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Sequence stratigraphic analysis and the origins of Tertiary brown coal lithotypes, Latrobe Valley, Gippsland Basin, Australia

Abstract

Sequence analysis methods have been applied to the onshore Gippsland Basin and to the Latrobe Valley Group coal measures. In the east of the Latrobe Valley evidence for marine transgressions into the coal measures are recorded in most of the interseam sediment splits by the presence of contained foraminifer and dinoflagellates. To the west these splits pinch out into continuous coal. However, they can be followed westwards as enhanced organic sulphur levels along sharply defined boundaries between light coal lithotypes below and dark coal lithotypes above. The dark lithotype immediately overlying each of these boundaries contains the highest sulphur value and warmer climate pollen assemblages. Colorimeter and lithotype logging supports an upwards lightening cyclicity to coal colour at 12-20 m intervals through the approx. 100 m thick seams, with cycle boundaries defined at sharp planar to undulating surfaces. The lightening upward lithotype cycles together with their unique boundary conditions are interpreted as parasequences and parasequence boundaries respectively. Each major coal seam can comprise up to five parasequences and is interpreted to represent deposition during an outbuilding high stand systems tract at one of several maximum periods of Tertiary coastal onlap. Stratigraphic correlation of the sequence boundaries identified in the coal  More>>
Authors:
Holdgate, G R; Kershaw, A P; Sluiter, I R.K. [1] 
  1. Monash University, Clayton, Vic. (Australia). Dept. of Earth Sciences
Publication Date:
Nov 01, 1995
Product Type:
Journal Article
Report Number:
CONF-941088-
Reference Number:
SCA: 011000; PA: CLA-96:030909; EDB-96:033989; SN: 96001541098
Resource Relation:
Journal Name: International Journal of Coal Geology; Journal Volume: 28; Journal Issue: 2/4; Conference: Annual meeting of the Geological Society of America, Seattle, WA (United States), 24-27 Oct 1994; Other Information: PBD: Nov 1995
Subject:
01 COAL, LIGNITE, AND PEAT; BROWN COAL; LITHOTYPES; COAL DEPOSITS; STRATIGRAPHY; VICTORIA; AUSTRALIA; ORIGIN; TERTIARY PERIOD; PALEONTOLOGY; DEPOSITION; SULFUR CONTENT
OSTI ID:
183893
Country of Origin:
Netherlands
Language:
English
Other Identifying Numbers:
Journal ID: IJCGDE; ISSN 0166-5162; TRN: 960300909
Submitting Site:
NLC
Size:
pp. 249-275
Announcement Date:

Citation Formats

Holdgate, G R, Kershaw, A P, and Sluiter, I R.K. Sequence stratigraphic analysis and the origins of Tertiary brown coal lithotypes, Latrobe Valley, Gippsland Basin, Australia. Netherlands: N. p., 1995. Web. doi:10.1016/0166-5162(95)00020-8.
Holdgate, G R, Kershaw, A P, & Sluiter, I R.K. Sequence stratigraphic analysis and the origins of Tertiary brown coal lithotypes, Latrobe Valley, Gippsland Basin, Australia. Netherlands. doi:10.1016/0166-5162(95)00020-8.
Holdgate, G R, Kershaw, A P, and Sluiter, I R.K. 1995. "Sequence stratigraphic analysis and the origins of Tertiary brown coal lithotypes, Latrobe Valley, Gippsland Basin, Australia." Netherlands. doi:10.1016/0166-5162(95)00020-8. https://www.osti.gov/servlets/purl/10.1016/0166-5162(95)00020-8.
@misc{etde_183893,
title = {Sequence stratigraphic analysis and the origins of Tertiary brown coal lithotypes, Latrobe Valley, Gippsland Basin, Australia}
author = {Holdgate, G R, Kershaw, A P, and Sluiter, I R.K.}
abstractNote = {Sequence analysis methods have been applied to the onshore Gippsland Basin and to the Latrobe Valley Group coal measures. In the east of the Latrobe Valley evidence for marine transgressions into the coal measures are recorded in most of the interseam sediment splits by the presence of contained foraminifer and dinoflagellates. To the west these splits pinch out into continuous coal. However, they can be followed westwards as enhanced organic sulphur levels along sharply defined boundaries between light coal lithotypes below and dark coal lithotypes above. The dark lithotype immediately overlying each of these boundaries contains the highest sulphur value and warmer climate pollen assemblages. Colorimeter and lithotype logging supports an upwards lightening cyclicity to coal colour at 12-20 m intervals through the approx. 100 m thick seams, with cycle boundaries defined at sharp planar to undulating surfaces. The lightening upward lithotype cycles together with their unique boundary conditions are interpreted as parasequences and parasequence boundaries respectively. Each major coal seam can comprise up to five parasequences and is interpreted to represent deposition during an outbuilding high stand systems tract at one of several maximum periods of Tertiary coastal onlap. Stratigraphic correlation of the sequence boundaries identified in the coal measures to the internationally dated marine Seaspray Group, provides a basis for chronostratigraphic correlation of the coal successions to the coastal onlap charts of Haq et al (1989). It appears that each major seam is confined to high standards of third order eustatic cycles. It follows that the lithotype cycles that comprise each seam are related to fourth order eustatic cycles. 49 refs., 11 figs., 1 tab.}
doi = {10.1016/0166-5162(95)00020-8}
journal = {International Journal of Coal Geology}
issue = {2/4}
volume = {28}
journal type = {AC}
place = {Netherlands}
year = {1995}
month = {Nov}
}