STUDI PALEOGEOGRAFI MIOSEN AWAL CEKUNGAN SUMATRA TENGAH BERDASARKAN DATA SUMUR DAN BIOSTRATIGRAFI

RAMADHANA, BIMO SAJJAD (2025) STUDI PALEOGEOGRAFI MIOSEN AWAL CEKUNGAN SUMATRA TENGAH BERDASARKAN DATA SUMUR DAN BIOSTRATIGRAFI. Skripsi thesis, UPN Veteran Yogyakarta.

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Abstract

ABSTRAK
STUDI PALEOGEOGRAFI MIOSEN AWAL
CEKUNGAN SUMATRA TENGAH BERDASARKAN DATA SUMUR
DAN DATA BIOSTRATIGRAFI
Oleh
Bimo Sajjad Ramadhana
NIM: 111210105
Program Studi Sarjana Teknik Geologi
Daerah penelitian ini berada di Cekungan Sumatra Tengah (CSB) yang merupakan cekungan
belakang busur (back arc basin) yang berkembang sepanjang tepi paparan sunda di
Baratdaya Asia Tenggara. Studi ini bertujuan untuk merekonstruksi kondisi paleogeografi
Miosen Awal di Cekungan Sumatra Tengah dengan menganalisis data log sumur, side wall
core (SWC), dan biostratigrafi. Studi ini dilakukan pada delapan sumur (JAD 1 hingga JAD
8) yang dianalisis secara kualitatif melalui interpretasi elektrofasies, analisis litologi,
biostratigrafi, dan korelasi stratigrafi. Hasil analisis menunjukkan dominasi endapan
batupasir dengan pola elektrofasies cylindrical, dan bell-shaped yang mengindikasikan
lingkungan fluvial braided, hingga tidal channel. Korelasi antar sumur berdasarkan marker
SB 25 dan SB 22 menunjukkan keselarasan stratigrafi serta perubahan fasies lateral dari barat
laut ke tenggara. Data biostratigrafi mendukung interpretasi lingkungan pengendapan dari
supratidal hingga subtidal. Integrasi seluruh data memungkinkan penyusunan dua fase
model paleogeografi, yaitu transgressive systems tract (TST) dan highstand systems tract
(HST), yang mencerminkan dinamika sedimentasi akibat perubahan muka air laut regional.
Kata kunci: Biostratigrafi, Elektrofasies, Litologi, Paleogeografi, Stratigrafi
vi
ABSTRACT
A PALEOGEOGRAPHIC STUDY OF THE EARLY MIOCENE IN THE
CENTRAL SUMATRA BASIN BASED ON WELL AND
BIOSTRATIGRAPHIC DATA
By
Bimo Sajjad Ramadhana
NIM: 111210105
(Geological Engineering Undergraduated Program)
The study area is located in the Central Sumatra Basin (CSB), a back-arc basin that
developed along the edge of the Sunda Shelf in southwestern Southeast Asia. This study aims
to reconstruct the Early Miocene paleogeographic conditions in the Central Sumatra Basin
by analyzing well log data, side wall core (SWC) descriptions, and biostratigraphic data.
The research was conducted on eight wells (JAD 1 to JAD 8) using a qualitative approach
through electrofacies interpretation, lithological analysis, biostratigraphy, and stratigraphic
correlation. The analysis results indicate a dominance of sandstone deposits with cylindrical
and bell-shaped electrofacies patterns, suggesting depositional environments ranging from
braided fluvial systems to tidal channels. Well-to-well correlation based on the SB 25 and
SB 22 sequence boundaries shows stratigraphic consistency and lateral facies changes from
northwest to southeast. Biostratigraphic data support the interpretation of depositional
environments from supratidal to subtidal zones. The integration of all datasets enables the
construction of two paleogeographic models, representing the transgressive systems tract
(TST) and highstand systems tract (HST), which reflect sedimentation dynamics driven by
regional sea-level fluctuations.
Keywords: Biostratigraphy, Electrofacies, Lithology, Paleogeography, Stratigraphy
vii

Item Type:	Tugas Akhir (Skripsi)
Uncontrolled Keywords:	Biostratigraphy, Electrofacies, Lithology, Paleogeography, Stratigraphy
Subjek:	Q Science > QE Geology
Divisions:	Fakultas Teknologi Mineral dan Energi > (S1) Teknik Geologi
Depositing User:	Eko Yuli
Date Deposited:	18 Nov 2025 01:14
Last Modified:	18 Nov 2025 01:14
URI:	http://eprints.upnyk.ac.id/id/eprint/45486

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