Chamley, Hervè; Robert, Christian; Müller, Daniel W (1993): Clay mineral assemblages for the last 10 Ma off northeastern Australia [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.786568, Supplement to: Chamley, H et al. (1993): The clay-mineralogical record of the last 10 million years off northeastern Australia. In: McKenzie, JA; Davies, PJ; Palmer-Julson, A; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 133, 461-470, https://doi.org/10.2973/odp.proc.sr.133.247.1993
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Abstract:
Clay mineral assemblages for the last 10 m.y. are described for Site 823, at 16°S in the Queensland Trough, to the northeast of Australia. Largely unaffected by diagenetic influences, these mostly express the evolution of northeastern Australian continental environments during the late Neogene: (1) beginning during the late Miocene at about 7.0 Ma is an increase of illite derived from rocky substrates at the expense of smectite from deeply weathered soils; this increase was the result of increasing aridity in the Australian interior and globally cooler temperatures, associated with increases in Antarctic glaciation; (2) concomitant and further increases of kaolinite fluxes to the Queensland Trough during the late Miocene-early Pliocene largely reflect an increase in rainfall in northeastern Australia; (3) increases in both soil- and rock-derived minerals probably intensified as a result of late Neogene uplift of the eastern highlands; (4) clay-mineral associations during the Pliocene and Pleistocene display minor variations only and probably resulted in part from differential settling and sea-level changes; (5) similar trends of clay-mineral variations occur at both ODP Site 823 and DSDP Site 588 (Lord Howe Rise). Less abundant kaolinite relative to illite at Site 588 nevertheless suggests a southward decrease of continental humidity and/or of the eastern highlands uplift; (6) influences of global climate and oceanic and atmospheric circulations on clay-mineral associations dominated during the late Miocene and were progressively replaced by influences of more regional environmental variations during the Pliocene and especially the Pleistocene.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -16.591583 * Median Longitude: 146.935670 * South-bound Latitude: -16.647000 * West-bound Longitude: 146.289500 * North-bound Latitude: -16.445000 * East-bound Longitude: 148.157600
Date/Time Start: 1990-09-10T01:24:00 * Date/Time End: 1990-10-07T00:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Chamley, H; Robert, C; Müller, DW (1993): (Table 2) Mean distribution of clay minerals and range of main species in the lithologic units of ODP Site 133-823. https://doi.org/10.1594/PANGAEA.786565
- Chamley, H; Robert, C; Müller, DW (1993): (Table 3) Clay mineralogy of selected surficial samples of a wets-east transect off northeastern Australia. https://doi.org/10.1594/PANGAEA.786567