 | | Report (edition) | | Peninsula II Mount’s Bay 15 III St. Agnes District 24 IV Falmouth Bay 29 V_ The Lizard Peninsula...intrusion of Tregonning-Godolphin. Granite also outcrops at Cligga Head, St. Agnes Beacon and St. Michael’s...China clay has been extensively exploited in this region in the past, but china clay is nowadays only exploited...and Symes (1987). The youngest deposits of the region are the small patches of Tertiary and Quaternary...hammering. ITINERARY III ST. AGNES DISTRICT The St. Agnes district (Figure 10) has been an important mining |  | | Report (edition) | | Peninsula II Mount's Bay 1 4 III St. Agnes District IV Falmouth Bay V The Lizard Peninsula REFERENCES...Megiliggar Rocks 23 13. Map of the St. Agnes district 26 14. North-south cliff section through the...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...this region in the past, but china clay is nowadays only exploited in the St. Austell district and at |  | Viti, Cecilia, Collettini, Cristiano, Tesei, Telemaco, Tarling, Matthew, Smith, Steven (2018) Deformation Processes, Textural Evolution and Weakening in Retrograde Serpentinites. Minerals, 8 (6) 241 doi:10.3390/min8060241 | Journal (article/letter/editorial) | | progressive evolution from undeformed mesh and bastite pseudomorphic textures to foliated, ribbon-like...important deformation mechanisms in retrograde serpentinite, and that they are frictionally weak (µ ~0.3)...feedback weakening mechanism. Keywords: retrograde serpentinite; slickenfibre veins; (001) sliding; pressure...significance of serpentinite (e.g., [11–14]). An understanding of the mechanical behaviour of serpentinite has been...geological and petrological studies of natural serpentinite-bearing faults and shear zones (e.g., [15–22]) |  | 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...widespread silicate rocks (i.e., peridotite, serpentinite, basalt) that trap safely CO2 over geological...analogue of CO2 mineralogical sequestration, a serpentinite- Fig. 1. Geological map of southern Tuscany |  | 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...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...Pavone River deeply eroded a plurikilometric serpentinite body embedded in shales that are up to 300 m |  | | 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...harzburgites is still visible in relic pseudomorphic bastite and locally preserved mesh textures. The primary...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 |  | | Journal (article/letter/editorial) | | et al. 1995). In contrast to other ophiolitic outcrops, Elba serpentinites escaped prograde regional...serpentinites. The thermal aureole hosts four main serpentinite outcrops (Fig. 1). According to previous petrographic...Geological sketch showing the four main serpentinitic outcrops (A–D) within the Monte Capanne contact aureole...granodioritic intrusion. The inset shows serpentinitic outcrops (black) in both Western and Eastern Elba. the...highest grade assemblages occur in the A and D outcrops, respectively, even though sample paragenesis |  | Cooperdock, Emily H.G., Raia, Natalie H., Barnes, Jaime D., Stockli, Daniel F., Schwarzenbach, Esther M. (2018) Tectonic origin of serpentinites on Syros, Greece: Geochemical signatures of abyssal origin preserved in a HP/LT subduction complex. Lithos, 296. 352-364 doi:10.1016/j.lithos.2017.10.020 | Journal (article/letter/editorial) | | October 2017 Available online xxxx Keywords: Serpentinite Syros Cycladic Blueschist unit Trace element...and magnetite. δD and δ18O values of bulk rock serpentinite powders and chips (δD = −64 to −33‰ and δ18O...peridotite. However, recent compilations of global serpentinite data demonstrate that whole rock major and trace...with serpentinites in multiple meta-ophiolitic outcrops (Katzir et al., 2007; Keiter et al., 2011; Ridley...element, and stable isotope geochemistry from serpentinite samples that cover all major occurrences on |  | | 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 ...... |  | | Journal (article/letter/editorial) | | . . . . . . . 3.3.1. Inherited signature of serpentinite protoliths . . . . . . . . . . . . . . . . ...thermometry) of serpentinization . . . . . 4.2. Serpentinite fingerprints in subduction geochemical cycle... . . . . . . . . . . . . . . . . . . 4.2.3. Serpentinite dehydration and its relation with arc magmatism...correspond to a fully representative set of serpentinite compositions worldwide (see references through...and Trommsdorff, 1995). Above the mantle wedge serpentinite layer, water percolates into the anhydrous mantle |  | 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...contacts between the talc-rich rocks and the serpentinite range from gradational to sharp (Figure 3(d))...serpentinites, nine hand specimen samples of serpentinite were divided into two groups, and were powdered |  | | 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 ................................ |  | Barnes, Jaime D., Beltrando, Marco, Lee, Cin-Ty A., Cisneros, Miguel, Loewy, Staci, Chin, Emily (2014) Geochemistry of Alpine serpentinites from rifting to subduction: A view across paleogeographic domains and metamorphic grade. Chemical Geology, 389. 29-47 doi:10.1016/j.chemgeo.2014.09.012 | Journal (article/letter/editorial) | | mobility of Pb, Ba, Cs, U, Rb during subduction •Serpentinite-crustal contact is analogous to the slab-mantle...Canavese unit and Punta Rossa Unit). Bulk rock serpentinite samples have high REE RI concentrations, compared...distance to the interface between the sediment and serpentinite. The chemical gradient between the ultramafic...values increase, 37Cl values decrease within the serpentinite with decreasing distance to the contact and...geochemical gradients within the Punta Rossa serpentinite indicates a limited role for externally derived |  | | Report (issue) | | . 50 Foothills Fault Zone and the Mother Lode District.................. 51 Conclusions................the average compositions of primary spinel in serpentinite samples from the Nabitah fault zone...........initial formation as normal faults in the fore-arc region of such an arc system. Based on the presence of...and analogous tectonic setting, the Mother Lode District in California is reviewed as a model for gold...Identified by a locus of northtrending, fault-bounded serpentinite bodies, the Nabitah fault system can be traced |  | | Book | | Magmatism in Serpentinized Peridotites from the 15°N Region. Mathilde Cannat and lohn F Casey 5 Gabbroie...Ridges: Implications for Melt Generation and Mantle Outcrops Chan tal Tisseau and Thierry Tonnerre 181 Introduction...Magmatism in Serpentinized Peridotites from the 15°N Region. MATHILDE CANNAT AND lOHN F. CASEY* URA 736, Laboratoire...melt segregation to produce evolved magmas in this region of the Atlantic are also discussed. Introduction...Nautile cruise in the Capo Verde Fracture zone region (IsoN; Fig. 1) of the Mid-Atlantic Ridge (Bougault |  | Berger, Julien, Caby, Renaud, Liégeois, Jean-Paul, Mercier, Jean-Claude C., Demaiffe, Daniel (2011) Deep inside a neoproterozoic intra-oceanic arc: growth, differentiation and exhumation of the Amalaoulaou complex (Gourma, Mali) Contributions to Mineralogy and Petrology, 162 (4) 773-796 doi:10.1007/s00410-011-0624-5 | Journal (article/letter/editorial) | | showing the position of the main Pan-African outcrops with emphasis on continental and oceanic arcs...are presented in the Electronic Appendix A2. Serpentinite unit Fig. 3 a Geological map of the Amalaoulaou...dominance of serpentine with the occurrence of some bastite (retrogressed orthopyroxene) suggests that they...fabrics are preserved in some boudins of massive serpentinite, defined by elongated sigmoidal porphyroclasts...conditions. At the contact with the underlying serpentinite unit, the epidote amphibolites are transformed |  | | Book | | the roof of the upper mantle); (iii) widespread outcrops of abyssal gabbros and serpenof the mantle origin...connection, the World Rift System is pictured as a region of the Earth in which the deep-seated evolutionary...interrelationship of such the new formation of the oceanic region. geological phenomena as the development of mid-oceanic...geological evolution of the Bay of Bengal platform region, which is an oceanic platform, is sedimen tation...surface and in close relationship to ultrabasic rock outcrops associated with the upper mantle matter. This |  | | Book | | open your eyes to the largest and most unexplored region on Earth – the global Mid-Ocean Ridge. My own introduction...produced, was that there appeared to be a shallow region in the middle of the North Atlantic basin that...bathymetric map of the Mid-Atlantic Ridge in the 20–24° N region showing the prominent rift valley, rough topography...20’W and are part of the seamount province in this region. 1.3 DEVELOPMENTS IN OPTICAL IMAGING TECHNOLOGY...he co-designed, transported him to the deepest region of the global ocean, the Mariana Trench, to sample |  | Shagam, R., Hargraves, R. B., Morgan, W. J., Houten, F. B. Van, Burk, C. A., Holland, H. D., Hollister, L. C. - Eds. (1972) Studies in Earth and Space Sciences. GSA Memoir 132. Geological Society of America doi:10.1130/mem132 | Report (issue) | | Mechanisms for the Emplacement of AlpineType Serpentinite .John P. Lockwood 273 A Primary Peridotite...through his career, from his thesis study on serpentinite at Schuyler, Vir¬ ginia, to his last field trip...geology and geologists of southern Africa. That region constituted one of the few outposts of vehement...band 75 miles wide but that in the surrounding region it is uniformly thick. This was baffling and remains...model comes from the Juan de Fuca Ridge region. We claim this region has two minor hot spots creating the |
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