Rocas Verdes ophiolites: Difference between revisions

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Sarmiento complex

Tortuga complex

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Location of selected outcrops of the Sarmiento and Tortuga complexes.

The Rocas Verdes ophiolites (Spanish: Complejo Ofiolítico de Rocas Verdes) are a series of greenschists and other rocks constituting ophiolites in Magallanes Region, southernmost Chile. The Rocas Verdes ophiolites represent the continental-oceanic crust that existed in a back-arc basin in the Mesozoic Era as result of extensional tectonics.^[1] This back-arc basin then evolved into the Magallanes foreland basin in the Cenozoic Era within the context of the wider Andean orogeny.^[1]

The main Rocas Verdes ophiolites are the Sarmiento and Tortuga complexes. Volcanic rocks in both complexes belong to the tholeiitic magma series. While neither represent true oceanic crust Tortugas complex has more geochemical affinity to oceanic crust.^[2]

References

^ ^a ^b Stern, Charles R.; De Wit, Maarten J. (2013). "Rocas Verdes ophiolites, southernmost South America: remnants of progressive stages of development of oceanic-type crust in a continental margin back-arc basin". In Dilek, Y.; Robinson, P.T. (eds.). Ophiolites in Earth History. Geological Society, London, Special Publications. pp. 665–683. CiteSeerX 10.1.1.1026.5572.
^ Stern, Charles (1979). "Open and closed system igneous fractionation within two chilean ophiolites and the tectonic implication". Contributions to Mineralogy and Petrology. 68 (3): 243–258. Bibcode:1979CoMP...68..243S. doi:10.1007/BF00371545. S2CID 128480031.

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[SternDeWit2013-1] Stern, Charles R.; De Wit, Maarten J. (2013). "Rocas Verdes ophiolites, southernmost South America: remnants of progressive stages of development of oceanic-type crust in a continental margin back-arc basin". In Dilek, Y.; Robinson, P.T. (eds.). Ophiolites in Earth History. Geological Society, London, Special Publications. pp. 665–683. CiteSeerX 10.1.1.1026.5572.

[2] Stern, Charles (1979). "Open and closed system igneous fractionation within two chilean ophiolites and the tectonic implication". Contributions to Mineralogy and Petrology. 68 (3): 243–258. Bibcode:1979CoMP...68..243S. doi:10.1007/BF00371545. S2CID 128480031.

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+{{Location map+|Chile|float=right|width=200|caption=Location of selected outcrops of the Sarmiento and Tortuga complexes.|places=
-The '''Rocas Verdes ophiolites''' are a series of [[greenschist]]s and other rocks forming constituting ophiolites in [[Magallanes Region]], southernmost Chile. The Rocas Verdes ophiolites represent the [[continental crust|continental]]-[[oceanic crust|oceanic]] crust that existed in the [[Magallanes Basin|Magallanes back-arc basin]] in the [[Mesozoic]].<ref>{{cite book |last=Stern |first=Charles R.|last2=De Wit |first2=Maarten J. |date=2013 |chapter=Rocas Verdes ophiolites, southernmost South America: remnants of progressive stages of development of oceanic-type crust in a continental margin back-arc basin |chapter-url=http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.1026.5572&rep=rep1&type=pdf|editor-last=Dilek|editor-first=Y.|editor-last2=Robinson |editor-first2=P.T.|title=Ophiolites in Earth History  |location= |publisher= |pages=665-683|series=Geological Society, London, Special Publications|issue=2018 |isbn= |author-link= }}</ref>
+<!-- North-East-->
+{{Location map~|Chile|lat=-50.651286 |long=-73.657067 |label=Sarmiento complex|position=left|mark=Green pog.svg}}
+{{Location map~|Chile|lat=-55.239742 |long=-67.812356 |label=Tortuga complex|position=top|mark=Green pog.svg}}
+}}
+The '''Rocas Verdes ophiolites''' ({{langx|es|Complejo Ofiolítico de Rocas Verdes}}) are a series of [[greenschist]]s and other rocks constituting [[ophiolite]]s in [[Magallanes Region]], southernmost Chile. The Rocas Verdes ophiolites represent the [[continental crust|continental]]-[[oceanic crust|oceanic]] crust that existed in a [[back-arc basin]] in the [[Mesozoic|Mesozoic Era]] as result of [[extensional tectonics]].<ref name=SternDeWit2013>{{cite book |last1=Stern |first1=Charles R.|last2=De Wit |first2=Maarten J. |date=2013 |chapter=Rocas Verdes ophiolites, southernmost South America: remnants of progressive stages of development of oceanic-type crust in a continental margin back-arc basin |editor-last=Dilek|editor-first=Y.|editor-last2=Robinson |editor-first2=P.T.|title=Ophiolites in Earth History  |pages=665–683|series=Geological Society, London, Special Publications|issue=2018 |citeseerx=10.1.1.1026.5572}}</ref> This back-arc basin then evolved into the  [[Magallanes Basin|Magallanes foreland basin]] in the [[Cenozoic|Cenozoic Era]] within the context of the wider [[Andean orogeny]].<ref name=SternDeWit2013/>
+The main Rocas Verdes ophiolites are the Sarmiento and Tortuga [[Complex (geology)|complexes]]. [[Volcanic rock]]s in both complexes belong to the [[tholeiitic magma series]]. While neither represent true [[oceanic crust]] Tortugas complex has more [[geochemistry|geochemical]] affinity to oceanic crust.<ref>{{cite journal |last1=Stern |first1=Charles |date=1979 |title=Open and closed system igneous fractionation within two chilean ophiolites and the tectonic implication |journal=[[Contributions to Mineralogy and Petrology]] |volume=68 |issue=3 |pages=243–258 |doi= 10.1007/BF00371545|bibcode=1979CoMP...68..243S |s2cid=128480031 }}</ref>
 ==References==
 {{reflist}}
-{{geology-stub}}
-[[Category:Geology of Magallanes y la Antártica Chilena Region]]
+[[Category:Cretaceous Chile]]
-[[Category:Natural history of Tierra del Fuego]]
+[[Category:Geology of Magallanes Region]]
+[[Category:Jurassic Chile]]
+[[Category:Geology of Tierra del Fuego]]
 [[Category:Ophiolites]]
+{{plate-tectonics-stub}}