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LRMA News 21 October 2008

OPAL RESEARCH


The Australian Research Council has agreed it was time to invest some funds to unravel the secret of an Australian icon. University of Sydney’s Patrice Rey and Adriana Dutkiewicz have secured funding of close to a quarter of million dollars over the next three years to investigate the origin of Australian opal deposits.

Some miners would remember Patrice from the 2005 and 2003 Opal Symposiums in Lightning Ridge and Quilpie.

Project Aims:


Investigate the role macroscopic and microscopic structural features associated with major opal fields play in the formation of precious opal.
Investigate the impact of intraplate (palaeo)-stresses and dynamic topography on the unique geological setting of the opal deposits.
Constrain fluid geochemistry and subsurface conditions under which opal forms using fluid inclusions in opal and associated cements, as well as opal and host rock geochemistries and use this information to elucidate the evolution and migration pathway of the opalising fluid.
Establish the role microbes play in the formation of opal by extracting paleofluids preserved within fluid inclusions in the opal.
Determine the age of opal genesis using direct U-Pb, 230Th-U and (U-Th)/He SHRIMP dating of opal deposits.
They are keen to collaborate with as many people as possible on the various aspect of the opal problem and will be looking for opal samples and the opportunity to visit mine sites. The project will commence next year and they will keep everyone up to date with where they are up to and all results will be made public. The LRMA will be strongly supporting this project and will be looking for samples and mines to visit when the time comes.

STUDENTS VISIT


We have had two groups of University students visit Lightning Ridge over the past couple of weeks. The first group were from the geology Department of the Australian National University in Canberra under the guidance of John Mavrogenes who some might remember as Katie Dowell’s supervisor.

The second group were here last weekend from ParisTech, Paris, France and were studying either geology or mining engineering. In both cases the students were taken underground, to an open cut, processing site, cutting demonstration and a talk on opal fossils. Thank you very much to the miners who volunteered their services and their claims, Fred Mallouk, Peter Drackett, Drago Panich, Aaron Bruce, Jenni Brammall and Elizabeth Smith, Daniela L’abbate and Christine Roussell. All the students had a fantastic time and we continue to spread the word about opal far and wide. Hopefully we can encourage some students to undertake some research work on opal in their honour’s year.






Group of University students from ParisTech, France viewing the Jag Hill open cut.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Maxine O'Brien
Secretary/Manager
Lightning Ridge Miners' Association Ltd
PO Box 177, Lightning Ridge NSW 2834
Ph: 02 6829 0427, Fax: 02 6829 0830
Mob: 0427 920 474
Email: lrma@lightningridge.net.au


21 October 2008 08:40pm
LRMA News 15 October 2008

WYOMING TITLES


The Department of Primary Industries has notified all claimholders on Wyoming of their obligations under the Access Management Plan (AMP) determined by the Mining Warden some months ago. It is important to read the AMP carefully and some of the most important things to keep in mind is that there is to be no traffic on Wyoming before sunrise or after sunset. It is also vital that miners stay on the designated tracks marked on the plan and take the shortest and most practicable route from those tracks to their claim and share the same track with other claimholders.

When a new field is found and a new primary track need to be created this first must be negotiated with the landholder in writing or you can ask the LRMA to negotiate on your behalf.

All claimholders will be required to complete a Mines Operation Plan for their title and as these need to be sent to Orange for approval it could take a week or two so it may be best to plan in advance. The LRMA are currently discussing ways of speeding up the process with the Department.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Maxine O'Brien
Secretary/Manager
Lightning Ridge Miners' Association Ltd
PO Box 177, Lightning Ridge NSW 2834
Ph: 02 6829 0427, Fax: 02 6829 0830
Mob: 0427 920 474
Email: lrma@lightningridge.net.au

15 October 2008 04:33pm