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One hundred and twenty-five rock and oil samples collected from the Fangzheng Fault Depression were analyzed by GC–MS. Principal component analysis (PCA) and multidimensional scaling (MDS) based on nine biomarker ratios were used for oil–source rock correlation in this region. The oils are characterized by a predominance of low to middle molecular weight normal alkanes (n-C12–n-C20 or n-C12–n-C25),...
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