Characterization of Source Rock Sediments from Test Well GGAG#699 Located in Gandhar Oil Field of Gujarat Petroliferous Basin, India, using 57Fe Mössbauer Spectroscopy.

⁵⁷Fe Mössbauer spectroscopic studies on deep subsurface sediments collected from test well GGAG#699 located in Gandhar oil field of Cambay basin, Gujarat is reported. It is found that iron if mainly present in some clay (both in high spin Fe²⁺ and Fe³⁺ state) along with fluctuating amount of pyrite and siderite. The distribution trend of iron bearing minerals can provide useful information about redox environment and in estimating the quality of source rocks in sediments. [ABSTRACT FROM AUTHOR]