Mike,
You are correct in thinking the deeper you go the hotter it is. I
went into a French salt mine many years ago. I was dressed for cold
weather
at the surface but as we descended in a narrow shaft elevator I could it
getting hotter and it was decidedly hot at the bottom!
Hot springs also come from deeper depths and contain different
minerals than those that occur at shallower depths. However, I suppose
this latter also depends on the geological depositions (Paleozoic,
Mesozoic, Tertiary, Miocene, etc.)and how close these deposits are to the
surface.
Bea
On 10/8/01 4:35 AM Mike O'connor writes:
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>Cris,
> Sorry for the late reply but have been away for a couple of months.
>I recall talking to miners many years ago that the deeper on went the
>warmer the earth. Although which depths give what temperatures I am sure
>must depend upon the geology.
>I know that there is a system of building heating that involves pumping
>water via a pipe down into deep boreholes and recovering the the warmer
>water returning to the surface. This warmer water is passed into heat
>exchanger (like a fridge in reverse) to put even hotter water into
>buildings.
> Mike
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>Cris Ebbs <[log in to unmask]> on 14/08/2001 09:44:36
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>Please respond to for students of holy wells and waterlore
> <[log in to unmask]>
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> To: [log in to unmask]
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> cc: (bcc: Mike O'connor/MAIN/MC1)
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> Subject: Temp changes with depth ?
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>Can anyone offer any information on the following:
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>A powerful underground spring (cave passage) was intersected by a mine
>tunnel at a depth below surface of 700 feet in 1917 in North Wales and this
>water now enters the tunnel from both east and west sides. The temps of the
>two inlets are 48 deg.F and 56 deg.F.
>1) This variation suggests that one inlet comes from a deep seated source,
>if so does anyone know if the temp directly infers depth and if so, what
>depth in this case ?
>2) What else might explain this temp. difference ?
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>I am a caver/mine explorer who has been searching for new caves by
>following natural underground water courses.
>Any help would be much appreciated.
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>Thanks Cris
>(See attached file: att1.htm)
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Beatrice Hopkinson 73071,327@compuserve
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