 | Choi, Seungsoon, Fabbri, Olivier, Topuz, Gültekin, Okay, Aral I., Jung, Haemyeong (2021) Twin Induced Reduction of Seismic Anisotropy in Lawsonite Blueschist. Minerals, 11 (4) 399 doi:10.3390/min11040399 | Journal (article/letter/editorial) | | İstanbul Teknik Üniversitesi, 34469 İstanbul, Turkey; topuzg@itu.edu.tr (G.T.); okay@itu.edu.tr (A.I...from Alpine Corsica (France) and the Sivrihisar Massif (Turkey). The CPOs of the minerals are measured...existence of twins in lawsonite from the Sivrihisar Massif (Turkey) [10,15,16], South Motagua (Guatemala)...Alpine Corsica (France) and the Sivrihisar Massif in the Tavşanlı Zone (Turkey). The main focus of this study...and eclogite [22,23,28]. The Tavşanlı Zone in Turkey is an Alpine high-pressure belt and was formed |  | | Journal (article/letter/editorial) | | suite of different rock types from the Sivrihisar Massif, Turkey, one of the few places in the world where...inherited from the protolith. Lawsonite from Sivrihisar metamafic rocks has high Sr/Pb, whereas lawsonite...eclogite- and blueschist-facies rocks is the Sivrihisar Massif of the Tavşanlı © 2019 The Authors GEOSPHERE...Plateau xenolith Dominican Republic Corsica Sivrihisar Central Pontides Kyrgyzstan Tianshan North Qilian...(±Lws pseudomorphs) Lws pseudomorph 60°S Zone, Turkey (Davis and Whitney, 2006, 2008) (Fig. 1), which |  | | Journal (article/letter/editorial) | | element mobility in subducted crust (Sivrihisar Massif, Turkey) Katherine F. Fornash, Donna L. Whitney...element mobility in subducted crust (Sivrihisar Massif, Turkey), Chemical Geology (2019), doi: https://doi...element mobility in subducted crust (Sivrihisar Massif, Turkey) Katherine F. Fornash1,2*, Donna L. Whitney2...subduction and/or incipient exhumation. In the Sivrihisar (Turkey) subduction complex, lawsonite-rich veins...the lawsonite-rich layer (Lws + Grt + Ph), its glaucophane-rich margin (Gln + Grt + Lws + Ph + Rt), and |  | | Journal (article/letter/editorial) | | petrology of high-pressure metabasalt pods, Sivrihisar, Turkey Peter B. Davis Æ Donna L. Whitney Received:...metasedimentary and metabasaltic rocks in the Sivrihisar Massif, Turkey. Some pods have a core of lawsonite eclogite...contain texturally complex garnet as well as glaucophane rims on omphacite, suggesting retrogression of...Blueschist Eclogite High-pressure Sivrihisar Turkey Introduction Eclogites commonly occur as...well-exposed high-P terrane in the Sivrihisar Massif of west-central Turkey, the pressure– temperature-deformation |  | | Journal (article/letter/editorial) | | high-pressure (P)/low-temperature (T) complex (Sivrihisar, Turkey) preserve different prograde, peak, and retrograde...assemblages that vary on a mm- to cm- scale in mode of glaucophane vs. omphacite. In contrast, metagabbro consists...or hydrous phases (lawsonite + tremolite or glaucophane) in a matrix of fine-grained lawsonite, omphacite...conditions (490–530 °C, 1.8–2.0 GPa) for both glaucophane-rich (blueschist) and omphacite-rich (eclogite)...This study is the first petrologic analysis of Sivrihisar metagabbro and the first systematic study of |  | | Journal (article/letter/editorial) | | in blueschist‑ and eclogite‑facies rocks (Sivrihisar, Turkey) Katherine F. Fornash1 · Michael A. Cosca2...exhumed NeoTethyan subduction zone (Sivrihisar Massif, Tavşanlı Zone, Turkey). Weighted mean in situ 40Ar/39Ar...eclogite- and blueschist-facies assemblages and glaucophane-rimmed lawsonite + garnet + phengite veins from...geochronology · Phengite · Eclogite · Blueschist · Sivrihisar · Subduction Introduction Communicated by Steven...from the Sivrihisar region of the Tavşanlı Zone HP/LT terrane, Turkey (Fig. 1). Sivrihisar blueschists |  | Whitney, Donna L., Fornash, Katherine F., Kang, Patricia, Ghent, Edward D., Martin, Laure, Okay, Aral I., Vitale Brovarone, Alberto (2020) Lawsonite composition and zoning as tracers of subduction processes: A global review. Lithos, 370. 105636pp. doi:10.1016/j.lithos.2020.105636 | Journal (article/letter/editorial) | | Istanbul Technical University, TR-34469, Istanbul, Turkey 6 Institut de Minéralogie, de Physique des Matériaux...Istanbul Technical University, TR-34469, Istanbul, Turkey re 6 lP Institut de Minéralogie, de Physique...have lawsonite inclusions in garnet (e.g., Sivrihisar, Turkey; Pinchi Lake, BC, Canada; Port Macquarie... These locations are: (1) the Sivrihisar Massif, Tavşanlı Zone, Turkey (C) (Fig. 6a, 7a-d); (2) the Schistes...zone, Guatemala (M) (Fig. 6b, 7e-f); (5) Voltri Massif, Western Alps, Italy (M); (6) Port Macquarie, Australia |  | WHITNEY, D. L., TEYSSIER, C., TORAMAN, E., SEATON, N. C. A., FAYON, A. K. (2011) Metamorphic and tectonic evolution of a structurally continuous blueschist-to-Barrovian terrane, Sivrihisar Massif, Turkey. Journal of Metamorphic Geology, 29 (2) 193-212 doi:10.1111/j.1525-1314.2010.00915.x | Journal (article/letter/editorial) | | continuous blueschist-to-Barrovian terrane, Sivrihisar Massif, Turkey D. L. WHITNEY,1 C. TEYSSIER,1 E. TORAMAN...blueschist-to-Barrovian terrane is the southern Sivrihisar Massif, Turkey. Late Cretaceous blueschist facies rocks...Barrovian; blueschist; exhumation; isograds; Sivrihisar; subduction; Turkey. INTRODUCTION The pre-collision oceanic... 1d). The southern part of the Sivrihisar Massif, westcentral Turkey (Fig. 2), is a spectacular example...subduction to collision transition dynamics. The massif is comprised of a sequence of metasedimentary and |  | | Journal (article/letter/editorial) | | evolution of the subduction zone. In the Sivrihisar Massif, lawsonite eclogite and garnet–lawsonite blueschist...potassium-bearing inclusions in blueschist minerals such as glaucophane (Sisson & Onstott, 1986; Ross & Sharp, 1988;...resulted from a regression through lawsonite and glaucophane in equilibrium with lawsonite and dates retrograde...Franciscan Complex of California and the Sivrihisar Massif of Turkey. Within both regions, lawsonite is well... 1968; Maruyama & Liou, 1988). (b) Sivrihisar Massif, Turkey Fig. 1. (a) Published P–T paths for Franciscan |  | | Journal (article/letter/editorial) | | Index minerals such as garnet, omphacite and glaucophane are in the geologist’s mind the essence of HP–LT...relative to minerals such as omphacite, garnet and glaucophane. This rarity of lawsonite has intrigued metamorphic...element analyses of lawsonite from the Sivrihisar Massif in Turkey, and from the Franciscan Complex. The...data from the Franciscan complex and the Sivrihisar Massif (Turkey). They show the wide applicability of...Metamorphism and preservation of lawsonite eclogite, Sivrihisar, Tuwordsrkey. Geology, 34, 473–476. © 2014 John |  | Chen, Y., Ye, K., Wu, T. F., Guo, S. (2013) Exhumation of oceanic eclogites: thermodynamic constraints on pressure, temperature, bulk composition and density. Journal of Metamorphic Geology, 31 (5) 549-570 doi:10.1111/jmg.12033 | Journal (article/letter/editorial) | | hydrous minerals, such as lawsonite, chlorite, glaucophane and talc. Along a cold subduction P–T path with...always present at 1.1 to >4.0 GPa, and chlorite, glaucophane and talc can be stable at pressures of up to...low-density HP–UHP hydrous minerals, such as glaucophane, lawsonite, paragonite, phengite, talc and chloritoid...+ lawsonite + coesite + phengite + rutile glaucophane, and their peak metamorphic P–T conditions are...assemblage of garnet + omphacite + lawsonite + glaucophane + phengite + quartz + rutile/titanite. Their |  | | Journal (article/letter/editorial) | | experiences cool, fluid-saturated conditions. For glaucophane–lawsonite eclogite facies conditions (500–600...predicted in the NCKMnFMASHO system to contain glaucophane, garnet, omphacite, lawsonite, phengite and quartz...robust geothermobarometric method for natural glaucophane-bearing eclogites. Thermobarometric results recovered...indicate that most natural glaucophane– lawsonite eclogites (Type-L) and glaucophane–epidote eclogites (Type-E)...reactions controlled by lawsonite + omphacite = glaucophane + epidote + H2O. Lawsonite and omphacite breakdown |  | Pourteau, A., Sudo, M., Candan, O., Lanari, P., Vidal, O., Oberhänsli, R. (2013) Neotethys closure history of Anatolia: insights from40Ar-39Ar geochronology andP-Testimation in high-pressure metasedimentary rocks. Journal of Metamorphic Geology, 31 (6) 585-606 doi:10.1111/jmg.12034 | Journal (article/letter/editorial) | | l€ um€ u, Tınaztepe Kampusu, Buca–Izmir, 35160, Turkey 3 Isterre, Universit e Joseph Fourier Grenoble...Afyon Zone, the Oren Unit and the southern Menderes Massif) suggest a more complicated scenario than the single-continental...Unit (HP Mesozoic cover of the southern Menderes Massif), HP retrograde stages are dated to c. 45 Ma, and...Central Alps, Wiederkehr et al., 2009; Southeastern Turkey, Oberh€ansli et al., 2012). Although this peculiar...K€ u, K€ utahya; Me, Mersin; Or, Orhaneli; Si, Sivrihisar; Ya, Yahyalı. with 93–90 Ma–old metamorphic |  | | Journal (article/letter/editorial) | | biotite, 763, 851 blueschist, 591, 715, 823 Bohemian Massif, 119, 219 calcite-aragonite transition, 603 calibration...727 geochronology, 367, 687 geodynamics, 389 glaucophane, 703 Gondwana assembly, 329 grain rotation, 353...SHRIMP U-Pb dating, 569 site-distribution, 851 Sivrihisar, 823 slab extraction, 19 Snowbird tectonic zone...THERMOCALC, 497, 715, 783 Thermodynamic, 669, 851 Turkey, 603, 823 UHT-HP metamorphism, 135 ultrahigh-pressure...and epidote eclogite and blueschist, Sivrihisar Massif, Turkey, 823 De Andrade, V., Vidal, O., Lewin |  | Fedele, L., Tramparulo, F. D'A., Vitale, S., Cappelletti, P., Prinzi, E. P., Mazzoli, S. (2018) Petrogenesis and deformation history of the lawsonite-bearing blueschist facies metabasalts of the Diamante-Terranova oceanic unit (southern Italy) Journal of Metamorphic Geology, 36 (6) 691-714 doi:10.1111/jmg.12303 | Journal (article/letter/editorial) | | chlorite; Cpx = clinopyroxene; Ep = epidote; Gln = glaucophane; Grt = garnet; Lws = lawsonite; Pl = plagioclase;...compositions ranging from glaucophane (with lesser amounts of Mg-riebeckite) to Fe-glaucophane. Though all substantially...influence only on the stability of epidote and glaucophane (both displaced to higher grades; Clarke, Powell...sample DIA3 and assuming the presence of zoisite, glaucophane and tremolite, respectively as proxies for epidote...rock. The same can be held also for the few glaucophane and pumpellyite crystals, as there is no significant |  | | Journal (article/letter/editorial) | | evolution of lawsonite eclogite in Sivrihisar; Tavşanlı Zone–Turkey Mete Çetinkaplan a,⁎, Osman Candan...Jeoloji Mühendisliği Bölümü, 35160 Buca-İzmir, Turkey b Institut für Geowissenschaften, Universitat Potsdam...platform is exposed in Western Anatolia. The Sivrihisar area east of Tavşanlı is made up of tectonic...are composed of jadeite–lawsonite–glaucophane and jadeite–glaucophane–chloritoid schists, phengite phyllites...phyllites, and calcschists with glaucophane–lawsonite metabasite layers. The blueschist-eclogite unit representing |  | | Journal (article/letter/editorial) | | sector of the metaophiolitic high-pressure Voltri Massif (Ligurian Western Alps, Italy). The study area...serpentinite channel, Ligurian Western Alps, Voltri Massif 1. Introduction Lawsonite blueschists and eclogites...north-western sector of the metaophiolitic Voltri Massif (Ligurian Western Alps, Italy). The main metagabbro...al. 2016). 2. Geological background The Voltri Massif is located at the southernmost termination of the...1996; Capponi & Crispini, 2002, 2008b). The Voltri Massif metaophiolites largely consist of serpentinites |  | Martin, L. A. J., Hermann, J., Gauthiez-Putallaz, L., Whitney, D. L., Vitale Brovarone, A., Fornash, K. F., Evans, N. J. (2014) Lawsonite geochemistry and stability - implication for trace element and water cycles in subduction zones. Journal of Metamorphic Geology, 32 (5) 455-478 doi:10.1111/jmg.12093 | Journal (article/letter/editorial) | | metasedimentary (quartzite) rocks from New Caledonia, Turkey and California. Lawsonite is a major host of REE...from key localities (New Caledonia, California and Turkey) where lawsonite has been found in subducted sediments...provided for a quartzite and an eclogite from Sivrihisar, Turkey, a key locality showing 458 L. A. J. MARTIN...Halilba gi area of the Sivrihisar massif, Tavsßanlı zone HP/LT metamorphic belt in Turkey (Whitney & Davis...and ilmenite, Table 3), lawsonite (3.5%) and glaucophane (3%). Accessory minerals include tourmaline (1%) |  | | Journal (article/letter/editorial) | | garnet, omphacite, muscovite, lawsonite, epidote, glaucophane, and natural ice in different settings in the...They discovered that the LPO of epidote and glaucophane changes with increasing shear strain. At low...low shear strain (γ ≤ 1), the [001] axes of glaucophane were subparallel to the shear direction, and the...[001] axes of Minerals 2021, 11, 1152 3 of 4 glaucophane were subparallel to the shear direction, while...important role in the formation of LPOs for glaucophane and epidote. Choi et al. [16] have investigated |  | | Report (chapter) | | sedimentary development of the Tavsanli Zone (NW Turkey): implications for rifting, passive margin development...sedimentary development of the Tavşanlı Zone (NW Turkey): implications for rifting, passive margin development... Jeoloji Bölümü, Avcılar, 34850, İstanbul, Turkey 2 School of GeoSciences, University of Edinburgh...HP/LT rocks extending NW–SE across north-western Turkey for c. 250 km (Fig. 1). The tectono-stratigraphy...in the NW and the Sivrihisar area further east (Fig. 1). The Anatolides of Turkey are traditionally subdivided |  | Plunder, Alexis, Agard, Philippe, Chopin, Christian, Pourteau, Amaury, Okay, Aral I. (2015) Accretion, underplating and exhumation along a subduction interface: From subduction initiation to continental subduction (Tavşanlı zone, W. Turkey) Lithos, 226. 233-254 doi:10.1016/j.lithos.2015.01.007 | Journal (article/letter/editorial) | | initiation to continental subduction (Tavşanlı zone, W. Turkey) Alexis Plunder, Philippe Agard, Christian Chopin...initiation to continental subduction (Tavşanlı zone, W. Turkey), LITHOS (2015), doi: 10.1016/j.lithos.2015.01...journal pertain. ACCEPTED MANUSCRIPT PT , W. Turkey) RI Alexis Plunder1,2*, Philippe Agard2,3, Christian...Istanbul Technical University, Maslak 34469 Istanbul Turkey AC CE P 5Eurasia *Corresponding author now...attested by uncommon high-pressure jadeite- RI glaucophane-chloritoid-lawsonite-bearing sedimentary and |  | Özdamar, Şenel, Billor, Mehmet Z., Sunal, Gürsel, Esenli, Fahri, Roden, Michael F. (2013) First U–Pb SHRIMP zircon and 40Ar/39Ar ages of metarhyolites from the Afyon–Bolkardag Zone, SW Turkey: Implications for the rifting and closure of the Neo-Tethys. Gondwana Research, 24 (1) 377-391 doi:10.1016/j.gr.2012.10.006 | Journal (article/letter/editorial) | | metarhyolites from the Afyon–Bolkardag Zone, SW Turkey: Implications for the rifting and closure of the...Department of Geological Engineering, İstanbul, 34469, Turkey Auburn University, College of Sciences and Mathematics...Ar/39Ar ages Neo-Tethys Gondwana margin Tectonics Turkey a b s t r a c t The Afyon–Bolkardag Zone (ABZ)...one of the most important metamorphic zones in Turkey. This zone consists of metasedimentary and metavolcanic...along with the Tavşanlı Zone, Menderes Massif, Kırşehir Massif and Lycian Nappes (Okay, 1986; Okay et |  | | Journal (article/letter/editorial) | | blueschists in tectonic mélange from the Tavşanlı Zone, Turkey: Potential constraints on the origin of Mediterranean...blueschists from the Tavşanlı zone in northwest Turkey—one of the best-preserved blueschist terranes in...belt (AHOB), especially in the Mediterranean and Turkey, mélanges that include Cretaceous blueschist have...2008; Tommasini et al. 2011). Subduction in western Turkey at ~95–90 Ma furnished the base of the Anatolide-Tauride...lawsonite blueschist samples from the Tavşanlı zone, Turkey, (2) to constrain the nature of the protoliths |  | | Journal (article/letter/editorial) | | chlorite + titanite + quartz in LBS and lawsonite + glaucophane/ferroglaucophane epidote omphacite (XJd =...from omphacite and lawsonite-absent, epidote + glaucophane/ferroglaucophane + chlorite + phengite + titanite...chlorite + glaucophane to lawsonite + albite + high-Si phengite (Si = 3.6–3.7 a.p.f.u.) + glaucophane + epidote...which are surrounded by successive layers of glaucophane schist, glaucophanite and GS. Based on prograde...alternate layers of phengite + glaucophane + epidote and glaucophane + epidote is transected by albite-bearing |  | | Journal (article/letter/editorial) | | Makran mafic blueschist in the Iranshahr area are glaucophane, phengite, quartz ±omphacite + epidote. Post...inclusions in glaucophane. The calculated P-T pseudosection for a representative metabasic glaucophane schist...reserved. Neotethys oceanic crust from eastern Turkey to Makran and the Himalayas. A main result of this...Makran zone (Figs 3 & 4). These rocks consist of glaucophane schist, ortho- and para-amphibolite, greenschist...continuation of the Sanandaj-Sirjan (Iran) and Bitlis (Turkey) micro-continent slivers (Ghazi & Hassanipak, 2000; |
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