 | | Report (chapter) | | Continental Margins: A Comparisonof Evidencefrom Land and Sea. Geological Society, London, Special Publications...with oceanic transform faults in analogy with serpentinite occurrences along such faults in present-day...---~, ~" ~ " ~ . . . . . ........7;: ,;:: ~ serpentinite' ,' / ~ 7~'" "-7 extensional allochthon...TR, Triassic; JL, Lower Jurassic; JM, Middle Jurassic; JU, Upper Jurassic; KL, Lower Cretaceous; Mn, manganese...'.'.' I Upper AustroI Alpine and South Alpine Lower Austro- I alpine I I I I [ I f I ~'... |  | | Journal (article/letter/editorial) | | Co-rich chromian spinels from the Bou-Azzer mining district (Morocco): Constraints on their relationship with...mining district Morocco a b s t r a c t The Co–Ni arsenides from the Bou-Azzer mining district contain...variations of chromian spinel disseminated in barren serpentinite, in Co arsenide ores and in Cu sulphide ores...spinels from Tamdrost and Aït-Ahmane ores have much lower contents in these elements. Zn and Mn concentration...Neoproterozoic tectonic evolution of the Bou-Azzer district The Bou-Azzer ore bodies . . . . . . . . . . |  | | Journal (volume) | | Natans L. in Süd-Pohjanmaa . .. 5. VLADI MARMO, Serpentinite of Pahta-autsi, Finnish Lapland . . . . . ....Canada Geol. lnst., Melkweg I, Groningen, Neder· land Geophysical Laboratory, 2801 Upton St., N. W., Washington...occured at the high hydrothermal stage and at a lower temperature than the main sulphide ore of Orijärvi...displaced by slip page and rotation, because of the lower cohesionty between the fragments in the fractured...will probably find that the b-lineation is of a lower angle and more strongly developed. A promising way |  | | Journal (volume) | | Natans L. in Süd-Pohjanmaa . .. 5. VLADI MARMO, Serpentinite of Pahta-autsi, Finnish Lapland . . . . . ....Canada Geol. lnst., Melkweg I, Groningen, Neder· land Geophysical Laboratory, 2801 Upton St., N. W., Washington...occured at the high hydrothermal stage and at a lower temperature than the main sulphide ore of Orijärvi...displaced by slip page and rotation, because of the lower cohesionty between the fragments in the fractured...will probably find that the b-lineation is of a lower angle and more strongly developed. A promising way |  | Alt, Jeffrey C., Garrido, Carlos J., Shanks, W.C., Turchyn, Alexandra, Padrón-Navarta, José Alberto, López Sánchez-Vizcaíno, Vicente, Gómez Pugnaire, María Teresa, Marchesi, Claudio (2012) Recycling of water, carbon, and sulfur during subduction of serpentinites: A stable isotope study of Cerro del Almirez, Spain. Earth and Planetary Science Letters, 327. 50-60 doi:10.1016/j.epsl.2012.01.029 | Journal (article/letter/editorial) | | Carlson Keywords: subduction stable isotopes serpentinite volatiles geochemical cycling a b s t r a c...ppm sulfur having δ34S = 1.2‰. Dehydration of serpentinite resulted in loss of 5 wt.% H2O having δ18O =...Isotopically fractionated water, carbon, and sulfur in serpentinite dehydration products are recycled deeper into...temperature (720–650 °C at 2–5 GPa), so subduction of serpentinite can carry volatiles to depths of up to 200 km...and Poli, 1998; Ulmer and Trommsdorff, 1995). Serpentinite dehydration products can also retain water and |  | Lord, R. A., Prichard, H. M., S.SA, J. H., Neary, C. R. (2004) Chromite Geochemistry and PGE Fractionation in the Campo Formoso Complex and Ipueira-Medrado Sill, Bahia State, Brazil. Economic Geology, 99 (2) 339-363 doi:10.2113/gsecongeo.99.2.339 | Journal (article/letter/editorial) | | Ipueira-Medrado mines, representative of the Jacurici Valley district, a folded segment of a 200- to 250-m-thick ultramafic-mafic...70–0.55) from the massive chromitites hosted by serpentinite, through the disseminated seams above, to the...above and below the main seam both have relatively lower XMg and XCr (0.36–0.45 and 0.45–0.57). This suggests...control.” The Ipueira-Medrado chromitite contains lower concentrations (<350 ppb) and has unfractionated...of the chromitite (to ca. 1 ppm) occurs from the lower massive group, through the upper disseminated group |  | González-Jiménez, José M., Camprubí, Antoni, Colás, Vanessa, Griffin, William L., Proenza, Joaquín A., O'Reilly, Suzanne Y., Centeno-García, Elena, García-Casco, Antonio, Belousova, Elena, Talavera, Cristina, Farré-de-Pablo, Júlia, Satsukawa, Takako (2017) The recycling of chromitites in ophiolites from southwestern North America. Lithos, 294. 53-72 doi:10.1016/j.lithos.2017.09.020 | Journal (article/letter/editorial) | | 2016). In this model, a mantle plume rises from the lower mantle through the MTZ or directly from the MTZ...sequence into four main zones (Fig. 2): (1) Lower Serpentinite Breccia, (2) ED Peridotite Zone, (3) Critical...Critical Zone and (4) Gabbroic Zone. The Lower Serpentinite Breccia is the lowermost known part of the...Puerto Nuevo Mélange. The boundary between the serpentinite breccia and the overlying serpentinised harzburgite...unclear in the field. As noted above, this Lower Serpentinite Breccia AC contains isolated blocks of |  | | Journal (article/letter/editorial) | | the top of the succession, whereas pyroxenites lower in the succession show varying degrees of interaction...fine-tomedium grained peridotites ascribed to the Lower Zone are equated with the pyroxenites, harzburgites...separated from each other by interlayers of serpentinite, clinopyroxenite, pegmatitic norite or INTRODUCTION...sulphides than the Merensky Reef and UG-2 chromitite, a lower overall PGE grade in the mineralised zone which...Complex and the overlying olivine ferrodiorites, magnetite gabbros, magnetites and anorthosites of the northern |  | | Report (issue) | | This has led to much study of the resources of the land, especially renewable resources such as timber and...wilderness areas primarily in the national forest land . The summarieswhich cover about 45 million acres...favorable ground assessments-the demarkation of land areas favorable for the occurrence of minerals accompanied... Since the program began in 1964, the amount of land to be studied has increased from the original 14...administrators who must make difficult and critical land-use decision that will affect our nation now and |  | | Journal (article/letter/editorial) | | [15]. to truly plastic (dislocational) in its lower part [21,33,39]. (1) In the most simple variant...plate, whereas that of the earth quakes on the lower focal surface corresponds to tension (spreading)...of increased fracturing of lithosphere; 3) lower serpentinite layer in the subsiding plate; 4) earthquake...associated with disruption (tectonic ero sion) of the lower and middle portions of the overthrust plate as a...including gen tly sloping planes dipping toward the land and steep fractures dipping in the direction of |  | Johnson, Scott E., Paterson, Scott R., Fletcher, John M., Girty, Gary H., Kimbrough, David L., Martín-Barajas, Arturo - Eds. (2003) Tectonic evolution of northwestern Mexico and the Southwestern USA. GSA Special Paper 374. Geological Society of America doi:10.1130/0-8137-2374-4 | Report (issue) | | susceptibility meter, he established the ilmenite-magnetite line within the Peninsular Ranges batholith and...batholith magmas were generated by melting of mafic lower-arc crust. Vill The following four papers present...denudation between 91 and 86 Ma and removal of lower crust and mantle lithosphere triggered erosional...of El Arco (28°N), upper-greenschist facies to lower-amphibolite facies quartzite and pelitic schist...forearc basin turbidites that range in age from lower Aptian (R. Sedlock, unpubl. data) to middle Eocene |
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Lower serpentinite quarry, Zwettler Leiten, Felling, Gföhl, Krems-Land District, Lower Austria, Austria