Characteristics of Cepu Block Oil, Wonocolo Formation, East Java Indonesia: Study of aliphatic biomarkers

Organic Geochemical Characteristics of Ngrayong Formation Polaman Sediment Rock, Northeast Java Basin-Indonesia

“…The medium chain confirmed the contribution of bacteria, algae, and machropyte, including the submerged and floating ones. In addition, the vascular plant as the source of organic matter was affirmed by the long-chain alkane [14][15][16][17][18][19][20].…”

“…The abundance of alkane and isoprenoid is illustrated in Table 2. This table explains several parameters, i.e., carbon preference index (CPI), odd/even predominance (OEP), low-to-high chain carbon preference index (LHCPI), Pr/Ph, Pr/n-C 17 , Ph/n-C 18 , [19,21]. The maturity, organic matter source, and sediment were represented by the parameters mentioned in Table 3.…”

“…2). Paq values < 0.1 were for vascular plants, 0.1-0.4 for emergent macrophytes, and 0.4-1.0 for submerged/floating macrophytes [11,16,[18][19]. Coal samples from PLM 1-4 were indicated to originate from [29].…”

“…The relationship of organic matter sources with aquatic and terrestrial environments was evaluated through the TAR parameter, which was obtained from the ratio of the total n-alkanes C 27 , C 29 , and C 31 to the total nalkanes C 15 , C 17 , and C 19 . The TAR value of PLM 2 was 36.92, indicating a higher contribution of vascular plants in the terrestrial environment [11,19]. Parameter LMW/HMW was calculated by comparing the abundance of n-alkane ≤ C 21 with n-alkane ≥ C 21 as well as coastal sediments of St. Lawrence Estuary and Gulf, Quebec, Canada [30].…”