Miocene Palynology of the Barito Basin, South Kalimantan  

Oleh:

Lelono, Eko Budi ; Setyaningsih, Christina Ani

Jenis: Article from Journal - ilmiah nasional
Dalam koleksi: Lemigas Scientific Contributions to Petroleum Science & Technology vol. 37 no. 01 (Apr. 2014), page 45-56.
Topik: Palynology; Miocene; Barito Basin; South Kalimantan

Ketersediaan

Perpustakaan PKPM Nomor Panggil: L15 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

Lihat Detail Induk

Isi artikel

This study has succesfully disclosed the rich assemblage of palynomorph within the Miocene sediment of the Barito Basin, South Kalimantan. It is characterised by the last occurrence of Florschuetzia trilobata (Middle/Late Miocene boundary) and the first occurrence of F. meridionalis (Early/Middle Miocene boundary). In addition, other Miocene markers appear to mark this age such as spores of Stenochlaenidites papuanus (Late Miocene) and Scolocyamus magnus (Early/ Middle Miocene). Mean while, the regular occurrence of brackish palynomorphs along the studied sections indicates marine influence during deposition including Zonocostites ramonae, Florschuetzia meridionalis (mangrove pollen), Florschuetzia levipoli and Spinizonocolpites echinatus (back-mangrove pollen). The depositional environment initially occurs in the freshwater environment of delta plain during Early to Middle Miocene (lower well sections) as suggested by domination of freshwater pollen in the absence of marine micro-fossils. It gradually shifts in to deeper marine setting in delta front to pro delta (with possible shallow marine environment) during Middle to Late Miocene (upper well sections) as indicated by the increase of brackish palynomorphs combined with marine micro-fossils. This study identifies peak of riparian pollen Myrtaceidites sp. which is potential for well correlation. This pollen is common within the lower well sections suggesting the presence of river deposits. On the other hand, considerable appearance of freshwater palynomorphs may be an indication of well development of low land forests under wet climate condition.

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