نتایج جستجو برای: blueschist facies

تعداد نتایج: 5608  

2003
D. E. Shean

Introduction: Each of the three Tharsis Montes volcanoes on Mars has unusual fan-shaped deposits located exclusively to the northwest of each shield. The fan-shaped deposits of the Tharsis Montes generally share three major facies: 1) Ridged facies, 2) Knobby facies, and 3) Smooth facies. Here we examine the Pavonis fan-shaped deposits using new Mars Global Surveyor and Mars Odyssey data. Any e...

2001
S. J. Cuddy P.W.J. Glover

A 3D model of oil and gas fields is important for reserves estimation, for cost effective well placing and for input into reservoir simulators. Reservoir characterization of permeability, litho-facies and other properties of the rocks is essential. A good model depends on calibration at the well locations, with cored wells providing the best data. A subset of wells may contain specialized infor...

Journal: :Journal of Metamorphic Geology 2023

The Chenaillet Ophiolite represents a very well-preserved portion of Ligurian-Piedmont ocean in the Western Alps. It is formed from an oceanic lithospheric succession comprising exhumed mantle, various mafic intrusives (i.e., gabbro sensu lato), and world-renowned sequence pillow basalts. Apart scarce breccias closely related to lithosphere, no sedimentary cover exposed. Historically, has been ...

Journal: :Geoscience frontiers 2022

New field observations and petrological data from Early Cretaceous metamorphic rocks in the Central Cordillera of Colombian Andes allowed recognition thermally overprinted high-pressure derived oceanic crust protoliths. The obtained path suggests that evolved blueschist to eclogite facies towards upper amphibolite granulite transitional conditions. Eclogite conditions, better recorded mafic pro...

Journal: :The Medical journal of Malaysia 2003
S A Fadilah A A Alawiyah M A Latif Amir S K Cheong

Acute leukaemia may rarely present as diffuse papules, nodules and plaques forming leonine facies. Leukaemia cutis generally carries a poor prognosis, and responds less well to chemotherapy. We described a case of acute myelomonocytic leukaemia presenting as leonine facies as a result of extensive cutaneous infiltration. The patient did not achieve haematological remission following standard in...

Journal: :رخساره های رسوبی 0
مهدی رضا پورسلطانی مصطفی معینی صالح

no-bahar watershed is located, south of khorasan razavi province. geologically, the study area is a part of central iran zone. the rock units are late mesozoic and cenozoic in age in this watershed. no-babhar watershed includes several channels, which among them, only two main channels, motr-abad and solh-abad, have been studied. these rivers are mostly, braided channel in style, with high grad...

Journal: :CoRR 2017
Feng Qian Miao Yin Ming-Jun Su Yaojun Wang Guangmin Hu

Prestack seismic data carries much useful information that can help us find more complex atypical reservoirs. Therefore, we are increasingly inclined to use prestack seismic data for seismic facies recognition. However, due to the inclusion of excessive redundancy, effective feature extraction from prestack seismic data becomes critical. In this paper, we consider seismic facies recognition bas...

2017
James D. Schiffbauer John Warren Huntley David A. Fike Matthew Jarrell Jeffrey Jay M. Gregg Kevin L. Shelton

Several positive carbon isotope excursions in Lower Paleozoic rocks, including the prominent Upper Cambrian Steptoean Positive Carbon Isotope Excursion (SPICE), are thought to reflect intermittent perturbations in the hydrosphere-biosphere system. Models explaining these secular changes are abundant, but the synchronicity and regional variation of the isotope signals are not well understood. Ex...

2003
T. M. Demko

Deposition of marine strata associated with the Lower Pennsylvanian Mary Lee coal zone (Pottsville Formation) was controlled by the allocyclic mechanism of eustatic sea-level change. The vertical stacking of marine, marginal marine, and terrestrial facies indicates that this interval was deposited during a single transgression-regression-transgression cycle. Ravinement surfaces, and associated ...

2008
Brendt Wohlberg Daniel M. Tartakovsky

The ability to delineate geologic facies and to estimate their properties from sparse data is essential for modeling physical and biochemical processes occurring in the subsurface. If such data are poorly differentiated, this challenging task is complicated further by the absence of a clear distinction between different hydrofacies at locations where data are available. We consider three altern...

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