 | | Journal (article/letter/editorial) |
| border. The rocks have been folded, overturned to the west, but isoclinal folds appear to be rare. Slip cleavage...interpretation. Folding, flowage, and thrust faulting of an autochthonous series of argillaceous Lower Cambrian...The Taconic area 1. Indian Hill area 2. Berlin Valley General statement Area North Petersburg-Berlin...Lithologic characteristics Structure .. 4. North Pownal valley 5. Pownal upland General description Lithologic...Figure 1. Outline map of Taconic Range and Hudson Valley 814 2. Outline map of Taconic area east of Troy |
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| "ore-bearing zone" 1'ead "ore-bearing zone of the Knaben district," and transpose the paragraph with that following...somewhat similar to that of tungsten and vanadium. Hence an increased demand has sprung up for molybdenum ores...remark able properties, which are now manufactured on an exten sive scale. Owing to the shortage of tungsten...differs in yielding sulphur dioxide on heating in an open tube. The specific gravity is about 4·7. When...products derived from granitic magmas. There is also an important type of deposit in connection with crystalline |
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| carbonate spars free from cobaltiferous ores, especially an 8-meter (25-ft.) vein at the diorite contact, worked...mica. The iron deposits of Dobschau still yield an annual production of about 35,000 tons, but the cobalt...' This Kupferschiefer is cases. lean in this district, carrying only 1.4% of copper, and no silver,...fissures known as 'rucken' in the Mansfeld copper district also contain occasional nickelite, together with... known examples of this type is the cobalt district of Schneeberg, in Saxony, a mountainous region |
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| _________--____-_---_-------___-_--------_----_______ Ajo district.-_--_.____---------______--_-_--__---_______ Oatman...____________________________________________________ 11 Austria._____________________________________________________...______--__-__---_____----_____-__-___-___________ Bonanza district._________________________________________ Breckenridge...region___________________________________________ Spanish Peaks district.____________________________________ Summitville...________________________________________ Edwardsburg district._____________________________________ 11 11 12 |
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| paragenesis of the Little Three mine pegmatites, Ramona district, San Diego County, California ..................e ssa rtin e d ik e , L ittle T h ree m in e , S an D ieg o C o u n ty , C alifo rn ia. Los A n g e le...is the execution of the square root of a number. An increasing number of people have no idea how to do...all kinds of work later on. You may be able to make an important decision on the spot or be able to help...employment, he or she in many cases begins work on an independent level or a minimally supervised level |
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| Colluvial deposits.--- _________________________ Valley alluvium._____-_-_---_---_-_-_-____________ Structural...lie in a north-south line along the mountain front west of Denver; these quadrangles have been or are being...made in the metal-mining areas immediately to the west. In this report, the character, distribution, structure...following areas: Trail Creek and Chicago Creek areas, west of Idaho Springs (Harrison and Wells, 1956, 1959)...components of high metamorphic grade sillimanite with muscovite and locally microcline were also formed at this |
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| Mount Malosa, Chilwa alkaline province, Zomba district. "Illite" is the name of a series of incompletely...COLUMBIA Ice River complex. The Ice River complex is an intrusive body of alkaline igneous rocks where sodalite...ilmenite specimens have come from an unusual calcite vein-dike occurrence with an exposure very near, indeed...2008, when extensive blasting for construction of an extension to High,, ay 5 revealed veins of massive...(Weibel, 1980). The Maderanertal drainage flows west-southwest from a mountain massif to join the Reuss |
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| the Riesengebirge of German Silesia, at Wolfshau, west of Schmiedeberg. Similar occurrences have been observed...Hirichi (21) have described an occurrence of dumortierite in a quartz, rich muscovite pegmatite, and Linck (30)...dumortierite in the kaolinized products of decay of a muscovite biotite granite at several places in Bohemia,...Pelhfimov, near Putimov, where the dumortierite occurs in an aplite dike traversing granite and gneiss and in...others on the Kyshtymsk estate in the Uvildy Lake district of the Russian Urals (25). Inclusions of dumortierite |
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| PAPER 229 and prospects examz"ned in each district, some z"llustrated by maps .and structure sections...______________________ _ Latah County (A von mica district) ______________ _ Location and accessibility ___________________...prospects in Idaho-Continued Latah County (A von mica district)-Continued Fitzgerald property ___________________...Morning Star claim ________________________ _ Muscovite mine ___________________________ _ Location and...Albite-quartz pegmatite ____________ _ Quartz-albite-muscovite-beryl pegmatite ____________________ ,.. _______ |
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| Franz Josef Fjord to the foot of the Eiddar Valley on the west side of Kjerulf Fjord. Here the party divided...landed near Riddar Valley in order to map the tract of country lying immediately to the west of the head of...Nordenskiold Glacier, Franz Josef Fjord extends in an easterly direction for a distance of 110 miles. The...while progressively older sediments are found to the west, the lowest member being certain metamorphic rocks...Mathiesen to the Palaeocene or Eocene.3 In the district of Cape Franklin and extending north into the |
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| GEM- AND LITHIUM-BEARING PEGMATITES OF THE PALA DISTRICT, SAN DIEGO COUNTY, CALIFORNIA By RICHARD H.... GEM- AND LITHIUM-BEARING PEGMATITES OF THE PALA DISTRICT, SAN DIEGO COUNTY, CALIFORNIA! By Richard H....parts of the Pala district and In pocket Map of northern part of the Pala district, showing distribution...Aerial view of the Pala district 3. Aerial view of northern part of Pala district 17 4. Aerial view...view of Hiriart Mountain 23 6. Section through west tunnel, North Star mine 7. 8. 9. 10. 11. 12 |
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| wildest scenery i11 Central ltoss-shire. In t11e north-west corne1" of the map the1,e is a small patch of T1...Loch 11orth to Gr11inarcl Bay, the11ce east\vards by An Teallach, Strath Beg, it11d Strath Broom to Bei11n...the development of these rocks along the southern slope of the Fannich range. To 1vf1". Clough ,vas assigned...excellent photograph of the corrie rock-basin on An Teallach, represented i11 Plate VI. The Bibliog1laphy...Sheet 92 . . . . . 97 8. Map of parts of Central and West Ross-shire, showing distribution of boulders of |
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| ........................... 63 North Canaan and West Norfolk areas............................ 65 Limestone...... 97 97 High sands at entrance to East Lee Valley .......................... Deflected glacial drainage............................................... Muscovite ................................................pre-Cambrian gneisses; fig. 6, oyanite changing to muscovite.................................................12. Overturned anticline in Cleveland Mountain, west of Harmon Pond, New Marlboro................... |
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| come. Sufficient funds were not available to make an extensive search for vermiculite. The deposits described...vermiculite in north Georgia in the summer of 1934 under an allotment of Public Works funds. In 3 months of field...Geological Survey served as a base for the work farther west (pl. 7, fig. 2). There were also available the maps...cleavage more or less perfect in three directions and an uneven fracture. It is brittle and has a vitreous...interest in the development of domestic deposits. Such an enterprise must face competition from artificial |
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| Garnet. ANGLESITE (sulphate of lead). Tombstone district, Cochise County; Gila County, at Lost Gulch Mine...Bradshaw Mountains; Yuma County, in Castle Dome district; common in silver veins. ANTIMONY ORES. See Jamesonite...Montezuma and Empress of India mines, Tyndall district; Yavapai County, in ores of Bradshaw Mountains...and in massive serpentine at a location 20 miles west of Globe. AZURITE (hyrdous carbonate of copper)...County, was abundant at Copper Queen mine, Bisbee district. The finest specimens of Azurite"in many museums |
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| ....................... _. . 118 Porphyritic muscovite-biotite granite ...... _. .. ............ _............ ___ . _........ Areas on the southeast slope of the Anaconda Range _. __ .. ___________ ... ___.... . . . . . . . . . . . . . . . . . . 142 Folds west of the East Fork of -Rock Creek...................147 Observations in the upper part of Philipsburg Valley ........_........ _.. . ........... _.. . 147 Observations....................................... . . 226 Muscovite (sericite) ................ ·...... '........ |
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| others on any subject, uncreative though it may be, is an essential step in any orderly research. In this instance...mention. This compilation has been in progress as an avocation at intervalssome of them very long-since...real gold and "fool's gold"--commonly either muscovite or pyrite. As soon as vein gold was found in place...galena that had been recently found in the Tenmile district, Summit County. In his booklet, which today would...of references at the end of the volume will give an idea of the enormous mass of available knowledge |
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| to receive them." Except in those cases in which an extra number of any publication has been supplied...438 pp. 51 Tertiary History of the Grand Canon District, with atlas, by Clarence pi. xiv '%4 pp. 42...00. Geology of the Comstock Lode and the Washoe District, with atlas, by George F. Becker. 4'^ XV 422 pp...^' xiii, 298 VIII. Paleontology of the Enr.dca District, by Charles Doolittle Walcott. 1884. 4°. 24 1...338 pp. 35 pi. 1 map. X Dinocerata. A Monograph of an Extinct Order of Gigantic Mammals, by Othniel Charles |
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| MINING JOURNAL TRANSLATOR'S PREFACE. In presenting an English edition of Professor Beck's 'Lehre von den...the publishers to practically rewrite the book from an American standpoint, giving greater . prominence...advisable. For such additions and changes I alone am re- sponsible. , A slight abridgment of the...table of contents and index will, lar metal. am under deep obligation to Mr. Eobert Stein, of the...AUFLAGE Als die Vortrage iiber Lagerstattenlehre an der Kb'niglichen Bergakademie zu Freiberg mir iibertragen |
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| DEVELOPMENTS IN THE ASPEN DISTRICT, COLORADO By ADOLPH INTRODUCTION \ , The Aspen district of Colorado was mapped...the United States Geological Survey to visit the district, and he did so in July, 1923. The only topographic...mining developments in the southern part of the district, the correlation of the occurrence of ore in the...\ 1 Spurr, J. E., Geology of the Aspen mining district, Colo.: U. S. Geol. Survey Mon. 31, 1898. 1 *...The public demand for a resurvey of the Aspen district was in / essence a strong tribute to the great |
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| The EarlyGermanGeologistsand Entrepreneursin South West Africa The People- Mineralogists,Geologistsand Collectors...Central Escarpment- The Nauchas-Gamsberg-Hakos Area West and South of Rehoboth The Central and South-CentralDeposits...House W°Ntdhoek FOREWORD Namibia is endowed with an exceptionally rich mineralogical heritage, which...alike to our beautiful country to study it and gain an understanding and appreciation of this aspect of...indication of the incredible variety and of German South-West Africa(Deutsch- uniqueness of mineralsfrom Tsumeb |
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| Geology of Precambrian Rocks Central City District Colorado GEOLOGICAL SURVEY PROFESSIONAL PAPER 474-C...Commission Geology of Precambrian Rocks Central City District Colorado By P. K. SIMS and D. J. GABLE SHORTER...1918Geology of Precambrian rocks, Central City district, Colorado, by P. K. Sims and D. J. Gable. Washington...1918Geology of Precambrian rocks, Central City district, Colorado. 1964. (Card2) 1. Geology, Stratigraphic...diorite and horn blendite. ______-_.-__ Biotite- muscovite granite. _________----_____ Origin of intrusive |
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| Science-Engineering Mathematics Division, Cypress College, 9200 Valley View Street, Cypress, CA 90630; (714) 826-2220...1988 Photo 1. Trinity Alps pegmatite showing muscovite blades, Klamath Mountain Province. Photos by the... flexible, and elastic properties that make mica an important industrial mineral that is used in a wide...Studies indicate micas can be successfully used as an aid to locate certain metallic mineral ores. Biotite...analyses appear to have been used more often than muscovite analyses for exploration purposes (Olade, 1979) |
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| George Fast's mine, near La Trinidad, Sahuaripa district, Sonora, MexicoVII. Ends of radial plates of molybdenite...known molybdenum deposits of South America and the West Indies_____-______ 3. Principal known molybdenum...reviews uses, demand, and prices. An attempt is made in this paper to give an epitome of the world's larger...copper deposits, and wulfenite is in certain regions an oxidation product of lead veins. The minerals of...molybdate; erosite, a vanado-molybdate of lead; jordisite, an .amorphous sulphide of molybdenum: and pateraite |
 | | Journal (article/letter/editorial) |
| and " an island certainly from Tertiary times." 4 Sauer, " Ueber Riebeckit, ein neues Glied der Hornblendegruppe...have been asked to report. Dr. Forbes has given me an account of the mode of occurrence and distribution...East African Nyika series, and the island is simply an outlier of the East African plateau. Overlying the...him to determine it as Eocene. Kossmat also records an underlying Cenomanian sandstone with -Janira quinquecostata...The last member of the rhyolite-felsite series is an altered, finegrained trachyte from the Ghariah Plain |
