 | Taylor, Cliff D., Finn, Carol A., Anderson, Eric D., Joud, M. Y., Taleb, M. A., Horton, John D. (2015) Algoma-, Superior-, and oolitic-type iron deposits of the Islamic Republic of Mauritania (phase V, deliverable 83): Chapter O in Second projet de renforcement institutionnel du secteur minier de la République Islamique de Mauritanie (PRISM-II). Open-File Report Vol. 2015 (2013-1280) US Geological Survey doi:10.3133/ofr20131280o | Report (issue) |
| terrane, and (4) the Saouda Group of the Inchiri district. Neoarchean Algoma-type BIF is present in the...Eizzene and Oumachouema Groups of the Inchiri district, (6) the Ijibbitene Group of the Ijibbitene massif........................... 48 5.2.5 The Inchiri district.................................................location of geochronology samples DB07RIM-46a (quartzite in lower member) and DB07RIM-46b (muscovite schist...lower member of the Tazadit Formation, blocky quartzite interbedded with muscovite schist. Location of |
| | Report (issue) |
| terrane, and (4) the Saouda Group of the Inchiri district. Neoarchean Algoma-type BIF is present in the...Eizzene and Oumachouema Groups of the Inchiri district, (6) the Ijibbitene Group of the Ijibbitene massif........................... 48 5.2.5 The Inchiri district.................................................location of geochronology samples DB07RIM-46a (quartzite in lower member) and DB07RIM-46b (muscovite schist...lower member of the Tazadit Formation, blocky quartzite interbedded with muscovite schist. Location of |
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| County . . . . . . . . . . . . · .23 Iron Springs district deposits . . . . . . . . . . . . . . . 23 Location... . . . . 31 9. Size and shape of Iron Springs district intrusions, from outcroppings and geophysical...porphyry, Iron Mountain. . 40 13. Iron-Springs district iron occurrences, Iron County . . . . . . . ....Washington County iron occurrences .84 30 Bull Valley district iron occurrences, Washington County . . . . .... . . .90 31. Pilot iron deposits, Bull Valley district, Washington County . . . . . . . . . . . .93 |
 | Dobrzyński, Dariusz, Duliński, Marek, Birski, Łukasz, Barrett, Jordi (2021) Origin of the chemical composition of São Francisco ultra-fresh thermal water (Itabira region, Minas Gerais, Brazil) Applied Geochemistry, 134. 105090pp. doi:10.1016/j.apgeochem.2021.105090 | Journal (article/letter/editorial) |
| São Francisco ultra-fresh thermal water (Itabira region, Minas Gerais, Brazil) Dariusz Dobrzyński a, *...studied water, contained in highly resistant quartzite-dominated aquifer rocks. Application of a geothermometric...Minas Gerais state today. Water flows out from quartzite aquifer-rocks, which are highly resistant to weathering...local precipitation. Groundwater associated with quartzite rocks are rare in nature due to the relatively...investigations of chemical composition of groundwater in quartzite aquifers rather poor and rare. An example list |
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| 'low level' laterite profile from Tira, in Busia District, Uganda, is described. Mineral and chemical progressions...Uganda drilling records) is located in Tira, Busia District, near the Victoria/Kyoga watershed, close to the...also forms lowlands above which rise narrow quartzite ridges. To the east of Tira rise the prominent...technique which separates the numerous small quartzite and carbonatite summits from the much more extensive...small summits attributed to carbonatite and quartzite outcrops from the laterite-blanketed Kasubi and Tanganyika |
 | Jacobson, Herbert S., Pierson, C.T., Danusawad, Thawisak, Japakasetr, Thawat, Inthuputi, Boonmai, Siriratanamongkol, Charlie, Prapassornkul, Saner, Pholphan, Narin (1969) Mineral investigations in northeastern Thailand. Professional Paper 618. US Geological Survey doi:10.3133/pp618 | Report (issue) |
| visits to villages in the area to locate mineral outcrops or boulders known to the local residents, followed...erosion above an elevation of 300 m where rock outcrops are only slightly weathered, in contrast with...Sandstone, quartzite, phyllitic shale, slate, and limestone. Unnamed Argillite, quartzite, slate, phyllite...rocks including phyllitic shale and sandstone, quartzite, slate, and limestone which were previously included...metamorphism has formed slate, phyllite, argillite, and quartzite. Schist has also been reported (Saurin, 1963) |
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| pressure probably exceeding 4 kbar. Key words: Quartzite, pumpellyite – actinolite facies, East Sudetes...metamorphism is of staurolite zone close to the thrust region and decreases to that of chlorite zone in the east...155 Fig. 1. Geological sketch map of the quartzite outcrops in the Fore-Sudetic part of the Ï Cervenohorské...indicate described exposures. The inlet shows outcrops of crystalline basement (lines) and intrusive...clinozoisite, chlorite, titanite secondary muscovite, goethite (7) Jehlan M 1566 (1*) clinozoisite, chlorite |
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| along the international border in the boot heel region of southwestern New Mexico K. E. Zeigler', P. Hogan^...either known procurement sites ("quarries") or outcrops identified as the closest source to a given site...constructed from obsidian were transported into the region from northern Mexico and eastern Arizona, indicating...Introduction Lithic procurement strategy in the Boot Heel region of southwestern New Mexico has largely gone untreated...procured from the major geologic features of the region. The Boot Heel of New Mexico, as well as southeastern |
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| THE GEOLOGY OF THE CUYUNA DISTRICT, MINNESOTA: A PROGRESS REPORT UNIVERSITY OF MINNESOTA MINNESOTA...DIRECTOR BULLETIN 36 The Geology of the Cuyuna District, Minnesota A PROGRESS REPORT BY FRANK F. GROUT...F. Wolff, Sr., studied the mines of the Cuyuna district in considerable detail. About 1940 a brief synopsis...preparing a bulletin on the geology of the Cuyuna district, using as a basis Wolff's maps, structural cross...thirty-six years since the only major report on the district was prepared by E. C. Harder and A. W. Johnston |
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| PREFACE The barytes deposits of the Cartersville district of Georgia are the most productive in the United...geology and barite deposits of the Cartersville district, Ga.: ·The Tradesman, pp. 35-37, May 22, 1910...in ten days of :field work in the Cartersville district. Georgia continues to lead the states in the production... . . . . . . . . . . . . 17 -1H Oarters·ville district ......................................... 19-125... . . . . . . . . . . . . . . . 22-23 Weisner quartzite ............................ :. . . . . . 23-25 |
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| Proterozoic Michigamme Formation and Goodrich Quartzite, Northern Michigan Regional Stratigraphic Implications...Proterozoic Michigamme Formation and Goodrich Quartzite, Northern Michigan Regional Stratigraphic Implications...CONTRIBUTIONS TO PRECAMBRIAN GEOLOGY OF LAKE SUPERIOR REGION P.K. SIMS and L.M.H. CARTER, Editors U.S. DEPARTMENT...Proterozoic Michigamme Formation and Goodrich Quartzite, northern Michigan: regional stratigraphic implications...(Contributions to Precambrian geology of Lake Superior region; ch. R) Includes bibliographical references. Supt |
 | Houston, Robert Stroud, Desborough, George A., Karlstrom, K.E., Sharp, W.N., Graff, Paul J. (1979) Progress report on the study of radioactive quartz-pebble conglomerate of the Medicine Bow Mountains and Sierra Madre, southeastern Wyoming. Open-File Report Vol. 1979 (79-1131) US Geological Survey doi:10.3133/ofr791131 | Report (issue) |
| assemblage of Phantom Lake 14 Trough crossbeds in quartzite of the upper part of the assemblage of Phantom...contains ore grade material at the surface, but most outcrops are oxidized, and geochemical studies by Miller...suggest that uranium has been leached from surface outcrops. Drilling, therefore, may be the only way to prove...resembled the Huronian rocks of the Great Lakes region. The first description of miogeosynclinal metasedimentary...the presence of radioactive conglomerates in the region. During the 1960's and 1970's, geologic studies |
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| CENTRAL MINNESOTA INCLUDING THE CUYUNA IRON-ORE DISTRICT BY E. C. HARDER AND A. W. JOHNSTON MINNEAPOLIS... 23 Descriptions of rock outcrops.............................. 30 Outcrops of silicic igneous rocks.... . . . . . . . . . . . . . . . .... . . . 40 Outcrops of subsilicic igneous rocks. . . . . . . . . ...counties. . . . . . . . . . . . . . . . . . . 52 Outcrops of slate, schist, and other metamorphic rocks...southern St. Louis counties. . . . . . . . 65 90 Outcrops of sandstone and other clastic rocks. . . . . |
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| The Eureka Mining District Nevada By THOMAS B. NOLAN GEOLOGICAL SURVEY PROFESSIONAL PAPER 406 Prepared...______________________________ _ Prospect Mountain quartzite ________________ _ Pioche shale _______________________________...group _____________________________ _ Eureka quartzite ___________________________ _ Hanson Creek formation...the Eureka mining district, Nevada. 2. Geologic sections of the Eureka mining district, Nevada. 3. Geologic...Geologic structure map of the Eureka mining district, Nevada. UI 24 25 26 26 26 26 27 27 27 27 28 28 29 |
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| a b r i e f h i s t o r y o f t h e gems o f e region. T h i s C h a p t e r also includes t h e g e...Carolina. 4 • r Siwstmt' Old mines and rocky outcrops of the Appalachians are hidden beneath a sea of...good reason, is the Smithsonian, located in the District of Columbia between Maryland and Virginia, where...materials on the dumps and in the mines of this region. However, since this boom is over, there is little...If it sounds as if I am sold on this beautiful region, it is because I am. So pack your knapsack and |
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| Geology and Ore Deposits of the Itabira District Minas Gerais, Brazil GEOLOGICAL SURVEY PROFESSIONAL...341-C Geology and Ore Deposits of the Itabira District Minas Gerais, Brazil By JOHN VAN N. DORR 20 and...___________________________ Schists____________________________ Quartzite and meta-arkose(?)_________ Dolomitic schist ...46 47 49 49 50 51 Page Geology of the Itabira district Continued Structure Continued Folds in other ..._ Conceigao area_____________________________ District reserve estimate.._"______________________ Summary |
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| undertake a reconnaissance investigation of the general region. More recent publications, among these the works...commonly referred to simply as kyanite quartzite. Individual quartzite units range up to approximately 15...The distinction of three varieties of kyanite quartzite based on degree of weathering and weathering profile...locally interbedded with the dominant kyanite quartzite. The rock con tains ubiquitous pyrite in amounts...adjacent kyanite quartzite. The quartz-sericite schist, like the kyanite quartzite, ex ists in several |
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| plate of a southeast-dipping detachment fault that outcrops at the eastern edge of the Harquahala Mountains...fluorite district, the Aguila manganese district and the Osborne base and precious metals district. The U...U.S. Mine is part of the Osborne district. Each of these districts is described in some detail in a copy...largest producer of precious metals in the Osborne district (the largest being the U.S. Mine) . A galley proof...ingbird rhy olite tuffs and f lows. 25 .3 0.9 Outcrops of massive and irregular white quartz veins Proterozoic |
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| Schiehallion district Table 1 Summary of the geological sequence in the Schiehallion district. Metasedimentary...Killiecrankie Schist Fm lsLW SuJiC.ROUP Sch iehallio n Quartzite Fm Tempar Dolo m itic Member Sc hiehalli on Bo...Su·ath Fionan Banded Semipelite Fm lvfeall Dubh Quartzite Fm l\Ieall Dubh Graphitic Sch ist Frn Meall Dubh...il Sch isL Fm Beoil Quartzite Fm OunaJasta.ir Se mipelite Fm Dunalas tair Quartzite Fm CRAMPJ,,N CROUP...Kynachan Psarmnite Frn Kynachan Quartzite Frn Tumrnel Psarnmite Fm Tumme l Quartzite Fm ATHOLt SU8CROUI' Bruar |
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| Paleozoic area in association with the Weisner quartzite, Knox dolomite and Chickamauga limestone, (3)...Likewise the deposits in the quartzite areas are found largely near quartzite contacts with slates, schists...formations. Subsequently, upon the uplifting of the region, which is supposed to have taken place at the end...mode of occurrence. The deposits in the Cedartown District have largely resulted from this process of deposition...apparently, at the time of the deformation of the region at the end of the Paleozoic. The ore was deposited |
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| _______________ Chapter D. Geology of the Felch Mountain district, by Carl A. Lamey Introduction. ___________--...Chocolay group___ -----------------------Sturgeon quartzite-___________-----__--Occurrence and characteri...--------------Ferruginous quartz-mica schist and quartzite __________-__-_--------Feldspathic quartz-mica...al metamorphism_ -------------------Sturgeon quartzite.____________-_------Randville dolomite____ --... CONTENTS Chapter D. Geology of the Felch Mountain district Con page Structure _______-__-__________-___--____-_-_-__ |
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| MINES With a section on the THUNDER MOUNTAIN DISTRICT By B. F. LEONARD, U.S. GEOLOGICAL SURVEY, and...Dolomitic marble _______________________________ Quartzite, gneiss, and schist _________________________...Formation ___________________________ Hoodoo Quartzite ______________________________ Age and stratigraphic...______________________ Salmon River district ____________________________ Chamberlain district _____________________________..._______ Edwardsburg district _____________________________ Ramey Ridge district ____________________________ |
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| be distinguished: Surface gossan with hematite, goethite and supergene fluorite, magnetite-fluorite transition...(S24° 54.341' E30° 07.742' 1046 m) We visited outcrops of the Middle Group chromitite seams and associated...al., 2000). The layered Bushveld Complex with outcrops subdivided into the western, eastern and northern...layers. The layers dip towards the west. Footwall outcrops are norites continuing upwards towards mottled...quality is quite poor. Coarse –grained pyroxenite outcrops above the UG-2. Bright, weathered silicate spots |
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| Cambrian dolomite- ____________ Oxide ores in Erwin quartzite. ' _ _ __ Oxide ores in Shady dolomite _ Oxide...__________________ Johnson County ___ ___ _ Shady Valley district _________________________ Reynolds mine________...Continued. Johnson County Continued. Mountain City district ____ __________________ Taylor Valley mine___...Doe Valley mine______________1___________ Butler district ______________________________ Proffit prospe...___'. _ Carter County '. _ __ ________ Butler district _________________ __ _ __________ Elk mine __ |
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| quartz-ankerite rock_ __________________________ Quartzite __________________________ Conglomerate. _____________________...Tamandu& Group..____________t____________ Cambotas Quartzite..___________________ Unnamed formation___________________...Formation. _ _ _ _ Fe~cho do Funil Formation. Tabooes Quartzite. _______ Barreiro Formation. ______ Sabara Formation...Photograph of typical bare outcrops and cliffs of the Cambotas Quartzite in the Serra do Caraga_ _______..._______ Photograph of typical cliffy outcrops of the Cambotas Quartzite in the Serra das Cambotas______________ |
