Results 81 to 90 of about 13,576 (317)
On the effect of a two-rocks boundary on the propagation of nonlinear transients of temperature and pressure in deformable porous rocks [PDF]
arXiv, 2016 We here analyze the propagation of transients of fluid-rock temperature and pressure through a thin boundary layer, where a steady trend is present, between two adjacent homogeneous rocks. We focus on the effect of convection on transients crossing such thin layer.
arxiv
Ultramafic talc-carbonate unit -- The North Pole Dome and Dresser Formation [PDF]
arXiv, 2020 Here we describe the ultramafic talc-carbonate unit of the North Pole Dome. The North Pole Dome (NPD) is located in the centre of the East Pilbara Terrane (Van Kranendonk et al., 2007). The NPD is a structural dome of bedded, dominantly mafic volcanic rocks of the Warrawoona and Kelly Groups that dip gently away from the North Pole Monzogranite exposed
arxiv
地质科技通报Objective To clarify the oil and gas accumulation patterns and main controlling factors of the thin weathered crust volcanic rock reservoir at the top of Member 2 of the Fengcheng Formation in the southern Mahu Sag(Manan Sag). Methods This paper provides
Xincai YOU +9 more
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A toy model for approaching volcanic plumbing systems as complex systems [PDF]
French Regional Conference on Complex systems 2023 (FRCCS2023), Le
Havre, France, 2023 Magmas form at depth, move upwards and evolve chemically through a combination of processes. Magmatic processes are investigated by means of fieldwork combined with geophysics, geochemistry, analog and numerical models, and many other approaches. However, scientists in the field still struggle to understand how the variety of magmatic products arises ...
arxiv
VII.—Mesozoic Volcanic Rocks of British Columbia and Chile. Relation of Volcanic and Metamorphic Rocks [PDF]
Geological Magazine, 1877 In Chile and adjacent regions of South America, Mr. Darwin, in his “Geological Observations,” has described a great series of Mesozoic rocks, which he calls the “porphyritic formation,” and which shows an interesting resemblance to certain rocks in British Columbia.
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Indonesian Journal on Geoscience, 2014 http://dx.doi.org/10.17014/ijog.vol4no2.20091The Semilir Formation was typically originated from products of a very explosive volcanic activity, i.e. breccias, lapillistones, and tuffs containing abundant pumice.
Sutikno Bronto +3 more
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Exponential Decay Of Concentration Variance During Magma Mixing: Robustness Of A Volcanic Chronometer And Implications For The Homogenization Of Chemical Heterogeneities In Magmatic Systems [PDF]
, 2017 The mixing of magmas is a fundamental process in the Earth system causing extreme compositional variations in igneous rocks. This process can develop with different intensities both in space and time, making the interpretation of compositional patterns in igneous rocks a petrological challenge.
arxiv +1 more source
The Anatomical Record, EarlyView.Abstract This article reviews the pathological changes in the enamel of permanent mandibular cheek teeth and their sequelae in European roe deer from regions polluted by anthropogenic fluoride emissions. The primary (developmental) changes of fluorotic roe deer enamel are hypomineralization and microstructural aberrations, including enamel hypoplasia ...
Uwe Kierdorf, Horst Kierdorf
wiley +1 more source
Remote Sensing in Ecology and Conservation, Volume 8, Issue 6, Page 808-826, December 2022., 2022 The Ngorongoro Conservation Area (NCA), a UNESCO World Heritage Site, is globally important for biodiversity conservation due to the presence of iconic megafauna. For decades now, the NCA is experiencing a number of notoriously difficult to address challenges; understanding its land cover dynamics is therefore increasingly important to improve habitat ...
Joana Borges +8 more
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Geochemistry of volcanic rocks
, 2007 This geochemical compilation contains 237 unpublished whole-rock geochemical analyses provided by S. Modeland (pers. comm., 2005) of mafic volcanic rocks and associated mafic intrusions from the Bravo Lake formation of the Piling group of central Baffin Island, Nunavut (Modeland and Francis, 2004).
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