Study sedimentology and origin of fluvial modern sediment by using integrated methods, case study of Zagros foreland Basin

Zagros foreland Basin places along with Himalyas- Alp orogeny that it is created by collision Eurasia with Arabic plane and closing Neotethys. Two rivers Karkhe and Dez are the most important Iranian rivers in which this study has examined sedimentology and their sediment origin in Zagros foreland Basin in Khuzestan province (Shush region). The most important used data in this study include Granometry data and thin section from 30 samples from two rivers and Geochemical data XRD from 2 samples and 14 samples are main elements as well as 12 samples were studied from two rivers in order to analyzing heavy minerals. The most frequent seeds of our sample are in sand and gravel that they were sort from bad to very bad. Regarding to faces and architectural elements, two meander rivers model except that Dez river has less twist. Main minerals constituent gravel sediments (carbonate gravel with more frequency and Chert gravel with less frequency) and quartz. Constituent elements and also geochemistry analysis results in analytical graphs show the origin of collision orogeny and rock recycle and weathering dry to wet weather for origin rock. Regarding to the total results, it is considered more carbonate gravel from Mishan formations, more quartz seeds from Aghajari formations and older debris formations and more heavy minerals is originated from zone of Sanandaj-Sirjan.