Kinematics of the East Anatolian Fault Zone between Turkoglu (Kahramanmaras) and Celikhan (Adiyaman), eastern Turkey

In this study we determined the stress regime acting along the East Anatolian Fault Zone between Turkoglu (Kahramanmaras) and Celikhan (Adiyaman), from the Neocene to present-day, based on the inversion of striations measured on faults and on the focal mechanisms of earthquakes having magnitudes greater than 5.0. The inversions yield a strike-slip stress regime with a reverse component (i.e., transpression) operative in the Neocene to present with a consistent N-to NW-trending or, axis 156 +/- 11 degrees and an E- to NE-trending sigma(3) axis, sigma(7) 9 degrees sigma(3), producing left-lateral motion along the East Anatolian Fault Zone. The inversions of focal mechanisms yield a strike-slip stress deviator characterized by an approximately N-S (N1 degrees W)-trending sigma(1), and an approximately E-W (N89 degrees E)-trending sigma(3) axis. Both the kinematic analysis and structural observations indicate that the stress regime operating in the study area has had a transpressional character, giving rise to the Mio-Pliocene compressive structures (reverse faults, thrusts and folds) observed in the study area. Field observations allow estimation of a Pliocene age for the strike-slip East Anatolian Fault Zone

The effect of various production parameters on the physical properties of polypropylene meltblown nonwovens

The effect of various production parameters on the physical properties of polypropylene meltblown nonwovens Meltblowing is a versatile and cost effective process for producing microfiber nonwovens directly from thermoplastic resins. Due to their microstructure, meltblown nonwovens are characterized by lightweight, high surface area, porosity, softness and absorbency. Different types of meltblown nonwoven webs can be used in many application fields, such as: filtration, insulation, apparel, wipes and in medicine. In this paper, the effect of various production parameters on the physical properties of PP meltblown nonwovens was investigated

Ozone bleaching of denim fabrics

Classic denim jeans are generally fabrics having indigo-dyed warp threads. Depending on the desired effect, a bleaching process can be carried out for denim fabrics. Suitable alternatives for oxidative bleaching with sodium hypochlorite and potassium permanganate are not currently available. Some potential alternatives (e.g., peroxide, glucose, and enzymatic bleaching with laccase) are relatively expensive. In this paper, ozonation of denim fabric was investigated as an ecological and practical bleaching alternative. Due to its effective oxidizing potential, denim fabric was treated with ozone; sufficient bleaching results were obtained in a very short time

Evidence for ∼80-75 Ma subduction jump during Anatolide-Tauride-Armenian block accretion and ∼48 Ma Arabia-Eurasia collision in Lesser Caucasus-East Anatolia

International audienceOrogens formed by a combination of subduction and accretion are featured by a short-lived collisional history. They preserve crustal geometries acquired prior to the collisional event. These geometries comprise obducted oceanic crust sequences that may propagate somewhat far away from the suture zone, preserved accretionary prism and subduction channel at the interplate boundary. The cessation of deformation is ascribed to rapid jump of the subduction zone at the passive margin rim of the opposite side of the accreted block. Geological investigation and 40Ar/39Ar dating on the main tectonic boundaries of the Anatolide-Tauride-Armenian (ATA) block in Eastern Turkey, Armenia and Georgia provide temporal constraints of subduction and accretion on both sides of this small continental block, and final collisional history of Eurasian and Arabian plates. On the northern side, 40Ar/39Ar ages give insights for the subduction and collage from the Middle to Upper Cretaceous (95-80 Ma). To the south, younger magmatic and metamorphic ages exhibit subduction of Neotethys and accretion of the Bitlis-Pütürge block during the Upper Cretaceous (74-71 Ma). These data are interpreted as a subduction jump from the northern to the southern boundary of the ATA continental block at 80-75 Ma. Similar back-arc type geochemistry of obducted ophiolites in the two subduction-accretion domains point to a similar intra-oceanic evolution prior to accretion, featured by slab steepening and roll-back as for the current Mediterranean domain. Final closure of Neotethys and initiation of collision with Arabian Plate occurred in the Middle-Upper Eocene as featured by the development of a Himalayan-type thrust sheet exhuming amphibolite facies rocks in its hanging-wall at c. 48 Ma