The Jura-Cretaceous tectonic Lineament of Santa Lucia-Aiguá-Merin (Uruguay): Kinematic evidences of dextral transcurrent faults and preexisting structural controls
There are new evidences providing a general oblique-extensional kinematics associated with dextral transcurrent displacement within the Santa Lucia-Aiguá-Merin rift-zone in Uruguay, during the Juro-Cretaceous period. It was studied in two particular regions from the Uruguayan Shield's central d...
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2007
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v62_n1_p92_Rossello http://hdl.handle.net/20.500.12110/paper_00044822_v62_n1_p92_Rossello |
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paper:paper_00044822_v62_n1_p92_Rossello2023-06-08T14:26:02Z The Jura-Cretaceous tectonic Lineament of Santa Lucia-Aiguá-Merin (Uruguay): Kinematic evidences of dextral transcurrent faults and preexisting structural controls Basaltic dykes Juro-Cretaceous Kinematics Santa Lucia-Aiguá-Merin rift-zone Transtension Uruguay basement rock Cretaceous displacement extensional tectonics gravity anomaly kinematics lineament rift zone strike-slip fault structural control tectonic evolution transtension Lavalleja Santa Lucia Basin South America Uruguay There are new evidences providing a general oblique-extensional kinematics associated with dextral transcurrent displacement within the Santa Lucia-Aiguá-Merin rift-zone in Uruguay, during the Juro-Cretaceous period. It was studied in two particular regions from the Uruguayan Shield's central domain: i) West from Minas's region, with the presence of a basic dyke swarm, some subordinate faults cutting Lavalleja Group, and the dextral dragging of Precambrian quartzites in the southern edge of Santa Lucia Basin, and ii) Southeast from Mariscala's region, where various E-W graben (i.e. Aigua, Mariscala...) show remnants of Juro-Cretaceous volcanic rocks. Their assemblage may provide clues to interpret them as parts of a transcurrent system. Santa Lucia-Aigua-Merin rift developed in NE direction, with border zones controlled by N70°E strike faults, reworking the preexistent basement anisotropies. These anisotropies are quite different in each domain of Uruguayan Shield (almost 3). In the central domain, N15°E and N50°E striking ones are conspicuous. Finally, in this transtensional environment, the age of some conglomeratic units are discussed as well as the tectonic and economic significances from the Laguna Merin strong gravimetric anomaly, that is located in the rift's eastern edge. 2007 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v62_n1_p92_Rossello http://hdl.handle.net/20.500.12110/paper_00044822_v62_n1_p92_Rossello |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Basaltic dykes Juro-Cretaceous Kinematics Santa Lucia-Aiguá-Merin rift-zone Transtension Uruguay basement rock Cretaceous displacement extensional tectonics gravity anomaly kinematics lineament rift zone strike-slip fault structural control tectonic evolution transtension Lavalleja Santa Lucia Basin South America Uruguay |
| spellingShingle |
Basaltic dykes Juro-Cretaceous Kinematics Santa Lucia-Aiguá-Merin rift-zone Transtension Uruguay basement rock Cretaceous displacement extensional tectonics gravity anomaly kinematics lineament rift zone strike-slip fault structural control tectonic evolution transtension Lavalleja Santa Lucia Basin South America Uruguay The Jura-Cretaceous tectonic Lineament of Santa Lucia-Aiguá-Merin (Uruguay): Kinematic evidences of dextral transcurrent faults and preexisting structural controls |
| topic_facet |
Basaltic dykes Juro-Cretaceous Kinematics Santa Lucia-Aiguá-Merin rift-zone Transtension Uruguay basement rock Cretaceous displacement extensional tectonics gravity anomaly kinematics lineament rift zone strike-slip fault structural control tectonic evolution transtension Lavalleja Santa Lucia Basin South America Uruguay |
| description |
There are new evidences providing a general oblique-extensional kinematics associated with dextral transcurrent displacement within the Santa Lucia-Aiguá-Merin rift-zone in Uruguay, during the Juro-Cretaceous period. It was studied in two particular regions from the Uruguayan Shield's central domain: i) West from Minas's region, with the presence of a basic dyke swarm, some subordinate faults cutting Lavalleja Group, and the dextral dragging of Precambrian quartzites in the southern edge of Santa Lucia Basin, and ii) Southeast from Mariscala's region, where various E-W graben (i.e. Aigua, Mariscala...) show remnants of Juro-Cretaceous volcanic rocks. Their assemblage may provide clues to interpret them as parts of a transcurrent system. Santa Lucia-Aigua-Merin rift developed in NE direction, with border zones controlled by N70°E strike faults, reworking the preexistent basement anisotropies. These anisotropies are quite different in each domain of Uruguayan Shield (almost 3). In the central domain, N15°E and N50°E striking ones are conspicuous. Finally, in this transtensional environment, the age of some conglomeratic units are discussed as well as the tectonic and economic significances from the Laguna Merin strong gravimetric anomaly, that is located in the rift's eastern edge. |
| title |
The Jura-Cretaceous tectonic Lineament of Santa Lucia-Aiguá-Merin (Uruguay): Kinematic evidences of dextral transcurrent faults and preexisting structural controls |
| title_short |
The Jura-Cretaceous tectonic Lineament of Santa Lucia-Aiguá-Merin (Uruguay): Kinematic evidences of dextral transcurrent faults and preexisting structural controls |
| title_full |
The Jura-Cretaceous tectonic Lineament of Santa Lucia-Aiguá-Merin (Uruguay): Kinematic evidences of dextral transcurrent faults and preexisting structural controls |
| title_fullStr |
The Jura-Cretaceous tectonic Lineament of Santa Lucia-Aiguá-Merin (Uruguay): Kinematic evidences of dextral transcurrent faults and preexisting structural controls |
| title_full_unstemmed |
The Jura-Cretaceous tectonic Lineament of Santa Lucia-Aiguá-Merin (Uruguay): Kinematic evidences of dextral transcurrent faults and preexisting structural controls |
| title_sort |
jura-cretaceous tectonic lineament of santa lucia-aiguá-merin (uruguay): kinematic evidences of dextral transcurrent faults and preexisting structural controls |
| publishDate |
2007 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v62_n1_p92_Rossello http://hdl.handle.net/20.500.12110/paper_00044822_v62_n1_p92_Rossello |
| _version_ |
1768545489049878528 |