OC/N ratio and δ15N both altered significantly due to diagenesis,so OC/N ratio can help discriminate the sources of organic matter in sedimentδ15N can not be used to indicate the origins of the organic matter,and δ13Corg can be a reliable proxy to the sources of organic matter.
用二元混合模型對(duì)有機(jī)地球化學(xué)指標(biāo)之間的關(guān)系進(jìn)行模擬,結(jié)果表明珠江口和近海沉積物樣品OC/N與δ15N在早期成巖過(guò)程中均發(fā)生了較大改變,OC/N可用作判斷有機(jī)質(zhì)來(lái)源的輔助證據(jù),而δ15N不宜用作沉積有機(jī)質(zhì)來(lái)源的指示。
