太平间
发表于 2025-3-21 19:15:33
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nettle
发表于 2025-3-21 21:14:50
Manganese,e. They often occur together in the same mineral or in closely intergrown mineral aggregates giving a continuous series of net oxidation states. The geochemical properties of manganese are similar to those of iron, so that its segregation into economic deposits is largely a problem of separating it from iron.
裂缝
发表于 2025-3-22 01:38:45
Book 1983hemical processes are drawn from the study of ore deposits. Consequently, we initiated a course at The University of Cincinnati entitled "Sedimentary Ore Deposits," which serves as the final quarter course for both our sedimentary petrology and our ore deposits sequence, and this book is based on th
inveigh
发表于 2025-3-22 06:15:59
Copper and Silver,lso be considered in this chapter. Also discussed are supergene deposits of copper and silver. Although of diminished economic importance today, they serve to illustrate the geochemical processes involved in ore-formation without some of the uncertainties associated with interpretations of the genesis of the larger deposits.
Bombast
发表于 2025-3-22 11:29:24
Lead and Zinc,t least partly syngenetic. Shale-hosted orebodies can be exceptionally large, and are perhaps the most popular exploration targets among sedimentary ores at the present time. A transitional form between these two, one that is accordingly given considerable attention, is syngenetic ore in carbonate rocks, such as at Tynagh, in Ireland.
垫子
发表于 2025-3-22 16:11:52
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垫子
发表于 2025-3-22 18:00:50
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Mangle
发表于 2025-3-22 21:40:42
Aluminum and Nickel,two elements in the crust. Deep weathering under humid tropical conditions is necessary for the formation of both ore types, and aluminum ores are widely distributed in parts of the world having such climates now, or in the Tertiary, but production of lateritic Ni is largely confined to New Caledonia, the Dominican Republic, and Cuba.
curriculum
发表于 2025-3-23 05:15:05
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Abnormal
发表于 2025-3-23 08:52:26
for many chemical processes are drawn from the study of ore deposits. Consequently, we initiated a course at The University of Cincinnati entitled "Sedimentary Ore Deposits," which serves as the final quarter course for both our sedimentary petrology and our ore deposits sequence, and this book is b