Miocene vanishing of the Central American Seaway between the Panama Arc and the South American Plate

被引：0

作者：

Vallejo-Hincapiel, Felipe ^{[1
,2
,3
,4
]}

Pardo-Trujillo, Andres ^{[1
,2
,5
]}

Barbosa-Espitia, Angel ^{[1
,2
,6
]}

Aguirre, Daniela ^{[1
,2
]}

Celis, Sergio A. ^{[2
,7
]}

Giraldo-Villegas, Carlos A. ^{[2
,7
]}

Plata-Torres, Angelo ^{[1
,2
,3
]}

Trejos-Tamayo, Raul ^{[1
,2
,3
]}

Salazar-Rios, Andres ^{[1
,2
,3
,8
]}

Flores, Jose-Abel ^{[3
]}

Aubry, Marie-Pierre ^{[9
]}

Gallego, Fabian ^{[1
,2
]}

Delgado, Eduardo ^{[1
,2
]}

Foster, David ^{[10
]}

机构：

[1] Univ Caldas, Inst Invest Estratig Lies, Calle 65 26-10, Manizales 170004, Colombia

[2] Univ Caldas, Grp Invest Estratig & Vulcanol GIEV Cumanday, Calle 65 26-10, Manizales 170004, Colombia

[3] Univ Salamanca, Dept Geol, Salamanca 37008, Spain

[4] Smithsonian Trop Res Inst, Panama City 084303092, Panama

[5] Univ Caldas, Dept Ciencias Geol, Calle 65 26-10, Manizales 170004, Colombia

[6] Univ Nacl Colombia, Dept Geog, Km 9 Via Valledupar La Paz, La Paz 202017, Cesar, Colombia

[7] Univ Granada, Dept Estratig & Paleontol, Ave Fuentenueva S-N, Granada 18002, Spain

[8] Universalmuseum Joanneum, Dept Geol & Paleontol, Weinzottlstr 16, A-8045 Graz, Austria

[9] Rutgers State Univ, Dept Earth & Planetary Sci, 610 Taylor Rd, Piscataway, NJ 08854 USA

[10] Univ Florida, Dept Geol Sci, Gainesville, FL 32611 USA

来源：

GEOLOGICAL SOCIETY OF AMERICA BULLETIN | 2024年 / 136卷 / 11-12期

关键词：

NORTHERN ANDES; MIDDLE MIOCENE; EQUATORIAL PACIFIC; AGGLUTINATED FORAMINIFERA; CALCAREOUS NANNOFOSSILS; BENTHIC FORAMINIFERA; OCEANIC PLATEAU; CLOSURE; ISTHMUS; COLOMBIA;

D O I：

暂无

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

A controversy has developed in recent years regarding the timing of the closure of the Central American Seaway. This tectonic event significantly impacted oceanic circulation between the tropical Pacific and Atlantic oceans and resulted in the formation of a land bridge connecting the South and North American continents. The long-held view of a Pliocene age (ca. 3 Ma) for the closure of the Central American Seaway has been challenged by the proposal that the Panama Arc collided with South America during the Middle Miocene (15-13 Ma) as a deep oceanic gap between them closed along the Uramita suture zone. However, direct geologic evidence from this suture zone to support either interpretation has been lacking. Here, we report on a comprehensive study of three stratigraphic transects across the Uramita suture zone, using a host of methodologies including sedimentological, ichnological, micropaleontological, U-Pb detrital geochronological, and provenance analyses. Our data reveal that lower offshore to slope conditions prevailed in the Central American Seaway along the suture zone during the latest Early to earliest Middle Miocene (16.4-15.1 Ma) and that oceanic conditions there ceased to exist between the Middle and Late Miocene. These results agree with the Middle Miocene age proposed for the Central American Seaway closure along the tectonic boundary. However, other deeper portions of the Central American Seaway persisted in western Colombia, which challenges the notion of a Central American Seaway confined to the suture zone between the Panama Arc and South American Plate during the Middle Miocene.

引用

页码：4798 / 4814

页数：17