沉积岩的有机质丰度低，基本无有效生油岩发育。
The organic matter abundance of sedimentary rock is low, and there is basically no effective source rock.
水主要来源于古海水和大气降水，有机质来源于沉积岩中生物质；
The water mostly comes from ancient sea and atmosphere while organic material from ancient life-form.
在分析岩浆活动特征及其形成的构造环境的基础上，探讨了研究区沉积岩系及其中有机质的热变质作用。
The authors made a discussion on the thermometamorphism of sedimentary rocks and their organic matters in the area, according to the magmatic activities and their tectonic environment.
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