Emergency legislation and labor reform in Spain(2011-2012) Spanish Labor Law is going through a phase of continuous and disordered reforms, most of them made through approved rules by the Government invoking raisons of urgency. Here are explained six recent andrelevant Royal Decrees-Laws approved between 2010 and 2012

Páginas 191-195.

La región de Puno cubre partes del Altiplano peruano y de la Cordillera Occidental, y presenta una estratigrafía original, así como una distribución de unidades estrechamente controlada por la estructura tectónica regional.

Integration of the zircon U-Pb ages available on the Toquepala Group, La Caldera batholith (s.l.), and porphyry Cu systems, in combination with geochemical data, unravels the evolution of the magmatic arc of southernmost Peru during the Late Cretaceous and Early Paleogene. Arc magmatic production increased starting ~90 Ma, and culminated between ~74 and ~62 Ma through a flare-up characterized by large plutonic and volcanic (especially ignimbritic) volumes. This long process resulted in the thickening of the arc crust, to a state of overthickening that triggered its extensional collapse, starting diachronously 61–59 Ma, during which giant porphyry Cu systems were emplaced between ~60 and ~53 Ma. Our empirical reconstruction of this protracted evolution provides simple guides for exploration of giant porphyry Cu deposits in southern Peru, as well as a magmatotectonic theoretical framewor...

Although Andean southern Peru forms the northwestern termination of the Bolivian Orocline, knowledge of its geology has little progressed in the last 20 years, partly due to the civil war that spread in the region during the 1980s and early 1990s. As a consequence, outdated information and concepts are generally still used in current assessments and syntheses, and updated data are needed. This short descriptive contribution presents the principal tectonic elements we currently recognize in southern Peru, and their relationships with syntectonic sedimentary basins. We observe that the most prominent deformational systems in this part of the Bolivian Orocline are dominantly transcurrent, and that many magmatic manifestations are associated with them.

Damos a conocer edades inéditas obtenidas por los métodos 40Ar-39Ar y K-Ar sobre rocas volcánicas y plutónicas del sur del Perú, y las comentamos brevemente.

[ENG] Three large transcurrent systems, with related magmatism, are identified in southern Peru. A ∼40-80km-wide, N150-trending, dextral corridor (CECLLA =Cusco-Lagunillas-Laraqueri-Abaroa structural corridor) is characterized by thick Oligocene basic lavas and numerous intrusions. The other two systems are oriented ∼N125-130 and sinistral, and cartographically related to the CECLLA. Miocene to Quaternary basic magmas are associated to the northeastern system (SFUACC = Urcos-Ayaviri-Copacabana-Coniri fault system). In the southwestern region, the abundant Late Cretaceous-Paleocene arc magmatism seems related to the Incapuquio-El Castillo fault system (SFIEC).

Emergency legislation and labor reform in Spain(2011-2012)Spanish Labor Law is going through a phase of continuous and disordered reforms, most of them made through approved rules by the Government invoking raisons of urgency. Here are explained six recent andrelevant Royal Decrees-Laws approved between 2010 and 2012

Emergency legislation and labor reform in Spain(2011-2012) Spanish Labor Law is going through a phase of continuous and disordered reforms, most of them made through approved rules by the Government invoking raisons of urgency. Here are explained six recent andrelevant Royal Decrees-Laws approved between 2010 and 2012

This study examines a dispute decided by the Civil Chamber of the Supreme Court, namely a claim for the protection of the right to honor brought by a particular radio journalist against another colleague. With this background, in a didactic way, we reflect on the type of contract between such professionals and the media. The ultimate aim is to encourage the interdisciplinary study of problems.

The widespread use of new technologies in the workplace is causing, for years, a series of disputes that are being settled primarily by the courts. This study reflects the responses given by jurisprudence, judicial and scientific doctrine to the conflicts about individual and collective using of computer tools, its control by the employer, as well as technological surveillance operated under his management and the possible infringement of workers’ fundamental rights.

Two rulings dated 1938 established the obligation of companies to make dinnersavailable to their workers, whether this would be in the form of a place arranged forsuch purpose, or by even serving food. Since then no other state norm has taken careof the matter, discussing whether the old norms are still current.On the other hand, when workers really benefit from the company’s dinner, of lowpricefood or of restaurant tickets; all sorts of doubts rise regarding their juridicalnature.The present study revises this old institution, examining the most recent sentencesand reporting the state of the matter.

4 páginas

[EN] Improving the chances of success of mineral exploration requires to interconnect metallogenetic analyses with the geological evolution of western Peru that can be reconstructed from current knowledge and ongoing investigations. This communication presents a preliminary stage in this research.

Petrographycal aspects of jurassic volcanic deposits of the Peruvian south coast are analyzed in the present work, which correspond to andesites and basalts corresponding to the Chocolate Formation and Chert stratified facies of the Guaneros Formation, the volcanic ones belong to a system of volcanic arc whereas deposits of the Guaneros Formation are signal of a cortical thinning for this period in the Peruvian South margin.

Petrographycal aspects of jurassic volcanic deposits of the Peruvian south coast are analyzed in the present work, which correspond to andesites and basalts corresponding to the Chocolate Formation and Chert stratified facies of the Guaneros Formation, the volcanic ones belong to a system of volcanic arc whereas deposits of the Guaneros Formation are signal of a cortical thinning for this period in the Peruvian South margin.

Los afloramientos del Jurásico- Cretácico inferior en el borde oriental de la cuenca de Arequipa conforman 4 sectores, que se agrupan en las áreas de Mañazo-Lagunillas y de Río Blanco-Loripongo-Yunga. En ambas zonas no aflora el contacto inferior con otras unidades más antiguas.

La Formación Ayabacas (~Turoniano) es una unidad resedimentada que se observa sobre un área superior a 50000 km2 en el Altiplano y la Cordillera Oriental del sur del Perú (Sempere et al., 2000). Su génesis fue explicada de maneras muy diferentes: fallamiento de bloques y erosión intensa (Heim, 1947), tectónica con pliegues y cabalgamientos (Newell, 1949; Chanove et al., 1969), deformación disarmónica y/o polifásica, fracturación causada por karstificación y/o diapirismo de yesos, intrusiones hipovolcánicas (Audebaud, 1971), caos producido por deslizamientos subaéreos (De Jong, 1974) o submarinos (Audebaud, 1967; Sempere et al., 2000). El estudio en curso soporta esta última interpretación, describiendo la Fm Ayabacas como una megabrecha (u olistostromo), es decir el resultado de deslizamientos submarinos de gran amplitud (Spence and Tucker, 1997). Aunque las interpretacion...

The Chocolate Formation is exposed in southern Peru between the cities of Nazca and Tacna, mostly in the Pacifie slopes of the Cordillera Occidental and along the coast. This lithostratigraphic unit was initially described near Arequipa by Jenk s (1948; "Volcànicos Chocolate"), who assigned a Jurassic age to it. It consists of a succession of volcanic rock s, sandstones, and con glomerates. Near the top of the unit, a Sinemurian ammonite was found in a fossiliferous limestone intercalation. In Tacna a similar unit was mapped as "Junera ta Formation" by Wilson & Gard a (1962) and later equated with the Chocolate Formation (Monge & Cerv antes, 2000). Recent studies have suggested that the base of this unit might be as old as Late Carboniferous (Pino et a l., 2004; Sempere et al., 2004). Because the Chocolate volcanism is likely to have been active in the middle Permian, it partly represen...

4 páginas