 | Köster, H. M., Ehrlicher, U., Gilg, H. A., Jordan, R., Murad, E., Onnich, K. (1999) Mineralogical and chemical characteristics of five nontronites and Fe-rich smectites. Clay Minerals, 34 (4) 579-599 doi:10.1180/000985599546460 | Journal (article/letter/editorial) | | procedures. The structural formulae indicate one nontronite and one Fe-rich smectite to be montmorillonitic...The 18O/16O data suggest that fractionation of nontronite-water at ambient temperatures (1000 lna = 23...1980). The existence of a continuous beidellite±nontronite series was suggested on the basis of chemical...analyses by Ross & Hendricks (1945). However, a nontronite with montmorillonitic structure has been described...associated with nontronite. Opal has often been found in the vicinity of nontronite occurrences. Such |  | Nguetnkam, Jean Pierre, VilliĂ©ras, FredĂ©ric, Kamga, Richard, Ekodeck, Georges Emmanuel, Yvon, Jacques (2014) Mineralogy and geochemical behaviour during weathering of greenstone belt under tropical dry conditions in the extreme North Cameroon (Central Africa) Geochemistry, 74 (2) 185-193 doi:10.1016/j.chemer.2013.06.007 | Journal (article/letter/editorial) | | Greenstone belt Dry tropical climate Weathering Nontronite Kaolinite Mass balance a b s t r a c t Mineralogy...and an Ah horizon. The results indicate that nontronite, a Fe-rich smectite, is the exclusive clay mineral...of the neoformed smectites, which are probably nontronite. SEM observations (Fig. 5) conïŹrm their ferruginous...weathering are Fe rich smectites and are probably nontronite (Velde, 1995; Köster et al., 1999; Meunier, 2003)...and gave rise to the formation of Fe-smectites (Nontronite, Fe2 O3 > 15%) in the shells and the C horizon |  | | Journal (article/letter/editorial) | | ALTERATIONS OF HISINGERITE MATERIAL FROM A BASALT QUARRY NEAR GEELONG, VICTORIA, AUSTRALIA AHMAD SHAYAN...material in thejoints ofan overlying grey basalt and nontronite and Fe-rich saponite in the joints and matrix...of a more deuterically altered, underlying green basalt, the hisingerite material was treated in a series...steel container. Treatment of the unaltered grey basalt at 340·C and 50 MPa for 10 days resulted in complete...similar to the Fe-rich saponite found in the green basalt and an XRD pattern similar to that produced by |  | | Journal (article/letter/editorial) | | ferric iron in the lattice structure features the nontronite member of the montmorillonite group. Chromium...all the nontro· nites studied. INTRODUCTION Nontronite, a member of the montmorillonite group, was first...group, nontronite is one of the three minerals, namely, montmorillonite, beidellite, and nontronite, that...Genesis of Nontronite In the Columbia River region of Washington, Oregon, and Idaho, nontronite was formed...not always a prerequisite to the formation of nontronite, as shown by partial alteration of the glassy |  | | Journal (article/letter/editorial) | | hematite, XRD, synthesis 157 dissolution from nontronite by citrate-bicarbonate, citrate-bicarbonate-dithionite...W. BRINDLEY,D. S. FANNING, H. KODAMA,and R. T. MARTIN),Report of The Clay Minerals Society Nomenclature...content 49 vs. Ca, K content in vermiculite 311 Basalt hisingerite in joints in 272 Bauxite allophane...S. W. BAILEY,D. S. FANNING, H. KODAMA,and R. T. MARTIN), Report of The Clay Minerals Society Nomenclature...hectorite, Co-, Ni- 74 hisingerite, from joints in basalt 272 kaolin, Cornwall, Fisher 58 kaolinite, effect |  | | Journal (issue) | | ,. âą identified in light-toned constituents of basalt-probably _. red de po s i t s, ~--= ~ ·"'·Ia aye...kieserite in Juventae Chasma, north of Valles of nontronite. Since water is considered to be essential for...Louisville's geology class trips into the tluorspar district. One of the stops was the Pigmy (Pygmy) mine,...the only manganese minerals described from the district are "wad" which occurs in residual soils and manganese...fluorspar district. Reference Goldstein. A. 1997, The Illinois-Kentucky Fluorite District, The Mineralogical |  | | Book | | cavities in the middle portion of the flow. Given a basalt flow 25 meters thick with an initial molten temperature...Ardeche, France, zeolites are present only where the basalt flowed into a Pliocene lake or river (Fig. 5)(Robert...zeolites. The interior of the flow contains columnar basalt with small vesicles connected by minute veinlets...river) contains highly altered vesicular blocks of basalt (containing phillipsite and tiny rhombohedra of...the heated fluids. Zeolites in the Eocene olivine basalt flows in the Cairns Bay and Little Bird Rock areas | | | Book | | cavities in the middle portion of the flow. Given a basalt flow 25 meters thick with an initial molten temperature...Ardeche, France, zeolites are present only where the basalt flowed into a Pliocene lake or river (Fig. 5)(Robert...zeolites. The interior of the flow contains columnar basalt with small vesicles connected by minute veinlets...river) contains highly altered vesicular blocks of basalt (containing phillipsite and tiny rhombohedra of...the heated fluids. Zeolites in the Eocene olivine basalt flows in the Cairns Bay and Little Bird Rock areas |  | | Journal (article/letter/editorial) | | Qulnnv, HoNor,ur,u Petrography of nephelite-melilite basalt Determination of minerals in veins and cavities...Paragenesis IV. Lauarer Hrlls, HRw,trr Petrography of basalt Determination of minerals in amygdules Paragenesis...augite and zeolitesin a nephelite-melilite basalt exposedin a quarry near lfonolulu has been known since 1900...localities are representedin the collection: MoiliiH quarry, referred to above. This lies within the city limits...western Hawaii. Some of the specimens from this district are labelled "near railroad station, Kailua." |  | | Journal (article/letter/editorial) | | Sedimentary analcime in a small basin in Cainozoic basalt at Murrurundi, New South Wales, has probably resulted...from the reaction of Na-rich water on colloidal nontronite derived from volcanic ash. Based on cell dimension...approximately 5 m long and r'5 m deep, in Cainozoic basalt was exposed as a result of mining operations in...the New South Wales Department of Railways Basalt Quarry at Murrurundi, New South Wales. The basin was...the quarry floor were specimens of this laminated rock, basalt in contact with the rock, basalt containing |  | | Journal (article/letter/editorial) | | tandfonline.com/loi/tigr20 MINERALOGY OF WEATHERED BASALT CRUST IN WEST VOLYNYA V. P. Shashkina a a Lvov...V. P. Shashkina (1961) MINERALOGY OF WEATHERED BASALT CRUST IN WEST VOLYNYA, International Geology Review...page/terms-and-conditions MINERALOGY OF WEATHERED BASALT CRUST IN WEST VOLYNYA1 by V. P. Shashkina2 translated...by the pH value of the solutions The weathered basalt crust of West Volynya is a typical case of a crust...warm and humid climate. --Auth. *** The weathered basalt crust in West Volynya has not been studied sufficiently |  | | Journal (article/letter/editorial) | | MINERALOGY AND LAâICPâMS DATING OF SUPERGENE UâCu NONTRONITE-BEARING MINERALIZATION AT NABBURGâWĂLSENDORF...Dâ60054 Frankfurt am Main, Germany Abstract Nontronite has been reported from a wide range of mineral...sulfide-bearing parent material. In contrast, nontronite from veintype fluorite mineralization at NabburgâWölsendorf...not involved in this supergene mineralization. Nontroniteâuranocircite mineralization can develop in almost...are decisive as to whether nontronite, kaolinite or green opal (nontronite plus opal) comes into existence |  | | Journal (article/letter/editorial) | | specimens of zeolites have been obtained from a basalt quarry on Coffin Butte, located about 10 miles north...beds of intercalated sandstone,indicate that the basalt was extruded in several flows with short periods...best specimens collected to date have come from a quarry at the north east end of the Butte. At this place...rest on a cavity coating of nontronite, and occasionally the nontronite is included in the analcime crystals...crystals. The nontronite has a radiating spherulitic structure and shows considerable pleochroism, from |  | | Journal (article/letter/editorial) | | mineralogy of a saprolite developed on Columbia River Basalt: Secondary clay formation, element leaching, and...is preserved between flows of the Columbia River Basalt Group at Trinidad, Washington. Bulk chemistry,...titanomagnetite, and apatite. Secondary coatings of nontronite clay in the deep saprolite display intricate... The primary Fe-containing phase shifts from nontronite in deeper samples to hematite in shallow samples;...the boundary contain the assemblage kaolinite + nontronite, which may mark the transition from permeability-limited |  | | Journal (article/letter/editorial) | | oxisol-saprolite overlying serpentinite and underlying basalt was studied with different techniques to evaluate...montmorillonite-beidellite and montmorillonite-nontronite series, as well as illite, chlorite, talc, and...concentrated in the upper 50 cm thick zone underlying the basalt layer and chlorite-content increases toward altered...altered serpentinite at the base, Minor amounts of nontronite formed mostly toward westward exposures where...the hot contact layer between serpentinite and basalt is only 20 cm thick. Greene-Kelly Li-tests revealed |  | | Journal (article/letter/editorial) | | Marl a n d : A m p h i b o l e s in andesite and basalt: Stability 1069 as a function of , - ? - f o z...Krichterite, riebeckite, Kin andesite, thermal stability basalt, nephelinite G. AMTHAUER, with F. Rost, E. Beefllan:...and liotiPes: Quanzo5 titative Fe3'/Fe2- ratios Basalt 722 chenical analyses 1118 fibers and crystals... Allen, G. Marland: Anphiboles in andesite and basalt: I. Stability as a function of P-T-f^ f069 '42...Crystal _, structure of whitlockite frorn the Palerno quarry 120 CAMERON,KENNETHL. An experinental study of |  | | Journal (article/letter/editorial) | | with the leading raw materials sand plus gravel, quarry and dimension stones and limestones used for the...(Fig. 1). It has to be noted that among the term quarry and dimension stones there are also some hidden...extending from Belgium, in the West, through the Ruhr District, Germany, to the Upper Silesian Coal Basin, Poland...[Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O)] and nontronite [Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O] that characterize...rank very low among construction raw materials (quarry stones, dimension stones, aggregates) in Germany |  | | Journal (article/letter/editorial) | | NONTRONITE IN THE COLUMBIA RIVER REGION* Vrcron T. Ar-r,BNaNr VBnNorqE. Scnnro, GeologicalSuraey,...occurrences of nontronite have been discovered in Washington, Idaho, and Oregon. The nontronite has formed...halloysite are formed from plagioclase feldspar, while nontronite migrates and fills vesicles as well as cracks...with the formation of nontronite. fNtnonuctroN Several new occurrences of nontronite in Washington, Idaho...of the Interior. In the Columbia River region nontronite is associated with altered basaltic rocks, pillow |  | | Journal (article/letter/editorial) | | THE CRYSTALLINITY OF SYNTHETIC NONTRONITE AND IMPLICATIONS FOR NONTRONITE FORMATION IN COLUMBIA RIVER BASALTS...AbstractâThe formation conditions of the ferric smectite nontronite are not fully understood. The present study couples...naturally occurring nontronites from Columbia River Basalt flows. Synthetic Fe-Al-Si gels were incubated at...samples collected from weathered Columbia River Basalt flows. Cation ordering in the synthetic samples...the degree of crystal ordering of the natural nontronite samples. These observations suggest that highly |  | | Journal (issue) | | Arthur Roe Famous Mineral Localities: The Brumado District, Bahia, Brazil..................................Mont Blanc Swiss-French border region. genbach quarry specimens (see the Record, They really hit the...specimen was sold to the Smithsonian Institution by Martin Ehr mann in 1965. Smithsonian specimen #C6568;... âmanganous manganite,â calcite, piemontite, nontronite, hydromica Devon and Langdon mines Cryptomelane... pyrolusite, todorokite, goethite, hematite, nontronite, calcite. Mamatwan and Adams mines Cryptomelane |  | | Journal (article/letter/editorial) | | at the contact between a paleosol and a capping basalt flow. Features at the contact indicate the paleosol...Such environments are likely to occur wherever basalt flows are emplaced under warm, wet conditions promoting...clay formation environments on Mars. Keywords: Nontronite, Mars, clay minerals, Columbia River Basalts...potentially indicate in situ clay development by basalt alteration in a pedogenic environment (Loizeau...surface of Mars is largely basaltic in composition, basalt weathering systems on Earth have been targeted |  | | Journal (article/letter/editorial) | | Netherlands 327 LATERITIZATION AND BENTONITIZATION OF BASALT IN KUTCH, GUJARAT STATE, INDIA P.K. PATEL Department...K., 1987. Lateritization and bentonitization of basalt in Kutch, Gujarat State, India. Sediment. Geol...saprolite. INTRODUCTION Kutch, the northwestern district of Gujarat state, is a veritable treasure house...Eocene) Box (Fe,AL) LST 5APROLI T E HST B T R A P BASALT C altered fresh ~ Seaward W E [ „.. v v...Dominanl*** Present** Trace* In fact, the Kutch district is the largest producer of bentonite in India |  | | Book | | It is named from the locality, Askana, Ozurgety district, Georgia, vol- Transcaucasia. Belyankin, D....beidellite (nontronite). This group decomposition products of olivine in diabase-basalt rocks. is closely...locality under the name unghwarite. The name nontronite was later used for what was apparently the same...material. The name chloropal has priority over nontronite, but this mineral which is a hydrous silicate...opaline mineral, is unsuitable. Thus the name nontronite has been preferred. Bernhardi, J. J., and Brandes |  | | Journal (issue) | | area? My first thought is the Vulcan Materials Quarry in Manassas. It requires access with a group, although...nearby, you can drive your own vehicle into the quarry, and there are lots of interesting minerals to...werenât in on their finds or werenât able to go. The quarry is known for prehnite, apophyllite, stellerite...collecting sites. The rock here is an amygdaloidal basalt intrusion about 45 million years old, making it...little vugs for nice stuff such as analcime, nontronite, chabazite, harmotome, natrolite, and other minerals |  | | Journal (article/letter/editorial) | | montmorillonite and green boles are composed mainly of nontronite (smectite) and celadonite (mica). While the bole...chemically similar to each other and to the underlying basalt from which they were weathered, they are mineralogically...phyllosilicates observed so far are smectites such as nontronite (Fe3+) or â saponite (Mg) and montmorillonite...demonstrated that they can form from the weathering of basalt in slightly acidic (pH ~4) conditions. Other formation...used on all Deccan bole bed samples and on the nontronite and montmorillonite samples to which they were |
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