نتایج جستجو برای: orogenic belt

تعداد نتایج: 18517  

2000
D. J. Clark B. J. Hensen

Based on structural, petrographic and geochronological work (SHRIMP zircon, monazite and rutile), the Mesoproterozoic Albany–Fraser Orogeny is divided into two discrete thermo-tectonic stages, between c. 1345 and 1260 Ma (Stage I) and c. 1214 and 1140 Ma (Stage II). The existence of a two-stage history is confirmed by the discovery of 1321924 Ma detrital zircons and 1154915 Ma metamorphic rutil...

2007
H. DURAN

In the Catalonian Coastal Ranges, Paleozoic sedimentary and meta-sedimentary rocks crop out in severa1 areas, intruded by late tectonic Hercynian granitoids and separated by Mesozoic and Tertiary cover sediments. Large structures are often difficult to recognize, although a general east-west trend can be observed on the geological map. Deformation was accompanied by the development of cleavages...

2009
William R. Griffin Kenneth A. Foland Robert J. Stern Matthew I. Leybourne

Small-volume Late Cretaceous monogenetic alkaline volcanism along the southern margin of North America resulted in a broad igneous belt more than 1200 km long from the Trans Pecos region of west Texas to central Mississippi, collectively forming a northern Gulf of Mexico magmatic zone (NGMMZ). The locus of igneous activity is associated with the discontinuity separating Mesoproterozoic cratonic...

2014
BRIAN K. HORTON

s (underlined = graduate student; * = postdoctoral scholar) [128] Anderson, R.B., Long, S.P., Horton, B.K., Calle, A., and Stockli, D.F., 2014, New apatite and zircon (UTh)/He constraints on the timing of thrust-related exhumation in the southern Bolivian (21 ̊S) Andes: AGU Fall Meeting. [127] Barber, D., Stockli, D.F., Koshnaw, R.I., Horton, B.K., and Kendall, J.J., 2014, Detrital zircon U-Pb a...

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