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翻译：A third means of assessing the maturity of rocks is by the pyrolysis of a small amount of the source rock. The temperature is raised rapidly and the material vaporized or formed by thermal breakdown of the kerogen is passed through a detector which records, on a temperature base, peaks representing these two bursts of volatile material. To a first approximation the peak at the lower temperature represents oil already generated; the peak at the higher temperature indicates oil capable of being generated at adequate maturity.
【参考答案】
评价岩石成熟度的第三个办法是源岩的裂解程度。温度迅速升高，物质被气化或发生热裂解，通过探测器记录温度曲线，描述挥发性物质......
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