Jim,
There must be some misunderstanding. The rock I am talking about WAS an
amphibolite which has undergone contact metamorphism due to a granodiorite
intrusion. Contact metamorphism of this amphibolite resulted in the
formation of the present cpx-opx-plag 'hornfelses, in which relics of the
original amphibolite occur in form of patches.
I hope this clarifies what I meant in my previous e-mail.
cheers
Anthi
At 15:41 01.11.01 -0500, you wrote:
>Anthi:
>
> FWIW, with cpx+opx your assemblage is granulite or
pyroxene-hornfels facies, not 'amphibolite'. I agree totally that the
rocks still may be 'amphibolite', and I share that use of the terminology
for the rock. Just thought this distinction might deserve mention.
Everyone stay safe.
>
>At 04:05 AM 10/30/2001, Liati, Anthi wrote:
>>Dear Ronan,
>>
>>Regarding your request, there is one case of contact metamorphic
>>amphibolites in the Rhodope zone, Northern Greece, which I have seen and
>>described myself, in the framework of my PhD thesis. These rocks are
>>partly
>>to completely transformed into cpx-opx plag 'hornfelses'. In the field
>>one
>>can observe still relics of the original amphibolite in form of a few
>>cm-large 'patches' in a greenish (cpx dominated) rock. These
>>amphibolites
>>occur together with many other regional metamorphic rocks (e.g marbles,
>>ultramafics, metapelites), which were also affected by contact
>>metamorphism
>>caused by a granodiorite intrusion. There is some description, mineral
>>chemistry, met. conditions etc. in my thesis, which you may find through
>>Laurent Jolivet / Bruno Goffe (ENS, Paris). Bruno Goffe should have it.
>>I
>>hope that helps.
>>
>>cheers
>>Anthi Liati
>>
>>
>>At 18:46 08.10.01 +0200, you wrote:
>>>Dear All,
>>>
>>>Does anyone know a case of contact metamorphism overprinting a regional
>>>metamorphism within metabasites?
>>>
>>>If you know such example of geological context, could you please
>>provide me
>>>with references and outcropping conditions?
>>>
>>>Many thanks in advance.
>>>
>>>Ronan
>>>
>>>
>>>
>>>"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
>>>Ronan HEBERT
>>>Departement des Sciences de la Terre et de l'Environnement
>>>Universite de Cergy-Pontoise
>>>8, Le Campus, Batiment I
>>>95031 Cergy cedex - France
>>>Phone : (33) 01 34 25 49 41 - Fax : (33) 01 34 25 49 04
>>>Email : [log in to unmask]
>>>"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
>>> http://www.u-cergy.fr/rech/labo/equipes/tecto/index.html
>>>
>>
>>-----------------------------------------------------------------------
>>Dr Anthi Liati
>>Institute of Isotope Geology and Mineral Resources
>>Department of Earth Sciences
>>ETH-Zentrum
>>Sonneggstr. 5, 8092 Zürich
>>Tel. ++41 1 632 6607
>> ++41 1 632 3764 (secretary Mrs. Britt Meyer)
>>Fax ++ 41 1 632 1827
>
>
>Best Regards,
>
>JIM ECKERT
><[log in to unmask]>
>------------------------------------------------------------
>James O. Eckert, Jr., Ph.D
>Department of Geology and Geophysics, Yale University
>------------------------------------------------------------
>
-----------------------------------------------------------------------
Dr Anthi Liati
Institute of Isotope Geology and Mineral Resources
Department of Earth Sciences
ETH-Zentrum
Sonneggstr. 5, 8092 Zürich
Tel. ++41 1 632 6607
++41 1 632 3764 (secretary Mrs. Britt Meyer)
Fax ++ 41 1 632 1827
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