29 May - 6 June,
Last update 1 December 2008:
Bons & Jens Rößiger
and Geodynamics, Inst. for Geosciences, Tübingen University
Please check literature to read before the
Please remember to register as a driver
Departure: 07:30 from Europcar, Tübingen
Cap de Creus is
point of the Pyrenees, just south of the Spain-France border. It is
of the central "Axial Zone" of the Pyrnees (a), which contains
- Paleozoic rocks, which were deformed and metamorphosed during the
Variscan Orogeny. The main field area (retancle c in fig. b) is located
5 km away from the town Cadaqués. Precambrian-Ordovician
are found there, with a high metamorphic grade (amphibolite facies, up
to anatexis). Variscan magmatic rocks that occur are two large granite
bodies outside of the mapping area and many small pegmatite bodies in
mapping area. The area is a Natural Park, because of its natural
geological heritage and precious flora and fauna.
The rocks were
times during amphibolite facies metamorphism. Later, shear zones formed
during retrograde greenschist facies conditions. The aim of the field
is to map and unravel the complicated tectonic - metamorphic - magmatic
history of the area. This can be done with the many structures that are
exposed, such as cleavages, folds, quartz veins, boudins, pegmatites,
etc. Outcrops are excellent!
The beautiful Cap
peninsula attracts many tourists, especially the Pentacost-weekend. We
will therefore also do some exercises away from Cap de Creus:
Biure-antiform near Biure,
about 30 km NW of Roses. Here we can "warm up" with a large-scale
that formed during the Alpine Orogeny in Mesozoic rocks.
- Shear zones
near Roses. Here we will see the Roses Granodiorite, which is cut by
- An excursion
along the coast East of Rosas, to see spectacular mega quartz veins,
and low metamorphic grade rocks that were folded several times. The day
ends at a nice beach with bar.
The results of
exercises will be presented in short reports
and maps, which will be made during the field
On Friday May
25th, we will
drive from Tübingen to Garriguella, just across the Spanish
It is a long drive, so be in time on Friday morning! We
at the camp ground of Garriguella.
Departure Friday, 29 May, at 7:30 AM. BE THERE IN TIME
- 29 May,
from Europcar (near railway), Tübingen, travel to
- 06 June -
to Tübingen, arriving (late) in the evening
(if not, bad luck,
take the train or whatever to get there)
Paul Bons: +49 - (0)160 - 5515482 (SMS preferred)
Empordà (Friday-Monday): 6-person bungalows, with showers and
Vilajuiga s/m, 17780 Garriguella,
- Tel: +34 -
- Fax: +34 -
- Carpe Diem Club Cadaqués
(Monday-Saturday) 6/7-person bungalows, with showers and
- Tel: +34 -
- Fax: +34 -
What to bring
compass (if you have - will also be provided)<>
(better than ball point)
to hold map
A4 drawing paper
tracing paper for stereonets
and personal items:
(please keep to a minimum
field boots (the rocks
trousers (thorny scrub)
jacket (it can be
hat for sunny days
(but of course you have
no time for swimming...)
first-aid kit to take into the field
medical insurance card
We stay in bungalows
all the time. The bungalows have beds and blankets (but no sheets or
towel). They are also fully equiped with kitchen, plates, cups, pots,
sheets needed, no blankets
toiletries (soap, etc.)
pirctures from the 1st TectTask field workshop to the same are can be
quarz veins in
metapelites show the complex multiple deformation in the area
in metapelite indicate the high metamorphic grade
|Many pale pegmatites
cut through the rocks
zones cut through the Roses Granodiorite. Aplite dykes are offset by
sinistral shear zone shown here.
known as the home town of Salvador Dalí, who ensured that
remained mostly untouched by big hotel developements
(with links to download pdf-files)
- Bons, P.D.,
J. Passchier, C.W. (2004) Apparent
boudinage in dykes. Journal of Structural Geology 26, 625-636.
- Carreras, J. 2001.
on Northern cap de Creus shear zones. Journal of Structural Geology
- Carreras, J.,
Druguet, E., Griera, A. (2005) Shear
zone-related folds. Journal
of Structural Geology 27, 1229-1251.
- Carreras, J.,
Druguet, E., Griera, A., Soldevila, J. (2004) Strain and deformation history in a
syntectonic pluton. The case of the Roses granodiorite (Cap de Creus,
Eastern Pyrenees). Geol. Soc. London Speci. Publ. 224, 307-319.
- Druguet, E.,
Victor, P., den Brok, S. 1997. Analysis
of a complex high-strain zone at cap de Creus, Spain.
- Druguet, E. 2001. Development
of high thermal gradients by coeval transpression and magmatism during
the Variscan orogeny: insights from the Cap de Creus (Eastern Pyrenees).
Tectonophysics 332, 275-293.
- Druguet, E., Hutton,
D.H.W. (1998) Syntectonic anatexis and
magmatism in a mid-crustal transpression shear zone: an example from
the Hercynian rocks of the eastern Pyrenees. Journal of Structural Geology 20,
- Gomez-Rivas, E.,
Bons, P.D., Griera, A., Carreras, J., Druguet, E., Evans, L. (in
review) Strain and vorticity
analysis using small-scale faults and associated drag folds.
Journal of Structural Geology.