RT Journal Article
T1 Secuencia de emplazamiento, alteración hidrotermal y metamorfismo en el Complejo Intrusivo de Jörn, distrito minero de Skellefte, norte de Suecia
T1 Emplacement, hydrothermal alteration and metamorphism sequence in the Jörn Granitoid Complex, Skelleftemining district, northern Sweden
A1 González Roldán, Manuel Jesús
A1 Allen, Rodney L.
A1 Donaire Romero, Teodosio
A1 Pascual Martínez, Emilio
AB The Skellefte district is one of the most important mining districts in Sweden, located in an early Proterozoic(1.90-1.87Ga) volcanic arc province in the Baltic Shield, northern Sweden. The district consists of a complexvolcanosedimentary succession formed by submarine, mainly felsic, volcanic rocks named Skellefte Group,overlain by a subaerial, felsic volcanic succession named Arvidsjaur Group and shallow- to deep-marinesedimentary rocks known as Vargfors Group (Allen et al., 1996). The Jörn Granitoid Complex (JGC) crops outat the northern boundary of the Skellefte district, and is constituted by several intrusions ranging in compositionfrom gabbro to granite. Some features of the JGC suggest that it is comagmatic with the volcanic rocks of theSkellefte and Arvidsjaur Group. Our recent study has revealed that earlier intrusives in the complex (GI) havesignificant geochemical differences with the rest of plutonic rocks in the complex (GII to GIV). Crystallizationof GI was followed by intense hydrothermal alteration and late, regional contact metamorphism that do notaffect the later GII to GIV facies. This sequence in time, together with the chemical contrasts between thesuccessive Jörn facies, suggests that a significant time gap lasted between the emplacement of GI and thelater plutonic rocks in the Jörn complex. This is probably relevant to the geological history and ore researchin the district, in that a major change occurred between GI and the rest of the JGC facies, involving changesin the geochemical character of magmatism and coeval thermal activity
PB Sociedad Geológica de España
YR 2006
FD 2006
LK http://hdl.handle.net/10272/8631
UL http://hdl.handle.net/10272/8631
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026