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Herman Darman
SHELL Indonesia
Earth & Planetary Sciences

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An Overview of Tectonic and Sedimentation Inter-relationship F. Hasan Sidi; Herman Darman
Berita Sedimentologi Vol 9, No 1 (1998)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2693.849 KB) | DOI: 10.51835/bsed.1998.9.1.281

Abstract

For more than a century geoscientists had related tectonic to sedimentation by associating geosynclines with thick accumulations of sedimentation. Until the middle of 20th century, sedimentary basins were still rationalized and classified in terms of geosynclinal theory, including the publication of "Geology of Indonesia" in 1949 by R.W. van Bemmelen. The advent of plate tectonic theory led to a revival interest of tectonic and sedimentation since the development of this theory had provided fresh perspectives to build and constraint models of deep lithospheric behavior. Most of the sedimentary basins can now be explained in terms of plate-margin processes and consequently make the structure and stratigraphy have become more understandable. The plate tectonic theory demonstrated that one of the most important controls on sedimentation and deformation is the position of a sedimentary basin relative to either a plate or a continent-ocean boundary.
Magnetostratigraphy: A Summary Herman Darman; Edy Sunardi
Berita Sedimentologi Vol 8, No 1 (1998)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2151.963 KB) | DOI: 10.51835/bsed.1998.8.1.283

Abstract

Magnetostratigraphy is the element of stratigraphy that deals with the magnetic characteristics of rock units, obtained by measuring the direction and intensity of magnetism in rocks of different ages. The magnetic characteristic most often used, however, is the polarity of magnetic remanence. The polarity is said to be "normal" (north-seeking magnetization gives a northern hemisphere pole, as today) or "reverse" (north-seeking magnetization gives a southern hemisphere pole). The polarity is established from isolating of the primary remanent magnetism of the sample, using paleomagnetic investigation.Magnetostratigraphy defines the sequence of geomagnetic polarity reversals recorded during deposition of a geological formation. This approach can be a very valuable technique for the subsurface correlation of marine and continental sequences and is the only correlation technique which is independent of any facies control. It provides an important complement to biostratigraphy for core correlating and dating. In general the rock magnetic stratigraphy involves the utilization of magnetic properties of sediments and sedimentary rocks as a means of (1) stratigraphic correlation, (2) identification of sediment sources and transport mechanism, (3) characterization/detection of paleoenvironmental change.
Fluvial Sandstone Reservoir Connectivity Herman Darman
Berita Sedimentologi Vol 6, No 1 (1997)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1629.151 KB) | DOI: 10.51835/bsed.1997.6.1.297

Abstract

This essay discusses the conduits and partitions of the fluvial rocks which are controlled by the depositional origin. Some reservoirs of producing hydrocarbon fields are reviewed to show some cases of the hydrocarbon recovery processes.
Co-Authors Edy Sunardi F. Hasan Sidi