Hi all,
Based on widespread stratigraphic and metamorphic inversions in the central
Menderes Massif in Turkey, I once suggested that the Menderes Massif forms a
recumbent fold nappe with a hinge length of about 110 km. It generated a
discussion and one of the objections was the apparent absence of such large
fold nappes, even the existence of the Tay Nappe, which was given as an
example, was querried (see the references below). With very large
structures it is difficult to prove their continuity, especially if there
are affected by subsequent deformations.
Aral
Gessner, K., Ring, U., Passchier, C.W., Hetzel, R., 2002, Discussion on
"Stratigraphic and metamorphic inversions in the central Menderes Massif: a
new structural model", by Aral I. Okay. Int J Earth Sci (Geol Rundsch)
(2002) 91:168-172.
Okay, A.I., 2001, Stratigraphic and metamorphic inversions in the central
Menderes Massif: a new structural model. International Journal of Earth
Sciences (Geologische Rundschau), 89, 709-727.
Okay, A.I., 2002, Reply: Stratigraphic and metamorphic inversions in the
central Menderes Massif: a new structural model. International Journal of
Earth Sciences (Geologische Rundschau), 91, 173-178.
Aral I. Okay
Eurasia Institute of Earth Sciences and
Department of Geology
Istanbul Technical University
[log in to unmask]
http://atlas.cc.itu.edu.tr/~okay/index.html
tel 0090 212 285 6208
fax 0090 212 285 6210
----- Original Message -----
From: "Krabbendam, Maarten" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, March 02, 2009 6:46 PM
Subject: The largest fold nappe?
> Thanks for all the anwers thus far. I'm writing something up on the tay
> Nappe in the grampian Orogeny in Scotland. Its strike length is at least
> 200 km (Stonehaven to Butte) and possibly longer into Northern ireland.
>
> What I want to know if the following sentence would be remotely
> appropriate:
>
> "The Tay Nappe, in terms of strike length, is 1) by far the largest / 2)
> the largest / 3) amongst the largest fold nappes in the world"
>
> So far, 2) or 3) appear to be correct...
>
> Maarten
>
>
> -----Original Message-----
> From: Tectonics & structural geology discussion list
> [mailto:[log in to unmask]] On Behalf Of Yvette Kuiper
> Sent: 02 March 2009 13:54
> To: [log in to unmask]
> Subject: Re: The largest fold nappe?
>
> Dear Maarten,
>
> I don't know if these are the biggest (maybe the ones in Norway are
> bigger?), but in the Foxe Fold Belt of Melville Peninsula there seem to
> be fold nappes >70-80 km. See the references below. They are refolded by
> another generation of folds that becomes tight towards the WSW, so it's
> hard to tell how far the nappes continue. Towards the ENE there is a lot
> of water before the Foxe Fold Belt continues on Baffin Island.
>
> Just out of curiosity, why are you asking that question?
>
> Cheers, Yvette
>
> Henderson, J.R., 1981. Structural analysis of sheath folds with
> horizontal X-axes, northeast Canada. Journal of Structural Geology 3,
> 203-210.
>
> Henderson, J.R., 1983. Structure and metamorphism of the Aphebian
> Penrhyn Group and its Archean basement complex in the Lyon Inlet area,
> Melville Peninsula, District of Franklin. Geological Survey of Canada,
> Bulletin 324, 50 pp.
>
>
>
> Krabbendam, Maarten wrote:
>> Dear all,
>>
>>
>> I am curious what the largest fold nappes in the world are.
>> The dimension I'm especially interested in is the strike length.
>>
>> Which is the 'longest' fold nappe?
>>
>> Cheers,
>>
>>
>> Maarten Krabbendam
>> British Geological Survey
>> Murchison House
>> West Mains Road
>> Edinburgh EH9 3LA
>> Tel: 0131 6500256
>> Email: [log in to unmask]
>>
>>
>>
>>
>>
>>
>
>
> --
> Yvette D. Kuiper
> Assistant Professor
> Department of Geology and Geophysics
> Boston College
> Devlin Hall 213
> 140 Commonwealth Avenue
> Chestnut Hill, MA
> 02467 USA
>
> Tel. 617-552-3647
> Fax. 617-552-2462
> http://www2.bc.edu/~kuipery/
>
> --
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