RESUMENEl siguiente trabajo es una aproximación al desarrollo de las estrategias de pesca utilizadas por los grupos cazadores recolectores terrestres del norte de Tierra del Fuego, desde alrededor de los 5000 años AP hasta la llegada de los foráneos. La aproximación se hace a través de las evidencias arqueológicas -tecnología e ictioarqueología-y las fuentes etnográficas. Los resultados permiten constatar momentos de la importancia de la pesca en la subsistencia, además de variaciones en los modos de explotación, los cuales están evidenciados por los cambios tecnológicos y por la configuración de los conjuntos ictioarqueológicos desde el Holoceno medio hasta el periodo indígena-histórico. También se constata la presencia de campamentos especializados en esta actividad hacia los 2300 años AP y otros más tardíos donde su rol es similar al de los demás recursos marinos y terrestres. Por último, la presencia de corrales de pesca en la costa norte de Tierra del Fuego, permite discutir la permanencia y difusión de tradiciones tecnológicas a través del tiempo y espacio, en la extensa área de los archipiélagos septentrionales y meridionales.PALAbRAS CLAVES: estrategias de pesca, Tierra del Fuego, ictioarquología, tecnología de pesca, etnografía. FISHING AMONG TERRESTRIAL HUNTER GATHERERS OF TIERRA DEL FUEGO MAIN ISLAND, FROM PREHISTORY TO ETHNOGRAPHIC TIMES AbSTRACTThis paper examines the development of fishing strategies by terrestrial hunter-gatherers in northern Tierra del Fuego between 5000 bP and recent times. To do so, archaeological data (technology and fish bones) and ethnographic sources related to fishing practice are assessed. Analysis of this evidence reveals different moments in which the importance of fishing increases as well as some variability in the modes of exploitation. The study also detects the presence of specialized fishing camps dated to around 2300 bP and later times, their position coherent with other marine and terrestrial resources. The paper * Arqueóloga, Fundación CEQUA. Av.

The plate interface beneath the Mejillones Peninsula in Northern Chile is characterized by anomalous seismogenic behaviors, with seismic and aseismic slip, and low coupling values. We analyze this zone through the seismicity pattern and a 3-D tomography model. We identify high V P /V S values within the oceanic crust and in the lower continental crust, which we interpret as hydrated zones rich in fluids. These zones are correlated with the Mejillones fracture zone and with highly permeable lithologies of the lower continental crust, which allow a greater accumulation of fluids at the plate interface beneath the Mejillones Peninsula. Additionally, these areas exhibit a high rate of seismicity and concentrated swarms and repeaters. We propose that the presence of fluids controls the anomalous seismogenic behavior along the plate interface beneath the Mejillones Peninsula.Plain Language Summary The interplate zone beneath Mejillones Peninsula (MP), northern Chile, presents an anomalous seismogenic behavior with aseismic pulses, low coupling values, and acting as a seismic barrier for earthquakes occurred in adjacent areas. We believe that this anomalous behavior is due to the presence of fluids in the interplate zone under the MP. To corroborate this, we study the seismicity recorded by a local seismological network and constructed a tomographic velocity model. Our results show that within the oceanic crust and in the lower continental crust exist the presence of fluids that concentrates to the north and center of the MP, which correlate with the presence of the Mejillones fracture zone and with more fractured and permeable lithologies of the continental crust. This situation changes to the south of the MP where fluid concentration is lower. This is the first detailed attempt to characterize the role of fluids in the rheology of barriers within subduction zones and to distinguish geological controls on the fluid distribution. We believe that this type of study is fundamental for facilitating future prospective analysis of earthquake distributions and conducting hazard assessments.

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