 | | Journal (article/letter/editorial) | | GEOCHEMISTRY OF CARBONATE SEDIMENTS FROM LAKE KIVU (EAST-CENTRAL AFRICA) R. B O T Z 1, P. S T O F F E R S '...geochemistry of carbonate sediments from Lake Kivu {East-Central Africa). Chem. Geol., 69: 299-308. Isotopic...Isotopic investigations of carbonates from Lake Kivu show that most of the carbonate in the main basin is precipitated...precipitated in isotopic equilibrium with the lake water bicarbonate (near isotopic equilibrium with...when the Bukavu basin was isolated from the main lake and its waters were "chemically" stratified. 1 |  | | Journal (article/letter/editorial) | | structure of monohydrocalcite and the phase composition of the beachrock deposits of Lake Butler and Lake Fellmongery...was observed, although all samples possessed monohydrocalcite, calcite, aragonite, and magnesiancalcite...The Rietveld refinement of the structure of monohydrocalcite showed significant changes in the orientation...and one bifurcated hydrogen bond. Keywords: Monohydrocalcite, carbonate minerals, magnesian-calcite, powder...powder diffraction Introduction Monohydrocalcite (CaCO3·H2O), formerly also known by the discredited |  | | Journal (article/letter/editorial) | | Transformation and Petrological kinetics of monohydrocalcite Sciences, Volumeto103�� ����� aragonite ,...2008 345 LETTER Transformation kinetics of monohydrocalcite to aragonite in aqueous solutions Takashi...machi, Kanazawa 920 1192, Japan - - - - Monohydrocalcite (CaCO3·H2O; MHC) is a rare mineral in geological...metastability quantitatively. In the present study, monohydrocalcite transformed to aragonite with time. There...rate limiting steps in the transformation of monohydrocalcite to aragonite: the nucleation and crystal growth |  | | Journal (article/letter/editorial) | | 冷 泉 石 灰 華 に産 す る monohydrocalcite(CaCO3・H2O)の The occurrence of monohydrocalcite of cold spring ... 伊 Monohydrocalcite precipitated pH=6.67 and cold Fe2+0.013Mg0.005(Na2)0.003) new to this ray...known a hexagonal prominent. め of are Monohydrocalcite, Cold crystal, and X-ray saline diffraction...et 質 環 境 で のmonohydroca1 Tsvetkov,1959)。 monohydrocalciteと 告 は,鹹 1959; の と し て Taylor, 物 名 は付 こ...報 告 さ れ て い る(Marschner, 上 述 の よ うに これ ま でmonohydrocalciteが 1969)。 報告 さ れ て い る環境 は 水 の流 れ の ほ とん ど |  | | Journal (article/letter/editorial) | | elsevier.com/locate/gca Formation condition of monohydrocalcite from CaCl2–MgCl2–Na2CO3 solutions Risa Nishiyama...available online 14 September 2012 Abstract Monohydrocalcite (MHC: CaCO3H2O) is a rare mineral in geological...Ltd. All rights reserved. 1. INTRODUCTION Monohydrocalcite (MHC), hydrated calcium carbonate, with composition...sediments of Lake Hovsgol in Mongolia, which is the second largest inland freshwater lake in Mongolia...Mongolia (Solotchina et al., 2009). Lake Hovsgol is extremely sensitive to fluctuations of solar insolation that |  | Mikuš, Tomáš, Patúš, Martin, Luptáková, Jarmila, Bancík, Tomáš, Biroň, Adrián (2017) Mineralogická charakteristika asociácie sekundárnych karbonátov vápnika zo Španej Doliny - prvý nález monohydrokalcitu z rudných ložísk na území Slovenska [Mineralogical characteristics of the secondary calcium carbonates association from the Špania Dolina - The first occurrence of monohydrocalcite in ore deposits in Slovakia]. Bulletin Mineralogie Petrologie, 25 (2) 318-326 | Journal (article/letter/editorial) | | the Špania Dolina - The first occurrence of monohydrocalcite in ore deposits in Slovakia Tomáš Mikuš1)*...Petrolog 25(2): 318-326 ISSN 2570-7337 Abstract Monohydrocalcite (MHC) is considered to be rare mineral in...mater during MHC crystallization. Key words: monohydrocalcite, secondary minerals, Špania Dolina, Piesky...sedimentov (Sapozhnikov, Tsvetkov 1959), neskôr z jazera Kivu v Afrike (Stoffers, Fischbeck 1974) a z pobrežných...Bratislava 76110, 1-336 Dahl K, Buchardt B (2006) Monohydrocalcite in the arctic Ikka fjord, SW Greenland: first |  | Rodriguez-Blanco, Juan Diego, Shaw, Samuel, Bots, Pieter, Roncal-Herrero, Teresa, Benning, Liane G. (2014) The role of Mg in the crystallization of monohydrocalcite. Geochimica et Cosmochimica Acta, 127. 204-220 doi:10.1016/j.gca.2013.11.034 | Journal (article/letter/editorial) | | The role of Mg in the crystallization of monohydrocalcite Juan Diego Rodriguez-Blanco a,b, Samuel Shaw...available online 6 December 2013 Abstract Monohydrocalcite is a member of the carbonate family which...assessed the mechanism of crystallization of monohydrocalcite through in situ synchrotron-based small and...spectroscopic, microscopic and wet chemical analyses. Monohydrocalcite crystallizes via a 4-stage process beginning...precipitates. This precursor crystallizes to monohydrocalcite via a nucleationcontrolled reaction in stage |  | | Report (issue) | | Monohydrocalcite CaCO3 • H2 O c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Hexagonal...084(4) c = 7.542(7) Z=3 X-ray Powder Pattern: Lake Issyk-Kol, Kyrgyzstan. 2.17 (10), 1.926 (10), 4...25 100.00 (1) Lake Issyk-Kol, Kyrgyzstan; corresponds to CaCO3 • 0.65H2 O. (2) Lake Fellmongery, Australia;...• H2 O. Occurrence: In lake-bed sediments and as tuffaceous deposits on lake margins, formed by precipitation...Distribution: From Lake Issyk-Kol, Kyrgyzstan. At Lakes Maibalyk and Teke, Kazakhstan. From Lake Kivu, on the Congo |  | Fukushi, Keisuke, Suzuki, Yuma, Kawano, Jun, Ohno, Takeshi, Ogawa, Masahiro, Yaji, Toyonari, Takahashi, Yoshio (2017) Speciation of magnesium in monohydrocalcite: XANES, ab initio and geochemical modeling. Geochimica et Cosmochimica Acta, 213. 457-474 doi:10.1016/j.gca.2017.06.040 | Journal (article/letter/editorial) | | Accepted Manuscript Speciation of Magnesium in monohydrocalcite: XANES, ab initio and geo‐ chemical modeling...Takahashi, Y., Speciation of Magnesium in monohydrocalcite: XANES, ab initio and geochemical modeling...22 June, 2017 Speciation of Magnesium in monohydrocalcite: XANES, ab initio and geochemical modeling...fax number: +81-76-264-6545 1 ABSTRACT Monohydrocalcite (MHC: CaCO3·H2O), a rare carbonate mineral... 1. INTRODUCTION Formations of metastable monohydrocalcite (MHC), are observed most frequently in saline |  | Lin, Chin Yik, Turchyn, Alexandra V., Steiner, Zvi, Bots, Pieter, Lampronti, Giulio I., Tosca, Nicholas J. (2018) The role of microbial sulfate reduction in calcium carbonate polymorph selection. Geochimica et Cosmochimica Acta, 237. 184-204 doi:10.1016/j.gca.2018.06.019 | Journal (article/letter/editorial) | | where the Mg/Ca is greater than 2, crystalline monohydrocalcite (MHC) is the primary carbonate mineral produced...solution chemistry upon nucleation. 1 Keywords: monohydrocalcite; Mg/Ca, seeding material, phosphate, transformation...metastable (e.g. amorphous calcium carbonate or monohydrocalcite (MHC)), it will transform to calcite or aragonite...gold or carbon prior to SEM analysis. 2.6 Monohydrocalcite transformation experiment To investigate...investigate the transformation and stability of monohydrocalcite initially formed in some experiments, we subjected |  | | Journal (article/letter/editorial) | | polymorphs of MgC2O4·2H2O including glushinskite, monohydrocalcite (CaCO3·H2O), calcite, vaterite, and several...saguaro skin, inside of which nesquehonite and monohydrocalcite crystallize. Lansfordite and nesquehonite...weddellite and its transformation product monohydrocalcite. This sand lithifies to porous spongelike...decay. This monohydrocalcite further alters to calcite. The d13CVPDB of the monohydrocalcite and calcite...lansfordite (MgCO3·5H2O), nesquehonite (MgCO3·3H2O), monohydrocalcite (CaCO3·H2O), two unidentified Mg-C-O-H-bearing |  | | Journal (article/letter/editorial) | | polymorphs of MgC2O4·2H2O including glushinskite, monohydrocalcite (CaCO3·H2O), calcite, vaterite, and several...saguaro skin, inside of which nesquehonite and monohydrocalcite crystallize. Lansfordite and nesquehonite...weddellite and its transformation product monohydrocalcite. This sand lithifies to porous spongelike...decay. This monohydrocalcite further alters to calcite. The d13CVPDB of the monohydrocalcite and calcite...lansfordite (MgCO3·5H2O), nesquehonite (MgCO3·3H2O), monohydrocalcite (CaCO3·H2O), two unidentified Mg-C-O-H-bearing |  | | Journal (article/letter/editorial) | | sulfate; molybdate; calcite; aragonite; vaterite; monohydrocalcite; -p ikaite re Abstract lP Marked increases...polymorphs (calcite, aragonite, vaterite, monohydrocalcite and ikaite). Among the different polymorphs...tree-rings (McCarroll and Loader, 2004) and marine and lake sediments (Lowe, 2011; Voelker, 2002). During the...calcite and/or aragonite (Lacelle et al., 2009). Monohydrocalcite CaCO3·H2O, (MHC), is a rare hydrous phase... 2. na aragonite, vaterite, ikaite and monohydrocalcite (MHC). Computational Methods Jo ur Calcium |  | Blue, C.R., Giuffre, A., Mergelsberg, S., Han, N., De Yoreo, J.J., Dove, P.M. (2017) Chemical and physical controls on the transformation of amorphous calcium carbonate into crystalline CaCO3 polymorphs. Geochimica et Cosmochimica Acta, 196. 179-196 doi:10.1016/j.gca.2016.09.004 | Journal (article/letter/editorial) | | from ACC and supports the previous claim that monohydrocalcite may be an important, but overlooked, transient... and vaterite) or the hydrated polymorph, monohydrocalcite. Examples include sea urchin 12 spicules...polymorphs and reiterate the importance of monohydrocalcite 62 as another potentially important metastable...vaterite) and one hydrated polymorph of CaCO3 (monohydrocalcite: 149 CaCO31H2O). Representative images...exhibits clusters of needles (Fig. 2D), whereas monohydrocalcite generally assumes the twisted, 198 branching |  | Stockmann, Gabrielle J., Seaman, Paul, Balic-Zunic, Tonci, Peternell, Mark, Sturkell, Erik, Liljebladh, Bengt, Gyllencreutz, Richard (2022) Mineral Changes to the Tufa Columns of Ikka Fjord, SW Greenland. Minerals, 12 (11) 1430 doi:10.3390/min12111430 | Journal (article/letter/editorial) | | consist of the less hydrated carbonate minerals, monohydrocalcite (CaCO3 ·H2 O), aragonite, and calcite (CaCO3...of the columns has completely altered into monohydrocalcite, whereas the other columns have crusts of...of ikaite and cores of monohydrocalcite ± aragonite and calcite. This change is interpreted as a dehydration...reaction and mineral alteration from ikaite to monohydrocalcite continuing to aragonite ± calcite in response...Ikka Fjord will change mineralogy into mainly monohydrocalcite. Publisher’s Note: MDPI stays neutral with |  | Han, Zuozhen, Yu, Wenwen, Zhao, Hui, Zhao, Yanhong, Tucker, Maurice, Yan, Huaxiao (2018) The Significant Roles of Mg/Ca Ratio, Cl− and SO42− in Carbonate Mineral Precipitation by the Halophile Staphylococcus epidermis Y2. Minerals, 8 (12) 594 doi:10.3390/min8120594 | Journal (article/letter/editorial) | | carbonic anhydrase. The crystal cell density of monohydrocalcite is lower in a magnesium chloride medium, compared...currently widely distributed in marine shoreline and lake environments [1–4]. Biomineralization research has...precipitating magnesium calcite, aragonite, and monohydrocalcite, and the latter bacteria calcite, aragonite...halophilic bacterium Halomonas marina from Qinghai Lake sediments and precipitated dolomite in low-salinity...was calcite at a Mg/Ca molar ratio of 0, and monohydrocalcite at Mg/Ca molar ratios of 2, 4, 6, and 8. The |  | Pan, , Zhao, , Tucker, , Zhou, , Jiang, , Wang, , Zhao, , Sun, , Han, , Yan, (2019) Biomineralization of Monohydrocalcite Induced by the Halophile Halomonas smyrnensis WMS‐3. Minerals, 9 (10) 632 doi:10.3390/min9100632 | Journal (article/letter/editorial) | | minerals Article Biomineralization of Monohydrocalcite Induced by the Halophile Halomonas Smyrnensis...bacterium Halomonas smyrnensis from a modern salt lake used in experiments to induce biomineralization...biomineralization has resulted in the precipitation of monohydrocalcite and other carbonate minerals. In this study, a...mediums with 3% NaCl concentration to induce monohydrocalcite at different Mg/Ca molar ratios of 0, 2, 5...mechanism. Moreover, the nucleation mechanism of monohydrocalcite on extracellular polymeric substances (EPS) |  | | Book | | evaporation, seepage and spillover). Changes in lake temperature or chemistry often, though not always...indicate changes in magma degassing; changes in lake level can indicate strain of the edifice; and bubbling...primordial soup of extremophile organisms. Every volcanic lake, from acidic to alkaline, has its own story to tell.... . . . . V. Manville 21 Mechanisms of Crater Lake Breaching Eruptions . . . . . . . . . . . Dmitri...Lakes. . . Johan C. Varekamp 93 Gases in Volcanic Lake Environments . . . . . . . . . . . . . . . . . |  | McCormack, Jeremy, Nehrke, Gernot, Jöns, Niels, Immenhauser, Adrian, Kwiecien, Ola (2019) Refining the interpretation of lacustrine carbonate isotope records: Implications of a mineralogy-specific Lake Van case study. Chemical Geology, 513. 167-183 doi:10.1016/j.chemgeo.2019.03.014 | Journal (article/letter/editorial) | | isotope records: Implications of a mineralogy-specific Lake Van case study Jeremy McCormack, Gernot Nehrke...isotope records: Implications of a mineralogyspecific Lake Van case study, Chemical Geology, https://doi.org/10...isotope records: Implications of a mineralogy-specific Lake Van case study Jeremy McCormacka*, Gernot Nehrkeb...palaeoclimatology. In case of the terminal and alkaline Lake Van, however, previous studies have shown that bulk...the timing and site of carbonate precipitation in Lake Van are inconsistent. This study provides evidence |  | | Book (edition) | | The former Kivu province is now divided to three regions: INTRODUCTION Nord-Kivu, Sud-Kivu, and Maniema...South America and Greenland, then Europe, Asia, Africa, Australia, and Antarctica), then those of pegmatitic...California, in fine crystals in talc near Wenatchee Lake, Chelan co., Washington, also at Sulzer, Prince... At MajubaHill.Pershingco.. Nevada.In Sheffield Lake complex, near Kipawa River massif, crystalsto 3...mine, Kuruman Mn Field: North Cape prov., South Africa. Also in slags. NJbMA 139. 1980. . . Akhtaragdite |  | | Book (edition) | | Meta/lurgical and Mineralogical Society o/ South Africa Journal of Chemical Phy ics Journal cif the Chemical...(Oll) 1(H 2 O) 1,. tric., Kobokobo. near Kamituga, Kivu, Democratic Republic ofCongo. 73. 189-190. B.\f...Mn)Sip1, orth., comparc Barylite.Mt. Nyiragongo,Kivu Province,Congo,59, 381, 73, 608---012 (str.) Andrositc-(La)...a series with Ferro-anthophyllite, Kjenncrudvann Lake, near Kongsberg. Norway. MR 29. 169-174, ZK 188...h(OH). mon., prospectina trench, Scagull and Lcckic Lake . 50 km w t of ipigon, Thunder Bay district, Ontario |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | Sinica Annals of the Geological Survey of South Africa Australian Journal of Chemistry American Journal...Israel, Current Research Geological Survey of South Africa Bulletin Geology Today Geologicheskii Zhurnal C...the fossil placers of the Witwatersrand in South Africa, have produced most of the world’s gold. Localities:...Bow, Madison, and Broadwater Cos., MT; Leadville, Lake Co., Breckenridge(*), Summit Co., Ground Hog mine(*)...Telluride, San Juan Co., CO; Bingham and Tintic, Salt Lake Co., UT; Mohave and Cochise Cos., AZ; Elmore, Idaho |  | | Book (edition) | | Ethiopia as applicable. UF Danakil UF Dankalia BT Africa Djibouti Ethiopia Afar Depression methods. Also...Darya Badakhshan Hindu Kush Murgab Basin Turkestan Africa Includes use on level 1 or 2 as an area term (list...Islands NA Central Africa NT Chad Basin NT Congo Basin NT Congo River NA East Africa NT East African...Kalahari Desert NT Kasai River NT NT NT NT NT Lake Chad Lebombo Mountains Libyan Desert Limpopo Basin...Valley Nile River Nile Valley Nimba Mountains North Africa Nubia Nubian Shield Orange River Red Sea Hills |  | | Book (edition) | | present-day lakes, 84 4.3 Properties of lake water, 84 4.4 Kinetics of lake water, 85 4.4.1 Surface waves, 85...in lakes, 87 4.4.3 Seiches, 87 4.5 Chemistry of lake waters, 88 4.6 Clastic 4.6.1 4.6.2 4.6.3 4.7...100 4.8 Rhythmites, 100 4.9 Lake-level changes, 102 4.10 Ancient lake deposits, 104 VI ............•••••••••••••••••••••• 4.10.1 Criteria for recognition of ancient lake deposits, 105 4.10.2 Ancient lacustrine facies,...northeasr Britain, 113 1t'-4.14 4.14.1 Evaporitic lake basins, 114 The Green River Formation (Palaeogene) |  | | Book | | Precambrian Transvaal Dolomite of NE-Transvaal, South Africa. R. Forster and H. Wachendorf. With 1 Figure and...(Precambrian) of the Barberton Mountain Land (South Africa). Rev. Palaeobot. Palynol. 5, 9—29 (1967). Schopf...stromatolites have also been reported in North Africa Paleozoic limestone (Bertrand-Sarfati, 1976). Finally...J.M.: The water biscuit of Squaw Id. Canandaigua Lake, N.Y. Bull. New York State Mus. 39, 8, Albany (1900)...: Stromatolites in the Denault Formation, Marion Lake, Coast of Labra¬ dor, Newfoundland. Geol. Surv. |
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