A tectonic model for the onshore Kutai basin, East Kalimantan, based on an integrated geological and geophysical interpretation

Chambers, John L. C.; Daley, T.

doi:10.29118/ipa.614.111.130

Cited by 13 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…16f), related to propagation of deformation from Sulawesi during the late Upper Miocene (Rangin, 1990;Clennell, 1996). The compression may have contributed to the creation of tight anticlines between individual sub-basins similar to those reported from the Kutai Basin of Kalimantan (Chambers and Daley, 1995). Following its uplift during the Pliocene, intense erosion eroded the tight anticlines, leaving apparent circular basins or synclinal remnants (outliers).…”

Section: Tectonic Evolution Of the Maliau Basinmentioning

confidence: 71%

Structural geology of the Neogene Maliau Basin, Sabah

Tongkul¹,

Chang²

2003

BGSM

View full text Add to dashboard Cite

The Maliau Basin (Maliau outlier) is made up of about 7,500 metres thick sandstone and mudstone layers deposited in a deltaic-coastal environment, assigned the Kapilit Formation. The layers at the base of the basin consist mainly of mudstones reaching up to 2,000 metres thick. Near the rim of the basin, thick sandstone layers and coal seams occur. Towards the centre of the basin a series of sandstone-dominated and mudstone-dominated sequences of various thicknesses occur. The deposition took slight unconformity place during the Middle Miocene (10-15 million years ago). The basin sits with slight unconformity on older sedimentary rocks (Tanjong Formation), also comprising of thick layers of sandstone and mudstone. The orientation of bedding generally follows the semi-circular shape of the basin. The dip of bedding varies from 5-10 degrees at the centre to 45-50 degrees at the rim. Subvertical to vertical fractures shows four main fracture orientations, NW-SE, NE-SW, NNW-SSE and WNW-ESE. Faulting is quite rare inside the basin. However, outside the basin, minor normal faults occur trending E-W and NE-SW. A sheared zone occurs at the southeastern part of the basin, possibly due to a major fault, the Lonod Fault. Based on regional and local structures the Maliau Basin is interpreted to have. developed initially in an extensional regime, whereby an enormous amount of sediments were deposited in a subsiding basin and later subjected to compression (inversion).

show abstract

Section: Tectonic Evolution Of the Maliau Basinmentioning

confidence: 71%

Structural geology of the Neogene Maliau Basin, Sabah

Tongkul¹,

Chang²

2003

BGSM

View full text Add to dashboard Cite

show abstract

“…In central Borneo there is data for strong uplift within N8 times, equivalent to the III to IV boundary (Chambers & Daley, 1995;Guritno & Chambers, 2000;Cloke et al, 1999), by inversion of old graben-bounding faults.…”

Section: Integration Of Results With Regional Geologymentioning

confidence: 99%

A review of the Sarawak Cycles: History and modern application

Lunt¹,

Madon²

2017

BGSM

View full text Add to dashboard Cite

This review examines the history of the Sarawak "Cycles" and their application in subdividing offshore Cenozoic stratigraphy. The Cycles are widely but inconsistently used, at least in part because important reports and data collections were never published (e.g. Geiger, 1964;Hageman et al., 1987; Hageman maps, 1985, eventually reproduced in Madon, 1999and Hutchison, 2005and Taylor et al., 1997) or were published in highly abridged summaries only (Ho Kiam Fui, 1978;Mansor et al., 1999). The lack of a data-audit trail left open possibilities for ambiguity and confusion, as has been commented on by several workers (e.g. Snedden et al., 1995;Ismail & Tucker, 1999). This account reviews the major contributions, published and unpublished, and the concepts of the Cycles, especially over times of geological change. The data behind the model is cited in order to give confidence when integrating Sarawak stratigraphic data into a regional geological model. The Cycles began with an assumption that transgressions over regressive surfaces were distinct and approximately synchronous events for correlation. By including biostratigraphic data these transgressive events could be traced into clay-dominated areas, where lithological and seismic contrast was weak. This integrated approach was carried out through the 1970's and 80's, during which time the data pushed the model towards a three dimensional view of sedimentation, with the basin shape evolving and changing through time. However, development of a full tectono-stratigraphic model paused during the period of accelerated seismic capabilities of the 1990's and early 21 st Century. While geophysical data coverage increased, application of geological analyses decreased, and the integrated approach lost momentum. This review aims to re-establish the role of the Cycles as a part of a large scale geological model. An initial integration with regional geological events is attempted, linking some of the Cycle boundaries with times of known tectonic change. 78beyond the main Neogene clinoform, in deep water, with no Luconia reefs. Finally, onshore there was uplift where an older Miocene trend has been over-printed by a later Miocene uplift that is parallel to the present day coastline. In the coastal and nearshore areas there is strong reverse faulting, so this southern area, with its own distinct geological history, is called the Tinjar province.The challenge was how to correlate, and predict facies into un-drilled areas, in this broad region of sedimentation, with its gradual trend from coastal plain sediments in the south to open marine environments in the north, and how to correlate from clastic to carbonate facies in order to combine their sedimentological histories HISTORY OF STUDIESThe tools required to identify different facies in Sarawak sediments were developed early on, but the ability to correlate and thereby map facies variation at a specific time has always been challenging. Age diagnostic fossils occurred only rarely and consequently indicated only a general age, and ...

show abstract

“…Western Sulawesi rifted away from Borneo, forming the Makassar Straits (Hamilton, 1979;Situmorang, 1982;Cloke et al, 1999), probably as a result of the opening of the Celebes Sea (Weissel, 1980;Hall, 1996). Graben and halfgraben developed along the margins of the Makassar Straits, with major faults predominantly down to the west (Evans, 1991;Chambers and Daley, 1997;Calvert, 2000), and were filled with terrestrial to marine sediments (Fig. 8a).…”

Section: Subordinate Volcanic Rocks Of Basic To Intermediate Compositmentioning

confidence: 97%