., tables
115

Using the floatability characterisation test rig for industrial flotation plant design

Coleman, R. G. Unknown Date (has links)
No description available.
116

Three dimensional modelling of ore-bodies using intergraph CAD/CAM system

Narain, Ashok A. January 1984 (has links)
Thesis (M.S.)--Ohio University, November, 1984. / Title from PDF t.p.
117

Computer aided underground mine design and drafting package

Fountaine, ELise V. January 1988 (has links)
Thesis (M.S.)--Ohio University, November, 1988. / Title from PDF t.p.
118

The geology and mineralization of the Mount Grainger Goldfield.

Wright, R.G. January 1966 (has links) (PDF)
Thesis (B.Sc.(Hons))--University of Adelaide, Department of Economic Geology,1966.
119

The paragenesis and origin of the Tennant Creek mineral deposits /

Whittle, Alick William Green. January 1966 (has links) (PDF)
Thesis (Ph.D.)--University of Adelaide, Dept. of Economic Geology, 1966. / Typescript.
120

Metallurgical operations of pyritic smelting as carried on at Ducktown, Tennessee

Snyder, Byron John. January 1910 (has links) (PDF)
Thesis--University of Missouri, School of Mines and Metallurgy, 1910. / The entire thesis text is included in file. Typescript. Illustrated by author. Title from title screen of thesis/dissertation PDF file (viewed March 19, 2009)

Page generated in 0.0485 seconds