نتایج جستجو برای: orogenic belt
تعداد نتایج: 18517 فیلتر نتایج به سال:
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...
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...
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...
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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