ACRES Update, Issue 22, December 2000 ACRES Archive a National Resource First MODIS poster of Australia

ACRES Update, Issue 21, July 2000 Terra Oberving the Earth New Product Catalogue Remote Sensing and emergency management

No abstract available

This second edition, coming after the first one published in 1990, has been entirely revised in order to show a clear distinction between sedimentary, volcanic extrusive, and endogenous dated formations. The geology of the oceans has been also updated according to the most recent magnetic and satellite-gravimetric data. Positions of the main volcanoes and meteoritic craters were added to the map. The new cartographic conception of the map allows a rapid visual reconstruction of the main plates and sub-plates of the global tectonics. This geological wall map is the only one existing today that presents the world geological setting at a glance. There is a clearly distinguishable contrast between the continents - whose rocks may attain an age up to nearly 4 billion years&endash; and the oceanic crust - whose age does not exceed 200 million years.

Titles in this newsletter: Nutrients from sediments: Implications for algal blooms in Myall Lakes More sources for gas and oil in Perth Basin: Study highlights potential for multiple petroleum systems The importance of the 'backend' to online delivery of geoscience information Minerals laboratory staff develops new ICP-MS preparation method Bonaparte Basin: Geochemical characteristics of hydrocarbon families and petroleum systems Customised regolith maps incorporate hydrologic modelled attributes for geochemical exploration Publications involving AGSO authors:May-November 2000

Composition and Dynamics of Holocene Sediment next to the Whitsunday Islands on the middle shelf of the Great Barrier Reef Platform, Australia. Unpublished PhD Thesis, James Cook University.

No abstract available

A WET Labs SAFire multi-spectral and absorption meter was used to identify dissolved poly-aromatic hydrocarbons and anomalous biological activity in near surface waters. Over 6000 km of data were collected southwest of Noumea. No obvious hydrocarbon anomalies were detected but blue-green algal blooms (Trichodesmium ?), identified also by satellite and biological analysis (Dupouy et al, 2000), were commonly encountered in the survey area. An extremely high absorption anomaly centred at 162.7 deg E and 22.7 deg S, with a strong algal fluorescence signature at 440 nm excitation, is also likely to be from the same source.

This report describes gravity surveys conducted in Western Australia during 1991 and 1993, to establish new Absolute and Australian Fundamental gravity control stations in new areas and where existing fundamental gravity stations had been lost.

As part of the North Pilbara NGMA Project, AGSO (now Geoscience Australia), together with Newcastle University and the Geological Survey of Western Australia (GSWA), have been conducting a research program to document the geological setting, characteristics and genesis of Au deposits of the North Pilbara Terrane. This record summarises some results of this research program. This research has concentrated on turbidite-hosted lode Au deposits in the Indee and Nullagine areas as well as basalt and ultramafic-hosted deposits in the Mt York-Lynas Find area. In addition to these areas, AGSO's research also concentrated on epithermal deposits in the Indee area, and less detailed studies were undertaken on lode Au deposits at Gold Show Hill and Klondyke. This research program was designed to complement recent (e.g., Neumayr et al. [1993; 1998] on the York deposits and Zegers [1996] on the Bamboo Creek deposits) and ongoing (e.g., D. Baker, University of Newcastle] at Mt York-Lynas Find) programs conducted at the other institutions. This Pilbara Gold Record is supported by an extensive GIS dataset, providing many new digital data sets, including a number of variations of the magnetics, gravity, and gamma-ray spectrometry. A solid geology map, and derivative maps, mineral deposits, geological events, and Landsat 5-TM provide additional views. This data set complements the 1:1.5 Million scale colour atlas (Blewett et al., 2000).