Noreán Formation
Noreán Formation Stratigraphic range: Sinemurian-Toarcian | |
---|---|
![]() Outcrop of the Effusive Rhyolitic Unit (Jner) south of Pailitas, Cesar[1] | |
Type | Geological formation |
Sub-units | See text |
Underlies | & |
Overlies | , & , & |
Thickness | 2,062 m (6,765 ft) |
Lithology | |
Primary | Andesitic-rhyolitic lavas & pyroclastics |
Other | Ignimbrites, thin sandstones |
Location | |
Coordinates | 8°00′00″N 74°00′00″W / 8.00000°N 74.00000°WCoordinates: 8°00′00″N 74°00′00″W / 8.00000°N 74.00000°W |
Region | Bolívar, Cesar & Santander |
Country | ![]() |
Extent | Serranía de San Lucas & Eastern Ranges, Andes & VMM (subsurface) |
Type section | |
Named for | Caserío Noreán |
Named by | Clavijo |
Location | Aguachica |
Year defined | 1995 |
Coordinates | 8°22′54″N 73°36′38″W / 8.38167°N 73.61056°W |
Region | Cesar |
Country | ![]() |
![]() Paleogeography of Northern South America 200 Ma, by Ron Blakey |
The Noreán Formation (Spanish: Formación Noreán, J1-2n,[2][3] J1n)[4] is a geological formation of the Eastern Ranges of the Colombian Andes, the Serranía de San Lucas and as basement underlying the southernmost 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.
The more than 2,000 metres (6,600 ft) thick formation was deposited in a continental arc magmatic setting in an Early Jurassic graben that presently forms the basement of the Middle Magdalena Valley (VMM). A positive anomaly of Pb suggests a subduction-related genesis dominated by explosive volcanism.
Etymology[]
The Noreán Formation was first defined as the "Unidad Volcanoclástica de Noreán" ("Volcanoclastic Unit of Noreán") in 1995 and in the same year elevated to a formal formation by Clavijo in 1995 as part of the geologic mapping for Plancha 65 Tamalameque and named after the caserío Noreán, 1 kilometre (0.62 mi) north of Aguachica, Cesar.[5] The type locality of the Noreán Formation is along the road between Buturama and Bombeadero in Aguachica.[6]
Description[]
The Noreán Formation is found in the northern part of the Eastern Ranges of the Colombian Andes, stretching from the Cesar Department in the north, towards the Serranía de San Lucas in Bolívar to the in Santander in the south. The formation forms the economic basement in the southern (VIM) and the northern Middle Magdalena Valley (VMM). The formation is interpreted as characteristic of an important explosive volcanic phase, the materials of which were deposited in a graben setting of the Middle Magdalena Valley. The Early Jurassic basin was covered by a shallow sea and in part drained by rivers and lakes. The basin at time of deposition was bordered by a volcanic arc, characterized by basaltic to calc-alkaline magmas.[7] The formation also comprises less than 1 metre (3.3 ft) thin very fine to fine sandstone beds constituting quartz (90 to 60 %), feldspars (10 to 40 %) and lithic fragments (1-2 %).[8]
The volcanic and pyroclastic rocks of the Noreán Formation are composed of lavas that range from andesitic to rhyolitic, together with vitric, lithic and crystal tuffs. Mainly andesitic dikes and hypabyssal bodies are also present. Geochemically, the volcanic and pyroclastic rocks exhibit chemical similarities, belong to the calc-alkaline series and have negative anomalies of Nb, P and Ti and a positive anomaly of Pb, suggesting a subduction-related genesis.[9]
U-Pb zircon geochronology resulted in ages of 192.4 ± 2.2 Ma in a basaltic andesite, 184.9 ± 2.0 Ma in an andesitic lava and 175.9 ± 1.1 Ma in a rhyolitic lava, indicating the occurrence of volcanic events in this section of the Noreán Formation from the Lower to the earliest Middle Jurassic. Zircon inheritance suggests that the volcanic arc was emplaced in a Meso- to Neoproterozoic basement. The Noreán Formation represents continental arc magmatism,[9] which occurred during a phase of extensional tectonics along the continental margin of northwestern South America from approximately 195 to 168 Ma.[10]
Stratigraphy[]
To the northwest of the Santander Massif, the formation overlies the and is unconformably overlain by the .[6] In some locations in this area, the formation is found in faulted contact with the , and the Tablazo and . In the Serranía de San Lucas, the Noreán Formation conformably overlies the and in this area is overlain by the Tablazo Formation and the Arenal Conglomeratic Unit. Across the San Lucas mountains, the formation is in faulted and discordant contact with the , the and the .[7]
The formation is offset by the megaregional Bucaramanga-Santa Marta Fault.[3][1]
Subdivision[]
On the western flanks of the Eastern Cordillera, the formation is subdivided into six units and in the Serranía de San Lucas into four (1, 3, 5 and 6 of the six named below), from young to old:
- Hypobyssal Andesitic Unit (Jnha) - 12 metres (39 ft)[11]
- Effusive Rhyolitic Unit (Jner) - 150 metres (490 ft)[12]
- Dacitic Effusive Unit (Jned) - 350 metres (1,150 ft)[13]
- Pyroclastic and Effusive Dacitic Unit (Jnpd) - 450 metres (1,480 ft)[14]
- Effusive Spherulitic Unit (Jnee) - 300 metres (980 ft)[15]
- Pyroclastic-epiclastic Unit (Jnpe) - 800 metres (2,600 ft)[16]
Age[]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/3/30/Geologic_map_of_the_northern_Middle_Magdalena_Valley_with_Nore%C3%A1n_Formation_age_dating_sites.jpg/250px-Geologic_map_of_the_northern_Middle_Magdalena_Valley_with_Nore%C3%A1n_Formation_age_dating_sites.jpg)
The age of the Noreán Formation has been established using potassium-argon (K-Ar), rubidium-strontium (Rb-Sr), and uranium-lead dating (U-Pb). The first method gave an age range of 194 ± 6 Ma, the Rb-Sr dating method provided a range of 161 ± 27 Ma and U-Pb dating of zircons resulted in ages of 201.6 ± 3.6 and 196.1 ± 4.4.[7] Refined dating of the formation performed in 2019 by Correa Martínez et al. concluded an age range between 192.4 ± 2.2 and 175.9 ± 1.1 Ma, spanning most of the Early Jurassic, from Sinemurian to Toarcian.[17] The Noreán Formation was intruded by the in the Middle Jurassic, dated at 166.9 ± 6 Ma.[18] A 2020 thermochronological study concluded that the Jurassic volcanic rocks covering the Santander Massif were exhumed during the latest Cretaceous to early Paleocene.[19]
Outcrops[]
The northernmost outcrop of the Noreán Formation is found in Chimichagua, Cesar.[2] In Cesar, outcrops occur south of the village of Saloa and around the town of Pailitas,[3] east of Tamalameque and Pelaya and west of La Gloria,[1] in the western part of Morales, Bolívar, north and east of Aguachica where its type locality is situated,[20] in the Serranía de San Lucas, where the urban center of Santa Rosa del Sur rests on top of the formation,[21] in the west of San Pablo, Bolívar,[22] and in the western part of Cantagallo, Bolívar.[23]
Regional correlations[]
In the Santander Massif, the Noreán Formation has been correlated to the , while in the Serranía de San Lucas the formation correlates with and is partly overlying the Morrocoyal Formation. In the Sierra Nevada de Santa Marta of northern Colombia, the Noreán Formation is considered equivalent with the , the and and the ignimbrite complexes of Caja de Ahorros, La Paila and La Piña. In the Serranía del Perijá to the east of the extent of the formation, the Noreán Formation correlates with La Quinta Formation. In the La Guajira peninsula, the formation is time-equivalent with the while to the south of its area in the the Noreán Formation is correlated with the .[7] The Lower Jurassic is missing in the Llanos Basin to the southeast of the extent of the Eastern Cordillera.[24]
Ma | Age | Paleomap | Regional events | proximal Llanos | distal Llanos | Environments | Maximum thickness | Petroleum geology | Notes | ||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0.01 | Holocene | ![]() |
Holocene volcanism Seismic activity |
alluvium | Overburden | ||||||||
1 | Pleistocene | ![]() |
Pleistocene volcanism Andean orogeny 3 Glaciations |
Soatá Sabana |
Alluvial to fluvial (Guayabo) | 550 m (1,800 ft) (Guayabo) |
[25][26][27][28] | ||||||
2.6 | Pliocene | ![]() |
Pliocene volcanism Andean orogeny 3 GABI |
Subachoque | |||||||||
5.3 | Messinian | Andean orogeny 3 Foreland |
Marichuela | Honda | [27][29] | ||||||||
13.5 | Langhian | Regional flooding | hiatus | Lacustrine (León) | 400 m (1,300 ft) (León) |
Seal | [28][30] | ||||||
16.2 | Burdigalian | Miocene inundations Andean orogeny 2 |
Proximal fluvio-deltaic (C1) | 850 m (2,790 ft) (Carbonera) |
Reservoir | [29][28] | |||||||
17.3 | Distal lacustrine-deltaic (C2) | Seal | |||||||||||
19 | Proximal fluvio-deltaic (C3) | Reservoir | |||||||||||
21 | Early Miocene | Pebas wetlands | Barzalosa | Distal fluvio-deltaic (C4) | Seal | ||||||||
23 | Late Oligocene | ![]() |
Andean orogeny 1 Foredeep |
Proximal fluvio-deltaic (C5) | Reservoir | [26][29] | |||||||
25 | Distal fluvio-lacustrine (C6) | Seal | |||||||||||
28 | Early Oligocene | Proximal deltaic-marine (C7) | Reservoir | [26][29][31] | |||||||||
32 | Oligo-Eocene | Usme | onlap | Marine-deltaic (C8) | Seal Source |
[31] | |||||||
35 | Late Eocene | ![]() |
Coastal (Mirador) | 240 m (790 ft) (Mirador) |
Reservoir | [28][32] | |||||||
40 | Middle Eocene | Regadera | hiatus | ||||||||||
45 | |||||||||||||
50 | Early Eocene | ![]() |
Deltaic (Los Cuervos) | 260 m (850 ft) (Los Cuervos) |
Seal Source |
[28][32] | |||||||
55 | Late Paleocene | PETM 2000 ppm CO2 |
Bogotá | ||||||||||
60 | Early Paleocene | SALMA | Barco | Guaduas | Fluvial (Barco) | 225 m (738 ft) (Barco) |
Reservoir | [25][26][29][28][33] | |||||
65 | Maastrichtian | ![]() |
KT extinction | Guadalupe | Deltaic-fluvial (Guadalupe) | 750 m (2,460 ft) (Guadalupe) |
Reservoir | [25][28] | |||||
72 | Campanian | End of rifting | [28][34] | ||||||||||
83 | Santonian | Villeta/Güagüaquí | |||||||||||
86 | Coniacian | ||||||||||||
89 | Turonian | Cenomanian-Turonian anoxic event | Chipaque | Gachetá | hiatus | Restricted marine (all) | 500 m (1,600 ft) (Gachetá) |
Source | [25][28][35] | ||||
93 | Cenomanian | ![]() |
Rift 2 | ||||||||||
100 | Albian | Une | Une | Caballos | Deltaic (Une) | 500 m (1,600 ft) (Une) |
Reservoir | [29][35] | |||||
113 | Aptian | ![]() |
Fómeque | Open marine (Fómeque) | 800 m (2,600 ft) (Fómeque) |
Source (Fóm) | [26][28][36] | ||||||
125 | Barremian | High biodiversity | Paja | Shallow to open marine (Paja) | 940 m (3,080 ft) (Paja) |
Reservoir | [25] | ||||||
129 | Hauterivian | ![]() |
Rift 1 | Las Juntas | hiatus | Deltaic (Las Juntas) | 910 m (2,990 ft) (Las Juntas) |
Reservoir (LJun) | [25] | ||||
133 | Valanginian | Macanal Rosablanca |
Restricted marine (Macanal) | 2,935 m (9,629 ft) (Macanal) |
Source (Mac) | [26][37] | |||||||
140 | Berriasian | Girón | |||||||||||
145 | Tithonian | Break-up of Pangea | Arcabuco | Alluvial, fluvial (Buenavista) | 110 m (360 ft) (Buenavista) |
"Jurassic" | [29][38] | ||||||
150 | Early-Mid Jurassic | ![]() |
Passive margin 2 | La Quinta | Noreán |
hiatus | Coastal tuff (La Quinta) | 100 m (330 ft) (La Quinta) |
[39] | ||||
201 | Late Triassic | ![]() |
[29] | ||||||||||
235 | Early Triassic | ![]() |
Pangea | hiatus | "Paleozoic" | ||||||||
250 | Permian | ![]() |
|||||||||||
300 | Late Carboniferous | ![]() |
Famatinian orogeny | () |
[40] | ||||||||
340 | Early Carboniferous | Fossil fish Romer's gap |
Cuche (355-385) |
() |
Deltaic, estuarine (Cuche) | 900 m (3,000 ft) (Cuche) |
|||||||
360 | Late Devonian | ![]() |
Passive margin 1 | Río Cachirí (360-419) |
() |
Alluvial-fluvial-reef (Farallones) | 2,400 m (7,900 ft) (Farallones) |
[37][41][42][43][44] | |||||
390 | Early Devonian | ![]() |
High biodiversity | Floresta (387-400) |
Shallow marine (Floresta) | 600 m (2,000 ft) (Floresta) |
|||||||
410 | Late Silurian | ||||||||||||
425 | Early Silurian | hiatus | |||||||||||
440 | Late Ordovician | ![]() |
Rich fauna in Bolivia | (450-490) |
() |
||||||||
470 | Early Ordovician | First fossils | (>470±22) |
() |
() |
() |
[45][46][47] | ||||||
488 | Late Cambrian | ![]() |
Regional intrusions | (490-515) |
() |
() |
(490-590) |
() |
[48][49] | ||||
515 | Early Cambrian | Cambrian explosion | [47][50] | ||||||||||
542 | Ediacaran | ![]() |
Break-up of Rodinia | pre-Quetame | post-Parguaza | () |
Yellow: allochthonous basement (Chibcha Terrane) Green: autochthonous basement (Río Negro-Juruena Province) |
Basement | [51][52] | ||||
600 | Neoproterozoic | ![]() |
Cariri Velhos orogeny | (600-1400) |
pre-Guaviare | [48] | |||||||
800 | ![]() |
Snowball Earth | [53] | ||||||||||
1000 | Mesoproterozoic | ![]() |
Sunsás orogeny | (1000) |
(1030-1100) |
[54][55][56][57] | |||||||
1300 | pre-Ariarí | (1300-1400) |
(1180-1550) |
[58] | |||||||||
1400 | ![]() |
pre-Bucaramanga | [59] | ||||||||||
1600 | Paleoproterozoic | (1500-1700) |
pre-Garzón | [60] | |||||||||
1800 | ![]() |
(1800) |
[58][60] | ||||||||||
1950 | pre-Mitú | [58] | |||||||||||
2200 | Columbia | ||||||||||||
2530 | Archean | ![]() |
[58] | ||||||||||
3100 | Kenorland | ||||||||||||
Sources |
- Legend
- group
- important formation
- fossiliferous formation
- minor formation
- (age in Ma)
- proximal Llanos (Medina)[note 1]
- distal Llanos (Saltarin 1A well)[note 2]
See also[]
- Geology of the Altiplano Cundiboyacense
- Geology of the Eastern Hills
- Cesar-Ranchería Basin, sedimentary basin to the northeast of the Noreán extent
- Central Atlantic magmatic province, megaregional igneous province of the Early Jurassic
- Nacientes del Biobío Formation, contemporaneous volcanic formation of central Chile and western Argentina
- Pan de Azúcar Formation, contemporaneous volcanic formation of northern Chile
Notes[]
References[]
- ^ a b c Plancha 65, 1994
- ^ a b Plancha 47, 2001
- ^ a b c Plancha 55, 2006
- ^ González Iregui et al., 2015, p.56
- ^ Royero, 1996, p.10
- ^ a b Correa Martínez et al., 2019, p.31
- ^ a b c d Correa Martínez et al., 2019, p.32
- ^ González Iregui et al., 2015, p.58
- ^ a b Correa Martínez et al., 2019, p.29
- ^ Rodríguez García et al., 2020, p.43
- ^ Royero, 1996, p.16
- ^ Royero, 1996, pp.15-16
- ^ Royero, 1996, p.15
- ^ Royero, 1996, pp.13-15
- ^ Royero, 1996, p.12
- ^ Royero, 1996, pp.11-12
- ^ Correa Martínez et al., 2019, p.43
- ^ Clavijo et al., 2008, p.52
- ^ Amaya Ferreira et al., 2020, p.11
- ^ Plancha 75, 1992
- ^ Plancha 85, 2006
- ^ Plancha 96, 2006
- ^ Plancha 108, 2012
- ^ Barrero et al., 2007, p.70
- ^ a b c d e f García González et al., 2009, p.27
- ^ a b c d e f García González et al., 2009, p.50
- ^ a b García González et al., 2009, p.85
- ^ a b c d e f g h i j Barrero et al., 2007, p.60
- ^ a b c d e f g h Barrero et al., 2007, p.58
- ^ Plancha 111, 2001, p.29
- ^ a b Plancha 177, 2015, p.39
- ^ a b Plancha 111, 2001, p.26
- ^ Plancha 111, 2001, p.24
- ^ Plancha 111, 2001, p.23
- ^ a b Pulido & Gómez, 2001, p.32
- ^ Pulido & Gómez, 2001, p.30
- ^ a b Pulido & Gómez, 2001, pp.21-26
- ^ Pulido & Gómez, 2001, p.28
- ^ Correa Martínez et al., 2019, p.49
- ^ Plancha 303, 2002, p.27
- ^ Terraza et al., 2008, p.22
- ^ Plancha 229, 2015, pp.46-55
- ^ Plancha 303, 2002, p.26
- ^ Moreno Sánchez et al., 2009, p.53
- ^ Mantilla Figueroa et al., 2015, p.43
- ^ Manosalva Sánchez et al., 2017, p.84
- ^ a b Plancha 303, 2002, p.24
- ^ a b Mantilla Figueroa et al., 2015, p.42
- ^ Arango Mejía et al., 2012, p.25
- ^ Plancha 350, 2011, p.49
- ^ Pulido & Gómez, 2001, pp.17-21
- ^ Plancha 111, 2001, p.13
- ^ Plancha 303, 2002, p.23
- ^ Plancha 348, 2015, p.38
- ^ Planchas 367-414, 2003, p.35
- ^ Toro Toro et al., 2014, p.22
- ^ Plancha 303, 2002, p.21
- ^ a b c d Bonilla et al., 2016, p.19
- ^ Gómez Tapias et al., 2015, p.209
- ^ a b Bonilla et al., 2016, p.22
- ^ a b Duarte et al., 2019
- ^ García González et al., 2009
- ^ Pulido & Gómez, 2001
- ^ García González et al., 2009, p.60
Bibliography[]
- Different Levels of Exhumation across the Bucaramanga Fault in the Cepitá Area of the Southwestern Santander Massif, Colombia: Implications for the Tectonic Evolution of the Northern Andes in Northwestern South America. Servicio Geológico Colombiano Publicaciones Especiales 37. 1–17. Accessed 2020-07-13. ; , and . 2020.
- Diverse Jurassic Magmatic Arcs of the Colombian Andes: Constraints from Petrography, Geochronology, and Geochemistry. Servicio Geológico Colombiano Publicaciones Especiales 36. 1–54. Accessed 2020-07-13. ; ; ; ; ; , and . 2020.
- Petrografía, geoquímica y geocronología U-Pb de las rocas volcánicas y piroclásticas de la Formación Noreán al NW del Macizo de Santander, Colombia. Boletín de Geología 41. 29–54. Accessed 2019-10-31.
Material was copied from this source, which is available under a Creative Commons Attribution 4.0 International License.
; ; , and . 2019. - Servicio Geológico Colombiano. ; ; ; ; , and . 2015. Memoria de la Plancha 56 - San Roque - 1:100,000, 1–147.
- Evolución geológica de la Serranía de San Lucas, norte del Valle Medio del Magdalena y noroeste de la Cordillera Oriental. Boletín de Geología 30. 45–62. Accessed 2020-07-13. ; ; ; , and . 2008.
- ; ; , and . 2007. Colombian Sedimentary Basins: Nomenclature, Boundaries and Petroleum Geology, a New Proposal, 1–92. .
- INGEOMINAS. . 1996. Memoria de la Plancha 65 - Tamalameque - 1:100,000, 1–78.
Maps[]
- Plancha 47 - Chiriguaná - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06. ; , and . 2001.
- Plancha 55 - El Banco - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06. , and . 2006.
- Plancha 65 - Tamalameque - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06. ; ; ; ; ; , and . 1994.
- Plancha 75 - Aguachica - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06. ; ; ; ; , and . 1992.
- Plancha 85 - Simití - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06. , and . 2006.
- Plancha 96 - Bocas del Rosario - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06. , and . 2006.
- Plancha 108 - Puerto Wilches - 1:100,000, 1. Servicio Geológico Colombiano. Accessed 2018-06-01. . 2012.
- Geologic formations of Colombia
- Jurassic System of South America
- Early Jurassic South America
- Jurassic Colombia
- Pliensbachian Stage
- Sinemurian Stage
- Toarcian Stage
- Tuff formations
- Jurassic volcanism
- Fluvial deposits
- Lacustrine deposits
- Shallow marine deposits
- Geography of Bolívar Department
- Geography of Cesar Department
- Geography of Santander Department