Dear all,
another nice paper is
Müller, EPSL 206 (2003)
"Strenghtening the link between geochronology, textures and petrology"
Regards,
Luca
Quoting Di Toro Giulio <[log in to unmask]>:
> A nice paper is:
>
>
> Science 2000, vol 288, pp. 2195-2198
>
>
> Isotopic Dating of Strain Fringe Increments: Duration and Rates of
> Deformation in Shear Zones
>
> Wolfgang Müller, 1* Domingo Aerden, 2 Alex N. Halliday 1
>
> The time scales over which deformation in the Earth's crust remains
> localized in shear zones are poorly known, as are the associated strain
> rates. We have determined the longevity and rates of deformation using
> rubidium-strontium (Rb-Sr) microsampling dating of increments of fibrous
>
> strain fringes from a Pyrenean shear zone. The fibers grew
> quasi-continuously through a protracted deformation history between
> 87 and 50 million years ago, over a period comparable to that of an
> orogeny. During a short interval between 66 and 62 million years, a rise
>
> in strain rate from 1.1 × 10-15 to 7.7 × 10-15 seconds-1 occurred. This
> acceleration correlates with an abrupt change in fiber-growth direction
> and a stress-field inversion from gravitational collapse to renewed
> horizontal crustal shortening.
>
>
> Giulio
>
>
>
> JISCmail list wrote:
>
> > Dear Colleagues:
> >
> > I am interested in general references on the recent advances in
> > radiometric dating of various minerals in shear zone fabrics. Does
> > anyone know of any such references? I would greatly appreciate any
> > ideas that you might have.
> >
> > Best regards,
> >
> > Eldridge
> > --
> > Distinguished Professor of Emeritus of Geology
> > Vice President, International Union of Geological Sciences
> > Department of Geology, University of California
> > One Shields Avenue
> > Davis, CA 95616
> >
> > Tel: 530-752-0352
> > Fax: 530-752-0951
> >
> > "Civilization exists by geologic consent, subject to change without
> > notice"
> > "Civilization is an interval between ice ages"
> > (Will Durant)
>
>
>
> *****************************************************
> Giulio Di Toro
> c/o Universita' di Padova
> Dipartimento di Geologia, Paleontologia e Geofisica
> Via Giotto 1
> 35137 Padova, Italy
> tel ++39 049 8273941
> fax ++39 049 8272070
> e-mail: [log in to unmask]
> *****************************************************
>
>
=======================================================
Luca Menegon
Dipartimento di Geologia, Paleontologia e Geofisica
Università di Padova
Via Giotto 1 - 35137 Padova
Italy
Mobile: +39-348-7350492
e-mail: [log in to unmask]
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