Age, composition and tectonic implications of late Ordovician-early Silurian igneous rocks of the Loel Volcanic Belt, NW Laos

2019 ◽  
Vol 61 (15) ◽  
pp. 1940-1956 ◽  
Author(s):  
Yongzhen Long ◽  
Dexian Zhang ◽  
Dezhi Huang ◽  
Xiaoyong Yang ◽  
Shanshan Chen ◽  
...  
Keyword(s):  
Volcanic Belt ◽  
Late Ordovician ◽  
Igneous Rocks ◽  
Age Composition ◽  
Tectonic Implications

scholarly journals PRELIMINARY RESULTS OF PALAEOMA GNETIC MEASUREMENTS OF TERTIARY-QUATERNARY IGNEOUS ROCKS FROM THE EASTERN PART OF THE TRANS MEXICAN VOLCANIC BELT

1981 ◽  
Vol 20 (3) ◽  
Author(s):  
H. Bohnel ◽  
J. F. W. Negendank
Keyword(s):  
Volcanic Belt ◽  
Igneous Rocks ◽  
Preliminary Results ◽  
Mexican Volcanic Belt ◽  
Trans Mexican Volcanic Belt

Resultados paleomagnéticos de aproximadamente 500 muestras orientadas colectadas en 59 sitios de la sección este del eje volcánico trans-Mexicano se presentan en este trabajo. Las rocas ígeneas estudiadas son del Plioceno y Cuaternario, con la excepción del macizo de Palma Sola, de edad Mioceno. Los resultados paleomagnéticos se usan para correlacionar con resultados geoquímicos y geológicos del área y con resultados paleomagnéticos de Norteamérica y México. Los resultados no indican moviemiento relativo significante entre Norteamérica y la sección central-este de México en el período estudiado.

Geochemistry of Siluro-Devonian Tobique volcanic belt in northern and central New Brunswick (Canada): tectonic implications

1989 ◽  
Vol 26 (6) ◽  
pp. 1282-1296 ◽  
Author(s):  
J. Dostal ◽  
R. A. Wilson ◽  
J. D. Keppie
Keyword(s):  
New Brunswick ◽  
Mantle Source ◽  
Upper Mantle ◽  
Volcanic Rocks ◽  
Volcanic Belt ◽  
Continental Rift ◽  
Basaltic Rocks ◽  
Incompatible Elements ◽  
Tectonic Implications

Siluro-Devonian volcanic rocks of the northwestern mainland Appalachians are found mainly in the Tobique belt of New Brunswick where they consist predominantly of bimodal mafic–felsic suites erupted in a continental-rift environment. The axis of the Tobique rift trends north-northeast – south-southwest, obliquely to the regional northeast–southwest trend of the Appalachians. These geometric relationships are interpreted as being the result of rifting in a sinistral shear regime produced during emplacement of the Avalon terrene. The basaltic rocks are continental tholeiites and transitional basalts derived from a heterogeneous upper-mantle source that was enriched in incompatible elements relative to the primordial mantle. The mantle source was probably affected by the subduction processes.

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