scholarly journals Evolution of the Yiwulushan metamorphic core complex from distributed to localized deformation and its tectonic implications

Tectonics ◽  
2012 ◽  
Vol 31 (4) ◽  
pp. n/a-n/a ◽  
Author(s):  
Bilong Zhang ◽  
Guang Zhu ◽  
Dazhi Jiang ◽  
Changcheng Li ◽  
Yin Chen
Keyword(s):  
Metamorphic Core Complex ◽  
Localized Deformation ◽  
Core Complex ◽  
Tectonic Implications ◽  
Metamorphic Core

Genesis of the Hongzhen metamorphic core complex and its tectonic implications

2007 ◽  
Vol 50 (5) ◽  
pp. 649-659 ◽  
Author(s):  
Guang Zhu ◽  
ChengLong Xie ◽  
BiWei Xiang ◽  
ZhaoQi Hu ◽  
YongSheng Wang ◽  
...  
Keyword(s):  
Metamorphic Core Complex ◽  
Core Complex ◽  
Tectonic Implications ◽  
Metamorphic Core

scholarly journals The Nova Monte Verde metamorphic core complex: Tectonic implications for the southern Amazonian craton

2019 ◽  
Vol 91 ◽  
pp. 154-172 ◽  
Author(s):  
Gilmar José Rizzotto ◽  
Cléber Ladeira Alves ◽  
Francisco Sene Rios ◽  
Márcia Aparecida de Sant’Ana Barros
Keyword(s):  
Metamorphic Core Complex ◽  
Core Complex ◽  
Tectonic Implications ◽  
Amazonian Craton ◽  
Monte Verde ◽  
Metamorphic Core

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

2017 ◽  
Vol 34 (1) ◽  
pp. 45 ◽  
Author(s):  
Elizard González-Becuar ◽  
Efrén Pérez-Segura ◽  
Ricardo Vega-Granillo ◽  
Luigi Solari ◽  
Carlos Manuel González-León ◽  
...  
Keyword(s):  
Metamorphic Core Complex ◽  
Primitive Mantle ◽  
Isotopic Ratios ◽  
Magmatic Evolution ◽  
Calc Alkaline ◽  
Core Complex ◽  
High K ◽  
Sierra Madre ◽  
Plutonic Rocks ◽  
Metamorphic Core

Plutonic 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 two-mica, garnet-bearing granite. They are mostly high-K calc-alkaline with nearly uniform chondrite-normalized REE and primitive-mantle 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 40Ar/39Ar 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.

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