... J. P. (1984) , Pollen studies in the Junin area, central Peruvian Andes , Geol. Soc. Am. Bull. 12 , 1454 - 1465 . Heim A. (1949) . Observaciones geológicas en la región del terremoto de Ancash de...

...David A. Love; Alan H. Clark; J. Keith Glover Abstract Antamina, located at latitude 9° 32' S and longitude 77° 03' W in the Ancash Department of north-central Peru, is the largest known Cu-Zn skarn ore deposit. It incorporates a mineral reserve of 561 Mt, which has an average grade of 1.24 percent...

... , Ciencias e Investigaciones Buenos Aires , enero 1945 . 2 Datos Simológicos del Perú (1947) . 3 Heim Arnold Observaciones geológicas en la región del terremoto de Ancash de noviembre de 1946 , Vol...

... throughout the earthquake-affected region. Roekfalls reportedly accounted for most, or all, of the easuMties sustained on the east flank of the Cordillera Blanca (unpublished report, American Andean Relief Expedition to Ancash). Slides and falls of rock blocked road and railroad routes at many places...

...E. Jiménez; M. Cara; D. Rouland Abstract The method proposed a few years ago by Ekström et al. (1986) to retrieve the focal-mechanism parameters from a set of Love and Rayleigh waves recorded on a single station is extended to regional intermediate-size earthquakes. This method is based...

... Ass 1976 87 237 46 Bussell M. A. Pitcher W. S. Wilson P. A. Ring complexes of the Peruvian Coastal Batholith: a long standing sub-volcanic regime Can J Earth Sci 1976 13 1020 30 Child, R. 1976. The Coastal Batholith and its envelope in the Casma region of Ancash...

... shock yielding compressions at distances of 25° to 30° to the northeast. Most aftershocks occur at depths of 40 to 70 km; their first motions are sometimes reversed with respect to the main shocks. The seismic history of the region includes one comparable earthquake in 1725 but no events of similar...

... of Locating Hurricanes 311 :Bremner, P. C., and J. H. ttodgson--Direction of Faulting in the Ancash, Peru, Earthquake of November 10, 1946, from Teleseismic Evidence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 Burke-Gaffney, T. N., S.JA Search for the Phase P K J K P...

.... mineral districts. The opening article, entitled, “Ho for the San Juans!” (D. Smith, M. Vendl, K. Vendl), provides an important historical perspective. Owing to logistical challenges, mining only really began in the region in the late 1800s. Key to this development was the railroad industry, which...

... outcrop patterns related to the regional joint pattern. At depth, the intersections of major wrench fractures may have focussed the magmas and delimited the symmetrical disposition of the four centres. The centred complexes show a close relation between plutonism and vulcanism and prob­ably represent...

... Prieta Earthquake: A Preliminary Result on Pervasive Nonlinear Site Effects 1859 Aki, Keiiti, Kevin Mayeda, and Stuart Koyanagi--Site Amplification from S-Wave Coda in the Long Valley Caldera Region, California 2194 Albania, The Swarm of Nikaj-Merturi, by Betim Muco 1015 Alessandrini, Bruno, Salvatore...

... at distances less than 1,200 km. were found to fit a straight-line travel-time curve of slope 1/8.05 sec. per km., except that times from a group of nine stations in northern and central California and southern Nevada fell about 2 seconds below the line. These observations were interpreted in terms of regional...

..., Monterrosas, and Eliana (e.g.,  Chen et al., 2013 ; Fig. 1 ), and isolated IOCG deposits also occur in the Huarmey basin to the north in the departments of Lima ( Vidal, 1980 ) and Ancash ( Vidal and Leiva, 2021 ) The regional geology of the Marcona-Acarí area is shown in Figure 2 . The Marcona and Mina...

... PINOS, PERU SEISMOGRAPH STATION The following is extracted from a letter sent by Rev. Hilary Henrisey, O.S.B., of Huaraz, Ancash, Peru to Dr. Don Tocher of the NOAA Earthquake Mechanism Laboratory: Our station here at Los Pinos is just now getting to be a permanent installation. Within one week...

... of April 24, 1984 , Bennet J. H. Sherburne R. W. (Editors) , Calif. Div. Mines Geol. Spec. Publ. 68 , 161 - 173 . Heim A. (1949) . Observaciones geológicas en la región del terremoto dc Ancash de Noviembre de 1946 , Soc...

... Lett 1973 20 242 9 Child, R. 1976. The Coastal Batholith and its envelope in the Casma region of Ancash, Peru. Thesis Ph.D., Univ. Liverpool, (unpubl.). Clark A. H. Farrar E. Caelles J. C. Haynes S. J. Lortie R. B. McBride S. L. Quirt S. G. Robertson R. C...

... and/or the crustal structure of the region. The effect of the ground material on the intensities is not considered in this paper. They are to play a role within limited areas and to be of irregular nature. 24 9 1968 Copyright © 1969, by the Seismological Society of America References...

.... Knox G. J. Pitcher W. S. Geología de los cuadrángulos de Huayllapampa y Culebras Boln Serv. geol. min. Perú 1972 (in preparation) Petersen U. Regional geology and major ore deposits of central Peru Econ Geol 1965 60 407 76 Pitcher W. S. Newall Rast Ghost...

... of the Cretaceous formations of the West Peruvian trough is divided geographically into a western Coastal region and an eastern Andean region by the intrusive complex of the Coastal batholith. In the Andean region of central Peru, nine distinct formations of shale, sandstone, and limestone occur whose ages are well...

...M. A. Bussell Abstract The study of fault displacements in a region of well-dated sequential granitic intrusions suggests a close time relationship between two peaks of deformation and intrusive activity. Mantle-derived basic magmas were associated with both episodes, which are dated as mid...