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在青海湖沉积物中检出了含有２～４个双键的长链（Ｃ３７－Ｃ４０）甲基和乙基脂肪酮。这是世界沉积于碱性环境和各种不同盐度条件下（耳海，淡水；青海湖，半咸水；尕海，咸水）的近代湖泊沉积物中的长链不饱和脂肪酮的首次详细报导。许多地球化学家广泛用这些化合物经过计算公式来估算海洋沉积物的古温度。如果对这些化合物估算海洋沉积物古温度的计算公式进行适当校正，那么也可用这些化合物来推知湖泊沉积物的古温度。
Long chain (C37-C40) methyl and ethyl aliphatic ketones containing 2 to 4 double bonds were detected in sediments of Qinghai Lake. This is the first time that the world has seen the deposition of long chain unsaturated aliphatic ketones in recent lake sediments in alkaline environments and at various salinities (riparian, freshwater; Qinghai Lake, brackish water; Gahai, brackish water) Detailed report. Many geochemists use these compounds extensively to calculate the palaeoclimate of marine sediments. If these compounds are properly calibrated to calculate the paleo-temperature of marine sediments then these compounds can also be used to deduce the palaeoclimate of lake sediments.