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- W2510972011 abstract "The Huallanca Cordillera with a lenght of about 20 km, is situated in the Northwestern part of Peru and belongs to the Western Cordillera of the Andes. It was visited in June 1968 by the Expedicao Braslleira 1968 aos Andes Peruanos, whose aim was to climb for the first time the peaks of Nevado Huallanca (5.480 m), Nevado Huallanca Sur (5.400 m), Tunacancha (5.320 m) and Mina Pata (5.260 m), and make the orographic and geologic reconaissance of the region. Rocks are mostly deposited, in the Cordillera Huallanca, during the Cretaceous period that, in Peru, is represented by outcrops that occupy more than 75% of the total area of the mesozotc rock expositions. In the small visited area the Lower Cretaceous (Pos-Portlandian to Pre-Valanginian) is represented by the Chimu Formation sandstone and the Upper Cretaceous (Upper Albian to Upper Turonian interval) is represented by the massive dark limestones of the Jumasha Formation. Outcrops of the older Chicama beds (Upper Jurassic) are known to the East, at the small village of Huallanca (Bodenlos and Erickson) and to the West, at the Caullaraju Mountains, in the southern part of the Cordillera Blanca (Rocha Campos and Cordani). It is thus probable that these jurassic rocks occur beneath the Cordillera Huallanca, as well as under the Huayhuash more to the south (P. Coney), and are disconformably overlain by the Chimu sandstone. The Santa, Carhuaz, Pariahuanca, Chulec and Pariatambo Formations, mapped by Peter Coney (3) in the southern part of the Cordillera Huallanca, were not recognized in its northern portion. In restricted places, covering the mesozoic formations, Breccioid rocks are found related to small terciary hipabyssal intrusions, which are more numerous at the vicinity of the ridges formed by intensely folded limestones. Small filling and replacement mineralizations on the limestones are associated to these intrusions, and allow for a rudimentary copper. silver, antimony, lead and zinc exploration." @default.
- W2510972011 created "2016-09-16" @default.
- W2510972011 creator A5004404529 @default.
- W2510972011 date "2017-06-20" @default.
- W2510972011 modified "2023-10-03" @default.
- W2510972011 title "Reconhecimento geológico da parte setentrional da Cordillera Huallanca, Peru" @default.
- W2510972011 doi "https://doi.org/10.11606/d.44.2016.tde-29082016-152600" @default.
- W2510972011 hasPublicationYear "2017" @default.
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