The Otú Norte or Otú-Pericos Fault ( es, Falla de Otú Norte) is an inactive sinistral oblique
strike-slip fault
In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic ...
in the
department
Department may refer to:
* Departmentalization, division of a larger organization into parts with specific responsibility
Government and military
*Department (administrative division), a geographical and administrative division within a country, ...
of
Antioquia Antioquia is the Spanish form of Antioch.
Antioquia may also refer to:
* Antioquia Department, Colombia
* Antioquia State, Colombia (defunct)
* Antioquia District, Peru
* Antioquia Railway
The Antioquia Railway ( es, Ferrocarril de Antioquia) i ...
in northern
Colombia
Colombia (, ; ), officially the Republic of Colombia, is a country in South America with insular regions in North America—near Nicaragua's Caribbean coast—as well as in the Pacific Ocean. The Colombian mainland is bordered by the Car ...
. The fault has a total length of and runs along an average north-northwest to south-southeast strike of 346.4 ± 8, cross-cutting the northern part of the
Central Ranges
Central Ranges (code CER) is an Australian bioregion, with an area of 101,640.44 square kilometres (39,244 sq mi) spreading across two states and one territory: South Australia, Western Australia, and the Northern Territory.Andes. Together with the parallel
Bagre Norte Fault
The Bagre Norte Fault ( es, Falla de Bagre Norte) is a sinistral oblique strike-slip fault in the departments of Antioquia and Bolívar in northern Colombia. The fault has a total length of and runs along an average north to south strike of 35 ...
the fault separates the Central Ranges from its northeasternmost continuation, the Serranía de San Lucas.
Etymology
The fault was by Feininger et al. in 1972 named after
Otú Airport
Otú Airport ( es, Aeropuerto de Otú) is an airport located in the village of Otú and serving the town of Remedios, a municipality of the Antioquia Department in Colombia. It is also known as Alberto Jaramillo Sanchez Airport.
Currently only ...
Antioquia Antioquia is the Spanish form of Antioch.
Antioquia may also refer to:
* Antioquia Department, Colombia
* Antioquia State, Colombia (defunct)
* Antioquia District, Peru
* Antioquia Railway
The Antioquia Railway ( es, Ferrocarril de Antioquia) i ...
.Consorcio GSG, 2015, p.168
Description
The Otú Norte Fault crosses the northern part of the
Central Ranges
Central Ranges (code CER) is an Australian bioregion, with an area of 101,640.44 square kilometres (39,244 sq mi) spreading across two states and one territory: South Australia, Western Australia, and the Northern Territory.Andes. The fault strikes north-northwest to south-southeast and appears to branch off the Palestina Fault. The Otú Fault extends in a northwest direction to near Nechí, where it is covered by young
Quaternary
The Quaternary ( ) is the current and most recent of the three periods of the Cenozoic Era in the geologic time scale of the International Commission on Stratigraphy (ICS). It follows the Neogene Period and spans from 2.58 million years ...
Precambrian
The Precambrian (or Pre-Cambrian, sometimes abbreviated pꞒ, or Cryptozoic) is the earliest part of Earth's history, set before the current Phanerozoic Eon. The Precambrian is so named because it preceded the Cambrian, the first period of the ...
Cajamarca Complex
Cajamarca (), also known by the Quechua name, ''Kashamarka'', is the capital and largest city of the Cajamarca Region as well as an important cultural and commercial center in the northern Andes. It is located in the northern highlands of Peru ...
on the west.Fonseca et al., 2011, p.40Fonseca et al., 2011, p.64 Just west of Remedios, the fault forms the contact between the Cretaceous
Antioquia Antioquia is the Spanish form of Antioch.
Antioquia may also refer to:
* Antioquia Department, Colombia
* Antioquia State, Colombia (defunct)
* Antioquia District, Peru
* Antioquia Railway
The Antioquia Railway ( es, Ferrocarril de Antioquia) i ...
and Jurassic Segovia Batholiths.Geological Map of Antioquia, 1999 The northern end apparently splays into several faults that cross the Nechí River.Paris et al., 2000, p.28
Activity
A rate of less than per year is estimated for the fault, considered inactive. Displaced Quaternary terraces as high as are reported and the fault offsets the Tertiary erosion surface of the Central Ranges.Paris et al., 2000, p.29 A total displacement of the fault has been estimated at .Álvarez et al., 2007, p.49
Gramalote
Gramalote is a Colombian municipality and town located in the department
Department may refer to:
* Departmentalization, division of a larger organization into parts with specific responsibility
Government and military
*Department (administra ...
and
Cisneros
Grupo Cisneros is a privately held, family owned business headquartered in Coral Gables, Florida, historically based in Venezuela, with a focus on Latin American and Spanish-speaking people worldwide. It is a conglomerate of media entertainment, ...
amphibolite
Amphibolite () is a metamorphic rock that contains amphibole, especially hornblende and actinolite, as well as plagioclase feldspar, but with little or no quartz. It is typically dark-colored and dense, with a weakly foliated or schistose (flaky ...
facies of the Segovia Batholith.Álvarez et al., 2007, p.47 This ductile behavior was later overprinted by fragile tectonics, leaving
cataclasis A cataclastic rock is a type of fault rock that has been wholly or partly formed by the progressive fracturing and comminution of existing rocks, a process known as ''cataclasis''. Cataclasis involves the granulation, crushing, or milling of the ori ...
and fault breccias in the fault zone as well as striations in the quartz of the
batholith
A batholith () is a large mass of intrusive igneous rock (also called plutonic rock), larger than in area, that forms from cooled magma deep in Earth's crust. Batholiths are almost always made mostly of felsic or intermediate rock types, such ...
. These deformations are interpreted as second grade Riedel shears.Álvarez et al., 2007, p.48
Romeral Fault System
The Romeral Fault System ( es, Sistema de Fallas (de) Romeral) is a megaregional system of major parallel and anastomosing faults in the Cordillera Central (Colombia), Central Ranges of the Colombian Andes and the Cauca Basin, Cauca, Amagá Basin, ...
*
Bagre Norte Fault
The Bagre Norte Fault ( es, Falla de Bagre Norte) is a sinistral oblique strike-slip fault in the departments of Antioquia and Bolívar in northern Colombia. The fault has a total length of and runs along an average north to south strike of 35 ...