Results 81 to 90 of about 571,249 (212)

Numerical simulations of the mingling caused by a magma intruding a resident mush

Volcanica
Currently, our ability to interpret the mechanics of magma mingling and mixing is limited by an incomplete understanding of the modes of mixing across all melt fractions and compositions.
Alexandre Carrara, Alain Burgisser, George W. Bergantz   +2 more
doaj   +1 more source

Dynamics of Magma Recharge and Mixing at Mount Hood Volcano, Oregon -- Insights from Enclave-bearing Lavas [PDF]

, 2018
Magma recharge events and subsequent mixing processes are understood to precede volcanic eruptions. Textural evidence of intrusion of hot, mafic magma into a cooler, rheologically locked silicic magma is commonplace. Solidified blobs of injected magma,
Ellowitz, Molly Kathryn
core   +1 more source

Deciphering magma-mixing processes using zoned titanite from the Ross of Mull granite, Scotland

, 2010
A textural and geochemical investigation of titanite from the Ross of Mull Granite, Scotland, reveals that zoning in trace elements strongly correlates with field evidence of magma-mixing processes within the pluton.
Tim J. Dempster, Faithfull, J.W., Graham W. Mcleody, John W. Faithfull, Graham W. McLeod, Dempster, T.J., McLeod, G.W.   +6 more
core   +1 more source

TIMS Techniques for Measuring Strontium Isotope Ratios in Apatite Grains and Application to Igneous Rock Petrology

Rapid Communications in Mass Spectrometry, Volume 41, Issue 1, 15 January 2027.
ABSTRACT Rationale This study evaluates the potential of Sr isotopic compositions in apatite grains from magmatic rocks as a proxy for initial 87Sr/86Sr ratios, addressing the need for alternative approaches to conventional whole‐rock analyses in isotopic studies of granitoid systems.
Carla Neto, Claudio de Morisson Valeriano, Gabriel Paravidini, Henrique Bruno, Manuela Carvalho, Rasec Almeida, Caroline Peixoto, Samuel Bersan, Mariana Carvalho, Monica Heilbron   +9 more
wiley   +1 more source

Quantitative Analysis of Mineral Textures in the Mapeng Pluton (Central Taihang Mountains) and Its Implications for Magmatic Processes

Crystals
The Mapeng pluton in the central Taihang Mountains hosts significant gold mineralization; however, the magmatic processes controlling its emplacement, crystallization, and potential role in ore genesis remain debated.
Hui Rong, Jingyi Huang, Siyu Zhu, Wentan Xu, Zhenzhen Li, Zihan Yu   +5 more
doaj   +1 more source

Timescales of magma mixing and magma recharge

, 2011
Die Vorgänge in komplexen magmatsichen \(\it plumbing\) Systemen zu verstehen, ist eine der wesentlichen Aufgaben der modernen Vulkanologie. In dieser Arbeit wurde ein Methode entwickelt und getestet, die es ermöglicht chemische Zonierungen in magmatischen Mineralen (Olivin) zu benutzen, um die Aufstiegspfade und die Interaktionen chemisch ...
openaire   +1 more source

Late Pliocene–Quaternary Arc Volcanism at the Southern Limit of the Hikurangi Subduction Zone: Revised Chronology of the Taranaki Peninsula, New Zealand

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 4, December 2026.
Igneous centres across the Taranaki Peninsula represent the southwestern limit of arc volcanism associated with the Tonga–Kermadec–Hikurangi subduction system. Taranaki Maunga, the youngest and largest of three andesitic stratovolcanoes, dominates the geomorphology of the Taranaki Peninsula along with the eroded remnants of the Kaitake and Pouakai ...
G. P. Thrasher, M. W. Sagar, H. Seebeck, G. P. D. Viskovic   +3 more
wiley   +1 more source

Estimating Sub‐Pixel Temperatures During Volcanic Eruptions Using Dual‐Band Thermal Imaging Technique: Case Studies From Whakaari/White Island (New Zealand) and Tofua (Tonga)

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 4, December 2026.
This study presents the first application of a dual‐band satellite thermal monitoring technique in New Zealand and Tonga, using the 2019 eruption of Whakaari/White Island and the persistently active Lofia crater on Tofua volcano as case studies. At Whakaari/White Island, near‐synchronous Landsat‐8 and Sentinel‐2A data (16 min interval) were analysed ...
Salman Ashraf, Geoff Kilgour, Jenny Black, Muhammad Aufaristama   +3 more
wiley   +1 more source

Variations in dv/v Susceptibility to Earthquake Shaking Along the Alaska Subduction Zone

Geophysical Research Letters, Volume 53, Issue 21, 16 November 2026.
Abstract Earthquake‐triggered decreases in relative seismic velocity (dv/v) of the crust have been reported for many events, but regional variations in dv/v susceptibility to shaking are not well understood. Here, 14 Alaskan earthquakes with Mw 6.8–8.2 are consistently analyzed with single‐station coda‐wave interferometry.
Thomas J. Lee, Brandon Schmandt
wiley   +1 more source

Permian sedimentary sequence containing analcimolite and authigenic aegirine from the Boskovice Basin (Bohemian Massif, Czechia)

The Depositional Record, Volume 12, Issue 5, November 2026.
The Permian freshwater lacustrine sedimentary sequence rich in analcime, with unusual authigenic aegirine and NaFe3+ clinopyroxene. Product of ashfall directly linked with fossil accumulation (Konzentrat‐Lagerstätte). Abstract The Early Permian freshwater lacustrine sedimentary sequence in the vicinity of Bačov (Czechia) is world‐famous for its rich ...
Jakub Jirásek, Dalibor Matýsek, Martin Kašing, Daniel Šimíček   +3 more
wiley   +1 more source