Felsic magma commonly pools within shallow mushroom-shaped magmatic intrusions, so-called laccoliths or cryptodomes, which can cause both explosive eruptions and collapse of the volcanic edifice. Deformation during laccolith emplacement is primarily considered to occur in host rock. However, shallowly emplaced (cryptodomes) show extensive internal deformation. While deformation conduits an important process for regulating eruptive behavior, effects on intrusion remain largely unexplored. In...

Hydrothermal alteration and geofluid transport in magmatic systems plays a crucial role the development of ore deposits, systematics geothermal resources structural stability volcanic edifices. Characterising type, intensity distribution associated with pathways is therefore critical to understanding how essential form. However, routinely classified on basis highly subjective evaluations made by individual geologists or single semi-quantitative datasets such as hyperspectral core analysis....

Mechanisms responsible for igneous layering and the concentration of critical minerals within alkaline intrusions remain debated. The Ilímaussaq complex, South Greenland, is a layered intrusion containing economically important rare earth element (REE) deposits. Based on geochemical petrological data, two leading hypotheses formation at are: (1) repeated magma recharge in situ nucleation minerals; or (2) gravitational settling crystal mats closed magmatic system. We provide novel field, rock...

Abstract The 2014–2015 Holuhraun eruption on Iceland was located within the Askja fissure swarm but accompanied by caldera subsidence in Bárðarbunga central volcano 45 km to southwest. Geophysical monitoring of identified a seismic that migrated from site over course two weeks. In order better understand this lateral connection between and Holuhraun, we present mineral textures compositions, mineral‐melt‐equilibrium calculations, whole rock trace element data, oxygen isotope ratios for...

Abstract Cryptodome and dome collapse is associated with volcanic hazards, such as explosive eruptions, pyroclastic density currents, edifice collapse. The study of the growth evolution domes provides vital information on link between development weakness zones that may cause Cerro Bayo cryptodome superbly exposed in eroded Miocene Chachahuén volcano Neuquén basin, Argentina. a >0.3‐km 3 trachyandesitic intruded within uppermost kilometer volcano. Here we investigate emplacement using...

We investigate the global boundedness of Fourier integral operators with amplitudes in general Hörmander classes Sρ,δm(Rn), ρ,δ∈[0,1] and non-degenerate phase functions arbitrary rank κ∈{0,1,…,n−1} on Besov-Lipschitz Bp,qs(Rn) Triebel-Lizorkin Fp,qs(Rn) order s 0<p≤∞, 0<q≤∞. The results that are obtained all up to end-point sharp also applied regularity Klein-Gordon-type oscillatory integrals aforementioned function spaces.

Understanding magma transport in sheet intrusions is crucial to interpreting volcanic unrest. Studies of dyke emplacement and geometry focus predominantly on low-viscosity, mafic dykes. Here, we present an in-depth study two high-viscosity dykes (106 Pa·s) the Chachahuén volcano, Argentina, Great Dyke Sosa Dyke. To quantify geometries, flow indicators, viscosity, combine photogrammetry, microstructural analysis, igneous petrology, Fourier-Transform-Infrared-Spectroscopy, Anisotropy Magnetic...

Abstract Granitic magma bodies form in the ephemeral part of mush systems and are emplaced by a variety mechanisms different tectonic settings. This study investigates how granitic emplacement processes tectonomagmatic interactions assert control over architecture state pluton‐scale transport pathways. The 1.45 Ga shallow‐crustal Götemar pluton is 4.5 km diameter circular that consists three granite units: coarse‐grained red granite, medium‐grained pale to fine‐grained microgranite sheets....

Abstract How the Earth’s crust accommodates magma emplacement influences signals that can be detected by monitoring volcano seismicity and surface deformation, which are routinely used to forecast volcanic eruptions. However, we lack direct observational links between deformation caused signals. Here use field mapping photogrammetry quantify of at least 2.5 km 3 silicic in Reyðarártindur pluton, Southeast Iceland. Our results show triggered minor local roof uplift, reservoir growth was...

Abstract Anisotropy of magnetic susceptibility (AMS) and anisotropy remanence (AARM AIRM) are efficient versatile techniques to indirectly determine rock fabrics. Yet, deciphering the source a fabric remains crucial challenging step, notably in presence ferrimagnetic phases. Here we use X‐ray micro‐computed tomography directly compare mineral shape‐preferred orientation spatial distribution fabrics AMS, AARM AIRM from five hypabyssal trachyandesite samples. Magnetite grains euhedral with...

Abstract The Mourne Mountains magmatic center in Northern Ireland consists of five successively intruded granites emplaced the upper crust. granite pluton has classically been viewed as a type locality magma body by cauldron subsidence. Cauldron subsidence makes space for through emplacement ring dikes and floor However, were more recently re-interpreted laccoliths bysmaliths. Laccolith intrusions form inflation dome their host rock. Here we perform detailed study deformation rock to order...

Abstract Although it is widely accepted that shallow silicic magma reservoirs exist, and can feed eruptions, their dynamics longevity are a topic of debate. Here, we use field mapping, geochemistry, 3D pluton reconstruction thermal model to investigate the assembly eruptive history Reyðarártindur Pluton, southeast Iceland. Primarily, exposed constructed single rock unit, Main Granite (69.9–77.7 wt.% SiO 2 ). Two further units locally as enclaves at base exposure, Enclaves (67.4–70.2 ),...

Abstract Large-volume pyroclastic eruptions are not known from the basalt-dominated British Palaeogene Igneous Province (BPIP), although silicic magmatism is documented intra-caldera successions in central volcanoes and small-volume ash-layers associated lava fields. Exceptions Sgùrr of Eigg (58.7 Ma) Òigh-sgeir pitchstones Inner Hebrides (&gt;30 km apart), which have been conjectured to represent remnants a single large event. Currently available major element data these outcrops differ,...

Abstract The Palaeogene layered ultrabasic intrusion of the Isle Rum forms hearth Igneous Centre in NW-Scotland. regional Long Loch Fault, which is widely held to represent feeder system magma reservoir, dissects and marked by extensive breccias various types. Here we explore connection between cumulate rocks central that characterize fault zone (the ‘Central Series’) evaluate their relationship with Fault system. We show splays Central Series define a transtensional graben above into...

Abstract The Loch Bà ring-dyke and the associated Centre 3 granites represent main events of final phase activity at Palaeogene Mull igneous complex. is one best exposed ring-intrusions in world records intense interaction between rhyolitic basaltic magma. To reconstruct evolutionary history magmas, we present new major- trace-element, Sr isotope data as well first Nd Pb for felsic mafic components intrusion granites. We also report Sr, various crustal compositions from region, including...

Abstract In this paper, we prove bilinear sparse domination bounds for a wide class of Fourier integral operators general rank, as well oscillatory associated to Hörmander symbol classes $$S^m_{\rho ,\delta }$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>S</mml:mi> <mml:mrow> <mml:mi>ρ</mml:mi> <mml:mo>,</mml:mo> <mml:mi>δ</mml:mi> </mml:mrow> <mml:mi>m</mml:mi> </mml:msubsup> </mml:math> all $$0\le \rho \le 1$$ <mml:mn>0</mml:mn> <mml:mo>≤</mml:mo>...

Volcanic and magmatic outgassing mechanisms can determine eruptive behavior of shallow silicic magma bodies. Most proposed take place along conduit margins, where highest strain rates drive ascending to brittle failure. However, these do not account for large volumes away from the walls. Here, we present a continuum porosity preserved in microcrystalline rhyolitic Sandfell laccolith, Eastern Iceland. Three stages are described: porous flow bands, pore channels, fracture bands. These...

Abstract Mineral fabrics within igneous intrusions can archive both tectonic and magmatic processes. However, whether state reflect primary processes or regional strain is often ambiguous. To investigate when are formed, one compare the mineral to features, such as interface between solidified magmas in mingling zones. The monzodioritic Fanad pluton shows a NNE-SSW–aligned petrofabric parallel strike of nearby shear zone, with dioritic enclaves aligned oblique this petrofabric. We therefore...