Distributed transpressive continental deformation: The Varto Fault Zone, eastern Turkey

The convergence between the Eurasian and Arabian plates has created a complicated structural setting in the Eastern Turkish high plateau (ETHP), particularly around the Karlıova Triple Junction (KTJ) where the Eurasian, Arabian, and Anatolian plates intersect. This region of interest includes the junction of the North Anatolian Shear Zone (NASZ) and the East Anatolian Shear Zone (EASZ), which forms the northern border of the westwardly extruding Anatolian Scholle and the western boundary of the ETHP, respectively. In this study, we focused on a poorly studied component of the KTJ, the Varto Fault Zone (VFZ), and the adjacent secondary structures, which have complex structural settings. Through integrated analyses of remote sensing and field observations, we identified a widely distributed transpressional zone where the Varto segment of the VFZ forms the most northern boundary. The other segments, namely, the Leylekdağ and Çayçatı segments, are oblique-reverse faults that are significantly defined by uplifted topography along their strikes. The measured 515 and 265 m of cumulative uplifts for Mt. Leylek and Mt. Dodan, respectively, yield a minimum uplift rate of 0.35 mm/a for the last 2.2 Ma. The multi-oriented secondary structures were mostly correlated with “the distributed strike-slip” and “the distributed transpressional” in analogue experiments. The misfits in strike of some of secondary faults between our observations and the experimental results were justified by about 20° to 25° clockwise restoration of all relevant structures that were palaeomagnetically measured to have happened since ~ 2.8 Ma ago. Our detected fault patterns and their true nature are well aligned as being part of a transpressional tectonic setting that supports previously suggested stationary triple junction models.

Management of a complication with a fractured zirconia implant abutment in the esthetic zone

Technical complications in implant prosthetic cases represent a major challenge in dentistry. This case report describes minimally invasive management to recover an implant with a fractured remnant of a zirconia abutment, including provisional rehabilitation during a sequential treatment protocol in the esthetic zone. A patient was treated with a screw-retained one-piece implant-supported reconstruction made of a customized zirconia abutment with direct ceramic veneering in the maxillary right central incisor position. During the prosthetic try-in, a fracture in the apical portion of the abutment was evident. The first rescue attempt led to fracture of the retrieval instrument. Immediately, an individualized wired construction was applied to bond the existing fractured reconstruction to the neighboring teeth to maintain the peri-implant mucosal architecture. Because the implant screw canal was blocked, a customized round bur had to be manufactured and was placed in the implant axis with a specific bracket tool from the service set to protect the interior implant threads. Then, the drills of the service set were guided by the newly created access to remove the fractured remnants. The implant screw was retapped and the area rinsed with chlorhexidine solution. All remnants were removed without the need for surgical intervention. Neither the implant connection nor the bone-to-implant interface was damaged. The stepwise treatment approach with the customized round bur combined with the system-specific drills of the service set saved the blocked implant so that the patient could be successfully rehabilitated with a new implant reconstruction.

Immediate implant placement with simultaneous guided bone regeneration in the esthetic zone: 10-year clinical and radiographic outcomes.

AIM To associate the dimension of the facial bone wall with clinical, radiological, and patient-centered outcomes at least 10 years after immediate implant placement with simultaneous guided bone regeneration in a retrospective study. MATERIAL AND METHODS Primary endpoint was the distance from the implant shoulder (IS) to the first bone-to-implant contact (IS-BIC10y ). Secondary endpoints included the facial bone thickness (BT10y ) 2, 4, and 6 mm apical to the IS, and the implant position. At baseline, the horizontal defect width (HDWBL ) from the implant surface to the alveolar wall was recorded. At recall, distance from the IS to the mucosal margin (IS-MM10y ), degree of soft tissue coverage of the mesial and distal aspects of the implants (PISm10y , PISd10y ; Papilla Index), pocket probing depth (PPD10y ), and patient-centered outcomes were determined. Width of the keratinized mucosa (KM), Full-Mouth Plaque and Bleeding Score (FMPS, FMBS) were available for both time points. RESULTS Of the 20 patients who underwent immediate implant placement with simultaneous guided bone regeneration and transmucosal healing, nine males and eight females with a median age of 62 years (42 min, 84 max) were followed up for a median period of 10.5 y (min 10.1 max 11.5). The 10-year implant survival rate was 100%. Multivariate regression analysis revealed a correlation of the IS-BIC10y , controlled for age and gender, with four parameters: HDWBL (P = 0.03), KMBL -10 (P = 0.02), BT10 4 mm (P = 0.01), and BT10 6 mm (P = 0.01). CONCLUSION Within the conditions of the present study, the horizontal defect width was the main indicator for the vertical dimension of the facial bone. The facial bone dimension was further associated with a reduction in the width of the keratinized mucosa and the dimension of the buccal bone.

Constraints on the thermal evolution of the Adriatic margin during Jurassic continental break-up: U–Pb dating of rutile from the Ivrea–Verbano Zone, Italy

The Ivrea–Verbano Zone (IVZ), northern Italy, exposes an attenuated section through the Permian lower crust that records high-temperature metamorphism under lower crustal conditions and a protracted history of extension and exhumation associated partly with the Jurassic opening of the Alpine Tethys ocean. This study presents SHRIMP U–Pb geochronology of rutile from seven granulite facies metapelites from the base of the IVZ, collected from locations spanning ~35 km along the strike of Paleozoic fabrics. Rutile crystallised during Permian high-temperature metamorphism and anatexis, yet all samples give Jurassic rutile U–Pb ages that record cooling through 650–550 °C. Rutile age distributions are dominated by a peak at ~160 Ma, with a subordinate peak at ~175 Ma. Both ~160 and ~175 Ma age populations show excellent agreement between samples, indicating that the two distinctive cooling stages they record were synchronous on a regional scale. The ~175 Ma population is interpreted to record cooling in the footwall of rift-related faults and shear zones, for which widespread activity in the Lower Jurassic has been documented along the western margin of the Adriatic plate. The ~160 Ma age population postdates the activity of all known rift-related structures within the Adriatic margin, but coincides with extensive gabbroic magmatism and exhumation of sub-continental mantle to the floor of the Alpine Tethys, west of the Ivrea Zone. We propose that this ~160 Ma early post-rift age population records regional cooling following episodic heating of the distal Adriatic margin, likely related to extreme lithospheric thinning and associated advection of the asthenosphere to shallow levels. The partial preservation of the ~175 Ma age cluster suggests that the post-rift (~160 Ma) heating pulse was of short duration. The regional consistency of the data presented here, which is in contrast to many other thermochronometers in the IVZ, demonstrates the value of the rutile U–Pb technique for probing the thermal evolution of high-grade metamorphic terrains. In the IVZ, a significant decoupling between Zr-in-rutile temperatures and U–Pb ages of rutile is observed, with the two systems recording events ~120 Ma apart.

Impact of Taylor-Aris diffusivity on analyte and system zone dispersion in CZE assessed by computer simulation and experimental validation.

Application of pressure-driven laminar flow has an impact on zone and boundary dispersion in open tubular CE. The GENTRANS dynamic simulator for electrophoresis was extended with Taylor-Aris diffusivity which accounts for dispersion due to the parabolic flow profile associated with pressure-driven flow. Effective diffusivity of analyte and system zones as functions of the capillary diameter and the amount of flow in comparison to molecular diffusion alone were studied for configurations with concomitant action of imposed hydrodynamic flow and electroosmosis. For selected examples under realistic experimental conditions, simulation data are compared with those monitored experimentally using modular CE setups featuring both capacitively coupled contactless conductivity and UV absorbance detection along a 50 μm id fused-silica capillary of 90 cm total length. The data presented indicate that inclusion of flow profile based Taylor-Aris diffusivity provides realistic simulation data for analyte and system peaks, particularly those monitored in CE with conductivity detection.

Age, Growth and Population Structure of Jumbo Flying Squid, Dosidicus Gigas, Based on Statolith Microstructure Off the Exclusive Economic Zone of Chilean Waters

The jumbo flying squid, Dosidicus gigas, support an important squid fishery off the Exclusive Economic Zone of Chilean waters. However, we only have limited information about their biology. In this study, age, growth and population structure of D. gigas were studied using statoliths from 333 specimens (386 females and 147 males) randomly sampled in the Chinese squid jigging surveys from 2007 to 2008 off the Exclusive Economic Zone of Chile. Mantle lengths (MLs) of the sample ranged from 206 to 702 mm, and their ages were estimated from 150 to 307 days for females and from 127 to 302 days for males. At least two spawning groups were identified, the main spawning peak tended to occur between August and November (austral spring group), and the secondary peak appeared during March to June (austral autumn group). The ML-age relationship was best modelled by a linear function for the austral spring group and a power function for the austral autumn group, and the body weight (BW)-age relationship was best described by an exponential function for both the groups. Instantaneous relative growth rates and absolute growth rates for ML and BW did not differ significantly between the two groups. The growth rate of D. gigas tended to be high at young stages, and then decreased after the sub-adult stage (>180 days old). This study suggests large spatial and temporal variability in key life history parameters of D. gigas, calling for the collection of more data with fine spatial and temporal scales to further improve our understanding of the fishery biology of D. gigas.

Na 1 Nachlass Max Horkheimer, 707 - "German Refugees from Eastern Zone" (p. IX 183.1-2 - IX 184.2-18)

"German Refugees from the Eastern Zone" 1952; 1. "Outline of a Pilot Study of German Refugees from the Eastern Zone Who are presently in Berlin" a) Typoskript, 4 Blatt; b) Typoskript, 3 Blatt; 2. "Budget for a Pilot Study of German Refugees from the Eastern Zone in Berlin" a) 2 Blatt; b) 1 Blatt; c) 1 Blatt; d) 1 Blatt; "Universität und Gesellschaft" 1952-1956; 1. "Universität und Gesellschaft" Teil III: Expertenbefragung. Forschungsbericht, 1953; als Typoskript vervielfältigt und gebunden, 77 Blatt; 2.-7. Allgemeine Darstellung der Untersuchungen; 2. "Einige wichtige Ergebnisse der Universitätsstudie", 1956. Als Typoskript vervielfältigt, 5 Blatt; 3. "Vorläufige Gliederung für den Bericht der Hochschul-Untersuchung" 2 Blatt; 4. "The German University of Today. Progress Report on a Research Project" 02.11.1955 a) Typoskirpt, 12 Blatt; b) Typoskript mit handschriftlichen Korrekturen, 12 Blatt; 5. "The German University of Today. A Progress Report on a Research Project" a) Typoskript, 7 Blatt; b) Typoskript mit handschriftlichen Korrekturen, 8 Blatt; c) Typoskirpt mit handschriftlichen Korrekturen, 12 Blatt; 6. "Funktion und Wirklichkeit der Universität heute. Zwischenbericht über drei Studien des Instituts für Sozialforschung an der Johann Wolfgang Goethe- Universität". Typoskript, 25 Blatt; 7. "Pläne einer Untersuchung über die Vorstellung von der Finktion der heutigen deutschen Universität bei bestimmten Personenkreisen" a) Typoskirpt, 11 Blatt; b) Typoskript, 11 Blatt; 8.-10. Studentenbefragung; 8. Fagebogen zur Umfrage "Warum studieren Studenten?", als Typoskript vervielfältigt, 19 Blatt; 9. "The Economic Situation of Students at the Johann Wolfgang Goethe- University in Frankfurt am Main" Resultate der Umfrage vom Winter 1952/43; Januar 1956; a) Typoskript, 43 Blatt; b) 43 Blatt; 10. "Students and Parentl Influence. Results of a Survey" a) Typoskript, 25 Blatt; b) Typoskript mit handschriftlichen Korrekturen von Frederick Pollock, 25 Blatt; 11.-14. Aktennotizen; 11. "Bericht über die Verhandlungen zwischen Herrn Professor Baumgarten, Tenbruck und Habermas am 12.12.1956 im Institut für vergleichende Sozialwissenschaften in Stuttgart. Betreff: Professorenstudie" 13.13.1956 vermutlich 13.03.1956. Typoskript, 2 Blatt; 12. Gembardt, Ulrich: Aktennotiz zur Hochschuluntersuchung. 23.05.1955, Typoskript, 3 Blatt; 13. Gembardt, Ulrich: Bemerkungen zur Aktennotiz vom 23.05.1955, Typoskript, 2 Blatt; 14. "Aktennotiz über die Hochschul-Forschungsprojekte des Göttinger Soziologischen Seminars und des Frankfurter Institut für Sozialforschung, die deim Hauptausschuß der Deutschen Forschungsgemeinschaft am 1. August 1953 zur Finanzierung vorgelegt werden" 20.07.1953. Typoskript, 2 Blatt; 15.-18. Briefe; 15. Löwenthal, Leo: 1 Brief mit Unterschrift an MAx Horkheimer, New York, 20.01.1955, 3 Blatt; 16. Horkheimer, Max [?]: 1 Brief an Chauncy D. Harris, ohne Ort, Januar 1955; a) Typoskirpt, 1 Blatt; b) Typoskirpt mit handschriftlichen Korrekturen, 1 Blatt; c) Typoskirpt mit handschriftlichen Korrekturen, 1 Blatt; d) Typoskirpt, 1 Blatt; 17. Horkheimer, Max: Drei gleichlautende Briefe an die Rektoren der Universität Bonn, Heidelberg und Koel, ohne Ort, 15.11.1953; a) Typoskript, 6 Blatt; b) Typoskript mit eigenhändigen KOrrekturen, 3 Blatt; 18. Plessner, Helmuth: 1 Brief mit Unterschrift mit Beilage an Max Horkheimer, Göttingen 02.07.1953, 4 Blatt;

(Table 1) K-Ar age of alkaline igneous rocks from the Jan Mayen fracture zone

Bottom morphology of the Jan Mayen transform fracture zone and rock chemistry data show that petrological and chemical specific features of igneous rocks can result from higher permeability of the transform fracture zone and deeper penetration of ocean water into the lithosphere in comparison with rift zones of the Kolbeinsey and Mohn's mid-ocean ridges. Age of alkaline magmatism of the Jan Mayen fracture zone is similar to that of rift zones due to palingenesis of metamorphosed and hydrated mantle and crustal rocks.