%0 Journal Article %T Sm-Nd and Rb-Sr constraints on the age and origin of magnetite mineralization in the Jerez De Los Caballeros Iron District of Extremadura, SW Spain %A D. P. F. Darbyshire %A F. Tornos %A C. Galindo %A C. Casquet %J Chinese Science Bulletin %@ 1861-9541 %D 1998 %I %R 10.1007/BF02891402 %U http://link.springer.com/article/10.1007/BF02891402