Latest Cretaceous and early Tertiary orogenesis in south-central Arizona: Thrust faulting, regional metamorphism, and granitic plutonism

Haxel, Gordon B.; Tosdal, Richard M.; May, Daniel J.; Wright, James E.

doi:10.1130/0016-7606(1984)95<631:lcaeto>2.0.co;2

Cited by 75 publications

(66 citation statements)

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“…The youngest major suite of rocks involved in the deformation found in this area are 57-58 Ma garnet-two-micagranites (Haxel et al, 1984). Laubach and Jackson (1990) noted that the Maria belt occurs along strike of the Mexican orogenic highlands and implied that southwest-directed deformation was responsible for development of basement-cored highlands in the Sierra Madre Oriental.…”

Section: Deformationmentioning

confidence: 97%

Structural and tectonic evolution of Mesozoic basement-involved fold nappes and thrust faults in the Dome Rock Mountains, Arizona

Boettcher¹,

Mosher²,

Tosdal³

2002

Contributions to Crustal Evolution of the Southwestern United States

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In southeastern California and west-central Arizona, Mesozoic polyphase deformation fabrics and basement-involved structures in the MariaTectonic Belt trend west-northwest at a high angle to the Mesozoic magmatic arc and thin-skinned Sevier fold and thrust belt. The Maria belt extends from the Granite Wash and Harquahala Mountains, Arizona, to the Old Woman Mountains and Piute Range, California. All of the ranges in the belt share a common history of northeast-and/or southwestdirected shear superposed on earlier fabrics. Crustal shortening began in the Jurassic and culminated in Late Cretaceous greenschist to amphibolite facies metamorphism and crustal anatexis. Variability of deformation style and poor timing constraints have hampered integration of Maria belt deformation with the rest of the Cordilleran orogen. Our mapping and geochronology in the Dome Rock Mountains provides a framework for establishing the tectonic evolution of the Maria belt within the context of previous models for the Mesozoic Cordilleran orogen. A km-scale F 1 recumbent syncline and associated minor structures in the northern Dome Rock Mountains predate intrusion of ca. 161 Ma leucocratic granite, postdate intrusion of ca. 164 Ma granodiorite, and are interpreted to have accommodated shortening along the northern margin of the Middle Jurassic magmatic arc. F 2 folds and shear zones deform ca. 161 Ma leucocratic granite and are attributed to top-tothe-southwest, reverse-sense motion in the footwall of the Tyson thrust. Southwestdirected deformation in the northern Dome Rock Mountains ceased prior to the intrusion of a Late Cretaceous granite that crosscuts the Tyson thrust. Northeastdirected extensional strain (D 3 ) reactivated previously southwest-vergent shear zones and resulted in translation of Triassic metasedimentary rocks down to the northeast from an original position in the core of an F 1 /F 2 fold nappe. Extensional structures are recognized in Late Cretaceous granite that developed prior to middle Tertiary Cordilleran metamorphic core complexes as indicated by early Tertiary biotite 40 Ar/ 39 Ar and K/Ar cooling ages from mylonitic rocks. Boettcher, S.S., Mosher, S., and Tosdal, R.M., 2002, Structural and tectonic evolution of Mesozoic basement-involved fold nappes and thrust faults in the Dome Rock Mountains, Arizona, in Barth, A., ed., Contributions to Crustal Evolution of the Southwestern

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Section: Deformationmentioning

confidence: 97%

Structural and tectonic evolution of Mesozoic basement-involved fold nappes and thrust faults in the Dome Rock Mountains, Arizona

Boettcher¹,

Mosher²,

Tosdal³

2002

Contributions to Crustal Evolution of the Southwestern United States

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“…A Paleocene migmatization event has not been reported in Sonora, but a Laramide tectonic event is assumed by many authors to have synchronously occurred with the Laramide magmatic arc (Haxel et al, 1984;Goodwin and Haxel, 1990). Tectonic structures recording the Laramide orogeny are more clearly dated from northwestern Sonora, where Iriondo et al (2005) dated white micas developed in thrust faults affecting plutons of Late Cretaceous age.…”

Section: Laramide Plutonismmentioning

confidence: 99%

“…Tectonic structures recording the Laramide orogeny are more clearly dated from northwestern Sonora, where Iriondo et al (2005) dated white micas developed in thrust faults affecting plutons of Late Cretaceous age. Similarly, in south-central Arizona, ductile thrusting started in Late Cretaceous time and culminated about 60 to 58 Ma ago (Haxel et al, 1984). According to Haxel et al (1984), latest Cretaceous to early Tertiary metamorphic rocks in that region share common features of an orogenic event characterized by thin-skinned faulting and thickening in the upper crust, while the middle crust was traversed by deep-seated upthrust faults reaching amphibolite facies conditions with associated migmatization.…”

Section: Laramide Plutonismmentioning

confidence: 99%

Laramide to Miocene syn-extensional plutonism in the Puerta del Sol area, central Sonora, Mexico

González-Becuar¹,

Pérez-Segura²,

Vega-Granillo³

et al. 2017

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González-Becuar, E., Pérez-Segura, E., Vega-Granillo, R., Solari, L., González-León, C.M., Solé, J., López Martínez, M., 2017, Laramide to Miocene syn-extensional plutonism in the Puerta del Sol area, central Sonora, Mexico: Revista Mexicana de Ciencias Geológicas, v. 34, núm. 1, p. 45-61. ABSTRACTPlutonic rocks of the Puerta del Sol area, in central Sonora, represent the extension to the south of the El Jaralito batholith, and are part of the footwall of the Sierra Mazatán metamorphic core complex, whose low-angle detachment fault bounds the outcrops of plutonic rocks to the west. Plutons in the area record the magmatic evolution of the Laramide arc and the Oligo-Miocene syn-extensional plutonism in Sonora. The basement of the area is composed by the ca. 1.68 Ga El Palofierral orthogneiss that is part of the Caborca block. The Laramide plutons include the El Gato diorite (71.29 ± 0.45 Ma, U-Pb), the El Pajarito granite (67.9 ± 0.43 Ma, U-Pb), and the Puerta del Sol granodiorite (49.1 ± 0.46 Ma, U-Pb). The younger El Oquimonis granite (41.78 ± 0.32 Ma, U-Pb) is considered part of the scarce magmatism that in Sonora records a transition to the Sierra Madre Occidental magmatic event. The syn-extensional plutons are the El Garambullo gabbro (19.83 ± 0.18 Ma, U-Pb) and the Las Mayitas granodiorite (19.2 ± 1.2 Ma, K-Ar). A migmatitic event that affected the El Palofierral orthogneiss, El Gato diorite, and El Pajarito granite between ca. 68 and 59 Ma might be related to the emplacement of the El Pajarito granite. The plutons are metaluminous to slightly peraluminous, with the exception of El Oquimonis granite, which is a peraluminous twomica, garnet-bearing granite. They are mostly high-K calc-alkaline with nearly uniform chondrite-normalized REE and primitivemantle normalized multielemental patterns that are characteristic of continental margin arcs and resemble patterns reported for other Laramide granites of Sonora. The Laramide and syn-extensional plutons also have Sr, Nd and Pb isotopic ratios that plot within the fields reported for Laramide granites emplaced in the Caborca terrane in northwestern and central Sonora. Nevertheless, and despite their geochemical affinity to continental magmatic arcs, the El Garambullo gabbro and Las Mayitas granodiorite are syn-extensional plutons that were emplaced at ca. 20 Ma during development of the Sierra Mazatán metamorphic core complex. The 40 Ar/ 39 Ar and K-Ar ages obtained for the El Palofierral orthogneiss, the Puerta del Sol granodiorite, the El Oquimonis granite, and the El Garambullo gabbro range from 26.3 ± 0.6 to 17.4 ± 1.0 Ma and are considered cooling ages associated with the exhumation of the metamorphic core complex.Key words: Laramide magmatism; syn-extensional plutonism; geochronology; geochemistry; Sr-Nd-Pb isotopes; Sonora; Mexico. Gato (71.29 ± 0.45 Ma, el granito El Pajarito (67.9 ± 0.43 Ma, RESUMEN

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“…Exhumation of mcc's and magmatism are broadly contemporaneous in many extensional settings (e.g., Baldwin et al, 1993;Coney, 1980;Coney and Harms, 1984;Crittenden et al, 1980;Fornash et al, 2013;Foster and Fanning, 1997;Gans et al, 1989;Haxel et al, 1984;Jolivet et al, 1998;Lister and Davis, 1989;Spencer and Reynolds, 1990). The detachment faults of core complexes generally root into the middle crust, while plutonic or volcanic magmas associated with faulting may be derived either from the lower crust or from the mantle.…”

Section: Introductionmentioning

confidence: 97%

Evolving magma sources during continental lithospheric extension: Insights from the Liaonan metamorphic core complex, eastern North China craton

Liu

et al. 2015

Tectonophysics

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Latest Cretaceous and early Tertiary orogenesis in south-central Arizona: Thrust faulting, regional metamorphism, and granitic plutonism

Cited by 75 publications

References 0 publications

Structural and tectonic evolution of Mesozoic basement-involved fold nappes and thrust faults in the Dome Rock Mountains, Arizona

Structural and tectonic evolution of Mesozoic basement-involved fold nappes and thrust faults in the Dome Rock Mountains, Arizona

Laramide to Miocene syn-extensional plutonism in the Puerta del Sol area, central Sonora, Mexico

Evolving magma sources during continental lithospheric extension: Insights from the Liaonan metamorphic core complex, eastern North China craton

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