Bucaramanga-Santa Marta Fault

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Bucaramanga-Santa Marta Fault
Bucaramanga-Santa Marta Fault System
(Sistema de) Falla(s) de Bucaramanga-Santa Marta
Bucaramanga, Colombia from space.JPG
View of the Bucaramanga Fault along Bucaramanga
Colombia relief location map.jpg
Red pog.svg
Location of the fault in Colombia
Santander Topographic 2.png
Red pog.svg
Bucaramanga-Santa Marta Fault (Santander Department)
Topographic Map of the Cesar-Rancheria Basin - Colombia.jpg
Topographic map of northern Colombia showing the fault
Etymology Bucaramanga, Santa Marta
Coordinates 7°05′25″N73°05′15″W / 7.09028°N 73.08750°W / 7.09028; -73.08750
Country Colombia
Region Caribbean, Andean
State Magdalena, Cesar, Norte de Santander, Santander
Cities Santa Marta, El Paso, Bucaramanga, Floridablanca, Piedecuesta
Characteristics
Elevation1–1,500 m (3.3–4,921.3 ft)
Range Sierra Nevada de Santa Marta
Eastern Ranges
  Andes
Part ofAndean faults
SegmentsSanta Marta, Algarrobo, Bucaramanga Faults
Length674 km (419 mi)
Strike 341 ± 23 (NNW-SSE)
Displacement 110 km (68 mi)
Tectonics
Plate South American Plate
Status Active
Earthquakes Pre-Columbian era (~1020 AD)
Type Strike-slip fault
Movement Sinistral
Rock units Caribbean, La Guajira, Tahamí & Chibcha Terranes
Age Neogene-Holocene
Orogeny Andean

The Bucaramanga-Santa Marta Fault (BSMF, BSF) or Bucaramanga-Santa Marta Fault System (Spanish : (Sistema de) Falla(s) de Bucaramanga-Santa Marta) is a major oblique transpressional sinistral strike-slip fault (wrench fault) in the departments of Magdalena, Cesar, Norte de Santander and Santander in northern Colombia. The fault system is composed of two main outcropping segments, named Santa Marta and Bucaramanga Faults, and an intermediate Algarrobo Fault segment in the subsurface. The system has a total length of 674 kilometres (419 mi) and runs along an average north-northwest to south-southeast strike of 341 ± 23 from the Caribbean coast west of Santa Marta to the northern area of the Eastern Ranges of the Colombian Andes.

Contents

The fault system is a major bounding fault for various sedimentary basins and igneous and metamorphic complexes. The northern Santa Marta Fault segment separates the Sinú-San Jacinto Basin and Lower Magdalena Valley in the west from the Sierra Nevada de Santa Marta to the east. The buried Algarrobo Fault segment forms the boundary between the Lower Magdalena Valley and northern Middle Magdalena Valley to the west and the Cesar-Ranchería Basin in the east. The Bucaramanga Fault segment separates the middle part of the Middle Magdalena Valley in the west from the Santander Massif in the east.

The fault system bounds and cuts the four largest terranes of the North Andes Plate; the La Guajira, Caribbean and Tahamí Terranes along the Santa Marta section and intraterrane movement in the Andean Chibcha Terrane. Studies of the fault segments have shown the fault was active in the pre-Columbian era, around the year 1020, when the area around Bucaramanga was inhabited by the Guane. Various seismic events analysed to have occurred during the Holocene of the Bucaramanga Fault segment lead to the conclusion the fault is active.

Description

The Bucaramanga-Santa Marta Fault is a major fault system which extends for a total distance of 674 kilometres (419 mi) from the Colombian Caribbean coast to the Eastern Ranges of the Colombian Andes to as far as about 6.5° N, south of the capital of Santander, Bucaramanga. The fault system, with an average strike of 341 ± 23 degrees, is a major wrench fault with a sinistral (left-lateral) displacement ranging from 45 to 110 kilometres (28 to 68 mi) and a fault slip rate of 0.01 to 0.2 millimetres (0.00039 to 0.00787 in) per year. [1] The Santa Marta Fault forms the boundary between several distinct geological provinces: it is the western limit of the Santa Marta Massif with the Sinú-San Jacinto Basin, farther to the south the fault separates the Lower Magdalena Valley and northern Middle Magdalena Valley from the Cesar-Ranchería Basin. The Santander Massif is separated from the central part of the Middle Magdalena Valley along the southern Bucaramanga Fault segment of the fault system. [2]

The fault divides the northern part of the Eastern Ranges in two structurally distinct regions. The Andean uplifted eastern block mainly comprises crystalline igneous and metamorphic rocks of Paleozoic and pre-Cambrian age, with lesser amounts of Jurassic, Triassic and Tertiary sedimentary rocks. In the western downthrown block, predominately sedimentary rocks of Quaternary and Tertiary age are found, with lesser amounts of Cretaceous and Jurassic rocks. The northern half of the fault is partially covered by Quaternary deposits in the Cesar and Magdalena valleys. [2]

Segments

The fault is divided into three segments; the main Bucaramanga Fault segment in the south, the Algarrobo Fault in the central section, [3] and the main Santa Marta Fault segment in the northern part of the fault system. [4] [5] [6] Between the two main outcropping segments, the Algarrobo Fault is present in the subsurface, overlain by Quaternary sediments. [7] [8] [9] [10] [11] The urban centre of the major coal producing municipality El Paso, Cesar is located right above the fault. [9] The fault reappears at surface east of Tamalameque, Cesar, where it continues south-southeastward into the Eastern Ranges in the departments of Norte de Santander and Santander. [12] [13] [14] [15] [16] [17] The fault can be traced until San Andrés, Santander. [18] The Bucaramanga Fault possibly continues as the compressional Boyacá and Soapaga Faults on the Altiplano Cundiboyacense. [19]

Municipalities

Topography of Magdalena Magdalena Topographic 2.png
Topography of Magdalena
Topography of Cesar Cesar Topographic 2.png
Topography of Cesar
Topography of Norte de Santander Norte de Santander Topographic 2.png
Topography of Norte de Santander
Topography of Santander Santander Topographic 2.png
Topography of Santander
Municipality
bold is capital
DepartmentAltitude
of urban centre
Inhabitants
2015
Notes
Santa Marta Magdalena
0 m (0 ft)
466,000
Ciénaga Magdalena
10 m (33 ft)
104,897
Zona Bananera Magdalena
30 m (98 ft)
60,524
Aracataca Magdalena
40 m (130 ft)
39,473
Fundación Magdalena
10 m (33 ft)
57,344
Algarrobo Magdalena
24 m (79 ft)
12,576
El Copey Cesar
180 m (590 ft)
27,212
Bosconia Cesar
200 m (660 ft)
37,248
El Paso Cesar
36 m (118 ft)
22,832
Chiriguaná Cesar
40 m (130 ft)
19,650
Curumaní Cesar
112 m (367 ft)
24,367
Chimichagua Cesar
49 m (161 ft)
30,658
Pailitas Cesar
77 m (253 ft)
17,166
Pelaya Cesar
50 m (160 ft)
17,910
La Gloria Cesar
50 m (160 ft)
12,938
El Carmen Norte de Santander
761 m (2,497 ft)
14,005
Teorama Norte de Santander
72 m (236 ft)
21,524
González Cesar
1,240 m (4,070 ft)
6990
Ocaña Norte de Santander
1,202 m (3,944 ft)
98,992
San Martín Cesar
119 m (390 ft)
18,548
San Alberto Cesar
125 m (410 ft)
24,653
Ábrego Norte de Santander
1,398 m (4,587 ft)
38,627
La Esperanza Norte de Santander
1,566 m (5,138 ft)
12,012
Cáchira Norte de Santander
2,025 m (6,644 ft)
10,970
El Playón Santander
469 m (1,539 ft)
11,776
Rionegro Santander
590 m (1,940 ft)
27,114
Bucaramanga Santander
959 m (3,146 ft)
528,575
Floridablanca Santander
925 m (3,035 ft)
266,669
Piedecuesta Santander
1,005 m (3,297 ft)
156,167
Cepitá Santander
660 m (2,170 ft)
1865
San Andrés Santander
1,777 m (5,830 ft)
8540

Tectonic setting

The tectonic history of the Bucaramanga-Santa Marta Fault, separating the Northern Andean from the Maracaibo Block (shown together as ND), is influenced by the interaction of the Malpelo, South American and Caribbean Plates Caribbean plate tectonics-en.png
The tectonic history of the Bucaramanga-Santa Marta Fault, separating the Northern Andean from the Maracaibo Block (shown together as ND), is influenced by the interaction of the Malpelo, South American and Caribbean Plates

The Bucaramanga-Santa Marta Fault system is located in northwestern South America, on the North Andes Plate, where the 20 ± 2 millimetres (0.787 ± 0.079 in)/yr east to southeastward moving Caribbean, [52] 60 mm (2.4 in)/yr eastward subducting Malpelo, [53] and South American Plates converge. Since Early Mesozoic times, the western portion of Colombia was subjected to different episodes of subduction, accretion and collision, at the boundaries of the South America continental and the oceanic Farallon, Nazca, and Caribbean Plates and various island arcs. [54] The interaction of the plate tectonic movements formed the Northern Andean Block, separated from the Maracaibo Block by the Bucaramanga-Santa Marta Fault. [55] The Northern Andean Block is subdivided into tectonic realms, with the Bucaramanga-Santa Marta Fault separating the Central Continental Sub-plate Realm in the west from the Maracaibo Sub-plate Realm in the east. [56] It has been suggested that these two realms are dominated by respectively Nazca and Caribbean Plate subduction. [57] The compressional stress regime caused the formation of the oblique sinistral Bucaramanga-Santa Marta Fault and dextral Oca and Boconó Faults. [58]

The interplay between the Santa Marta and Oca Faults produced offshore Caribbean platforms and valleys north of the Sierra Nevada de Santa Marta near Taganga. [59] Uplift along the western margin of the Santa Marta Fault probably commenced in the Pliocene. [60]

The Bucaramanga Fault intersects with the Boconó Fault at the Santander Massif. [61] In this area, the top of the subducting slab has been estimated at an initial depth of approximately 100 kilometres (62 mi), then a horizontal part for about 50 kilometres (31 mi), and a farther descending section to reach a depth of around 200 kilometres (120 mi). The slab section, called Bucaramanga slab, here has a dip that continues to the oceanic crust of the Caribbean seafloor. Towards the north of the Bucaramanga Nest or Swarm, in a north–south area approximately 200 kilometres (120 mi) in length, a well-defined Wadati-Benioff Zone extending to 175 kilometres (109 mi) depth has been identified. [62]

Activity

Map of seismic threats Mapa de Amenaza Sismica de Colombia.png
Map of seismic threats

A study published in 2009 about the Bucaramanga segment of the fault system revealed that the fault had eight episodes of activity during the late Holocene. [63] The most recent activity has been inferred to have been around the year 1020. [64] During this pre-Columbian era, the area around Bucaramanga was inhabited by the indigenous Guane. The authors consider the Bucaramanga Fault therefore as active. [63]

Other faults in the seismically active zone, named Bucaramanga Nest, produced 27 earthquakes of magnitudes 4.0 to 5.3 between May 2012 and January 2013. [65]

Panorama

Panorama Floridablanca, Santander.jpg
View of the Bucaramanga section of the fault east of Floridablanca, Santander

See also

Notes and references

Notes

  1. 1 2 3 4 2017 population data
  2. 2016 population data

Related Research Articles

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The La Quinta Formation is a Jurassic geologic formation which crops out in the Cordillera de Mérida and Serranía del Perijá of western Venezuela and northeastern Colombia. The formation is also present in the subsurface of the Cesar-Ranchería and Maracaibo Basins. At its type locality near La Grita, Táchira, it consists of a basal dacitic tuff followed by interlayered sandstones, tuffs, siltstones and rare limestones. Dinosaur remains including Laquintasaura, Tachiraptor, and Perijasaurus are among the fossils that have been recovered from the formation.

<span class="mw-page-title-main">Paja Formation</span> Early Cretaceous geologic formation of central Colombia

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The Chicamocha Canyon is a steep sided canyon carved by the Chicamocha River in Colombia. With a maximum depth of 2,000 metres (6,600 ft), an area of 108,000 hectares and a length of 227 kilometres (141 mi), the canyon is the second-largest worldwide. The canyon is situated in the departments of Boyacá and Santander, stretching from Soatá in the southeast to Girón and Betulia in the northwest.

<span class="mw-page-title-main">Middle Magdalena Valley</span>

The Middle Magdalena Valley, Middle Magdalena Basin or Middle Magdalena Valley Basin is an intermontane basin, located in north-central Colombia between the Central and Eastern Ranges of the Andes. The basin, covering an area of 34,000 square kilometres (13,000 sq mi), is situated in the departments of Santander, Boyacá, Cundinamarca and Tolima.

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The Honda Group is a geological group of the Upper and Middle Magdalena Basins and the adjacent Central and Eastern Ranges of the Colombian Andes. The group, in older literature also defined as formation, is in its present-day type section in the Tatacoa Desert in the department of Huila subdivided into two main formations; La Victoria and Villavieja.

<span class="mw-page-title-main">Cesar-Ranchería Basin</span> Geologic formation in Colombia

The Cesar-Ranchería Basin is a sedimentary basin in northeastern Colombia. It is located in the southern part of the department of La Guajira and northeastern portion of Cesar. The basin is bound by the Oca Fault in the northeast and the Bucaramanga-Santa Marta Fault in the west. The mountain ranges Sierra Nevada de Santa Marta and the Serranía del Perijá enclose the narrow triangular intermontane basin, that covers an area of 11,668 square kilometres (4,505 sq mi). The Cesar and Ranchería Rivers flow through the basin, bearing their names.

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The Suárez Fault is a sinistral oblique thrust fault in the department of Santander in northeastern Colombia. The fault has a total length of 98.3 kilometres (61.1 mi) and runs along an average north-northeast to south-southwest strike of 021.1 ± 8 in the Eastern Ranges of the Colombian Andes from Barbosa in the south to Bucaramanga in the north, where it connects with the regional Bucaramanga-Santa Marta Fault.

The Tarra Fault is a thrust fault in the department of Norte de Santander in Colombia. The fault has a total length of 26.8 kilometres (16.7 mi) and runs along an average north-northeast to south-southwest strike of 007.6 ± 8 in the Eastern Ranges of the Colombian Andes.

<span class="mw-page-title-main">Oliní Group</span> Fossiliferous geological group

The Oliní Group (Spanish: Grupo Oliní, K3k5o, K2ol, Kso) is a fossiliferous geological group of the VMM, VSM and the eastern flanks of the Central and western flanks of the Eastern Ranges of the Colombian Andes. The regional group stretches from north to south across approximately 700 kilometres (430 mi) and dates to the Late Cretaceous period; Coniacian, Santonian and Campanian epochs, and has a maximum thickness of 287 metres (942 ft). Fossils of Eonatator coellensis have been found in the unit, near Coello, Tolima.

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La Guajira Terrane is one of the geological provinces (terranes) of Colombia. The terrane, dating to the Late Cretaceous, is situated on the North Andes Plate and borders the Caribbean, Tahamí and Chibcha Terranes along the Bucaramanga-Santa Marta Fault. The southern boundary is formed by the Oca Fault with the Chibcha Terrane.

<span class="mw-page-title-main">Caribbean Terrane</span> Geological province of Colombia

The Caribbean Terrane is a geological province (terrane) of Colombia. The terrane, dating to the Late Cretaceous, is situated on the North Andes Plate and borders the La Guajira, Chibcha and underlying Tahamí Terrane along the regional Bucaramanga-Santa Marta Fault. The terrane overlies the Tahamí, Arquía and Quebradagrande Terranes along the Romeral Fault System.

<span class="mw-page-title-main">Chibcha Terrane</span>

The Chibcha Terrane, named after Chibcha, is the largest of the geological provinces (terranes) of Colombia. The terrane, the oldest explored domains of which date to the Meso- to Neoproterozoic, is situated on the North Andes Plate. The megaregional Romeral Fault System forms the contact of the terrane with the Tahamí Terrane. The contact with the Caribbean and La Guajira Terranes is formed by the regional Bucaramanga-Santa Marta Fault. The northeastern boundary is formed by the regional Oca Fault, bounding the La Guajira Terrane. The terrane is emplaced over the Río Negro-Juruena Province of the Amazonian Craton along the megaregional Eastern Frontal Fault System.

<span class="mw-page-title-main">Tahamí Terrane</span>

The Tahamí or Tahamí-Panzenú Terrane is one of the geological provinces (terranes) of Colombia. The terrane, dating to the Permo-Triassic, is situated on the North Andes Plate. The contact with the Chibcha, Arquía and Quebradagrande Terranes is formed by the megaregional Romeral Fault System. A tiny terrane is located at the contact with the Quebradagrande Terrane; Anacona Terrane.

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<span class="mw-page-title-main">Girón Formation</span>

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The Noreán Formation is a geological formation of the Eastern Ranges of the Colombian Andes, the Serranía de San Lucas and as basement underlying the southernmost Lower and northern Middle Magdalena Valleys. The formation consists of volcanic and pyroclastic lavas that range from andesites to rhyolites. Vitric, lithic and crystal tuffs and andesitic dikes and hypabyssal bodies are also present in the formation.

References

  1. Jiménez Díaz, 2013, p. 56
  2. 1 2 Paris et al., 2000, p. 10
  3. Cuéllar et al., 2012, p. 77
  4. Plancha 11, 1998
  5. Plancha 18, 1999
  6. Plancha 19, 2007
  7. Plancha 26, 2007
  8. Plancha 33, 2007
  9. 1 2 Plancha 40, 2002
  10. Plancha 47, 2001
  11. Plancha 55, 2006
  12. Plancha 65, 1994
  13. Plancha 66, 2009
  14. Plancha 76, 1980
  15. Plancha 86, 1981
  16. Plancha 97, 1981
  17. Plancha 120, 1977
  18. Plancha 136, 1984
  19. Sánchez et al., 2012, p. 3008
  20. DANE, 2015, p. 29
  21. (in Spanish) Official website Santa Marta
  22. (in Spanish) Official website Ciénaga
  23. (in Spanish) Official website Zona Bananera
  24. (in Spanish) Official website Aracataca
  25. (in Spanish) Official website Fundación
  26. (in Spanish) Official website Algarrobo
  27. (in Spanish) Official website El Copey
  28. (in Spanish) Official website Bosconia
  29. (in Spanish) Official website El Paso, Cesar
  30. (in Spanish) Official website Chiriguaná
  31. (in Spanish) Official website Curumaní
  32. (in Spanish) Official website Chimichagua
  33. (in Spanish) Official website Pailitas
  34. (in Spanish) Official website Pelaya
  35. (in Spanish) Official website La Gloria, Cesar
  36. (in Spanish) Official website El Carmen
  37. (in Spanish) Official website Teorama
  38. (in Spanish) Official website González, Cesar
  39. (in Spanish) Official website Ocaña
  40. (in Spanish) Official website San Martín, Cesar
  41. (in Spanish) Official website San Alberto, Cesar
  42. (in Spanish) Official website Ábrego
  43. (in Spanish) Official website La Esperanza
  44. (in Spanish) Official website Cáchira
  45. (in Spanish) Official website El Playón
  46. (in Spanish) Official website Rionegro
  47. (in Spanish) Official website Bucaramanga
  48. (in Spanish) Official website Floridablanca
  49. (in Spanish) Official website Piedecuesta
  50. (in Spanish) Official website Cepitá
  51. (in Spanish) Official website San Andrés
  52. Egbue et al., 2014, p. 9
  53. Colmenares & Zoback, 2003, p.721
  54. Nevistic et al., 2003, p.132
  55. Colmenares & Zoback, 2003, p. 722
  56. Cediel et al., 2003, p. 818
  57. Yarce et al., 2014, p. 57
  58. Idárraga García et al., 2011, p. 44
  59. Posada Posada et al., 2012, p. 103
  60. Idárraga García et al., 2011, p. 57
  61. Diederix et al., 2009, p. 19
  62. Colmenares & Zoback, 2003, p. 723
  63. 1 2 Diederix et al., 2009, p. 23
  64. Diederix et al., 2009, p. 21
  65. Perico & Perico, 2014, p. 6

Bibliography

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