Mantle Helium-3 in Geothermal Power

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	Mantle Helium-3 in Geothermal Power

Moonowler

3-27-2008 8:32 PM

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tags:

chemistry, water, earth, nevada

Moonowler says:

The geochemists examined the ratio of helium-4 (the garden-variety helium that lifts birthday balloons) and its rarefied cousin, helium-3. The earth's crust contain just one helium-3 atom for every 100 million atoms of helium-4. But helium-3 is a thousand times more common in the earth's mantle.

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/e1f4382a-3951-44c5-964a-8c6e82ab3b3a/BFB56E38-B265-419A-A955-DE84B90E9C93/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.technologyreview.com/Energy/19891/?nlid=746" href="http://www.technologyreview.com/Energy/19891/?nlid=746" style="font-size: 11px;">www.technologyreview.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.technologyreview.com/Energy/19891/?nlid=746"><P id="dek">Helium isotopes reveal hidden stores of geothermal energy.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.technologyreview.com/Energy/19891/?nlid=746"><B>Smelling land:</B> Elevated levels of helium in the water pumping through 
this geothermal power plant in Nevada’s Dixie Valley could be a clue into 
finding hidden geothermal hot spots. </blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.technologyreview.com/Energy/19891/?nlid=746">Most geothermal power plants exploit the relatively rare but easy to spot hot 
water associated with volcanoes, limiting geothermal energy to a niche role in 
meeting global energy demand. It works well in Iceland and a few other places, 
but geothermal energy is a largely untapped resource in much of the world, in 
part because, in the absence of a volcano or hot springs, it's hard to find the 
right spot to tap into the resource.</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.technologyreview.com/Energy/19891/?nlid=746">Water is more likely to circulate rapidly through such regions, providing the 
circulation of heat emanating from the earth's mantle or generated in its crust 
by radioactive decay.</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.technologyreview.com/Energy/19891/?nlid=746">Currently, geothermal systems supply less than 1 percent of that demand.</blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/BFB56E38-B265-419A-A955-DE84B90E9C93/blog/" title="blog or email this clip"><img src="http://content8.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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