 | Dekoninck, Augustin, Monié, Patrick, Blockmans, Sabine, Hatert, Frédéric, Rochez, Gaëtan, Yans, Johan (2019) Genesis and 40Ar/39Ar dating of K-Mn oxides from the Stavelot Massif (Ardenne, Belgium): Insights into Oligocene to Pliocene weathering periods in Western Europe. Ore Geology Reviews, 115. 103191 doi:10.1016/j.oregeorev.2019.103191 | Journal (article/letter/editorial) | | K-Mn oxides from the Stavelot Massif (Ardenne, Belgium): Insights into Oligocene to Pliocene weathering...University of Namur, 61 rue de Bruxelles B-5000 Namur, Belgium Géosciences Montpellier, UMR-CNRS 5243, Université...Prince de Liège B-5100, Jambes, Belgium d Laboratoire de Minéralogie, Université de Liège, 14 allée du...du six août B-4000, Liège, Belgium b c ARTICLE INFO ABSTRACT Keywords: Manganese deposit Ardenne Stavelot-Venn...the Stavelot inlier (NE Ardenne, Rhenish Massif, Belgium) has drawn the attention of geoscientists for more |  | | Journal (article/letter/editorial) | | pages I2l1-1224, 1987 Fibers and cylinders of cryptomelane-hollanditein Permian beddedsalt, Palo Duro Basin... hollow cylinders of cryptomelane-hollanditehave been found in both the chevron and the clear salt from...identified the fibers and cylinders as members of the cryptomelane-hollandite series.Tunnel cations (A) of the...of cryptomelane-hollandite,but these are found almost entirely in fluid inclusions in the chevron and...suggeststhat they were formed contemporaneouslywith the chevron structure and were accidentally trapped in the |  | | Journal (article/letter/editorial) | | colloids. Occurrences of skeletal crystals in dense cryptomelane were more difficult to explain. Recently further...further occurrences of braunite and cryptomelane showing chevron layering have been noted and examined...grey cryptomelane, and it commonly occurs as parallel, tabular layers alternating with cryptomelane, and...compositions of the braunite and F1G. 1. Examples of (a) chevron layered structures and (b) fortification structure...structure of braunite (dark grey) and cryptomelane (pale grey). Reflected light ( x 300). 507 SHORT COMMUNICATIONS |  | | Journal (article/letter/editorial) | | colloids. Occurrences of skeletal crystals in dense cryptomelane were more difficult to explain. Recently further...further occurrences of braunite and cryptomelane showing chevron layering have been noted and examined...grey cryptomelane, and it commonly occurs as parallel, tabular layers alternating with cryptomelane, and...compositions of the braunite and F1G. 1. Examples of (a) chevron layered structures and (b) fortification structure...structure of braunite (dark grey) and cryptomelane (pale grey). Reflected light ( x 300). |  | | Book | | ores were exploited in the Venn-Stavelot Massif (Belgium). There are two varieties and their formations...these minerais are among the most interesting in Belgium. 3 Le manganèse en Ardenne Table des matières...Vielsalm-Bihain-Lierneux d'une part et aux environs de Chevron d'autre part (Fig.3). C'est dans ces deux région:... Salmien (Sm) Inférieur Jalhay (JAL) Eupen Liège Verviers Kl [Groupe de Rev rancorchamps ~| Groupe...3 Dussart N. & Dussart J. (1991). Les mines de Chevron et Rahier. Le man ra par remplacer le procédé |  | Roedder, Edwin, d'Angelo, W.M., Dorrzapf, A.F., Aruscavage, P.J. (1987) Composition of fluid inclusions in Permian salt beds, Palo Duro Basin, Texas, U.S.A. Chemical Geology, 61 (1) 79-90 doi:10.1016/0009-2541(87)90029-5 | Journal (article/letter/editorial) | | obtained on a few of the clouds of troy mclusmns m "chevron" salt, representing the brmes from whmh the salt...cogenet]c, as m the clouds of troy mclusmns m chevron salt (Roedder, 1984b) In the present work, several...cogenetic mclusmns m primary, nonrecrystalhzed chevron salt The procedures revolve various prewously described...crystalhne clear hahte, w~th no nearby evidence of chevron texture, and hence are believed to represent hahte...recogmzed. Some samples of salt from Palo Duro have cryptomelane-hollandlte fibers in some of the fired mclusmns |  | | Journal (article/letter/editorial) | | cut perpendicular to bedding.Such salt is called chevron salt, and the cubic planesof inclusionsin it, like...fluid inclusions in single crystal of primary chevron salt from Palo Duro basin, Texas. Fig. 5. Typical...bandedarray of primary fluid inclusronsin pnmary chevron salt crystal from Delaware basin, New Mexico. Fig...crystallized during the Permian. The depth at which chevron growth may have occurred has been a subject of...inclusion-rich and inclusion-poor zones forms the chevron texture in the many salt depositswhere it has been |  | Moëlo, Yves, Pecorini, Robert, Ciriotti, Marco E., Meisser, Nicolas, Caldes, Maria Teresa, Orlandi, Paolo, Petit, Pierre-Emmanuel, Martini, Bruno, Salvetti, Adrio (2014) Tubulite, ~Ag2Pb22Sb20S53, a new Pb-Ag-Sb sulfosalt from Le Rivet quarry, Peyrebrune ore field (Tarn, France) and Biò, Borgofranco mines, Borgofranco d'Ivrea (Piedmont, Italy) European Journal of Mineralogy, 25 (6) 1017-1030 doi:10.1127/0935-1221/2013/0025-2334 | Journal (article/letter/editorial) | | Libelo (1987). Here it corresponds to crystals of cryptomelane-hollandite growing within Permian bedded salt...one cylinder per fluid inclusion is found in the chevron salt whereas multiple cylinders are commonly found...recrystallization of the primary chevron salt. Cylinders trapped in chevron salt would perhaps remain as...Libelo, E.L. (1987): Fibers and cylinders of cryptomelane-hollandite in Permian bedded salt, Palo Duro |  | | Report (issue) | | Comments: p. 356; 906. VHN: Mineral Name: Cryptomelane Chem. Comp.: A<=2B8.O16 Crystal., mono (pseudo^agonal)...uncommon Polish. Hard.: >manganite, pyrolusite, cryptomelane; ...Reflects.: VHN: 60-100 Polish. Hard.: >crypto-xln cryptomelane; ...Comments: Pink colors and hardness are distinctive; chevron-like twinning may occur; sometimes forms concentric...Comments: Common Mn mineral, only pyrolusite and cryptomelane are encountered more frequently; forms finely |  | Kong, Kyeong Pil, Fischer, Timothy B., Heaney, Peter J., Post, Jeffrey E., Stubbs, Joanne E., Eng, Peter J. (2019) Mineralogical and geochemical constraints on chromium oxidation induced by birnessite. Applied Geochemistry, 108. 104365 doi:10.1016/j.apgeochem.2019.104365 | Journal (article/letter/editorial) | | Geosciences, The Pennsylvania State University, USA Chevron, 3901 Briarpark Dr., Houston, TX, 77042-5397, USA...(including hausmannite, manganite, romanechite, cryptomelane, lithiophorite, pyrolusite, and birnessite)...Cr(III)aq reactivity among Mn oxide minerals (cryptomelane, todorokite, hausmannite, and birnessite) and |  | Fusswinkel, Tobias, Wagner, Thomas, Wenzel, Thomas, Wälle, Markus, Lorenz, Joachim (2013) Evolution of unconformity-related MnFeAs vein mineralization, Sailauf (Germany): Insight from major and trace elements in oxide and carbonate minerals. Ore Geology Reviews, 50. 28-51 doi:10.1016/j.oregeorev.2012.08.001 | Journal (article/letter/editorial) | | large grains of hematite Ib, a weakly developed chevron-shaped growth zoning is visible (Fig. 6e). Rarely...±hausmannite, (±todorokite), (±pyrolusite), (±cryptomelane), (±brandtite), (±sailaufite), (±bertrandite)...of the alteration stage. Sample: Sai-016. (e) Chevron zoning in hematite Ib (ore stage 2). Sample: Sai-079...detection limit (about 350 ppm) and 1.0 wt.%. The chevron zoning observable in sufficiently large grains (Fig |  | | Journal (issue) | | Chrysocolla Copper Cornwallite Covellite Cuprite Cryptomelane Ferrimolybdite Goethite Gold Gypsum Halloysite...dickite, on the Leonard 3,800 level (1159 m). Cryptomelane K(Mn+4,Mn+2)8O16 Black, mammillary “psilomelane”...mineral species cryptomelane. Guilbert and Zeihen (1964) reported that cryptomelane was common in pyritepoor...the silverrich veins themselves, together with cryptomelane, ramsdellite, romanechite, native silver, and...Minéraux de Belgique et du Congo Belge. Paris and Liège, 573 pp. CAIRNCROSS, B., and DIXON, R. (1995) Minerals |  | | Book | | Continental drift 6.11. Deformed and veined rock 6.12. Chevron fold 6.13. Anticline 6.14. Fold 6.15. Fold-fault...Smithsonian Institution) 30 Geology and Virginia cryptomelane, psilomelane, and manganite. Earthy wad is soft...mark on paper; manganite has a hardness of 4; cryptomelane and psilomelane, which cannot be distinguished...veins. Deformed Rock 141 FIG. 6.12. County. Chevron fold from Floyd FIG. 6.13. Anticline. Several...Calcite Amphibole Pyroxene Psilomelane (and cryptomelane) Cassiterite Garnet Quartz Staurolite Tourmaline |  | | Journal (entire run) | | phosphophyllite. hemimorphite, switzerite, cryptomelane and chalcophan 1te. The evening of day four...associated with z.incian collinsite. scholzite, and cryptomelane, all of which occur upon rock bridgeite. Rockbridgeite...scholzitc crystals also occur on botryoidal cryptomelane. Besides Reaphook, scholzite crystals have formed...1 974) which are implanted on rockbridgeite. cryptomelane or chalcophanite; it was the last of t he zincian...Au tralia ( Bridge and Pryce, 1 974). Oxides Cryptomelane KM n1 • M n� · 0 This potassium-manganese double |  | Litherland, M., Annells, R. N., Appleton, J. D., Berrangé, J. P., Bloomfield, K., Burton, C. C. J., Darbyshire, D. P. F., Fletcher, C. J. N., Hawkins, M. P., Klinck, B. A., Llanos, A., Mitchell, W. I., O'Connor, E. A., Pitfield, P. E. J., Power, G., Webb, B. C. (1986) The geology and mineral resources of the Bolivian Precambrian shield. Overseas Memoir 9. British Geological Survey | Report (volume) | | prominent as granulite hillforms. tvlegascopic chevron folds are found in the gneisses. Further west (11)...£NE-trending, upright, open, parallel buckJe folds, with chevron folds developed in pelitic layers, over a local...subhorizontally banded and folded cryptomelane laminae separated by cryptomelane needles to forrn a reticulate...great significance (18). A composite specimen of cryptomelane protore from Cerro Manganeso in Serranfa San...registered up to 4.5% Pb (see p.123). Although cryptomelane may adsorb appreciable quantities of lead, this |  | | Journal (issue) | | Ag4Hg5S4(Cl,I,Br)4 Unknown Ag,Hg,Cl,S Coronadite Cryptomelane Goethite Groutite Hematite Partzite Plattnerite...in its EDS compositional spectrum. Cryptomelane KMn80 16 Cryptomelane was identified in a few of the Anticline...the sheaves; bright luster and the presence of chevron-arranged terminal faces on the ends complete the...Windisch 30 Van Wouw Street Groenkloof, Pretoria Belgium Paul Van Hee Marialei 43 B-2900 Schoten Canada |  | | Report (issue) | | Minerals International Charles Evans and Associates Chevron Corporation Finnegan Mat Ann and Gordon Getty Foundation...Musee Royal de l'Afrique centrale, 3080, Tervuren, Belgium, RASSKASOV, S., Inst. of the Earth Crust, 664033...Universiteit Brussel, Pleinlaan,2 1040 Brussels, Belgium. ISOTOPIC CONSTRAINTS ON AGE AND SOURCES OF SOME...Universite Libre de Bruxelles, B-1050 Bruxelles, Belgium ABSOLUTE TIMING OF THRUST FAULTINGA THERMOCHRONOLOGICAL...Bruxelles, Av. F.D. Roosevelt, 50, 1050 Brussels, Belgium. Groundwater quality is controlled by many factors |  | | Report (issue) | | meteorological measurements were made by employees of the Chevron Resources Company Geothermal Division, which operates...manganese oxides hollandite, coronadite, and cryptomelane constitute deposits gradational from massive...and Abstracts 41 oxide cavity infillings (cryptomelane and coronadite). Bulk chemical analyses of manganese-rich...Denver, CO 80225 (303) 236-2443 David W. Beaty Chevron Oil Field Research Co. P.O. Box 446 La Habra. CA |  | | Journal (issue) | | Ankangite, Ba(Ti, y +3 ,Cr+3 ) 8 O 16 , tet., black, Cryptomelane group Anorthite, C'½A12Si2 O8 , tric., t1imorph...is a related mineral"; after Ti, insert U 233 Cryptomelane Group, in the list of A elements, add Mn+4 ;...liberally accompany the clean, bright, blocky chevron epidote twins characteristic of this famous locality;...Windisch 30 Van Wouw Street Groenkloof, Pretoria Belgium Paul Van Hee Marialei 43 B-2900 Schoten Canada |  | | Book (edition) | | record for U. S. and third this for the Cryptomelane: W. E. Richmond and M. Fleischer (new species)...Copper: (1) Fierro-Hanover district (Grant). Cryptomelane: (1) near Deming (Luna). Georgetown Descloizite:...districts. Cristobalite.— At several localities. Cryptomelane.— Type material for this new species, described...Jr. (1953, unpublished thesis)— new record. CRYPTOMELANE Essentially manganese oxide, K(Mn 4 ,Mn 2...pyrolusite. H Opaque. Next to pyrolusite, cryptomelane is the most Much many material called "psilomelane" |  | | Journal (article/letter/editorial) | | folding. Many specimens exhibit crenulation or chevron folding of the S~ foliation, and in a few cases...Mineralisation. Numerous Mn deposits, comprising cryptomelane or braunite, or both, with minor psilomelane...chalcocite cerargyritc coffinite chlorite cinnabar cryptomelane chalcopyrite chromite Cu; in veins, breccia | | | Journal (issue) | | Ankangite, B a(T i,V +3,C r+3)80 16, tet., black, Cryptomelane group Anorthite, Ca2A l2Si20 8, trie., trimorph...is a related m ineral” ; after Ti, insert U Cryptomelane Group, in the list of A elements, add M n+4;...liberally accompany the clean, bright, blocky chevron epidote twins characteristic of this famous locality;...Windisch 30 Van Wouw Street Groenkloof, Pretoria Belgium Paul Van Hee Marialei 43 B-2900 Schoten Canada |  | | Report (issue) | | poikilitically encloses STAUROLITE quartz, and cuts chevron folding of the micas (fig. 31). The development...related to a large fault zone. Manganese minerals. Cryptomelane, polianite, psilomelane, pyrolusite, and manganite..._________________ 10,48,71 Corundum ----_---_------_ 47 Cryptomelane .._ __-_. 47 Cummingtonite ______.. 10,12,40 |  | | Report (issue) | | crude ore was shipped to a Luzenac mill in Ghent, Belgium for European chlorite customers. Four grades of...oxide minerals at Spor Mountain, pyrolusite and cryptomelane are common; psilomelane, chalcophanite, and...of Boise, Idaho, purchased this operation from Chevron Chemicals in 1992. In 1998, SF Phosphates mined...recover the following amounts of elemental sulfur: Chevron - 13 stpd (12 mtpd) (Jim Palmieri, verbal communication...in secondary minerals, such as pyrolusite and cryptomelane, is in a quadrivalent state. Virtually all manganese |  | | Book | | bench – 423 m RL (b) Iron ore in the core of a chevron fold Block, bench – 550 m RL; (c) Hard ore intimately...ore zone. (a-h). Field photographs showing (a) Chevron folded BHQ (top left) changing over to Banded hematite...ore minerals comprise pyrolusite, psilomelane, cryptomelane, jacobsite, ramsdellite, manganite, , 3–4% Al2...are circular clay-like material. Nsutite and cryptomelane are present in ooliths and pisoliths, whereas...the cement contains todorokite in addition to cryptomelane. These ores, as a rule, analyse about 45% (Mn |
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