footwall spays

English translation: footwall: the gological structure supporting the ore/deposit, also: underlining or ledger wall. Splay

GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
English term or phrase:footwall spays: footwall splays
Selected answer:footwall: the gological structure supporting the ore/deposit, also: underlining or ledger wall. Splay
Entered by: juvera

09:03 Mar 28, 2005
English language (monolingual) [PRO]
Tech/Engineering - Mining & Minerals / Gems
English term or phrase: footwall spays
"At shallow depths within the orebody the advanced grade control RC drilling has intersected shallow dipping north plunging oreshoots which correspond to the intersection between the main shear zone and footwall spays"
Fanny Thuiller
Local time: 21:37
footwall: the wall or rock on the underside of the deposit, spay: splay
Explanation:
The footwall is the geological structure supporting the ore/deposit.
They also call it the underlining wall or ledger wall. When they mine the ore, the top of it becomes the "floor" of the shaft.
Spay: I am convinced, they meant splay, which means, that the footwall is widening, splaying out.
Here is a mining glossary.
www.meridiangold.com/glossary.cfm

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Note added at 4 hrs 39 mins (2005-03-28 13:42:50 GMT)
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You are right, splays are faults. (Probably, because the fault spreads the structure, but it is only my theory.) It is certain, that there is a letter missing, the word is splay.
Here is a website relating to it, at point 6. it says \"fault-splay\". I wonder, if you could find the french version of it...
www.unige.ch/sciences/terre/mineral/publications/onlinepub/...

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Note added at 4 hrs 55 mins (2005-03-28 13:59:06 GMT)
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See these as well: csmres.jmu.edu/geollab/vageol/vahist/struprimer.html
www.iodp-mi-sapporo.org/active_pdf/603B-Full2_cover.pdf
Selected response from:

juvera
Local time: 20:37
Grading comment
Thanks so much for all your help. You have got me out of a spot!
4 KudoZ points were awarded for this answer



SUMMARY OF ALL EXPLANATIONS PROVIDED
5footwall: the wall or rock on the underside of the deposit, spay: splay
juvera
4wedge of weakened rock >>>
Maria Chmelarova


Discussion entries: 1





  

Answers


2 hrs   confidence: Answerer confidence 5/5
footwall: the wall or rock on the underside of the deposit, spay: splay


Explanation:
The footwall is the geological structure supporting the ore/deposit.
They also call it the underlining wall or ledger wall. When they mine the ore, the top of it becomes the "floor" of the shaft.
Spay: I am convinced, they meant splay, which means, that the footwall is widening, splaying out.
Here is a mining glossary.
www.meridiangold.com/glossary.cfm

--------------------------------------------------
Note added at 4 hrs 39 mins (2005-03-28 13:42:50 GMT)
--------------------------------------------------

You are right, splays are faults. (Probably, because the fault spreads the structure, but it is only my theory.) It is certain, that there is a letter missing, the word is splay.
Here is a website relating to it, at point 6. it says \"fault-splay\". I wonder, if you could find the french version of it...
www.unige.ch/sciences/terre/mineral/publications/onlinepub/...

--------------------------------------------------
Note added at 4 hrs 55 mins (2005-03-28 13:59:06 GMT)
--------------------------------------------------

See these as well: csmres.jmu.edu/geollab/vageol/vahist/struprimer.html
www.iodp-mi-sapporo.org/active_pdf/603B-Full2_cover.pdf

juvera
Local time: 20:37
Works in field
Native speaker of: Native in HungarianHungarian
PRO pts in category: 8
Grading comment
Thanks so much for all your help. You have got me out of a spot!
Login to enter a peer comment (or grade)

5 hrs   confidence: Answerer confidence 4/5Answerer confidence 4/5
wedge of weakened rock >>>


Explanation:
From www.geol.canterbury.ac.nz/research:

"The combination of foolwaal splays and partitioning of strike - slip on the steep hanging wall side of the whole fault zone, creates a wedge of weakened rock dominated by inclined shear zones dippimg into the hillside."


footwall - the lower underlying wall of a vein, ore deposit, or coal seam in mine
the lower wall of an incident faul
splay - slope, to dislocate
also a block of rock involved in fault movement-oposite hanging wall

This has to do in geology with long term rock cycle, where the rocks were first deposited on side of the hill or... and later became a part of ore, coal deposits or... because the faulting.
Sorry for some typo and I cannot be helpfull more because E. as a second l., but hawing Geology education as a part of Geography.



    Reference: http://www.geol.canterbury.ac.nz/research
Maria Chmelarova
Local time: 16:37
Native speaker of: Slovak
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