Dear John, dear Graham
are these really shear zones? The classical and modern textbooks
define shear zones as ductile fault zones. The anchimetamorphic zones
are probable brittle faults? I know, it is only a semantic problem.
However, younger scientists get be confused.
best wishes
uwe
>Dear John
>Have a look at what Bernard and I did with the Orlock Bridge Fault...it's all
>anchizone........sorry I don't have a pdf
>
>Anderson, T B. & Oliver, G J H (1986). The Orlock Bridge Fault: a major Late
>Caledonian sinistral fault in the Southern Uplands Terrane, British Isles.
>Trans. R. Soc. Edin: Earth Sci. 77, 203-222.
>
>Cheers
>Grahame (Still at the National University of Singapore and loving it)
>
>Quoting "John F. Dewey" <[log in to unmask]>:
>
>> Dear Colleagues,
>>
>> For some years, I have been working on the anchi-metamorphic shear
>> zones of the North Cornwall/Devon coast between Crackington Haven and
>> Hartland Quay. Rob Strachan got me going by, generously, giving me a
>> sliced pebble through one of the finest shear zones of my experience
>> from the beach at Hartland Quay. I have, now, analysed many large
>> thin sections across these shear zones, which combine sigmoidal
>> tension gashes with solution cleavages. Most are transtensional plane
>> strain zones of volume increase. I would be most grateful to hear
>> from anyone who has studied such shear zones.
>>
>> Best wishes,
>> John Dewey
>> --
>>
>> -----------------------------------
>> Please update your address book to use [log in to unmask] as my
>> e-mail address.
>>
>> Prof. John F. Dewey FRS, Hon. M.R.I.A., Mem. Acad. Eur., For. Mem.
>> US Nat. Acad. Sci, Distinguished Emeritus Professor University of
>>California,
>> Emeritus Professor University College Oxford.
>>
>> Sherwood Lodge,
>> 93 Bagley Wood Road,
>> Kennington,
>> Oxford OX1 5NA,
>> England, UK
>>
>> University College,
>> High Street,
>> Oxford OX1 4BH
>>
>> Telephone Nos:
>> 011 44 (0)1865 735525 (home Oxford)
>> 011 44 (0)1865 276792 (University College Oxford)
>> email: [log in to unmask]
>>
>
>
>
>
>------------------------------------------------------------------
>University of St Andrews Webmail: https://webmail.st-andrews.ac.uk
--
Uwe Altenberger
Institute of Earth and Environmental Sciences
University of Potsdam
Karl-Liebknecht-Str. 24
D-14476 Potsdam-Golm
Tel. +49 331 977 5806
Fax +49 331 977 5700
[log in to unmask]
|