نتایج جستجو برای: lineation

تعداد نتایج: 125  

Journal: :Frontiers in Earth Science 2023

Ridge jumps occurred during the spreading process of South China Sea. Recent research on lower crustal reflectors event seismic profiles found at least two southward ridge jumps, but only one has been confirmed by geomagnetic data. Based magnetic anomalies in northern Sea and “two jumps” model, this study identified that an early jump anomaly C10n (28.3 Ma), with a 20 km. According to lineation...

Journal: :Bulletin De La Societe Geologique De France 2022

A petro-structural and geochronological study has been conducted in the Agly Variscan Massif located Northern Pyrenean Zone (France). The Lower Gneiss Unit (LGU) displays highly ductile deformation with a NNE-SSW oriented stretching lineation opposite senses of shear directions top-to-the-NNE top-to-the-SSW. Field observations thin section analysis show that these two are coeval bulk coaxial ve...

Journal: :Frontiers in Earth Science 2023

The purpose of this research is to delineate the structures Lower Goru Formation, investigate fluid properties, and clarify hydrocarbon-prone areas through seismic attributes analysis. First, acquired data was matched by interpretation datum. Structural analysis done performing horizon interpretation, fault contour mapping on C-Interval Formation. Hydrocarbon zones were marked with help attribu...

Journal: : 2021

The article presents geomorphological and structural evidences of post-thrust limestone brittle deformation in the area Pavlov Hills on westernmost margin Outer Western Carpathians, Czech Republic. Airborne LiDAR-derived digital terrain model with 1 m resolution was used for this analysis, as well aerial photographs fieldwork. Combining these methods, we document a distinct N-S directed fault z...

Journal: :Geochemistry Geophysics Geosystems 2021

The geological record of deep fossil seismogenesis in subduction zones is limited due to common rock overprinting during exhumation and only a few regions expose well-preserved deeply exhumed structures. We investigated mesoscopic contractional duplex formed at blueschist facies conditions continental metasediments the Northern Apennines (Italy). Field observations reveal strain partitioning wi...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان 1387

چکیده ندارد.

2001
GEMA RIBEIRO OLIVO MICHEL GAUTHIER ANTHONY E. WILLIAMS-JONES MARTIN LEVESQUE

The Conceição mine, which is located in the Itabira district, southern São Francisco craton, is a rare example of gold and palladium mineralization hosted by jacutinga, an altered Lake Superior-type iron-formation. The mine sequence consists of three metamorphosed lithostratigraphic units, which are from the oldest to the youngest: (1) an Archean volcanosedimentary sequence, (2) a Paleoproteroz...

Journal: :Earth Surface Processes and Landforms 2023

Palaeo-ice sheets leave behind a rich database regarding their past behaviour, recorded in the landscape form of glacial geomorphology. The most numerous landform created by these ice are subglacial lineations, which generate snapshots direction flow at fixed (yet typically unknown) points time. Despite relative density within record, information provided lineations is currently underutilised t...

2007
Andrea Viezzoli Anders V. Christiansen Esben Auken Kurt Sørensen

Airborne electromagnetic (AEM) surveys carried out around the globe produce thousands of km of data every year. Because of the enormous computational costs involved in a full 3D inversion, these data are usually inverted using a 1D forward model. The 1D model assumption is legitimate in quasi layered sedimentary areas. In some cases the output models are simply stitched together (Auken et al., ...

2010
Mickael Bonnin Guilhem Barruol Götz H. R. Bokelmann

[1] In order to constrain the vertical and lateral extent of deformation and the interactions between lithosphere and asthenosphere in a context of a transpressional plate boundary, we performed teleseismic shear wave splitting measurements for 65 permanent and temporary broadband stations in central California. We present evidence for the presence of two anisotropic domains: (1) one with clear...

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