نتایج جستجو برای: orogenic

تعداد نتایج: 1668  

2015
James B. Chapman Peter G. DeCelles

The link between orogenic activity and foreland basin stratigraphy is well established; however, potential controls by foreland basin stratigraphy on thrust belt architecture have not been fully evaluated. Mechanical properties of typical foreland basin stratigraphic successions influence the structural development of fold-thrust belts in predictable ways. Fundamental features of foreland basin...

Journal: :Proceedings of the National Academy of Sciences 2007

2012
Ashley K. Russell Kouki Kitajima Ariel Strickland Daniel J. Schulze John W. Valley

In situ analysis reveals that eclogite-facies garnets are zoned in dO with lower values in the core and rims that are *1.5 to 2.5 % higher. This pattern is present in 9 out of 12 garnets analyzed by SIMS from four orogenic eclogite terranes, and correlates with an increase in the mole fraction of pyrope and Mg/Fe ratio from core to rim, indicating prograde garnet growth. At the maximum temperat...

1999
Mihai Ducea

Drăguşanu and Tanaka (1999) provide intriguing new chemical and isotopic analyses of amphibolites and gneisses from the Cumpăna Group, the oldest lithostratigraphic unit in the Getic-Supragetic unit of the South Carpathians (Balintoni 1975; Pana 1994). Ten amphibolite whole-rock data points form a linear trend in a plot of measured Nd/Nd against Sm/Nd (Drăguşanu and Tanaka 1999, fig. 3). Drăguş...

Journal: :The Journal of geology 1999
Ducea

Drăguşanu and Tanaka (1999) provide intriguing new chemical and isotopic analyses of amphibolites and gneisses from the Cumpăna Group, the oldest lithostratigraphic unit in the Getic-Supragetic unit of the South Carpathians (Balintoni 1975; Pana 1994). Ten amphibolite whole-rock data points form a linear trend in a plot of measured Nd/Nd against Sm/Nd (Drăguşanu and Tanaka 1999, fig. 3). Drăguş...

Journal: :Mining science and technology 2018

2004
JAMES W. SEARS PETER C. RYAN

Paleovalleys are components of regional unconformities that provide important constraints on the tectonic evolution of orogenic systems. Some paleovalleys represent canyons cut through deformed strata. Others comprise linear rift-valleys filled with lakes, streams, or alluvium. Locally preserved fluvial and alluvial gravel may directly link source regions to depositional basins, providing timel...

Journal: :Molecular phylogenetics and evolution 2004
Tomas Hrbek Kai N Stölting Fevzi Bardakci Fahrettin Küçük Rudolf H Wildekamp Axel Meyer

We investigated the phylogenetic relationships of Pseudophoxinus (Cyprinidae: Leuciscinae) species from central Anatolia, Turkey to test the hypothesis of geographic speciation driven by early Pliocene orogenic events. We analyzed 1141 aligned base pairs of the complete cytochrome b mitochondrial gene. Phylogenetic relationships reconstructed by maximum likelihood, Bayesian likelihood, and maxi...

2008
T. Hashino

This study investigates the microphysical sensitivity of an orogenic thunderstorm during Genoa 1992 flood event to the concentration and solubility of nucleating aerosols. Idealized 2-D simulations with a new microphysical scheme and a cloud resolving model showed the solubility of CCN can be as important as their concentration. High solubility cases of CCN led to less accumulation of precipita...

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