6 comments on The Bullroarer - Sunday 3 August 2008
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6 comments on The Bullroarer - Sunday 3 August 2008
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GAIA Host Collective
So the poor petrol heads can't afford to burn up the highways these days - tragic.
I wonder how long it will be before the retards in state governments in QLD and VIC realize just how inappropriate it is to subsidize the likes of the Indy on the Gold Coast and the Grand Prix in Melbourne.
Interesting that there are geothermal prospects around St Arnoud.Could the New England batholith,which stretches over 400 km from Stanthorpe to Tamworth and is at least 100 km wide, be prospective?
New England doesn't appear on the map... Presumably the rocks have cooled too much?
from Big Gav's "Geothermia" (http://anz.theoildrum.com/node/3215)
That graphic shows deep hot rocks. Its probably not complete either - the Hunter Valley is also hot I think, as are parts of Tassie and even some locations near Adelaide.
I got the impression the guys in the story are after more traditional geothermal, at much smaller depths, so a hot rock map isn't the right one to use.
Gav, I'm very supportive of geothermal, and I'm also keen to learn more about it, but I think that little dot marked "Sydney Basin" on the map above is indeed the Hunter Valley "anomaly" near Muswellbrook that is controlled by Geodynamics.
(See small pdf = http://www.environment.gov.au/settlements/renewable/recp/hotdryrock/pubs...)
It doesn't sound to me like the whole Hunter Valley is underlain by this resource, just a 20km blob of granite about 5km underground in the Upper Hunter. (And it may need fracturing (http://www.abc.net.au/rn/science/earth/stories/s18546.htm) whereas the Cooper Basin already has good natural fractures and they have already got steam pressure between their wells.
Nonetheless, what a lucky stroke that these Hunter hot rocks are right under our existing NSW power generation and transmission infrastructure! I hope that Geodynamics make a go of it.
Thirra - the other point which Geodymnamics seem to emphasise in their latest quarterly report...
(http://www.geodynamics.com.au/IRM/content/shareholder_mediaroom.html)
... is that the hot rocks need an "insulating blanket" of about 3km of sedimentary rock on top to trap the heat. So presumably those New England granites sticking out into the rain, wind and snow are a bit of a lost cause.
;-)
Thanks for following that up.
I'll still note we need to distinguish between regular geothermal, low temp geothermal (ala the Birdsville power plant) and hot rock geothermal - and not to forget passive geothermal, for those in colder locations.
Despite the various motorsport carnivals of speed, I would think that their use of petrol (both by the entrants and the spectators) pales into comparison with activities like taking the kids to Dreamworld, husbands going fishing every weekend, or making an extra trip to the supermarket because you 'need' a loaf of Helgas Multigrain and Pumpernickle bread for Sunday lunch.
Anecdotally, I don't see much evidence of a curtailment of car clubbing. There's always massive 4WD's in the Carlovers wash bay getting cleaned after a bout of enivronmentally-friendly mudbogging, the Harley club hammering past my house, hoons (atypically, usually middle-aged men rather than teenagers), and people treating the roads asa racetrack (I've nearly been involved in a good dozen accicents in the last month as people race around me so they can be first to the next red light, and aren't looking where they're going).
Obviously, fuel prices aren't causing enough pain yet (local servo says they're still selling the same amount of fuel they used to, but 'in-store' purchases (of overpriced mars Bars and the like) are down).