http://jsci.khu.ac.ir Quarterly Journal of Science Kharazmi University - Journal articles for year 2008, Volume 18, Number 46 Yektaweb Collection - https://yektaweb.com en 2008/4/13 http://ndea10.khu.ac.ir/jsci/browse.php?a_id=1196&sid=1&slc_lang=en Torud fault is located in 110 Km away from the south of Damghan and trends ENE-WSW that is approximately E-W at its west end. In this termination region, observed structures indicate a special aspect of strike-slip fault terminations. These structures are of two sets: the first set are structures trending approximately N-S and are mainly compressional ones such as thrust faults and folds both verging to the east. These structures are in Paleozoic and Mesozoic rocks. Right lateral and normal shear structures, microfolds, foliations, and lineations are also associated with them. The second set are structures having NE-SW direction and include open gentle folds and younger thrusts which both verge to the south. They are mainly in Cenozoic and younger rocks but have made notable changes in older rocks too. Direction of Torud Mountain and its surrounding faults to direction of Arabia –Eurasia convergence, and effects of rotation and compression of Lut block and movements of its surrounding faults, led to transpressional deformation in the area under studyThe direction of slip in this system was related to tactors that were mentioned above and has been changed in response to the local changes of stress field.Strain in some locations has been partitioned into two components: shearing and compression. They operated contempo-rarily or in two separate times. Other minor structures such as Reidel and P shears and folds of wrench tectonic also exist as they are predictable in shear zones. http://ndea10.khu.ac.ir/jsci/browse.php?a_id=1197&sid=1&slc_lang=en To investigate the optimum synthesis conditions and formation of ZSM-5 zeolite without using template , Samples of ZSM-5 zeolites were prepared under different conditions without using any template. The synthesis conditions were varied over a vast range of pH, temprature, SiO2/Al2O3 ratio, and reaction time. The formation of ZSM-5 crystals and relative crystallinity of these samples were determined by XRD, the results were compared for optimum condition. For determination of crystsllinity by XRD, different ways of calculations were employed and the results of each way were compared with the results obtained by other instruments lik SEM and a fast and accurate way of relative crystallinity measurement by XRD has been taken into account. http://ndea10.khu.ac.ir/jsci/browse.php?a_id=1198&sid=1&slc_lang=en The granitoidic masses from northeast of the Golpayegan area were intruded in a metamorphic complex of Barrovian type and the some area caused contact metamorphism in the adjacent rocks. These masses in the QAP triangular diagram consist of tonalite, granodiorite, granite, alkali feldspar granite, monzogranite, quartz diorite, quartz monzonite and quartz monzodiorite. The aplitic and pegmatitic dykes can also be observed on the rim of these masses. The textures of granitoids are mainly based on primary textures [1)granitic texture, 2)poikilitic texture, 3)granophyric texture] and secondary textures[1)perthitic intergrowths, 2)myrmekite, 3)chloritization 4)sericitiza-tion, 5)kaolinitization]. Fabric and mineralogical study of granitoids show that the presence of k-feldspar mega crystals and rounded zircons could probably indicate the characteristics of S-type granitoids or granitoids with crustal origin. But presence of granophyric texture in some of tonalites shows that these masses are plagiogranite type which is considered as I-type granitoids or the granitoids with mantle origin. Presence of mylonitic texture in some other granitoids which have outcrops in the northeast Golpayegan (north of Varzaneh and Sfajerd villages) show that these masses were formed during an orogenic phase (Laramid). Based on studies conducted on conodont fossils obtained from crystallized calc schists and acrytarge in slates of the area which are introduced for the first time in Sanandaj-Sirjan Zone, the age of the metamorphic rocks, that previously were documented as Precambrian, was reviewed and show that they belongs to Paleozoic. Thus, the age of granitoids from the north of Golpayegan was considered younger than late Jurassic and older than Oligocene. In this paper, based on field observations and paleontological studies, the age of granitoids from the north of Golpayegan emplacement were documented for the first time. Thus, throgh studing the texture and age of the granitoidic masses from the Golpayegan area, it could be concluded that some of these masses (granophyric granitoids or I-type) were formed during Jurassic and initial Cretaceous and synchronous with subduction and before continental collision, and some other masses (mylonitic granitoids) were formed during continental collision and synchronous with the end of deformations at the end of orogenic events. Some others (often S-type granitoids), finally, were formed in late Cretaceous-Paleocene after collision of the Arabian plate with the Iranian plate at the end of Cretaceous. http://ndea10.khu.ac.ir/jsci/browse.php?a_id=1199&sid=1&slc_lang=en z http://ndea10.khu.ac.ir/jsci/browse.php?a_id=1200&sid=1&slc_lang=en The Gurpi Formation, at the type section (NW of Masjed-Soleiman) and in Sabze-kuh (SW of Borujen) are lithologically subdivided into 8 and 11 units, respectively. The study of planktonic foraminifera resulted in recognition of 7 biozones in Lali area and 4 biozones in Sabzeh-kuh area. These biozones are compared to the most standard biozones defined in Tethysian domain. Biozones I (Globotruncanita elevata Zone), II (Globotruncana ventricosa Zone) and III (Globotruncanita calcarata Zone) suggest the Early, Middle and Late Campanian, respectively. Biozones IV (Globotruncanita stuarti Zone) and V (Globotruncana aegyptica zone) represent Late Campanian. Biozone VI (Gansserian gansseri Zone) show Late Campanian-Early Maastrichtian and biozone VII (Abathomphalus mayaroensis) indicates Late Maastrichtian. In Sabze-kuh area, due to the decrease in water depth in Maastrichtian, biozones V, VI and VII were not recognized. Changes in water depth during the Campanian and Maastrichtian had a very important role in the distribution of planktonic foraminifera. In the early Late Campanian and Late Maastrichtian with decreasing of water depth, the globular, unkeeled planktonic foraminifera dominates the fauna. In the Late Campanian and during the Early Maastrichtian with increasing of water depth, the keeled foraminifera forms a significant portion of the planktonic foraminifera. http://ndea10.khu.ac.ir/jsci/browse.php?a_id=1201&sid=1&slc_lang=en In this research work, alpha particle detector is made using semi-insulating GaAs. A surface barrier detector with a semi-insulating GaAs substrate at room temperature with pressure of 10-4 Torr under -particle radiation with 5.48 Mev of Am241 source, have been under investigation. Energy resolution of 2 and 3 mm schottky diameter have been matured and compared with the effect of voltage variation