 | | Journal (issue) |
| green inclusions: amphibole • black inclusions: spinel Microscopic observations The crystals forming the...chromiumbearing spinel, plagioclase and chromium-bearing mica (fuchsite); • in the ruby occurrence of Fiskenässet...rubybearing zoisite-amphibolite from Longido, Tanzania, pargasitic amphiboles are found in association...anorthite and magnesium-iron-aluminium-chromium spinel (picotite). Amphibole analyses quoted by Leake...amphiboles were found in a corundum- and spinel-bearing marble from Pakistan (exact locality not given |
 | | Journal (article/letter/editorial) |
| METACARBONATE-HOSTED SPINEL ON BAFFIN ISLAND, NUNAVUT, CANADA: INSIGHTS INTO THE ORIGIN OF GEM SPINEL AND COBALT-BLUE...COBALT-BLUE SPINEL PHILIPPE M. BELLEY§ AND LEE A. GROAT Department of Earth, Ocean and Atmospheric Sciences...Columbia, Canada V6T 1Z4 ABSTRACT Samples from 14 spinel occurrences in the Lake Harbour Group (LHG), Baffin...geochronology. Spinel at most occurrences is blue to violet and generally not of gem quality. Two spinel occurrences...blue, cobalt-enriched (0.03–0.07 wt.% CoO) spinel. The spinel mostly occurs in metasedimentary (sensu stricto) |
 | | Journal (issue) |
| 142 Well-Formed Tsavorite Gem Crystals from Tanzania Robert E. Kane, A n t h o n y R. I...nickel (depending on the color desired) into a region that extends just below the surface of the otherwise...Payne (1937)and Webster (1983),and in natural blue spinel by Shigley and Stockton (1984).Therefore, we interpret...consistent with that of cobalt-doped synthetic blue spinel of similar color. Ultraviolet Fluorescence. The...permitted microprobe analysis of both the near-surface region affected by the diffusion treatment process, as |
 | | Book (edition) |
| dealing with mode of origin and localities of occurrence have been thoroughly revised. The genesis of...general description of the associa¬ tion and occurrence of the minerals which it contains is given. Statistics...general physical characters, together with their occurrence, associations, uses, etc., are included under...Arranged According to Elements .... 124 326 Occurrence and Association of Minerals Rocks and Rock-making...lines A-B and A-C, would be the more common in occurrence. Law of the Constancy of Interfacial Angles. |
 | | Book |
| 42 43 46 47 48 2.10.1 2.10.2 2.10.3 Perovskite Spinel group Pyrochlore and koppite Gamet group Pyrope...and common accessory ore mineral. Belongs to the spinel group. In volcanic rocks it tends to occur as titanomagnetite...skeletal forms and/or is altered to leucoxene. Occurrence: accessory mineral in most igneous rocks. It...clearly seen in altered than in fresh grains. Occurrence: it occurs together with magnetite as an accessory...very characteristic and different paragenesis. Occurrence: as a secondary mineral in igneous rocks (Fig |
 | Pascal, M.-L., Katona, I., Fonteilles, M., Verkaeren, J. (2005) RELICS OF HIGH-TEMPERATURE CLINOPYROXENE ON THE JOIN Di CaTs WITH UP TO 72 mol.% Ca(Al,Fe3+)AlSiO6 IN THE SKARNS OF CICLOVA AND MAGUREAUA VATEI, CARPATHIANS, ROMANIA. The Canadian Mineralogist, 43 (3) 857-881 doi:10.2113/gscanmin.43.3.857 | Journal (article/letter/editorial) |
| in calcite and in wollastonite very close to the marble contacts of two shallow monzodioritic intrusive...the intrusive margins, and by the (exceptional) occurrence of Na-rich melilite. Part of the intrusive boundaries...Ti-rich clinopyroxene associated with monticellite, spinel and either forsterite or åkermanite in the Kiglapait...(Pascal et al. 2001). Septa with Al-rich pyroxene, spinel, garnet, clintonite and vesuvianite occur in a...CaTs pyroxene was found are remarkable by the occurrence of rocks mainly composed of gehlenite-rich melilite |
 | | Journal (article/letter/editorial) |
| enstatite, magnesite, diopside, tremolite and spinel. Most of minerals show an euhedral habit, with...hand, it can be readily argued that the mode of occurrence, petrography and geochemistry of the Eppawala...appreciable quantities of apatite-bound chlorine and spinel posed problems for such an interpretation. Later...phlogopite, magnesite, enstatite, tremolite and spinel. Magnetite, ilmenite and pyrite contents are highly...tremolite and secondary carbonates is very common. A marble band lacking economic phosphate mineralisation |
 | | Report (volume) |
| biological and physical sciences of the Pacific region. University of Hawaii Press. Honolulu, Hawaii....of the marine NGegene formations of the Coalinga region, California: California Univ. Pubs. Geol. Sci....tables, 1969. 05262 Ahmad, N.; Jones, Robert L. Occurrence of aluminous lateritic soils (bauxites) in the...abs.], in A symposium on processes in the focal region-Internat. Union Geodesy and Geophysics, 14th Gen...Lands). Guidebook of northern Mexico, Sonoran Desert region - Internat. Conf. Arid Lands in Changing World |
 | | Report (issue) |
| barite occurrence Pakenham quarry Cedar Hill soapstone occurrence Galetta celestine occurrence Kingdon...Kingdon (Fitzroy, Galetta) mine Stanton lead occurrence Bell’s mine Calabogie area Bluff Point mine Calabogie...Renfrew–McArthurs Mills area Hunt mine Dacre iron occurrence Keyfortmore mine Radnor mine Sunset mine Spain...molybdenite mine Easton Minerals quarry Two Island marble quarry Ruby mine McCoy mine v 41 42 44 44 45...79 80 81 82 82 83 85 86 86 87 89 89 90 vi Mayo marble quarry Renfrew–Madawaska area Renfrew County Road |
 | | Book (edition) |
| objects or replacing fibers of wooden supports. Occurrence up to 3 cm (1 .1 The 8 finest crystals of...mineral, either in ciated with calcite or e Occurrence The finest dendritic and wirelike crystals come...deposits, formed at high hydrothermal conditions. Occurrence The main gold-bearing temperature under districts...that miners are literally showered as they work. Occurrence Occasionally found at Idria (Yugoslavia), Almaden...section (Widmanstatten pattern; see opposite). Occurrence Terrestrial native iron with a low nickel content |
 | | Report (issue) |
| cassiterite. from placer operations in the York region since 1902. In 1911 a dredge was installed on Buck...tin has also been recovered in the Yukon-Tanana region in the Hot Springs district, and a small production...Investigations of the tin deposits of the York region have been made by a number of Geological Survey...mining developments to detailed studies of the one occurrence. The most complete of these studies were made...the essential features covering the geologic occurrence of the Cassiterite. The following publications |
 | | Report (volume) |
| associated basic mag¬ nesian rocks. Shooting Creek region, Clay County, North Carolina. Elf dunite. Elf ...Microscopic characters. Gross structures . Modes of occurrence... Relations to the gneisses and schists. General...corundum. Chapter VII.—Modes of occurrence of corundum. Modes of occurrence in North Carolina. Corundum in...CONTENTS. Chapter VII.—Continued. pace Modes of occurrence in North Carolina.—Continued. Corundum in igneous.... 225 In crystalline limestone. 226 Modes of occurrence of corundum not found in America. 227 Chapter |
 | | Book (edition) |
| a general description of the association and occurrence of the minerals which etc., it contains is...general physical characters, together with their occurrence, associations, uses, etc., are included under...115 MINERALS ARRANGED ACCORDING TO ELEMENTS. OCCURRENCE AND ASSOCIATION OF MINERALS LISTS OF . Rocks...lines A-B and A-C, would be the more common in occurrence. include a greater or less MANUAL OF MINERALOGY...of their faces. Perhaps the one most common in occurrence has the parameter relations la, 2b, c, the |
 | | Report (issue) |
| Meules Cap aux Meules calcite occurrence Cap aux Meules gypsum occurrence Cap au Taureau occurrences Fatima...Baie du Sud occurrence Île du Havre aux Maisons Anse à Damase occurrence Butte Ronde occurrence Chemin des...Head Île de la Grande Entrée Boudreau Island occurrence 26 26 27 27 27 28 30 30 Cap-aux-Meules to Havre-Aubert...Collines de la Demoiselle Collines de la Demoiselle occurrence 31 31 33 33 33 34 Sandy Hook Dune Île du Havre...amethyst occurrence Middle Cove, Outer Cove occurrences Torbay quarry Bauline Road occurrence Quidi Vidi |
 | | Book (edition) |
| and general physical characters, together with occurrence, associations, and uses, are included in this...oneee we eer 131 243 254 266 A care 270 OccURRENCE AND ASSOCIATION OF MINERALS..............-eececeee0--...or the indices of a face of a trapezohedron. Occurrence of Isometric Forms of the HexocThe cube, octahedron...halite, sylvite, fluorite, cuprite. OcTAHEDRON: Spinel, magnetite, franklinite. DopEcAHEDRON: Magnetite...Octahedron Showing Plane of Twinning. Fria. 212. Spinel Twin. Common Twin Laws. Isometric system. In the |
 | | Book (edition) |
| the electrochemical series, of interest in the occurrence and metallurgical treatment of ores, and chemical...crystal-symmetry is inserted. The chapter on the occurrence of minerals has been partly rewritten to include...180 183 184 185 187 189 192 197 CHAPTER V. THE OCCURRENCE OF MINERALS The Classification of Rocks I. Igneous...one mineral only. For example, a pure statuary marble consists of the single mineral calcite. PART...chemical phenomena which are of importance in the occurrence and treatment of minerals. The more active metals |
 | | Report (issue) |
| the name of the mine, deposit, field, area, or occurrence being described. Synonyms and Other Names or...might also 5 include any specific mine or occurrence names that are known, i.e. "includes Northern...site has produced and when or if it is a mineral occurrence or showing. Host Rock Age and Host Rock contain...Asb asbestos Lst limestone Ba barite Mbl marble Bri brine Mg magnesium, magnesite Ca calcite...Nations, Atlas of Mineral Resources of the ESCAP Region, v. 12, 85 p. Jankovic, S., 1984, Strata-bound |
 | | Report (volume) |
| Mica, Monazite, IVtroleum, Ruby, Sapphire and Spinel, Salt, Saltpetre, Tin, Tungsten. Total values...gold : : : ; Graphite Iron. . — Mode of occurrence. — Production. Production . : Castings....industry : in Garhwal. Imports Jadeite. Ill occurrence. Leadf Silver .... : Value of jade. History...consumption. Distribution of mica exjiorted. Occurrence. Vses of mica. Mining B. Kodiirile methods...251 oil-j>roduc- Value of imports. Exports. Occurrence of Indian jHdroleum. Punjab and Baluchistan. |
 | | Book (edition) |
| Molyhdates 385 Silicates 389 371 6 . . . . OCCURRENCE AND ASSOCIATION OF MINERALS Rocks and Rock-Forming...in a garden has seen minerals in their natural occurrence. The rocks of the mountain, the sand on the beach...mineralogy are limited to materials of natural occurrence. Thus, steel, cement, plaster, and glass are...growt h if such irregularities are of common occurrence. Galena , for example, has a cubic habit , magnetite...or the indices of a face of a trapezohedron. Occurrence of isometric forms of the hexoctahedral class |
 | | Report (volume) |
| -------- -- -~ -- --- -- --- ---- -- Dolomite marble near Short Creek ___ - ---- - ___ ___ __________..._____ __ _________ ______ ____ Mineralization near Marble Creek __ ___ __ _______ _~ _ ___ __ _ ___ Stibnite-barite...which to base study of the ore deposits of t he region. The quadrangle conta ins fragmentary exposures...importance in the study of the ore deposits of the region are still lacking. The study of the Casto quadrangle...however, aid materially in descriptions of the region. RELIEF The Casto quadrangle is in one of the |
| | Book (edition) |
| the electrochemical series, of interest in the occurrence and metallurgical treatment of ores, and chemical...crystal-symmetry is inserted. The chapter on the occurrence of minerals has been partly rewritten to include...180 183 184 185 187 189 192 197 CHAPTER V. THE OCCURRENCE OF MINERALS The Classification of Rocks I. Igneous...one mineral only. For example, a pure statuary marble consists of the single mineral calcite. PART...chemical phenomena which are of importance in the occurrence and treatment of minerals. The more active metals |
 | | Report (volume) |
| Monazitc, Nickrd, JV.troJeiim, Kuby, , . Sapphire and Spinel, Salt, Saltj^etre, Tin, Tungsten Total values...gold: Salem. — Assam. ........ .... —Mode of occurrence. Production llmciute —Travancore production.... Prices. Value of jade. Composition. Mode of occurrence. .140 History of the jhdeite trade Lead. —Bawdwin... Gondile Gioup. Nagpur-Balaghat area mode of occurrence. : crystalline limestones. tial B. —The ...Arakan coast Burma. Kashmii. Rnby, Sapphire and Spinel. Production. Salt. ^Production. Sources of Indian |
 | | Report (issue) |
| __ .................... __ .... _ 157 Mode of occurrence ........ _.. _......... _........... _.........mountains .. ___ 28 A, Wash apron, Lone Mountain region; B, Layering of subaerial wash, edge of wash apron... _. ___ .. ____ .. ____ . _____ .. _. ___ .. Occurrence of ore in Great Gulch mine _. ______________..._ ... ___ . _.. _ . __ .. Formation of dolomite marble by mineralizing solutions, Enterprise ore zone... This belt runs northwest and southeast in the region lying immediately east of the Sierra Nevada, and |
 | | Book (edition) |
| east and west of the Central Witwatersrand outcrop region took place. After the extension of the deposits...Fuller's arth sce. fects vies arse aks te tes + Marble weetre pecs cite es sac eeomioneie webs (5)...Williamson pipe (33° 37’ E, 3° 31’ S) at Mwadui in Tanzania, which is ovalshaped. Near the surface the axes...pipes pierce rocks of ages up to and including occurrence, but is found also in dykes and sills, and the...Nooitgedacht 381 JP and Winkelhaak 403 JP. Fissure occurrence is by no means as restricted as this, and several |
 | | Report (issue) |
| Pleistocene-Recent (Holocene) boundary for the Great Basin region, Nevada-Utah, by R. B. Morrison_ 115 331. Hydrothermal...Thickness of the Procellarian system, Letronne region of the Moon, by C. H. MarshalL _______________...major fa.ult lineaments can be recognized in the region (fig. 294.1). (1) The New Madrid fault zone extends...the Mississippi, Ohio, and Wabash Rivers in this region are very probably partly controlled by longcontinuing...Princeton, Ky. Unlike other domal uplifts of the region, such as the Ozark dome, the anticline formed during |
Marble occurrence, Morogoro, Uluguru Mts, Morogoro Region, Tanzania