Glossary entry (derived from question below)
English term or phrase:
footwall spays: footwall splays
English answer:
footwall: the gological structure supporting the ore/deposit, also: underlining or ledger wall. Splay
Added to glossary by
juvera
Mar 28, 2005 09:03
19 yrs ago
2 viewers *
English term
footwall spays
English
Tech/Engineering
Mining & Minerals / Gems
"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"
Responses
2 hrs
juvera
Works in field
Selected
footwall: the wall or rock on the underside of the deposit, spay: splay
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
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
4 KudoZ points awarded for this answer.
Comment: "Thanks so much for all your help. You have got me out of a spot! "
5 hrs
Maria Chmelarova
Native in: Slovak
Works in: English to Slovak, English to Czech, Slovak to English, and 2 more.
wedge of weakened rock >>>
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.
"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:
Discussion
On the following website http://www.websters-online-dictionary.org/definition/splay, I found that a splay in the mining sector is "One of a series of divergent small faults at the extremities of a majorfault. Splays are typically associated with rifts"
I found a lot of "footwall splay" on google, but I can't figure out if it is a fault or a widening.