Phytotaphonomy of Hydrocarbon Precursors, Mahakam Delta, Kalimantan

有机碳在含油气三角洲环境中的作用取决于影响生物群落的埋藏过程。从印度尼西亚Mahakam三角洲开采的原油已被证明完全来自III型干酪根（陆源和木源腐殖质有机质）。该项目的重点是识别和表征Mahakam三角洲全新世和新近纪沉积环境下陆生植物部分的积累和变化的植物共生过程。采样计划将包括从振动岩心、箱形岩心和碎屑泥炭海滩脊中恢复植物大碎屑。将对生物群落进行植被调查，以确定这些三角洲沉积物的冠层部分的主要贡献者。认识到所涉及的埋藏过程将有助于我们对有植物生长的三角洲地区大型碎屑岩的主要地点和潜在保存模式进行评估。该项目的结果将为热带低地植被在可采第三系烃的成因中所起的作用提供重要的见解。

The role of organic carbon in hydrocarbon-bearing deltaic environments is dependent upon taphonomic processes affecting resident biotic communities. Crude oils recovered from the Mahakam Delta, Indonesia, have been shown to be derived exclusively from type III kerogens (humic organic material of terrestrial and woody origin). The project is centered on the identification and characterization of phytotaphonomic processes responsible for the accumulation and alteration of terrestrial plant parts with the Holocene and Neogene depositional environments in the Mahakam Delta. The sampling program will involve recovery of plant macrodetritus from vibracores, box cores, and detrital peat beach ridges. A reconnaissance vegetational survey of biotic communities will be undertaken to identify the principal contributors of canopy parts to these deltaic sediments. The recognition of the taphonomic processes involved will contribute to our assessment of the principal sites and potential preservational modes of macrodetritus in plant- bearing deltaic regimes. Results from the project will provide significant insight into the role played by tropical lowland vegetation in the genesis of recoverable Tertiary hydrocarbons.