The Elements of economic geology

Bibliographic data

Monograph

Identifikator:: 1773832379

URN:: urn:nbn:de:zbw-retromon-172798

Document type:: Monograph

Author:: Gregory, John W. http://d-nb.info/gnd/11683014X

Title:: The Elements of economic geology

Place of publication:: London

Publisher:: Methuen

Year of publication:: 1928

Scope:: XIV, 312 S.; graph. Darst.

Digitisation:: 2021

Collection:: Economics Books

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Index

Document type:: Monograph

Structure type:: Index

Title:: Subject index

Collection:: Economics Books

310 THE ELEMENTS OF ECONOMIC GEOLOGY Mercury, ores of, 119-2 5; Almaden, 120-1; association of ores with Kainozoic mountain movements, 123-5; California, 123; China, 123 ; Idria, 121-3; price, 120; qualities, 119; in sinters, 21. Metal, definition of, 3; source of, 7. Micas, 157-60 ; age, 157 ; distribu- tion and uses, 15% ; mining econo: mics, 159-60; phlogopite, 158 Pneumatolytic origin, 1 57; price, 160. Mineral, definition of and mineral species, 2-3. Mineral fuels, 259-96, Mineral oil, 274-96. Monazite, 161, Moss mining, 39. Mother lode of California, 38, Mud volcanoes and oil, 281, Mulch, effect of, 195. Mullock, 12. NEPHRITE, 166. Nickel, price and uses, 113. Ores of, 113-9; Africa, South, 119; Gap Mine, 118; New Caledonia, 118; of S.W. Scotland, 119; Sudbury Field—genesis of the ores, 114-8, Nitrates, 197-200; formation, theories of, 198-9 ; reserves, esti- mates of, 199-200. Nugget formation, 29-40. 69. Oi, 274-96; age of, 278; anti clinal theory founded by Sterry Hunt, 284; Baumé scale, 276 bitumen veins, 280; brea, 280, 282, 289; indications of, 280-3 ; isovols, 281 ; mud volcanoes and, 281; origin of, 278-80 ; petro leum, 274-94; pitch lakes, 280, 290; pyrobitumen, 294; re sources, estimation of, 285-6; supply of, 276-7. Dilfields, essential structures, 283 Appalachian, 286-7 ; Argentine, 292; Burma, 293; Californian, 288; Canadian, 290; Caucasus, 293 ; Eastern Archipelago, 294 : European, 292-3 ; Mexican, 289 ; Mid Continental, U.S.A., 287; Persia and Mesopotamia, 293 ; Peruvian, 29; Rocky Mountain 288; South American, 291; West Indian, 290-1. Oil-pools, 292-3, Oil shale, 294-6 ; Scottish, 29. Olivine, 167. Opal, 167. Ore, definition of, 3; formation of, 14-16; formation, 27-9; depth of, see Depth. Ore formation in relation to igneous rocks, 17-19. Ore-grade, 3; history and study of, 14-16; igneous, 26; mag- matic, 23-6; microscopic study of, 32; sequence in depth, 20-2, 27-30; sporadic distribution of, 4. Ore-zone, the, 17-20. PANAMA breaks, 179, Peat, 261. Pegmatites and ores, 23, 44, 77, 166. Percolation wells, 229. Peridote, 167, Petroleum, 274-94; history and nature, 274; physical classifica- tion, 275. Phosphates, 32-3, 200-5; apatite, 200-1; coprolites, 203; forma: tion of phosphates, 201; granu- lar phosphates, 204 ; guano, 201-3 ; lagoon phosphate, 203; phosphatic chalk, 204 ; phospha- tized volcanic rock, 203; rock phosphate, 202; staffelite, 203 ; supply of, 205; value and use of, 200. Placers, 32, 37, 53, 63-4, 147. Pipe lodes, 9, 64, 81, 83, 83. Pitch lakes, 280, 290. Platinum, price and qualities, 65. Ores of, 65-70; age of, 69 ; British Columbia, in, 68 ; Africa, South, 67; Russia, 66-7; dis- tribution, 65; genesis, 68-70. Pneumatolysis, 26, 36, 37, 41, 43-4, 71, 73, 76, 77, 79, 81, 82-3, 97, 162, 164, 166, 169-73. Potash salts, 214-7; derivation from sea-water, 214: distribu-

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