Obtaining of rock and sediment samples in the northern seas of Antarctic Peninsula: Contribution to the regional geologic evolution knowledge

In English:

The aim of the campaign was to obtain rock cores and vibrant-cores in the
continental platform and the slope of several sectors of the northern region of
Antarctic Peninsula. Cenozoic rocks were obtained which let us to complete and
to extend the cartography and sampling done in land to the immersed zone,
obtaining new sedimentologic data about Quaternary glacial-marine facies, this
data were compared to the high resolution seismic profiles taken in the RV
Hesperides in previous campaigns.

The Spanish groups, onboard the vessel HMS "James Clark Ross" operated by the
British Antarctic Survey, taking part in the project "High Latitude
Paleoenvironments" (HILATS), were focused on the fiords and continental
platform of King George Island, and a zone perpendicular to the pacific margin
of the Antarctic Peninsula, both in the Central Basin of Bransfield. The
results of the campaign were excellent, 74 rock cores and 25 vibrant-cores were
taken in the King George sector and 1 core and 12 vibrant-core in the Antarctic
Peninsula margin. It is important to emphasize not only the quantity but also
the quality of the cores obtained in a hard environment and with a complex
sedimentary facie penetration because of the abundance in rock fragments that
they content.

En Español:

El objetivo de la campaña era la obtencion de testigos de roca y vibro-testigos
en la plataforma continental y el talud de varios sectores de la region
septentrional de la Peninsula Antartica. Se consiguieron muestras de rocas del
Cenozoico, que permitieron complementar y extender a la zona sumergida las
cartografias y muestreos realizados en tierra, obteniendo testigos que
aportaron nuevos datos sedimentologicos sobre las facies glacio-marinas
cuaternarias, posibilitando la contrastacion de la interpretacion previa de
perfiles de sismica de alta resolucion obtenidos con el BIO Hesperides en
campañas anteriores.

Los intereses de los grupos españoles, en la campaña oceanografica JR29 a bordo
del de buque pabellon ingles HMS "James Clark Ross" operado por el Bristish
Antarctic Survey en el proyecto denominado por los ingleses "High Latitude
Paleoenvironments" (HILATS), se centraban en los fiordos y plataforma
continental de la Isla King George, y en un transecto perpendicular al margen
pacifico de la Peninsula Antartica, ambos dentro de la Cuenca Central de
Bransfield. Los resultados de la campaña fueron optimos, obteniendose 74
testigos de roca y 25 vibro-testigos en el sector de la Isla King George, y 1
testigo de roca y 12 vibrotestigos en el margen de la Peninsula Antartica. Cabe
destacar no solo la cantidad, sino sobretodo la calidad de los testigos
obtenidos en el ambiente dificil, y con unas facies sedimentarias complejas de
penetrar por la gran abundancia de fragmentos de roca que suelen contener.