古质，汉语词汇。 拼音：gǔ zhì 释义：古雅质朴。
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.
这说明它们是在地幔柱轴部，由地幔岩和榴辉岩(古玄武质洋壳)组成的源区产生的岩浆形成的。
The evidences indicate that the magmas are formed by melting of pyrolite and eclogite (ancient basaltic oceanic crust) in the axial zone of mantle plume.
摘要生物标志化合物在石油地质中应用广泛，可应用于源岩有机质类型和古沉积环境评价以及热演化阶段的确定等。
Biomarker has a wide application in the research of petroleum geology, such as different types of organics thermal evolution, ancient sediments' environment and so on.
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