Resumo

GOMEZ LONDONO, ERNESTO  e  CASTILLO LOPEZ, LUIS ANTONIO. MORPHO-STRUCTURAL ANALYSIS OF THE MANIZALES (ANTIOQUIA) MOUNTAIN AND ITS RELATIONSHIP WITH POSSIBLE GOLD MANIFESTATION IN THE ANTIOQUIAN BATHOLITH. Bol. cienc. tierra [online]. 2011, n.29, pp.21-29. ISSN 0120-3630.

Field observations about the geology of the Manizales Hill, during 2006 located in proximities of the Cristales Town (Antioquia) are presented. A hypothesis is postulated about the occurrence of possible auriferous manifestations, its narrow relationship with the presence of andesitic post-Antioqueño Batolith dikes, and with the Cristales Shear Zone, which in turn exerts a morpho-structural control of the hills in turn Manizales and Cristales, additionally changing the course of the Negra Stream. There are numerous mineralizations grouped around Cristales, the seams have predominantly NE direction, with numerous parallel and subparallel veins; the mineralization consists of pyrite, little chalcopyrite, galena casual, which is related to the presence of booms in some seams. The gangue is mainly quartz milky variety, with free gold; and although gold workings are abandoned in the Cerro Manizales, the operation was based, through veins thin, less than 20 cm, called veinless or needles. This suggests the existence of a high sulfidation gold deposit, controlled by the Cristales Shear Zone, manifested by the general tendency N-NE of the veins strike of the Manizales Hill, whose strike can be controlled by the stretching axes, where the veinlets are perpendicular to the axis of maximum extension (ó₁).

Palavras-chave : Mineralization; gold; deposits; Antioquian Batholith; structural geology; geology; vein; veinless; Antioquia; Colombia.

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