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Bathymetric mapping is the first step in any underwater and sea bed investigation, especially for petroleum exploration. In most we face with a complex of sand and gravel covering the bottom of the sea. Differentiate these two type of seafloor covering material is the case of many research in offshore exploration. In this article We investigated a practical case history to define and show the differences of sand and gravel in their images. The images were obtained by the Yellow-Fin side scan sonar instrument and p...

This paper is devoted to geological and geophysical exploration of Sarband graphite deposits in Markazi province of Iran includes Khanadarreh Bala and Vesmestan deposits. Geological methods include trenching and drilling test pits and exploratory holes, sampling and analyzing with XRD and chemical analysis. This method show that Khanadarreh Bala deposits has purer graphite than Vesmestan and hosted in schistisited rocks and has higher continuity than Vesmestan deposit. Geophysical methods include SP ,mise-a-la-mas...