Deformational history of the Granjeno Schist, Ciudad Victoria, Mexico: Constraints on the closure of the Rheic Ocean?

David S. Dowe; R. Damian Nance; J. Duncan Keppie; K. L. Cameron; A. Ortega-Rivera; F. Ortega-Gutiérrez; J. W K Lee

Deformational history of the Granjeno Schist, Ciudad Victoria, Mexico: Constraints on the closure of the Rheic Ocean?

David S. Dowe, R. Damian Nance^*, J. Duncan Keppie, K. L. Cameron, A. Ortega-Rivera, F. Ortega-Gutiérrez, J. W K Lee

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

35 Citations (Scopus)

Abstract

Exposed in the core of a NNW-trending frontal anticline of the Laramide fold-thrust belt of northeastern Mexico, the Granjeno Schist comprises a polydeformed assemblage of Paleozoic metasedimentary and metavolcaniclastic rocks and serpentinized mafic-ultramafic units. The earliest deformation (D₁) predates emplacement of a leucogranite at 351 ± 54 Ma and may record obduction of this oceanic unit. Subsequent deformations (D_2a-D_2c) record tectonic juxtapositioning of the Granjeno Schist against the ∼1 Ga Novillo Gneiss by NNW-directed dextral shear under conditions of decreasing temperature. Cooling ages of 313 ± 13 Ma and 300 ± 4 Ma are considered to date the onset of dextral motion, which continued into the Permian. These events are linked to the Late Paleozoic closing of the Rheic Ocean.

Original language	English
Pages (from-to)	920-937
Number of pages	18
Journal	International Geology Review
Volume	47
Issue number	9
Publication status	Published - Sept 2005

Cite this

@article{75aece53162c45e289855d13d116b27d,

title = "Deformational history of the Granjeno Schist, Ciudad Victoria, Mexico: Constraints on the closure of the Rheic Ocean?",

abstract = "Exposed in the core of a NNW-trending frontal anticline of the Laramide fold-thrust belt of northeastern Mexico, the Granjeno Schist comprises a polydeformed assemblage of Paleozoic metasedimentary and metavolcaniclastic rocks and serpentinized mafic-ultramafic units. The earliest deformation (D1) predates emplacement of a leucogranite at 351 ± 54 Ma and may record obduction of this oceanic unit. Subsequent deformations (D2a-D2c) record tectonic juxtapositioning of the Granjeno Schist against the ∼1 Ga Novillo Gneiss by NNW-directed dextral shear under conditions of decreasing temperature. Cooling ages of 313 ± 13 Ma and 300 ± 4 Ma are considered to date the onset of dextral motion, which continued into the Permian. These events are linked to the Late Paleozoic closing of the Rheic Ocean.",

author = "Dowe, {David S.} and Nance, {R. Damian} and Keppie, {J. Duncan} and Cameron, {K. L.} and A. Ortega-Rivera and F. Ortega-Guti{\'e}rrez and Lee, {J. W K}",

year = "2005",

month = sep,

language = "English",

volume = "47",

pages = "920--937",

journal = "International Geology Review",

issn = "0020-6814",

publisher = "Taylor & Francis",

number = "9",

}

TY - JOUR

T1 - Deformational history of the Granjeno Schist, Ciudad Victoria, Mexico

T2 - Constraints on the closure of the Rheic Ocean?

AU - Dowe, David S.

AU - Nance, R. Damian

AU - Keppie, J. Duncan

AU - Cameron, K. L.

AU - Ortega-Rivera, A.

AU - Ortega-Gutiérrez, F.

AU - Lee, J. W K

PY - 2005/9

Y1 - 2005/9

N2 - Exposed in the core of a NNW-trending frontal anticline of the Laramide fold-thrust belt of northeastern Mexico, the Granjeno Schist comprises a polydeformed assemblage of Paleozoic metasedimentary and metavolcaniclastic rocks and serpentinized mafic-ultramafic units. The earliest deformation (D1) predates emplacement of a leucogranite at 351 ± 54 Ma and may record obduction of this oceanic unit. Subsequent deformations (D2a-D2c) record tectonic juxtapositioning of the Granjeno Schist against the ∼1 Ga Novillo Gneiss by NNW-directed dextral shear under conditions of decreasing temperature. Cooling ages of 313 ± 13 Ma and 300 ± 4 Ma are considered to date the onset of dextral motion, which continued into the Permian. These events are linked to the Late Paleozoic closing of the Rheic Ocean.

AB - Exposed in the core of a NNW-trending frontal anticline of the Laramide fold-thrust belt of northeastern Mexico, the Granjeno Schist comprises a polydeformed assemblage of Paleozoic metasedimentary and metavolcaniclastic rocks and serpentinized mafic-ultramafic units. The earliest deformation (D1) predates emplacement of a leucogranite at 351 ± 54 Ma and may record obduction of this oceanic unit. Subsequent deformations (D2a-D2c) record tectonic juxtapositioning of the Granjeno Schist against the ∼1 Ga Novillo Gneiss by NNW-directed dextral shear under conditions of decreasing temperature. Cooling ages of 313 ± 13 Ma and 300 ± 4 Ma are considered to date the onset of dextral motion, which continued into the Permian. These events are linked to the Late Paleozoic closing of the Rheic Ocean.

UR - http://www.scopus.com/inward/record.url?scp=25444497249&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:25444497249

SN - 0020-6814

VL - 47

SP - 920

EP - 937

JO - International Geology Review

JF - International Geology Review

IS - 9

ER -

Deformational history of the Granjeno Schist, Ciudad Victoria, Mexico: Constraints on the closure of the Rheic Ocean?

Abstract

Other files and links

Fingerprint

Cite this