Permian-Carboniferous arc magmatism and basin evolution along the western margin of Pangea: Geochemical and geochronological evidence from the eastern Acatlan Complex, southern Mexico

2012 ◽  
Vol 124 (9-10) ◽  
pp. 1607-1628 ◽  
Author(s):  
M. Kirsch ◽  
J. D. Keppie ◽  
J. B. Murphy ◽  
L. A. Solari
Keyword(s):  
Basin Evolution ◽  
Arc Magmatism ◽  
Southern Mexico ◽  
Western Margin ◽  
Geochronological Evidence ◽  
Acatlan Complex

Extensional Late Paleozoic deformation on the western margin of Pangea, Patlanoaya area, Acatlán Complex, southern Mexico

2008 ◽  
Vol 448 (1-4) ◽  
pp. 60-76 ◽  
Author(s):  
M.A. Ramos-Arias ◽  
J.D. Keppie ◽  
A. Ortega-Rivera ◽  
J.W.K. Lee
Keyword(s):  
Late Paleozoic ◽  
Southern Mexico ◽  
Western Margin ◽  
Acatlan Complex

A high-pressure folded klippe at Tehuitzingo on the western margin of an extrusion zone, Acatlán Complex, southern México

2013 ◽  
Vol 23 (2) ◽  
pp. 641-660 ◽  
Author(s):  
Gonzalo Galaz E. ◽  
J. Duncan Keppie ◽  
James K.W. Lee ◽  
Amabel Ortega-Rivera
Keyword(s):  
High Pressure ◽  
Southern Mexico ◽  
Western Margin ◽  
Acatlan Complex

U–Pb Neoproterozoic–Ordovician protolith age constraints for high- to medium-pressure rocks thrust over low-grade metamorphic rocks in theIxcamilpa area, Acatlán Complex, southern Mexico

2011 ◽  
Vol 48 (1) ◽  
pp. 45-61 ◽  
Author(s):  
M. A. Ramos-Arias ◽  
J. D. Keppie
Keyword(s):  
High Pressure ◽  
Inductively Coupled Plasma ◽  
Volcanic Rocks ◽  
Low Grade ◽  
Southern Mexico ◽  
Western Margin ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Plasma Mass Spectrometry ◽  
Acatlan Complex

High-grade and high-pressure rocks in Acatlán Complex (southern Mexico) are inferred to have been emplaced either during the convergence and collision between Laurentia and Gondwana or during subduction on the western margin of Pangea. In the Ixcamilpa area, such rocks occur in a synformal nappe and are subdivided into (1) the Neoproterozoic–Ordovician Piaxtla Suite (metapsammite, meta-pelite, and amphibolite) that passes structurally upwards from blueschist through eclogite to amphibolite facies; intruded by (2) Cambro-Ordovician megacrystic granitoids; both of which were thrust westwards over (3) the Carboniferous Zumpango Unit consisting of clastic and meta-volcanic rocks. Laser ablation – inductively coupled plasma – mass spectrometry (LA–ICP–MS) U–Pb zircon geochronology yielded age population peaks at (i) 435–490 Ma, probably derived from Acatlán granitoids; (ii) 500–700 Ma, likely derived from the Yucatan Peninsula and Brasiliano orogens; (iii) 800–900 Ma, with provenance in the Goiás arc of eastern Amazonia; and (iv) 950–1300 Ma, sourced either from Oaxaquia, Amazonia, or Laurentia: the younger ca. 310–360 Ma ages are limited to the Zumpango Unit and likely have a local provenance. The overall similarity of the Piaxtla rocks in the Ixcamilpa area and those in the Piaxtla-Mimilulco median belt suggests that Ixcamilpa nappe roots in the median belt, which is interpreted as an extrusion zone within the Acatlán Complex. Since neither high-pressure belt represents a closed ocean, deposition of the Neoproterozoic–Ordovician rocks is inferred to have taken place on the southern margin of Rheic Ocean adjacent to Oaxaquia–Amazonia, whereas the Carboniferous rocks were deposited on the western margin of Pangea synchronous with extrusion of the high-pressure rocks.

Pressure-temperature-time evolution of high-pressure rocks of the Acatlán Complex (southern Mexico): Implications for the evolution of the Iapetus and Rheic Oceans: Reply: Figure 1

2009 ◽  
Vol 121 (9-10) ◽  
pp. 1460-1464 ◽  
Author(s):  
Ricardo Vega-Granillo ◽  
Oscar Talavera-Mendoza ◽  
Diana Meza-Figueroa ◽  
Joaquin Ruiz ◽  
Margarita López-Martínez ◽  
...  
Keyword(s):  
High Pressure ◽  
Time Evolution ◽  
Southern Mexico ◽  
Temperature Time ◽  
Acatlan Complex

Ordovician and Mesoproterozoic Zircons from the Tecomate Formation and Esperanza Granitoids, Acatlán Complex, Southern Mexico: Local Provenance in the Acatlán and Oaxacan Complexes

2004 ◽  
Vol 46 (11) ◽  
pp. 1005-1021 ◽  
Author(s):  
J. L. Sánchez-Zavala ◽  
F. Ortega-Gutiérrez ◽  
J. Duncan Keppie ◽  
G. A. Jenner ◽  
E. Belousova ◽  
...  
Keyword(s):  
Southern Mexico ◽  
Acatlan Complex

Constraints on the subduction erosion/extrusion cycle in the Paleozoic Acatlán Complex of southern Mexico: Geochemistry and geochronology of the type Piaxtla Suite

2012 ◽  
Vol 21 (4) ◽  
pp. 1050-1065 ◽  
Author(s):  
J. Duncan Keppie ◽  
R.D. Nance ◽  
J. Dostal ◽  
J.K.W. Lee ◽  
A. Ortega-Rivera
Keyword(s):  
Southern Mexico ◽  
Subduction Erosion ◽  
Acatlan Complex

Mid-Jurassic Tectonothermal Event Superposed on a Paleozoic Geological Record in the Acatlán Complex of Southern Mexico: Hotspot Activity During the Breakup of Pangea

2004 ◽  
Vol 7 (1) ◽  
pp. 238-260 ◽  
Author(s):  
J. Duncan Keppie ◽  
R. Damian Nance ◽  
J. Dostal ◽  
A. Ortega-Rivera ◽  
Brent V. Miller ◽  
...  
Keyword(s):  
Southern Mexico ◽  
Geological Record ◽  
Tectonothermal Event ◽  
Acatlan Complex
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