This map is produced fro the Australian Fisheries Management Authority to assist in their enforcement of Australia's Maritime Bounadries. It has an explanation of the maritime boundaries and their coordinates in the Arafura Sea and Torres Strait. Originally produced using the Indonesian language. This version is an English translation. It is not for sale or public release by Geoscience Australia. Public release is thru DEH and AFMA.

This map is produced for the Australian Fisheries Management Authority to assist with their enforcement of Australia's Maritime Boundaries. On this side is an explanation of the applicable maritime boundaries and a list of their coordinates in the Timor and Arafura Seas. Originally produced using the Indonesian language. This version is an English translation. It is not for sale or public release by Geoscience Australia. Public release is thru DEH and AFMA.

This map is produced fro the Australian Fisheries Management Authority to assist in their enforcement of Australia's Maritime Bounadries. It has an explanation of the maritime boundaries and their coordinates in the Arafura Sea and Torres Strait. Originally produced using the Indonesian language. This version is an English translation. It is not for sale or public release by Geoscience Australia. Public release is thru DEH and AFMA.

This map is produced fro the Australian Fisheries Management Authority to assist in their enforcement of Australia's Maritime Bounadries. It has lots of icons to explain to Indonesian fishermen where that can and cannot fish in the Arafura Sea and Torres Strait. Originally produced using the Indonesian language. This version is an English translation. It is not for sale or public release by Geoscience Australia. Public release is thru DEH and AFMA.

This map is produced for the Australian Fisheries Management Authority to assist with their enforcement of Australia's Maritime Boundaries. On this side is an explanation of the applicable maritime boundaries and a list of their coordinates in the Timor and Arafura Seas. Originally produced using the Indonesian language. This version is an English translation. It is not for sale or public release by Geoscience Australia. Public release is thru DEH and AFMA.

Australia's nickel sulfide industry has had a fluctuating history since the discovery in 1966 of massive sulfides at Kambalda in the Eastern Goldfields of Western Australia. Periods of buoyant nickel prices and high demand, speculative exploration, and frenetic investment (the 'nickel boom' years) have been interspersed by protracted periods of relatively depressed metal prices, exploration inactivity, and low discovery rates. Despite this unpredictable evolution, the industry has had a significant impact on the world nickel scene with Australia having a global resource of nickel metal from sulfide ores of not, vert, similar 12.9 Mt, five world-class deposits (> 1 Mt contained Ni), and a production status of number three after Russia and Canada. More than 90% of the nation's known global resources of nickel metal from sulfide sources were discovered during the relative short period of 1966 to 1973. Australia's nickel sulfide deposits are associated with ultramafic and/or mafic igneous rocks in three major geotectonic settings: (1) Archean komatiites emplaced in rift zones of granite-greenstone belts; (2) Precambrian tholeiitic mafic-ultramafic intrusions emplaced in rift zones of Archean cratons and Proterozoic orogens; and (3) hydrothermal-remobilized deposits of various ages and settings. The komatiitic association is economically by far the most important, accounting for more than 95% of the nation's identified nickel sulfide resources. The ages of Australian komatiitic- and tholeiitic-hosted deposits generally correlate with three major global-scale nickel-metallogenic events at not, vert, similar 3000 Ma, not, vert, similar 2700 Ma, and not, vert, similar 1900 Ma. These events are interpreted to correspond to periods of juvenile crustal growth and the development of large volumes of primitive komatiitic and tholeiitic magmas caused by large-scale mantle overturn and mantle plume activities. There is considerable potential for the further discovery of komatiite-hosted deposits in Archean granite-greenstone terranes including both large, and smaller high-grade (5 to 9% Ni) deposits, that may be enriched in PGEs (2 to 5 g/t), especially where the host ultramafic sequences are poorly exposed. Analysis of the major komatiite provinces of the world reveals that fertile komatiitic sequences are generally of late Archean (not, vert, similar 2700 Ma) or Paleoproterozoic (not, vert, similar 1900 Ma) age, have dominantly Al-undepleted (Al2O3/TiO2 = 15 to 25) chemical affinities, and often occur with sulfur-bearing country rocks in dynamic high-magma-flux environments, such as compound sheet flows with internal pathways facies (Kambalda-type) or dunitic compound sheet flow facies (Mt Keith-type). Most Precambrian provinces in Australia, particularly the Proterozoic orogenic belts, contain an abundance of sulfur-saturated tholeiitic mafic ± ultramafic intrusions that have not been fully investigated for their potential to host basal Ni-Cu sulfides (Voisey's Bay-type mineralization). The major exploration challenges for finding these deposits are to determine the pre-deformational geometries and younging directions of the intrusions, and to locate structural depressions in the basal contacts and feeder conduits under cover. Stratabound PGE-Ni-Cu ± Cr deposits hosted by large Archean-Proterozoic layered mafic-ultramafic intrusions (Munni Munni, Panton) of tholeiitic affinity have comparable global nickel resources to many komatiite deposits, but low-grades (< 0.2% Ni). There are also hydrothermal nickel sulfide deposits, including the unusual Avebury deposit in western Tasmania, and some potential for 'Noril'sk-type' Ni-Cu-PGE deposits associated with major flood basaltic provinces in western and northern Australia.

Global gold resource endowment of geological regions in Australia based on aggregate past gold production and current resources.

The pore water chemistry of mud volcanoes from the Olimpi Mud Volcano Field and the Anaximander Mountains in the eastern Mediterranean Sea have been studied for three major purposes: 1) modes and velocities of fluid transport were derived to assess the role of (upward) advection, and bioirrigation for benthic fluxes. 2) Differences in the fluid chemistry at sites of Milano mud volcano (Olimpi area) were compiled in a map to illustrate the spatial heterogeneity reflecting differences in fluid origin and transport in discrete conduits in near proximity. 3) Formation water temperatures of seeping fluids were calculated from theoretical geothermometers to predict the depth of fluid origin and geochemical reactions in the deeper subsurface. No indications for downward advection as required for convection cells have been found. Instead, measured pore water profiles have been simulated successfully by accounting for upward advection and bioirrigation. Advective flow velocities are found to be generally moderate (3-50 cm y- 1) compared to other cold seep areas. Depth-integrated rates of bioirrigation are 1-2 orders of magnitude higher than advective flow velocities documenting the importance of bioirrigation for flux considerations in surface sediments. Calculated formation water temperatures from the Anaximander Mountains are in the range of 80 to 145 °C suggesting a fluid origin from a depth zone associated with the seismic decollement. It is proposed that at that depth clay mineral dehydration leads to the formation and advection of fluids reduced in salinity relative to sea water. This explains the ubiquitous pore water freshening observed in surface sediments of the Anaximander Mountain area. Multiple fluid sources and formation water temperatures of 55 to 80 °C were derived for expelled fluids of the Olimpi area.

Porosity and saturation are two important petrophysical properties among many others that play a crucial role in the study of reservoir characterization, flow modeling, simulation etc. Well logging techniques supplemented with geostatistical methods could provide a very high resolution estimate of those properties; but it becomes severely constrained due to availability of limited number of wells only at sparse locations. An overall estimate of porosity and saturation over a wide spatial extent (both vertically and laterally) is nonetheless necessary for a detailed study of a reservoir. We demonstrate that full waveform inversion of prestack seismic data can be a useful tool in estimating porosity and saturation of a reservoir. We conduct sensitivity analysis of porosity and saturation on seismic velocities. We use modified Biot-Gasmann equations for sensitivity analysis and forward modeling computation. A gradient-based technique aided with adaptive regularization is used for inverse modeling of full-waveform prestack seismic data. We present the results of numerical experiment on both synthetic and field seismic data.

No abstract available