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从颗石藻、球等辫金藻300℃热模拟产物中检测出长侧链正烷基二氢化茚、烷基噻吩类化合物。二氢化茚类化合物碳数分布范围为C13～C25，nC14烷基二氢化茚的相对含量最高。没检测到茚类化合物，说明二氢化茚和茚可以源自不同的先质，生活于咸水环境的低等生物是二氢化茚类化合物的母质之一。在300℃热解产物中检测出以m/z111和125为基峰的两个系列的长侧链烷基噻吩，表明在中—高盐度环境下，藻类将无机硫转化为有机硫的生物化学作用，成为岩石抽提物和原油中的含硫化合物形成的又一途径。
Long-chain side alkyl indanes and alkylthiophenes were detected from thermal simulation products of coccolithiasis and spherulites at 300 ℃. The range of carbon number of indane compounds is C13 ~ C25, and the relative content of nC14 alkyl indane is the highest. Indina compounds were not detected, indicating that indanilide and indene can originate from different precursors. The lower organisms living in salt water environment are one of the major components of indane compounds. Two series of long-chain alkylthiophenes based on m / z 111 and 125 were detected in the pyrolyzed product at 300 ° C indicating that algae convert inorganic sulfur to organosulfur under medium-high salinity conditions Chemical action has become another avenue for the formation of sulfur compounds in rock extracts and crude oils.