 | | Book | | (because ofthe same secrecy). Thus, even if a small occurrence, stream, or hill was used as reference, it was...discovery; first the of history cplityand the occurrence color, size, (morphologY, find first the of cription...not precisely located, the environs of mineral occurrence is indicated with a circle instead of a point...in 1 956 in the core of a borehole in the Aksai Valley at the giant Chelkar salt dome, Uralsk district...southern s lope of the western margin of the Kurai Range, Kosh Agach district, Gorny Altai. Aktashite �rystals |  | | Book | | Topaz (p . 2) - idiomorphic crystal (9 mm); Thomas Range (USA) Text by Rudolf Dud'a and Lubos Rejl Revision...System of mineral classification 8 Origin and occurrence of minerals 8 Associated minerals 11 Properties...Lastly, data on the genesis, associated minerals, occurrence and application are included. The tabulated section...the minerals in this book as well. Origin and occurrence of minerals In order to gain some knowledge of...concentrations of zircon, xenotime, monazite, cassiterite, columbite, tantalite, allanite, emerald, sapphire |  | | Book | | the earlier history, indeed the prehistory, of a region. Conglomerates speak of a time when high nearby...cleavage lines meeting at an angle of nearly 907 CASSITERITE nonmetallic, uneven or curved like the interior...COLOR KEY TO MINERALS 17 Brown Streak: CASSITERITE Fracture: nonmetallic, Luster: brilliant...WILLEMITE Luster: shell-like. to OR TRANSLUCENT CASSITERITE Black nonmetallic. Hardness: 6.5; can be scratched...prismatic. shell-like to Fracture: uneven. RHODONITE Luster: glassy. Hardness: 5.5-6. Cleavage: |  | | Book | | " However, this problem became such a common occurrence that it made more sense to drop this boring repetitive...senior author. Occurrence Wherever possible, I have tried to include the type of occurrence. This may be...This is a very short statement about the mode of occurrence: grains, crystals, aggregates, etc. as well as...France Germany Greece India Italy Japan Kazakhstan Kyrgyzstan Moon Nu111ber of Species Number of Species...Saint-Hilaire, Rouville County, Quebec, Canada. Occurrence: A single crystal (coated by an unidentified |  | | Report (volume) | | deeper circulation _____ _ _____ _________ The region of nearly stagnant waters _ Pulsating movements...sulphide zones._ _ ______________________ 172 Occurrence of the copper minerals_________________ 176 Copper-bearing...Arizona________________________ 228 San Francisco region, Utah, by B. S. Butler_________ 229 Yerington,...Silver-lead deposits 268 Silver-copper deposits 269 Occurrence of silver minerals_________;__________ 270 Silver-bearing...California________________ 327 Nevada City and Grass Valley, California__________ 327 Ophir, California __ |  | | Book (volume) | | discovery of an original(?) reference to a species' occurrence was a delightful triumph. Many original references...from Black Mountain in Rumford, Maine? Are the cassiterite crystals of Resplendor, Minas Gerais, Brazil...preservation of authenticated specimens of each mineral occurrence. Most species are abundant enough that they will...rule is usually true only for special items from a region. The common minerals are not usually thus affected...specimens sell for a premium is that visitors to a region seldom arrive when the supply of minerals is being |  | | Book | | Sections of this book are devoted to the origin and occurrence of minerals and gems, others to a study of various...Mineralogy helps us decipher the origin, chemistry, occurrence, and properties of minerals. Those who explore...example, corun- be of a size within the accuracy range of the or voids. It air cavities dum be dry when...fairly constant, chemical the measurement may range of a therefore an excel- It is make to is...a were developed. Such lamps now cover a wide range of relatively intense ultraviolet light, 23 24 |  | | Report (issue) | | series is comprehensive in that it includes the occurrence data given in all the previously published bulletins...Uralite Pargasite Anthophyllitc Gedritc Riebeckite Rhodonite Babingtonite Woliastonite Xonotlite Bertrandite...beryl, biotite, blythite, cairngorm, calcite, cassiterite, cerussitc, chabazite, chalcedony, chalcocite...muscovite, paragonitc, pyritc, pyromorphitc, quartz, rhodonite, selenium, silver, sphalerite, sulphur, talc,...picotitc, pinitc, pyritc, pyrrhotite, quartz, rhodonite, ricbcckite, rutile, scorodite, scricite, sillimanite |  | | Report (issue) | | second guest activity was a tour of the Salt Lake Valley to experience its history, culture, and recent...ELEVATION IMAGES: AN EXAMPLE FROM THE COLORADO FRONT RANGE . . . . . . . . . . . . . . . . . . . . . . . .... . . . . . . . . . . . . . . . . . . . . . 128 Range of Impact . . . . . . . . . . . . . . . . . . ..... . . . . . . . . . . . . . . . 161 JADE AND RHODONITE DEPOSITS, BRITISH COLUMBIA, CANADA . . . . . ... . . . . . . . . . . . . . . . . . . . . 168 RHODONITE . . . . . . . . . . . . . . . . . . . . . . . |  | | Report (volume) | | .......................................... The region of nearly stagnant waters........................the copper minerals.......................... Occurrence of the copper minerals.........................the silver minerals.......................... Occurrence of the silver minerals.........................compounds...................................... 135 Occurrence of the lead minerals...........................compounds...................................... 140 Occurrence of the zinc minerals........................ |  | | Report (volume) | | .............................. Character and occurrence.................................. Metamorphism............................... *Condition of the region in pre-Cambrian time................... Algonkian................................. Character and occurrence. .^ ........................... Smithfield limestone............................................... Occurrence........................................................................ 39 Taconic Range and Housatonic Valley.............................. 39 Stockbridge |  | | Report (issue) | | Zion porphyry_ 50 Other porphyries in Mosquito Range re51 gion _ Age relations of porphyries at Leadville_...Psilomelane and wad_ 156 156 Pyrolusite _ 173 Rhodonite _ 156 Zinc minerals.. _ 173 Serpentine _ 156 In...231 and relation to structural features_ _ 179 Occurrence 1 231 Relation of veins to erosion 1 180 Megascopic...1 Analyses 1 236 Pyrite-chalcopyrite ore 1 185 Range in metal content 1 1 236 Highly siliceous ore1 185...bodies to character of Distribution and mode of occurrence 1 238 wall rock 1 186 Geographic distribution |
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