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Articles by M. Khalili
Total Records ( 3 ) for M. Khalili
  S.A. Tabatabaie , H. Ziari and M. Khalili
  In the present study, a temperature model and a resilient modulus model of asphalt pavements are developed for tropical zones of Iran. Through the investigation of asphalt mixtures reactions to temperature increase, a mathematical model is developed. This model makes the prediction of asphalt course temperature in various depths (with different parameters) possible. Twenty-four samples were made with different mix designs and located in settings that a real pavement experiences in its service life in tropical zones. Four variables that were considered for making samples are bitumen percent, bitumen type, level of compaction and gradation of aggregates. By means of gathering the samples` temperatures in three different depths and corresponding air temperatures for nine months a data base was made by which the model was developed. Using indirect tensile tests in three different temperatures, the resilient modulus of samples similar to the samples of study were measured to develop the model. The results show that there is a significant correlation between three out of four variables of the study and predicted temperatures. The variables are bitumen percent, bitumen type and level of compaction. Moreover, it was found that, besides temperature, bitumen type is the only variable that appears in the resilient modulus model.
  Z. Tahmasbi , M. Khalili , A. Castro and A. Ahmadi
  Microgabbrodiorite, microdiorite and less than microgranodiorite enclaves occur in the Astaneh pluton. These enclaves have I-type mineral assemblages that are broadly similar to those in the host granitoids except for the greater abundance of mafic minerals, such as amphibole. They show various features formed by magma mixing/mingling environment: abundant subrounded shape, sharp but partly diffuse contact with host granitoids, finer grain size than host granites, more mafic small enclave in large enclave, ocellar quartz, acicular apatite, poikilitic textures and pargasitic amphibole in dacitic enclave. Indeed geochemistry evidences and enclaves normalized against their host granodiorites show that magma mingling occurred.
  Z. Tahmasbi , M. Khalili and A. Ahmadi-Khalaji
  The Astaneh area belongs to the Sanandaj-Sirjan Zone (SSZ) in Western Iran. The igneous rocks in this area consist of tonalite, granodiorite, monzogranite and subvolcanic rocks (rhyodacites). The mineral chemistry and microprobe analysis of mineral assemblages in these rocks indicate that the magma in this area has a metaluminous to slightly peraluminous composition, related to calc-alkaline, arc-type magmas and displays features typical of I-type granitoids. Also, the average of minimum pressure is estimated at 1.37 kbars in tonalites whereas the maximum pressure is 6.58 kbars in pargasite in dacitic enclaves. The maximum temperature is 767 °C in pargasitic amphibole crystallized in dacitic enclave whereas the minimum temperature is 650 °C in tonalite. All analyzed samples have log fO2 in the range between -13 (in dacitic enclave) to -18.3 (in tonalite ) and -15 (in tonalitic enclave), respectively, which show this magma crystallized in high fO2. The presence of phenocrysts of plagioclase (An = 80-90) together with plagioclase (An = 35-40), pargasitic amphibole in dacitic enclave and oscillatory zoned plagioclase in rhyodacites might be accounted for by a magma mixing model in the subvolcanics of Astaneh.
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