 | | Journal (article/letter/editorial) | | various locations in the Baltic Proper (Carman and Rahm, 1997) and the enhanced dissolved phosphate release...März et al. (2008), or a post-sampling artefact of pyrite oxidation as suggested by Kraal et al. (2009),...(H2S) and burial of Fe and S as Femonosulfide and pyrite. In the anoxic, non-sulfidic Bornholm basin, Fe...saturation state calculations for porewater (Carman and Rahm, 1997). Further research is needed to identify the...with respect to authigenic Ca–P (e.g. Carman and Rahm, 1997). In long-term experiments with Baltic Sea |  | | Journal (article/letter/editorial) | | rhodochrosite precipitation at the sediment surface. Pyrite in the brackish water sediments formed at or above...al., 1981; Burdige and Gieskes, 1983; Carman and Rahm, 1996). As Mn in most natural waters and sediments...pyritization (DOP) (Raiswell et al., 19881, which compares pyrite-Fe to HCl-reactive Fe. When a large fraction of...of the iron sulfides is FeS rather than pyrite, the more general term degree of sulfidization (DOS) should...slowly and DOP may therefore increase with time. Pyrite is thermodynamically the most stable crystal form |  | | Book | | isometric crystals form cubes. The mineral pyrite is isometric. Pyrite is commonly called fool’s gold. This...the way minerals reflect light. Minerals such as pyrite shine like metal. Others are described as glassy...orthorhombic - awr-thuh-RAHM-bihk porcelain - PAWR-suh-luhn pyrrhotite - PIHR-uh-tite rhombus - RAHM-buhs sapphire... 28 32 J jadeite 9 L luster 18 P platinum 23 pyrite 8, 18 pyrrhotite 24 Q quartz 20, 21, 27 S sedimentary |  | Martin, Andrew J., McDonald, Iain, MacLeod, Christopher J., Prichard, Hazel M., McFall, Katie (2018) Extreme enrichment of selenium in the Apliki Cyprus-type VMS deposit, Troodos, Cyprus. Mineralogical Magazine, 82 (3) 697-724 doi:10.1180/mgm.2018.81 | Journal (article/letter/editorial) | | containing euhedral pyrite and chalcopyrite, contain up to 4953 and 3956 ppm Se in pyrite and chalcopyrite...identified at Apliki and different generations of pyrite are distinguishable using trace element chemistry...analysed via LA-ICP-MS. Results indicate stage I pyrite formed under reduced conditions at high temperatures...contains 182 ppm (n=22 σ=253) Se. Late stage III pyrite which is euhedral and overprints chalcopyrite and...probable magmatic component for late stage III pyrite which is suggested as a mechanism explaining the |  | | Journal (article/letter/editorial) | | Red Ledge chromite mine in the Washington mining district of Nevada Co., Calif. It consists of small, brilliant...Branchville (Conn.) Mica rocks contain sphalerite, pyrite, gold, mine. It seems to have a look of abandsilver...finally secured a lease to the Rock Landing No. 2 quarry in Haddam Neck, Middlesex Co., Connecticut. Also...work on properties on Squaw Creek, Mineral Hill District, Lemhi County, Idaho. It is reported they are...after Columbite and Tantalite; this is in the same District the ROCKS AND MINERALS Downloaded by [JAMES |  | | Book | | minerals: halite, fluorite, garnets, magnetite, pyrite, galena, sphalerite, tetrahedrite, cuprite, and...however, chemically both are calcium carbonates. Pyrite is cubic, marcasite orthorhombic, but both are...exampies include the pseudomorphs of limonite after pyrite or siderite, of malachite after native copper,...after azurite, of quartz after barytes, and of pyrite after calcite. If the chernical composition of...include aragonite into calcite, marcasite into pyrite, 13 and occasionally diamond into graphite (never | | | Book | | minerals: halite, fluorite, garnets, magnetite, pyrite, galena, sphalerite, tetrahedrite, cuprite, and...however, chemically both are calcium carbonates. Pyrite is cubic, marcasite orthorhombic, but both are...examples include the pseudomorphs of limonite after pyrite or siderite, of malachite after native copper,...after azurite, of quartz after barytes, and of pyrite after calcite. If the chemical composition of a...include aragonite into calcite, marcasite into pyrite, 13 and occasionally diamond into graphite (never |  | | Book | | include cassiterite, rutile, scheelite, chalco- pyrite, and vesuvianite. Hexagonal system The axial cross...minerals: halite, fluorite, garnets, magnetite, pyrite, galena, sphalerite, tetrahedrite, cuprite, and...however, chemically both are calcium carbonates. Pyrite is cubic, marcasite orthorhombic, but both are...examples include the pseudomorphs of limonite after pyrite or siderite, of malachite after native copper,...after azurite, of quartz after barytes, and of pyrite after calcite. If the chemical composition of a |  | Yang, Sen, Liu, Danqing, Yang, Zhe, Wang, Changxiang, Chen, Xiaohong, Li, Hai, Li, Quan, Yang, Baoguo, Li, Yilian (2021) Occurrence and mobility of trace elements during oxidant stimulation of shales in Yichang, Hubei province of China. Applied Geochemistry, 127. 104913pp. doi:10.1016/j.apgeochem.2021.104913 | Journal (article/letter/editorial) | | mobility of TEs as well. The carbonate minerals and pyrite were both critical minerals for decreasing the...incorporation of TEs. Meanwhile, sulfate generated from pyrite oxidation and persulfate hydrolysis also directly...interactions between oxidant and shale components (e.g., pyrite, organic matter, chlorite, calcite, dolomite)...and Pb in fracturing fluids was mainly related to pyrite oxidation, while the release of U mainly came from...process of oxidant stimulation, obvious oxidation of pyrite and organic matter, and dissolution and precipitation |  | | Journal (article/letter/editorial) | | are in good agreement with data from Carman and Rahm (1997), who studied the pore water compositions...sulfate reduction (Boesen and Postma, 1988; Carman and Rahm, 1997; Sternbeck and Sohlenius, 1997) and is reflected...sulfate reduction (Boesen and Postma, 1988; Carman and Rahm, 1997; Sternbeck and Sohlenius, 1997). This process...Acta 64, 2775–2778. Boesen C. and Postma D. (1988) Pyrite formation in anoxic environments of the Baltic...Geochim. Cosmochim. Acta 57, 3867–3883. Carman R. and Rahm L. (1997) Early diagenesis and chemical characteristics |  | | Report (chapter) | | as dolomite and calcite, but are also present in pyrite, chlorite and micas. Most small pores (mesopores...have very similar X-ray attenuation values, but pyrite and carbon (in organic matter) have distinct attenuation...non-clay-grain laminations (carbonate, quartz, pyrite) in carbonate alternate (Charpentier et al. 2001)...dark areas are silty laminations, bright areas are pyrite (Josh et al. 2012). Core-scale XCT imaging of...bedding show clear dark silty laminations and light pyrite (Josh et al. 2012) (Fig. 7c, d). Fractures. Fractures |  | | Report (chapter) | | Roxbury assemblage. Sayles (1914), Dott (1961), Rahm (1962) and Socci & Smith (1987) have noted that...These fossils are preserved as petrifactions in pyrite interspersed within organic laminae (Lenk et al...Sedimentary Rocks. Harper & Brothers, New York. Rahm, D. A. 1962. Geology of the main drainage tunnel |  | MONGELLI, GIOVANNI, CRITELLI, SALVATORE, DINELLI, ENRICO, PATERNOSTER, MICHELE, PERRI, FRANCESCO (2010) Mn- and Fe-carbonate rich layers in Meso-Cenozoic shales as proxies of environmental conditions: A case study from the southern Apennine, Italy. GEOCHEMICAL JOURNAL, 44 (3) 211-223 doi:10.2343/geochemj.1.0064 | Journal (article/letter/editorial) | | rhodochrosite and pyrite, and only in the absence of sulphate ions siderite forms (Carman and Rahm, 1997). Both...black shales. Econ. Geol. 91, 36–46. Carman, R. and Rahm, L. (1997) Early diagenesis and chemical characteristics...Pagano, R. (2001) The Val Graveglia manganese district, Liguria, Italy. Mineral. Rec. 32, 349–379. Maynard |  | | Book | | Germany, France, Italy, Spain, Portugal, Belgium, Austria, the Soviet Union, Poland, Hungary, Czechoslovakia...Russia. stephanite, Archduke Victor Stephan, of Austria. uvarovite, Count S. S. Uvarov, of Russia. WOMEN'S...Azores. gamagarite, Gamagara ridge, Postmasburg district, South Africa. garronite, Garron plateau area...from Variscia, an ancient name of the Voigtland district of Ger¬ many, where the mineral was first found...from the herb galax, which is abundant in the district of North Carolina where the mineral was discovered |  | | Journal (article/letter/editorial) | | conversion of CFA to Fe-oxyhydroxide-bound P due to pyrite oxidation upon oxygen exposure (Kraal et al., 2009)...availability of Fe, P and S. The precipitation of pyrite (FeS2) is favored over that of vivianite in sulfidic...in most cases of microenvironment sulfidization, pyrite would be expected to form as the dominant authigenic...suggested previously for Baltic sediments by Carman and Rahm (1997) and Heiser et al. (2001). Background Acetate-P...Piper, A. Klaus and L. C. Peterson). Carman R. and Rahm L. (1997) Early diagenesis and chemical characteristics |  | | Journal (article/letter/editorial) | | base: ∼1 cm cream-white basal bentonite layer (‘Rahm’). was estimated using a reference intensity ratio...(T) in the Gabelsberg deposit (GB07, 08, 10). (b) Pyrite from bluish bentonite beds in the Rehbach deposit...yellow bentonite. Blue bentonites commonly contain pyrite (Fig. 4b) and appear either homogeneous or laminated...kaolinite, chlorite, quartz, feldspar, volcanic glass, pyrite, goethite and hematite. Oriented, air-dried and...non-stoichiometric composition, and the presence of framboidal pyrite in bluish bentonite (Figs 2 and 4b; Ulbig, 1994) |  | | Journal (issue) | | Metaliferi Mts. 15 4. Baia Mare metallogenic district 64 5. Other sources of native gold from Romania...unit. For instance, in BradSăcărâmb metallogenic district, the Au:Ag ratio is relatively uniform (45% to...metallogenic criterion: province, subprovince, district, sector, field/ node (Fig. 2) . 7 Fig. 1. Example...relevant metallogenic units (node, field, sector, district) were made. For samples sourced abroad, a summary...attached to the native gold samples from RoşiaBucium district; general and mineralogical characterization 9 |  | | Journal (issue) | | OCK -TH ON 2022 RMAG FIELD TRIPS CEMEX Niobrara Quarry Virtual Tour | April 7, 3:30pm (MDT) | Online Trip...Florissant Fossil Beds National Monument & Clare Quarry Fossil Collecting | August, Date TBD | Florissant...website for the full lineup. The next event is CEMEX Quarry Niobrara Virtual Trip on April 7th. Finally, Diversity...National Monument and a fossil dig at a nearby quarry • Raft the San Juan River on a three-day float...Leadville area on a bike tour of this historic mining district • Consider applications to exploration and development |  | Lenz, Conny, Behrends, Thilo, Jilbert, Tom, Silveira, Miguel, Slomp, Caroline P. (2014) Redox-dependent changes in manganese speciation in Baltic Sea sediments from the Holocene Thermal Maximum: An EXAFS, XANES and LA-ICP-MS study. Chemical Geology, 370. 49-57 doi:10.1016/j.chemgeo.2014.01.013 | Journal (article/letter/editorial) | | high Mo interval, Mn is associated with framboidal pyrite. Mn/Fe ratios in the sulfidic interval vary between...exceeds ratios previously reported for sedimentary pyrite and EXAFS spectra indicate that sulfide bound Mn...in other Fe–S phases such as mackinawite besides pyrite. There is also evidence for the presence of a low...laminated part of the blocks seems to be framboidal pyrite. Scanning electron micrographs show layers enriched...which is typical for the morphology of framboidal pyrite (Wilkin and Barnes, 1997). This interpretation |  | | Report (issue) | | (before present) were reported by Easterbrook and Rahm (1970, p. 20). The present cone is also younger...apparent in the detection of moderately abundant pyrite and magnetite in many samples. The determined abundance...primarily cristobalite, quartz, alunite, sulfur, and pyrite with lesser amounts of kaolinite, tridymite, jarosite...silica phase (opal, tridymite, or cristobalite), pyrite, and scoria or lithic fragments, with lesser sulfur...although Babcock and Wilcox (1977, p. 25) found that pyrite decreased in the coarser fractions. E12 VOLCANIC |  | | Book | | (Billings and Tierney, 196^), and Main Drainage Tunnel (Rahm, 1962). 318 minor faults were recorded (Billings...thrust was exposed in the Maiden Tunnel (Billings and Rahm, 1966), where it is knife sharp, with no breccia...geology and observations in the In an abandoned quarry at the tunnel indicate a large fault. corner of...conglomerate was formerly ex- 42 posed in sin abandoned quarry, Sayles (Billings, 1929) considered this to be...Basin: Geol. Soc, Am., Mem, 146. Billings, M.P. and Rahm, D.A. , 1966, Geology of the Maiden Tunnel, Massachusetts: |  | | Journal (article/letter/editorial) | | 1998). The CRS fraction is assumed to represent pyrite (FeS2). Both solutions were purged with N2 prior...Lepidocrosite Ferrihydrite with co-precipitated PO4 Pyrite Mn Hureaulite MnPO4 P Vivianite Carbonate fluorapatite...Burton et al. (2008), are iron monosulfides (FeS) and pyrite (FeS2). In the upper 30 m of the sediments, the...Deep, as suggested in earlier studies (Carman and Rahm, 1997; Jilbert and Slomp, 2013a; Mort et al., 2010;...west-central Baltic Sea: evidence from stable isotopes and pyrite textures. J. Mar. Syst. 25, 299–312. http://dx |  | | Book | | the upper oxidation zone, sulphur compounds (eg pyrite, chalcopyrite, galena and sphalerite) c.:hange...mineral appear in some minerals, such as yellow pyrite which produces a greenish-black streak, grey galena...powder form or in thin sections, eg magnetite or pyrite. In granular aggregates transparent minerals become...a hammer blow, while brittle minerals, such as pyrite and quartz, crumble into small fragments when struck...(eg quartz or opal); - uneven (eg arsenopyrite or pyrite); - hackly (eg silver, gold or acanthite); - splintery | | | Book | | the upper oxidation zone, sulphur compounds (eg pyrite, chalcopyrite, galena and sphalerite) change into...mineral appear in some minerals, such as yellow pyrite which produces a greenish-black streak, grey galena...powder form or in thin sections, eg magnetite or pyrite. In granular aggregates transparent minerals become...a hammer blow, while brittle minerals, such as pyrite and quartz, crumble into small fragments when struck...(eg quartz or opal); — uneven (eg arsenopyrite or pyrite); — hackly (eg silver, gold or acanthite); — splintery |  | Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York. | Book (volume) | | polyhalite, celestite, dolomite, quartz, hematite, and pyrite have been found as pseudomorphs after halite; the...100. Found at several mines in the Huantajaya district, calcite, embolite, cerargyrite, bromyrite, iodyrite...as at Caracoles in Antofagasta, the Huantajaya district in Tarapaca, and especially Chanarcillo in Atacama;...Obtained in notable amounts in the Broken Hill district. New South Wales (bromian pt.). In the United...Tombstone, Cochise County, Arizona; in the Rand district and in the Calico and Barstow mines, San Bernardino |
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