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| Metasomatic reaction bands at the Mt. Hochwart gneiss-peridotite contact (Ulten Zone, Italy): insights into fluid-rock...Abstract We investigated the contact zone between peridotite lenses and host gneisses located on the northern...ultramafic body consists of a hectometre-sized garnet peridotite and harzburgite lens. The reaction zone shows...tremolite-anthophyllite-talc-rich rocks from the host gneiss towards the peridotite. In some cases, lenses...lenses of serpentine and talc in association with chlorite, and trondhjemitic pods develop at the ultramafic |
 | | Report (issue) |
| differentiate represented by a pyroxenite and peridotite mass almost completely altered to serpentine...rock. It seems probable that the serpentinized peridotite-pyroxenite series represents a floor phase of...Dublin, in Harford County, associated with a lens of talc, there is an area of zoisite-actinolite schist that...derived from the peridotite magma caused both the serpentinization of the peridotite and the subsequent...cites the common occurrence of albitic veins in peridotite as an evidence of the expulsion of sodic vapors |
 | Marocchi, Marta, Hermann, Jörg, Tropper, Peter, Bargossi, Giuseppe Maria, Mair, Volkmar (2010) Amphibole and phlogopite in “hybrid” metasomatic bands monitor trace element transfer at the interface between felsic and ultramafic rocks (Eastern Alps, Italy) Lithos, 117 (1) 135-148 doi:10.1016/j.lithos.2010.02.011 | Journal (article/letter/editorial) |
| plus minor chlorite and talc. Zone 3 grades into an amphibole–garnet peridotite lens. This reaction zone...(gneiss) and a trace element depleted reservoir (peridotite) allows assessment of local trace element mobility...the gneiss–peridotite interface (Tumiati et al., 2007; Marocchi et al., 2009). The peridotite body presented...subduction-related mantle metasomatism can be studied on an outcrop scale. In fact, onland exposures of such contacts...limited to vein-like metasomatic alteration in peridotite defined by concentration of hydrous minerals or |
 | | Report (volume) |
| Survey, a description of the Corundum and the Peridotite Deposits of Western North Carolina, pre¬ pared...Topographic forms. Superficial aspects . Ecology of the peridotite areas. 61 62 64 Chapter III.—-Petrography of...County, North Carolina. Elf dunite. Elf amphibole-peridotite. Elf troctolite. Elf amphibolite. Elf gabbro...area. Buck Creek dunite. Buck Creek amphibole-peridotite. Buck Creek troctolite and olivine-gabbro. Corrosion...Glenville. Harzburgite on Big Ridge. Amphibole-peridotite of Shoal Mountain. Vicinity of French Broad River |
 | | Journal (article/letter/editorial) |
| rock descriptions The 16°52'N serpentinized peridotite outcrop (dredge 13, Fig. 1) lies on the eastern rift...from large transform faults. The location of this outcrop relative to minor axial discontinuities is not...bathymetric coverage of the area. The 15°37'N outcrop of serpentinized peridotites and gabbros (dredge...[20]. Serpentinized ultramafics and gabbros also outcrop along the western rift valley wall in the same...Serpentinized peridotite cut by gabbroic dykelets, now extensively altered into a talc, chlorite and |
 | Marocchi, M., Marschall, H. R., Konzett, J., Tropper, P., Ludwig, T., Mair, V., Bargossi, G. M. (2011) Metasomatic tourmaline in hybrid contact-bands between gneiss and peridotite in the Ulten zone of the Eastern Italian Alps: chemistry and boron isotopic composition. The Canadian Mineralogist, 49 (1) 245-261 doi:10.3749/canmin.49.1.245 | Journal (article/letter/editorial) |
| TOURMALINE IN HYBRID CONTACT-BANDS BETWEEN GNEISS AND PERIDOTITE IN THE ULTEN ZONE OF THE EASTERN ITALIAN ALPS:...of aqueous fluids. These hybrid bands at the peridotite– gneiss contact comprise phlogopite and anthophyllite...within metasomatic bands forming at the gneiss–peridotite contact of the Ulten Zone HP subduction mélange...contrasting B isotopic compositions into the peridotite. Background Information Tourmaline has an almost... metasomatic tourmaline between gneiss and peridotite Geological Background and Tourmaline Occurrences |
 | | Journal (article/letter/editorial) |
| 1007/s00410-015-1146-3 ORIGINAL PAPER Weathering crusts on peridotite Kurt Bucher1 · Ingrid Stober1 · Hiltrud Müller‑Sigmund1...weathering of dark-green massive peridotite, including partly serpentinized peridotite, produces a distinct and...composition of crusts on rocks from the Ronda peridotite, Spain, have been studied in some detail. The generic...generic overall weathering reaction serpentinized peridotite + rainwater = weathering rind + runoff water...water supply from the outcrop surface to the reaction front separating green peridotite from the brown crust |
 | | Report (issue) |
| 1818 00016298 0 2 t P^ 3 The Yellow Dog Peridotite and A Possible Buried igneous Complex of Lower...Yellow Dog Peridotite 2.--Electron microprobe anJyses of olivines from the Yellow Dog Peridotite 3.--Electron...from the Yellow Dog Peridotite 4.--Trace element content of the Yellow Dog Peridotite 5.--Comparison of...for average ultraniafic rocks and Yellow Dog Peridotite 6.--Summary of data and interpretation of anomalies... ' I i! c. Abstract Partly serpentinized peridotite of early Keweenawan age crops out in two places |
 | Hekinian, R., Bideau, D., Cannat, M., Francheteau, J., Hébert, R. (1992) Volcanic activity and crust-mantle exposure in the ultrafast Garrett transform fault near 13°28′S in the Pacific. Earth and Planetary Science Letters, 108 (4) 259-275 doi:10.1016/0012-821x(92)90027-s | Journal (article/letter/editorial) |
| the emplacement of a sliver of serpentinized peridotite located in an area about 2 km wide and 10 km...metabasalt (Mb) and dolerite and serpentinized peridotite ( p ) from the Median Ridge (dives GN03, 13,...thickness (hundreds of metres) of the erpentinized peridotite and gabbros is found along dive GN14 and GN03...m depths (Fig. 2, 3, 4E and 8). Serpentinized peridotite and gabbros abound along the track of dive GN15...diameter) at 3753 m (Fig. 2).(B) Outcrop of serpentinized peridotite showing subparallel striations (dive |
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| serpentinization, oxidation and weathering of mantle peridotite at low temperatures Research Juan Carlos de...serpentinization, oxidation and weathering of mantle peridotite at low temperatures. Phil. Trans. R. Soc. A 378:... c.4750601. JCO, 0000-0002-9962-8177 Mantle peridotite in Wadi Fins in eastern Oman exhibits three concentric...alteration zones are evident from their colouration in outcrop and hand samples: green and red. These zones exhibit...and elsewhere by fluvial conglomerates rich in peridotite cobbles. This was followed by a marine transgression |
 | | Report (issue) |
| 17 (see Fig. 1), progressive replacement of peridotite by dolomite was observed below a depth of 29...others, 1911) noted that gabbro (minverite) and peridotite (picrite) were "so intimately associated as to...macroscopic layering, and alternations of gabbro and peridotite were observed by I.G.S. in borehole cores. McDonald...Whether the lampro phyres are coeval with the peridotite, are cut by it or transect it at depth, remains...Such considerations would place the age of the peridotite at about 260 Ma, or perh ap s a little earlier |
 | | Journal (issue) |
| THE GEOLOGY OF TWO SMALL LAYERED HORNBLENDE PERIDOTITE (PICRITE) PLUTONS IN SOUTH GREENLAND BY JEVAN... THE GEOLOGY OF TWO SMALL LAYERED HORNBLENDE PERIDOTITE (PICRITE) PLUTONS IN SOUTH GREENLAND BY JEVAN...of the geology of two small layered hornblende peridotite (picrite) plutons mapped by the author whilst...thin and polished sections. In addition, three peridotite samples have been analysed for their major elements...the Amitsoq body at 1: 400, but the Angmalortoq peridotite was not mapped as it is only exposed over an |
 | | Book (edition) |
| was appo.rently sunk in the lower po.rt of this outcrop and did not encounter benitoite. The smaller open...These bowlders ho.ve evidently rolled from the outcrop on the hill above and probably from near the mine...smement is found in the position of the vein at the outcrop o.nd in the tunnel, of the layers of blue schist...1 the open cut. Doctor Louderback mentions the outcrop of sr.heroido.l gabbro on the southeast of the...the benitoite deposit on the hillside. The outcrop of rock on the north side of the vein zone, on the summit |
 | | Report (issue) |
| ultramafic tectonite...... 17 Interlayered gabbro & peridotite.... 18 Gabbro.............................. 18................I...................... 14 7. An outcrop of polymict breccia in the Wadi Khadrah area. ...phyllonite and moderately deformed cumulus gabbro and peridotite...!....................... 20 9. Effects of deformation... FIGURE 11. Folded quartz veins on horizontal outcrop surfaces in the Wadi Khadra phyllonite......................................... 23 12. Outcrop of the Wadi Khadra phyllonite showing F3 folds........ |
 | | Report (issue) |
| DIAMOND-BEARING PERIDOTITE IN ARKANSAS. By HUGH D. MISER. INTRODUCTION. Four areas of peridotite near Murfreesboro...1842. The rock, however, was not known to be peridotite until 1889, when Branner and Brackett 1 published...the Arkansas diamonds and the geology of the peridotite in this region, as indicated in the following...Little Rock, 1907, 16 pp. A unique collection of peridotite: Science, vol. 28, 1908, pp. 92-93. Sterrett...pp. 757-759. Purdue, A. H., A new discovery of peridotite in Arkansas: Econ. Geology, vol. 3, 1908, pp |
 | | Journal (article/letter/editorial) |
| Petrogenesis, alteration, and deformation in mantle peridotite from 14° to 16°N on the Mid-Atlantic Ridge: ODP...between 14° and 16°N we recovered residual mantle peridotite (75%) and evolved gabbroic rocks (25%). These...intrusive relationship to the host residual mantle peridotite and there are abundant gabbroic intrusions present...serpentinization of peridotite has been overprinted by talc mineralization. At another site, talc alteration is...deformation in residual mantle peridotite is minimal, rather at all sites where peridotite was recovered deformation |
 | | Journal (article/letter/editorial) |
| continental to oceanic lithosphere. The three Zabargad peridotite bodies cover 1.5 km2 of the 5-km2 island (see...locally constitute up to 10 vol.% of the peridotite outcrop. Finally, there is evidence of hydrothermal... 1988). In tectonic contact with the Central Peridotite is a lower crustal metamorphic unit consisting...various studies have attempted to interpret the peridotite within the context of one continuous ddiapiric...rifting, as zircons in gneisses close to the peridotite contact have recrystallization dates similar |
 | Song, Shuguang, Su, Li, Niu, Yaoling, Zhang, Lifei, Zhang, Guibing (2007) Petrological and geochemical constraints on the origin of garnet peridotite in the North Qaidam ultrahigh-pressure metamorphic belt, northwestern China. Lithos, 96 (1) 243-265 doi:10.1016/j.lithos.2006.09.017 | Journal (article/letter/editorial) |
| geochemical constraints on the origin of garnet peridotite in the North Qaidam ultrahigh-pressure metamorphic...(UHP) metamorphic belt, NW China, a large garnet peridotite massif has been exhumed together with felsic...altogether suggest that the protoliths of the garnet peridotite massif represent rocks from a subarc system in...Elsevier B.V. All rights reserved. Keywords: Garnet peridotite; Cumulate origin; Continental subduction; North...Qaidam UHP belt; NW China 1. Introduction Garnet peridotite is volumetrically small, yet a common component |
 | | Journal (article/letter/editorial) |
| constituted by exceptionally fresh peridotite. Fractured portions of the peridotite bodies, however, locally underwent...(Marshak et al., 1992). Major faults within the peridotite rigid bodies were loci of convective transport...unaltered and geochemically undepleted upper mantle peridotite, outcropping in three distinct bodies (northern...see Fig. 1 ). Most of the contacts between the peridotite unit and the adjacent bodies of pan-African gneiss...Ottonelio .[Z-2118 tZ-2122 ZABARGAD Northern Peridotite 0 I I IS. 3o- 500rn 27" I ~% o~m ~ |
 | | Report (issue) |
| enclose pyroxene grains. Only rarely does the peridotite contain enough clinopyroxThe penetrative-deformation...dike walls; this texture may reflect flow The peridotite of the ultramafic member is general- alignment...selected trace elements in ultramafic rocks (peridotite, harzburgite, pyroxenite) of the Canyon Mountain...Serpentinized Tectonite Tectonite Pyroxenite peridotite harzburgite harzburgite CM54 CM64 Pyroxenite...depleted in light REEs, regardless of which model peridotite lithology is adopted; details of the modeling |
 | | Report (issue) |
| discovered since 1986, about half had either an outcrop or subcrop surface expression or a distinct, relatively...moderate-sized detrital deposits adjacent to Brockman outcrop in the Hamersley Basin over the last decade. The...Increasing maturity of exploration in areas of outcrop, which leads to increased activity in areas of...manganese, banded iron formation (BIF) iron ore, and talc in metasomatised dolomitic rocks. A regional model...include gold, copper, lead, manganese, iron and talc. The distribution of the deposits is shown in Fig |
 | | Book |
| and 90 Ma are modelled as high degree melts of peridotite, most likely within a mantle plume head which...within the various peridotite types - these vary in composition from abyssal-peridotite-like through highly...kimberlite formed in an eclogitic environment, 35% in peridotite environments and the remaining 15% are from the...garnet compositions in real rocks (mantlederived peridotite xenoliths) it became obvious that these small...in many parts of Australia, hiding geological outcrop and obscuring the geochemical signatures of ore |
 | | Report (volume) |
| ........... 521 New areas of diamond-bearing peridotite in Arkansas, by H. D. Miser..... 534 Survey publications...... XI. Maps showing geology of new areas of peridotite in T. 8 S., R. 25 W., Arkansas.................Comity, Cal............................... 56. Outcrop of bedded celestite deposits in Avawatz Mountains...Arkansas, showing distribution of known areas of peridotite ...............................................plutonic rocks, such as .granodiorite, gabbro, and peridotite, and by many dikes having, a wide range in chemical |
 | | Journal (volume) |
| alteration tends to obscure these features. In outcrop the contacts of the rhyolite generally appear to...time E. N. Schwartz, of Lakeport, came across an outcrop in the creek bed a short distance below the resort...mineralization strikes northwest and extends from the outcrop in the creek bed (mentioned in the preceding paragraph)...2 miles. prominent feature of this belt is an outcrop of white silicified material that resembles chert...stands without timber. According to Russell, the outcrop of the coal can be traced for 3,500 feet on the |
 | | Report (issue) |
| glacial till dipping from surface towards 05 26 outcrop of asbestos lens in mica-gneiss bedrock. ........ from turn our prospecting attention to outcrop the drift areas, we covered Professor A....average analysis over a large area, including outcrop and overburden, but it is generally true that overburden...deduced from the fact that scouring of the outcrop occurs on the side facing the glacier and deposition...deposition of till usually occurs in the lee of the outcrop. Materials deposited by glacial ice are generally |
