نتایج جستجو برای: emplacement mechanism

تعداد نتایج: 567112  

مهری, محمد, سفیدگر, آرام , سفیدگر, آرزو , موید, محسن , نعمتی , فرنود,

Misho granitoid pluton is exposed at the North Western part of the Misho Mountains and at the South Western part of the Marand compresional depression. The minerals in the rocks of this pluton include unhedral to sub – hedral quartz, K – feldspar both as microcline with tartan twinning and  sub - hedral to unhedral orthoclase, two generations of biotite and zircon, subhedral to euhedral plagioc...

مفیدی, الهه, یساقی, علی , رحیمی, بهنام,

In this study, strain and microstructures of quartz grains have been used for deformational analysis of thrust sheets in the eastern Alborz. Structural studies resulted in recognition of eight thrust sheets (Gorgan, Siahkhani, Tazereh, Shahdar, Anbankuh, Shirband, Anjirlu and Sefidkuh) in ascending order from north to south. Microstructural studies and strain analyses on samples across the shee...

2009
J. D. L. WHITE S. E. BRYAN

Large igneous provinces (LIPs) form in both oceanic and continental settings by the emplacement and eruption of voluminous magmas ranging from basalt to rhyolite in composition. Continental flood basalt provinces are the best studied LIPs and consist of crustal intrusive systems, extensive flood lavas and ignimbrites, and mafic volcaniclastic deposits in varying proportions. Intrusive rocks are...

Journal: :Geophysical Research Letters 2021

Individual lava flows in flood basalt provinces are composed of sheet pāhoehoe lobes and the 10–100 m thick thought to form by inflation. Quantifying emplacement history these can help infer magnitude temporal dynamics prehistoric eruptions. Here we use a phase-field model describe solidification remelting sequentially emplaced explore additional processes that may lead lobes. We calibrate para...

2002
K.

Major systems of northwesterly, northerly, and northeasterly trending recurrilig fractures or faults controlled emplacement of various units of the Iron Mask batholith. The batholith was emplaced in a high level volcanic to subvolcanic environment, comagmatic with Nicola volcanic rocks and coeval with part of the upper Nicola succession. The batholith intruded volcanic and sedimentary rocks of ...

Journal: :Journal of Maps 2021

In this work, we present new Bouguer and residual anomaly maps of the Central Pyrenees calculated from 3590 stations, which 1141 are observations acquired surveys performed between 2018 2019. The most prominent feature is long wavelength elongated minimum in its central part that continues to W ends towards E with a positive gradient seems envelope minimum. Other short medium minima superimpose...

Journal: :Frontiers in Earth Science 2021

Dikes feed most eruptions, so understanding their mechanism of propagation is fundamental for volcanic hazard assessment. The variation in geometry a propagating dike as function the injection rate remains poorly studied. Here we use experiments injecting water into gelatin to investigate thickness, width and length flux-driven connected its source time intruded volume. Results show that thickn...

Journal: :Geochemistry, Geophysics, Geosystems 2015

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