 | | Report (issue) | | rock called magnesite (MgCO3). The CO2 gas is then permanently “locked up” in the magnesite as a solid...solid. Magnesite is a stable g y issues such as acid drainage, g , and it would require q no mineral at the...England, Vermont and Maine. Smaller ultramafic outcrops exist in the interior of the United States in...that met these criteria are peridotite, dunite, serpentinite and picrite (a rare olivine-rich volcanic basalt)...various types of peridotite (an igneous rock) and serpentinite (its altered metamorphic equivalent). Peridotites |  | | Journal (article/letter/editorial) | | Mineralogy, and Geochemistry of the Nkamouna Serpentinite: Implications for the Formation of the Cobalt-Manganese...laterite and a lower in situ serpentinite-derived laterite. The serpentinite is massive with a nonpseudomorphic...genetically related phases: Serpentinite-I and Serpentinite-II. Serpentinite-I is characterized by antigorite...ferritchromite, and magnesite, and Serpentinite-II by antigorite and magnesite. Both serpentinite types are extremely...extremely low in sulfides. Serpentinite-I is the dominant and oldest phase and was derived from a subcontinental |  | | Report (issue) | | associated minerals, the most common of which are magnesite and chlorite. Talc deposits occur in a metamorphic...significance in the United Kingdom is situated. A talc-magnesite deposit occurs at Curiningsburgh on the Mainland...per cent talc, the main accessory mineral being magnesite. The whole of the production is sold to Yate Mills...chlorites, tremolite - actinolite·, anthophyllite, magnesite, dolomite, calcite and quartz. Such remnant magnesium...most common accessory minerals present being magnesite and chlorite. Table 2 shows typical mineralogical |  | Boschi, C., Dini, A., Dallai, L., Ruggieri, G., Gianelli, G. (2009) Enhanced CO2-mineral sequestration by cyclic hydraulic fracturing and Si-rich fluid infiltration into serpentinites at Malentrata (Tuscany, Italy) Chemical Geology, 265 (1) 209-226 doi:10.1016/j.chemgeo.2009.03.016 | Journal (article/letter/editorial) | | Article history: Accepted 10 March 2009 Keywords: Magnesite Serpentine Tuscany Carbon dioxide sequestration...a c t The magnesite deposits of Malentrata (Tuscany, Italy) were derived from serpentinite silicification–...of carbon dioxide into stable carbonates (e.g. magnesite, dolomite). Serpentinites at Malentrata were transformed...occurrence of opal, chromian montmorillonite, Fe-rich magnesite and minor iron sulfides and oxides. Widespread...alteration of serpentinite was accompanied by the formation of a network of magnesite and dolomite veinlets |  | | Journal (article/letter/editorial) | | leucite, lime, lizardite, magnesiochloritoid, magnesite, nepheline, and sepiolite are among the 240 species...jervisite, magnesiodumortierite, magnesiostaurolite, magnesite, monazite-(Nd), paracelsian, paraniite(Y), phosphoellenbergerite...leucite, lime, lizardite, magnesiochloritoid, magnesite, nepheline, and sepiolite. In particular, dolomite...geological history of what is now among the most famous outcrops in the world. The first discovery of ellenbergerite...Sweden, and abundantly in several fractured serpentinite outcrops in the western Alps. It is certainly the |  | | Journal (article/letter/editorial) | | bucher@uni-freiburg.de) ABSTRACT The Zermatt-Saas serpentinite complex is an integral member of the Penninic...lithosphere of the Tethys. Metamorphic textures of the serpentinite preserve the complex mineralogical evolution...km depth. Key words: antigorite; ophiolite; serpentinite; textures; Zermatt-Saas. INTRODUCTION Eclogite...composition and field appearance, and the exposed serpentinite area in the Swiss part of the complex is on...ultramafic rocks during subduction. A compilation of serpentinite textures is presented, which can be linked to |  | Boschi, Chiara, Dini, Andrea, Baneschi, Ilaria, Bedini, Federica, Perchiazzi, Natale, Cavallo, Andrea (2017) Brucite-driven CO2 uptake in serpentinized dunites (Ligurian Ophiolites, Montecastelli, Tuscany) Lithos, 288. 264-281 doi:10.1016/j.lithos.2017.07.005 | Journal (article/letter/editorial) | | MANUSCRIPT Abstract Understanding the mechanism of serpentinite weathering at low PT temperature - that involves...oxides (brucite) to form carbonate minerals (magnesite, calcite, hydromagnesite, nesquehonite). Mineral...has been demonstrated that the carbonation of serpentinite mine tailings and ED shafts, at low temperature...adjacent carbonated and non-carbonated serpentinite outcrops from Tuscany (Italy). NU Serpentinites...widespread in Tuscany, but naturally carbonated outcrops MA only occur in a few areas (Fig. 1; Boschi |  | | Journal (article/letter/editorial) | | of cross- or slip-fiber veins within massive serpentinite bodies, no such veins are to be found in the...chrysotile surrounding blocks and fragments of serpentinite rock. The highly sheared and pulverized nature...distinguishable : (I) hard, dense blocks of serpentinite rock, ranging from fractions of an inch to several...the above materials, with the exception of the serpentinite rock which consists mainly of lizardite and/or...like cel1ulose fibers in paper. Fragments of serpentinite gangue are scattered throughout the ore and |  | Boskabadi, Arman, Pitcairn, Iain K., Broman, Curt, Boyce, Adrian, Teagle, Damon A. H., Cooper, Matthew J., Azer, Mokhles K., Stern, Robert J., Mohamed, Fathy H., Majka, Jaroslaw (2017) Carbonate alteration of ophiolitic rocks in the Arabian–Nubian Shield of Egypt: sources and compositions of the carbonating fluid and implications for the formation of Au deposits. International Geology Review, 59 (4) 391-419 doi:10.1080/00206814.2016.1227281 | Journal (article/letter/editorial) | | Francis Group KEYWORDS Arabian–Nubian Shield; serpentinite; listvenite; carbonation; gold; fluid-mobile...roadside exposures of serpentinite SW of the Meatiq Dome (Figure 2). The serpentinite outcrops are brownish grey...dome shows a complex exposure of greenish grey serpentinite and shear zone hosted talc-rich rocks (Figures...e)). Veins, nodules and irregular pockets of magnesite and dolomite with quartz occur within the talc-rich...contacts between the talc-rich rocks and the serpentinite range from gradational to sharp (Figure 3(d)) |  | | Journal (article/letter/editorial) | | NW-SO streichenden Anomalien bestiitigen. Die Serpentinite stellen Teile eines zerscherten Ophiolithkomplexes...isolated anomalies represents a polyphase deformed serpentinite emplacement overlain by coarse grained eclogitic...levels of the crust. Distribution of other basement outcrops is determined by late Tertiary to Recent extensional...characterized by abundant tectonically emplaced serpentinite bodies. 3.- a southern zone rich in metavolcanics...in the last two domains. They indicate that serpentinite, metagabbro, metabasalt and to a minor extent |  | | Journal (article/letter/editorial) | | is evidently associated with the fact that the outcrops of iron quartzite, distributed over a large area...[12]. The recently dis covered major bodies of serpentinite in southeastern Cameroon, confined to an arcuate...are never theless not a uniform entity. Small outcrops of chlorite-talc rocks corresponding in composition...05 1.60 0.67 1.39 1.22 1.90 Note: K-1) Serpentinite, Kondong; GK-1722) seipentinite, Congo, DH 1...in the upper reaches of the Bumba River). The serpentinite lenses apparently represent frag ments of a |  | Gualtieri, A. F., Pollastri, S., Gandolfi, N. B., Ronchetti, F., Albonico, C., Cavallo, A., Zanetti, G., Marini, P., Sala, O. (2014) Determination of the concentration of asbestos minerals in highly contaminated mine tailings: An example from abandoned mine waste of Cretaz and Emarese (Valle d'Aosta, Italy) American Mineralogist, 99 (7) 1233-1247 doi:10.2138/am.2014.4708 | Journal (article/letter/editorial) | | evaluation of the hazard associated with serpentinite outcrops (and asbestos containing mine tailings)...difficult by two major factors: (1) asbestos bearing serpentinite textures typically consist of fine-to-ultrafine...magnetite, one of the main constituents of the serpentinite accessories, with the genesis attributed to...antigorite 8.07, calcite 40.86, dolomite 10.2, magnesite 4.09, albite 16.34); STD2 (chrysotile 10.44, tremolite...antigorite 16.49, calcite 36.53, dolomite 10.44, magnesite 4.18, albite 10.44). Specimens of the mineral |  | | Journal (article/letter/editorial) | | regarding the low productivity of plants typical of serpentinite environments. Introduction MAGNESIUM, THE SEVENTH...They are the common species: the carbonates, magnesite, MgCO 3 , 2 and dolomite, CaMg(CO3)2; the silicates...and O’Hanley, 1988) as are the occurrences of serpentinite rocks in many regions around the world (Barnes...of certain elements (>1000 ppm of Ni) by the serpentinite plant species Strepthanus polygaloides is known...cytosol and in the environment, particularly serpentinite localities. Another ion with similar size and |  | | Journal (article/letter/editorial) | | aeromagnetic anomalies in southeast Cameroon, outcrops of talc, serpentinites, gabbro-amphibolites, and... 181. The serpentinite lenses are near horizontal as determined from individual outcrops and t h e wide...weak or absent aeromagnetic anomalies above some outcrops of mafic rocks, which have complex contours depending...rich in magnesium, containing antigorite and magnesite and chromium. Channel sediments in creeks contain...serpentinites. Geochemical soil surveys o n serpentinite outcrops determining the distribution of Ni, Cr, |  | | Report (issue) | | REPORT 276 EVALUATION OF MINERALIZATION IN SERPENTINITE AND ENCLOSING ROCKS IN THE HAMDAH AREA, KINGDOM... Intrusive rocks .................. 5 5 8 SERPENTINITE ...................... 10 Description .......Hamdah serpentinite area ................... in pocket Sample location map of the Hamdah serpentinite area...goldpelt and the Hamdah serpentinite area ...... 3 Areal view of serpentinite containing numerous rounded...dike rock .................... 9 Areal view of serpentinite, carbonaceous schist, and mafic dike ...... |  | | Report (issue) | | ........................................ 17 Serpentinite ........................................................................ 17 WEATHERING OF SERPENTINITE AND TALC .....................................and enstatite versus height above base of the serpentinite .................................... 14 Multilithic............. 23 Photomicrograph of silicified serpentinite ................................................... 24 SiO2 and MgO, Fe2o3 and FeO versus serpentinite alteration ................................ |  | | Report (issue) | | Yilgarn antigorite, chlorite, tremolite, talc, magnesite and dolomite and Musgrave Blocks, but explorationfor...c volcanic sequences. Disseminated to matrix magnesite and anthophyllite, plus opaque phases. Nickel...Castro government in 1960. In 1942 in what was then Finland, the P e t m o mine, previously deve]o@ by NCO...German control. The USSR annexed this part of Finland (Kola Peninsula) in 1944 and PRODUCTtON Nickel...isolated outcrops of limonitic gossan were found over a strike length of 450m. the outcrops are about | | | Report (issue) | | the “Franciscan assemblage” including outcrops of serpentinite, basalt, limestone, ribbon chert, graywacke...of this exit. Easily-accessible exposures of serpentinite, layered-chert beds in chevron folds, and Silver...several miles on US Highway 101, blue-green serpentinite exposures can be seen in the hills to the left...Hills. Part of the hill country is underlain by serpentinite; the soils in these areas, particularly around...power-grid station for San José along US Highway 101. Serpentinite boulders are scattered across the hillsides |  | | Report (edition) | | intrusion of Tregonning-Godolphin. Granite also outcrops at Cligga Head, St. Agnes Beacon and St. Michael’s...minerals (dolomite and ferroan magnesite), The weathering of the ferroan magnesite is responsible for the brown...rock types which occur there, including the serpentinite which is the best example of its kind in England...dyke swarm is relatively poorly developed. Gabbro outcrops over a large area in the eastern part of the Lizard...greenish colours are seen in particularly weathered serpentinite and these varieties are used in the manufacture |  | | Report (edition) | | around Lizard Point 38 20. Vein of rodingite in serpentinite, Enys Head, Cadgwith 40 21. Map of the western...intrusion of Tregonning-Godolphin. Granite also outcrops at Cligga Head, St. Agnes Beacon and St. Michael's...minerals (dolomite and ferroan magnesite). The weathering of the ferroan magnesite is responsible for the brown...rock types which occur there, including the serpentinite which is the best example of its kind in England...dyke swarm is relatively poorly developed. Gabbro outcrops over a large area in the eastern part of the Lizard |  | | Journal (article/letter/editorial) | | quartz, and rutile, among others. Serpentinite Serpentinite outcrops in bands and pods along the length...mineralization includes artinite, hydromagnesite, magnesite, goethite-hematite, and quartz. guerian 1983;...Lizardite Magnesiochromite Magnesiocummingtonite Magnesite Magnetite Malachite Manasseite Marcasite Melanterite |  | | Report (issue) | | Quartzite....................................... Serpentinite, marble, and metabasalt............ Ultramafic-carbonate...Metabasalt, meta-andesite, carbonate rock, and serpentinite......................... Sandstone, conglomerate.................. Metaquartzose sandstone and serpentinite... Metabasalt.................................Amphibolite..................................... Serpentinite, and metavolcanic and carbonate rocks.........from: metasiltstone and carbonate rocks; and serpentinite, marble, and metabasalt.... 8 3. 4. 5. Estimated |  | | Report (issue) | | springs 103 Kaolin and other clay minerals 103 Magnesite 103 Mica 103 Ornamental stone 103 Phosphate rock...with counterparts Silva, Berm(1dez or Bonilla. Outcrops and river boulders were sampled and geo logical...intrusion or amphibolitisation. Regarding the two main outcrops, that at Monce Olivo appears to represent a stratigraphical...grey-green quartzites. In contrast, the Rio Anateno1io outcrops show massive, fine- to mediLun-grained garnet...schists; smaller bands are entirely schistose. Many outcrops are too small to show on the accom panying map |  | | Report (issue) | | the average compositions of primary spinel in serpentinite samples from the Nabitah fault zone...........Identified by a locus of northtrending, fault-bounded serpentinite bodies, the Nabitah fault system can be traced...present study. Patterns are: (1) ophiolitic serpentinite (grid) and gabbro/diabase (grid + inclined bars);...ing valley underlain by tectonic slivers of serpentinite, amphibolite, metabasalt, metatuff, and metasedimentary...Nabitah fault system. Delfour (1977) assigned the serpentinite, amphibolite, and some of the metabasalt to |  | | Report (issue) | | diffuse venting, high methane in water column, serpentinite >300 ultramafic hosted, western wall of axial...412, 145–149. Kelley, D. S., et al. (2005), A serpentinite-hosted ecosystem: The Lost City hydrothermal...properties of basalt ranging from terrestrial lava outcrops [AdeHall et al., 1971], to ocean crustal drilling...pillow lava, the vent fluid chemistry suggests a serpentinite influence. Finally, a small low-temperature...comprised of a nonmineralized, lizardite-dominated serpentinite result- ing from a static, relatively low-temperature |
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