 | | Report (issue) | | the first comprehensive re-examination of the district since the 1899 revision by B. N. Peach and J....5 Northern serpentinite 6 The metamorphic at1reole adjacent to the northern serpentinite 13 Central zone...zone 15 Southern serpentinite 17 Basic igneous xenoliths in the southern serpentinite 23 Stinchar Valley...Balcreuchan Group: northern outcrop, Pinbain 36 The Balcreuchan Group: central outcrop 43 The Balcreuchan Group:...Group: southern outcrop 58 4 Late Arenig to early Llanvirn intrusive igneous components of the Ballantrae |  | | Journal (article/letter/editorial) | | Travertine-cemented screes on the serpentinite seacliffs of Unst and Fetlar, Shetland :DEREK ~ I N N... London W8 7AH, UK Abstract Screes on high serpentinite sea cliffs in Shetland have been ~nternally...aragonite on the serpentinite fragments. I~YWOROS: brucite, hydromagnesite, aragonite, calcite, travertine...post-glacial origin occur within the outcrop of the ophiolitic serpentinite of Unst and Fetlar, but not elsewhere...are travertine-cemented and occur only on high serpentinite sea cliffs. Type A are scree breccias cemented |  | Gil, Grzegorz, Gunia, Piotr, Barnes, Jaime D., Szymański, Michał, Jokubauskas, Petras, Kalbarczyk-Gil, Anna, Bagiński, Bogusław (2019) Origin of Talc and Fe-Ti-V Mineralization in the Kletno Deposit (the Śnieżnik Massif, SW Poland) Minerals, 10 (1) 13 doi:10.3390/min10010013 | Journal (article/letter/editorial) | | along with talc, envelopes a tectonic slice of serpentinite. Hornblendites are interpreted as metamorphosed...intrusion, interaction with serpentinite, or due to the metasomatism of the serpentinite–gabbro assemblage. Moreover...mineralization; talc; carbonate veins; stable isotopes; serpentinite-gabbro-sediment assemblage 1. Introduction...the culmination of the Żmijowiec Rib, where serpentinite and metabasite bodies are enclosed within the...metasediments. The best described unit is the serpentinite body, which has been the subject of several |  | 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) | | Malentrata (Tuscany, Italy) were derived from serpentinite silicification– carbonation of the Ligurian ophiolite...of the protolith. The pervasive alteration of serpentinite was accompanied by the formation of a network...discontinuities. This two-steps reaction (dissolution of serpentinite followed by carbonate precipitation outside..., MgCO3 magnesite, MgCa(CO3)2 dolomite, CaCO3 calcite, FeCO3 siderite, NaAl(CO3)(OH)2 dawsonite). This...widespread silicate rocks (i.e., peridotite, serpentinite, basalt) that trap safely CO2 over geological |  | | Journal (article/letter/editorial) | | 46, 1-5. Marcopoulos, T., and Economou, M. (1981) Am. Mineral. 66, 1020-1. Oswald, S. G., and Crook, W...(1875). It was found in a clay bed near a serpentinite outcrop at Mineral Hill, Delaware County, Pennsylvania... 1972, Madrid, 333-41. Cooke, J. P. (1875) Proc. Am. Acad. Arts Sci. 10, 451-2. Henmi, T., Wells, N....interstitial calcite. Individual crystals of bavenite are fractured and cemented by calcite. Epidote occurs...occurs as needles within calcite, and scheelite is present. Although not observed in the bavenite-bearing |  | | Journal (article/letter/editorial) | | The geology of the Bou Azzer-El Graara cobalt district has been examined thoroughly by Choubert [17]...cutting its structure into a number of blocks. The district lies on the northern edge of the African platform...granitoid intrusions; 7) flysch and molasse; 8) serpentinite and as sociated greenstones: 9) gneisses and...clearly mani fested in the Bou Azzer-El Graara district. Here, over a substantial area around the whole...brecciated, almost vertical contact between the serpentinite massif and quartz diorite. Antigorite 308 G |  | | Report (issue) | | “Franciscan assemblage” including outcrops of serpentinite, basalt, limestone, ribbon chert, graywacke...reservoir dams of the Santa Clara Valley Water District. In addition, stops include examination of an...this report. Both the Santa Clara Valley Water District and the Santa Clara County Parks and Recreation...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 |  | Michard, André, Feinberg, Hugues, El-Azzab, Driss, Bouybaouene, Mohamed, Saddiqi, Omar (1992) A serpentinite ridge in a collisional paleomargin setting: the Beni Malek massif, External Rif, Morocco. Earth and Planetary Science Letters, 113 (3) 435-442 doi:10.1016/0012-821x(92)90144-k | Journal (article/letter/editorial) | | Science Publishers B.V., Amsterdam 435 [DT] A serpentinite ridge in a collisional paleomargin setting:...external zones of the Maghrebides belt. We describe serpentinite clasts within calcareous deposits that are transgressive...detrital serpentinite layers that occur within greenschist formations. Reworking of the serpentinite clasts...marginal sedimentary prism. We connect the ultramafic outcrop with a regional, N E - S W trending magnetic anomaly...anomaly), and conclude that the source of the serpentinite clasts extended roughly parallel to the local |  | | 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 |  | Schwarzenbach, Esther M., Lang, Susan Q., Früh-Green, Gretchen L., Lilley, Marvin D., Bernasconi, Stefano M., Méhay, Sabine (2013) Sources and cycling of carbon in continental, serpentinite-hosted alkaline springs in the Voltri Massif, Italy. Lithos, 177. 226-244 doi:10.1016/j.lithos.2013.07.009 | Journal (article/letter/editorial) | | Sources and cycling of carbon in continental, serpentinite-hosted alkaline springs in the Voltri Massif...subsurface, also documented by the presence of late calcite veins. Concentrations of dissolved inorganic carbon...serpentinization processes and the carbonation of serpentinite (Andreani et al., 2008; Boschi et al., 2009;...that the Ca–OH waters form by dissolution of serpentinite and concomitant carbonate precipitation in a...to gray–white surfaces. XRD analyses show that calcite is the dominant mineral phase in the deposits, |  | | Journal (article/letter/editorial) | | serpentinites is postulated as a probable explanation. Calcite veins are ubiquitous in the ETO. Three carbon sources...carbon. In the last case, it is shown that some calcite veins may contain a substantial amount of CO2 derived...the surrounding Lichi mudstone. Therefore, the calcite veins with an organic carbon signature are suggested...ideal ophiolite complex, such as peridotite/serpentinite, gabbro, plagiogranite, dolorite, pillow basalt...actinolite; ant = antigorite; anth=anthophyllite; cc=calcite; ch=chlorite; chry=chrysotile; ep=epidote; h=m |  | | Journal (article/letter/editorial) | | chrysotile content is strongly complicated by typical serpentinite textures, consisting of fineto-ultrafine intergrowths...requirements. Keywords: Chrysotile, asbestos, massive serpentinite, thermal analysis, quantitative determination...vitic@unisi.it 0003-004X/11/0007–1003$05.00/DOI: 10.2138/am.2011.3734 similar chemical compositions, usually...: DTA QUANTITATIVE ANALYSIS OF CHRYSOTILE IN SERPENTINITE in cross or slip monomineralic veins, fractures...as pervasively dispersed within the massive serpentinite. The correct evaluation of the potential health |  | | Journal (article/letter/editorial) | | com/loi/tigr20 Jade (Nephrite and Jadeitite) and Serpentinite: Metasomatic Connections a G. E. Harlow & S...Sorensen (2005) Jade (Nephrite and Jadeitite) and Serpentinite: Metasomatic Connections, International Geology...reserved. Jade (Nephrite and Jadeitite) and Serpentinite: Metasomatic Connections G. E. HARLOW1 American...Avenue, NW, P. O. Box 37012, NHB-119, Washington, District of Columbia 20013-7012 Abstract The lapidary...that are intimately connected with their host serpentinite bodies and convergent-margin petrotectonics |  | | Book | | Geology of Unst and Fetlar in Shetland The district described in this memoir is covered by Sheet 131...publications of the Survey dealing with this district and adjoining district. Books Memoirs Geology of Yell and...Exploration 138 Two Outline of the geology of the district 4 Basement to the Shetland Ophiolite-complex 4...FIGURES Physiographical and locality map of the district 2 Simplified map of the Valla Field and Lamb Hoga...3 Tectonic blocks forming the Unst and Fetlar district 6 4 Diagrammatic section through the Shetland |  | | Report (issue) | | reflects the strong relative magnetization of serpentinite bodies and shows similar structural trends.... The contrast in magnetic expression of serpentinite and hornblende schist, the other major rock unit...delineation of serpentinite masses beneath areas of shallow alluvial cover. Serpentinite is inferred to...southeast of the ancient workings. Areas of serpentinite outcrop are characterized by a pattern of intense...(1981), supported by drilling data, that the serpentinite is essentially rootless, that is, that it overlies | | Swayze, Gregg A., Higgins, Chris T., Clinkenbeard, John P., Kokaly, Raymond F., Clark, Roger N., Meeker, Gregory P., Sutley, Stephen J. (2004) Preliminary report on using imaging spectroscopy to map ultramafic rocks, serpentinites, and tremolite-actinolite-bearing rocks in California. Open-File Report 2004-1304. US Geological Survey doi:10.3133/ofr20041304 | Report (issue) | | in El Dorado and Plumas Counties that contain serpentinite and ultramafic rocks as part of an experiment...Serpentine has been detected outside of known serpentinite outcrop areas, mostly as aggregate that covers dirt...predominantly, but not exclusively, found in serpentinite and ultramafic rocks, which are common in the...were collected in August 2001 over exposures of serpentinite and ultramafic rocks that were mapped during...Flagstaff Hill line (#14) was flown N-S and includes serpentinite outcrops along the exposed low-water shoreline |  | Hodel, F., Macouin, M., Triantafyllou, A., Carlut, J., Berger, J., Rousse, S., Ennih, N., Trindade, R.I.F. (2017) Unusual massive magnetite veins and highly altered Cr-spinels as relics of a Cl-rich acidic hydrothermal event in Neoproterozoic serpentinites (Bou Azzer ophiolite, Anti-Atlas, Morocco) Precambrian Research, 300. 151-167 doi:10.1016/j.precamres.2017.08.005 | Journal (article/letter/editorial) | | produced an intense magnetite leaching in the host serpentinite and an advanced Cr-spinels alteration to ferritchromite...Neoproterozoic seafloor. Keywords: Neoproterozoic, Serpentinite, Hydrothermalism, Magnetite, Cr-Spinel, Ophiolite...serpentinites rich in magnetite (79.1 wt. % FeOtot), calcite, andradite/hydroandradite and diopside, as a product...dunite lenses and chromite pods. The largest serpentinite outcrop is located next to the Aït Ahmane locality...serpentine variety and accessory minerals. Every serpentinite sample was powdered and scanned from 2 to 80 |  | | Report (issue) | | of BGS, Leeds) is also gratefully acknowledged. I am indebted to Dr H . W. Bailey (Paleoservices Ltd)...dolerite and gabbro within the southern serpentinite outcrop had been metamorphosed under hornblende-...BLUESCHISTS DYNAMOTHERMAL 'SOLE' TO THE NORTHERN SERPENTINITE IAMPHIBOLITE + EPIDOTE-SCHIST) as clasts in...in sedimentary melange deposits SERPENTINITE; RODINGITE; in situ foliated basalts AMPHIBOLE-HORNFELS...Geological boundaries including faults SOUTHERN SERPENTINITE OUTCROP ONLY Metamorphic facies boundaries (where |  | | Journal (article/letter/editorial) | | relatively dark color and massive nature in 3 outcrop. All metavolcanics contain a calcic amphibole,...34) 10 concentrating in masses of chlorite and calcite (Fig. 4c; Fig. 5; Table 3). In Abu Marwat, 11... only been found in one location near a serpentinite outcrop (DB13-10; Fig. 2d). In these BIFs 22 (which...secondary veins 15 1 with epidote, K–feldspar, or calcite in various rock types. Like epidote, chlorite has...ubiquitous quartz, many samples contain secondary calcite in veins or amygdules 8 (Fig. 4d, h, I, j). Relict |  | | 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 |  | | Journal (article/letter/editorial) | | overlies an imbricate zone, containing some serpentinite that was termed a tectonic mélange by Flinn...Dalradian GCR sites in Shetland lie within the outcrop of the East Mainland Succession, in the southern...while the outcrop of the Whiteness Group is about 6 km wide. The layering throughout the outcrop is approximately...accompanied by pegmatitic streaks. A 300 m-wide outcrop of granite follows, in which there are only very...eastern coast of Lax Firth, although the full outcrop extends to the western side of the firth and the |  | Chen, Shi, Guo, Zhaojie, Pe-Piper, Georgia, Zhu, Beibei (2013) Late Paleozoic peperites in West Junggar, China, and how they constrain regional tectonic and palaeoenvironmental setting. Gondwana Research, 23 (2) 666-681 doi:10.1016/j.gr.2012.04.012 | Journal (article/letter/editorial) | | belts of ophiolitic rocks, principally serpentinite, outcrop in West Junggar: the Darbut ophiolitic belt...Carboniferous succession in West Junggar. (b) Outcrop of fluvial conglomerate in Xibeikulasi Formation...cross bedding in Baogutu Formation. (e) Typical outcrop of Tailegula Formation. Fig. 3. Cross section...of about 70% pyroclastic material, cemented by calcite (25%), that is dominated by angular and sub-angular...lava clasts with a small amount of recrystallized calcite adjacent to them (Fig. 4i). S. Chen et al. / |  | | Journal (issue) | | of basalt columns near Kiama, in the Ilia warra district of New South Wales. Courtesy Sterling Memorial...him to the south of Sydney through the Illawarra district and Kangaroo Valley to Mount Coolangatta on 3See...strange new land. Their exploration of the Illawarra district, a spectacularly beautiful area which lies to...correspondence with Clarke: “ . . . that [the] Illawarra district is a perfect gem of a place for Geology as well...these intriguing crystals are now thought to be calcite pseudomorphs after ikaite (CaC03-6H20 ), a rare |  | | Report (edition) | | ......................................... 229 Calcite .................................................Cabochons of amazonite from Melville in the Yalgoo district ................................................brassy masses of marcasite together with white calcite aggregates ......................... 207 26.7 Pyrite................ 229 Faceted, 5.19 ct colourless calcite demonstrating the doubling effect of a line ...................... 272 A finely carved fish in serpentinite from the Nunyerry chrysotile deposit....... |  | | Journal (volume) | | Natans L. in Süd-Pohjanmaa . .. 5. VLADI MARMO, Serpentinite of Pahta-autsi, Finnish Lapland . . . . . ....Redefinition of Tellurobismuthite and Vandestite. Am. J. Sei. 238. 880. GARRIDO, J. and R. FEO (1938)...HARCOURT, G. ALAN (1942) X-ray Patterns of Ore Minerals. Am. mineralogist 27, p. 63. HARKER, D. (1934) The crystal...telluride minerals and their occurrence in Canada. Am. mineralogist 34, pp. 342- 382. UYTENBOGAARDT, W...the rock is plastic, consisting of minerals like calcite, chlorite and mica, the curve will gradually change |
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