Results 41 to 50 of about 5,658 (224)

A new, ~4500‐year varve record and high‐resolution tephrochronology from lake Hämälänlampi, eastern Finland, provides age constraints for the Furnas C and the Glen Garry/Askja A‐2000 eruptions

Journal of Quaternary Science, EarlyView.
ABSTRACT The northern European distal cryptotephra framework is constantly developing both in terms of identification of new tephra horizons and improved age constraints for the already well‐established tephra marker horizons. However, many prehistoric tephra layers have only been dated by the radiocarbon method, with its inherent problems.
Maarit Kalliokoski, Veera Erola, Saija Saarni   +2 more
wiley   +1 more source

Seismolosical studies of magma injection processes: volcano monitoring and imaging of magma chambers [PDF]

, 2001
The processes associated with magma injection at shallow depths within the crust have been the topic of many geophysical studies, some investigating the seismicity that accompanies volcanic activity and others attempting to map the subsurface extent and ...
Konstantinou, K.I., Konstantinou, Konstantinos I.   +1 more
core  

A three-dimensional study of a crustal low velocity region beneath the 9°03′N overlapping spreading center

, 2003
Overlapping spreading centers (OSCs) play a key role in models of magma distribution at fast spreading ridges. To investigate the relationship between ridge-axis discontinuities and magma supply, we conducted a three-dimensional seismic reflection and ...
Harding, A.J., Pye, J, Kent, GM, Tong, CH, Tong, C.H., Sinha, MC, White, R.S., van Avendonk, H.J.A., Hobbs, R.W., Pye, J.W., Bazin, S, Harding, AJ, Barton, PJ, Hobbs, RW, Kent, G.M., Barton, P.J., Sinha, M.C., HJA, VA, Bazin, S., Orcutt, J.A., Singh, SC, Orcutt, JA, White, RS, Singh, S.C.   +23 more
core   +1 more source

PEMODELAN 3D STRUKTUR BAWAH PERMUKAAN GUNUNGAPI AGUNG PROVINSI BALI MENGGUNAKAN METODE GAYA BERAT

JGE, 2020
Under surface structure, 3d modelling of Agung volcano in Bali had been conducted by using gravity methods. This research aims to identify the magma chamber and make a model below the surface of the Great Volcano of Bali Province by using gravity anomaly
Nasyratul Ilmi, Karyanto Karyanto
doaj   +1 more source

Setting the Record Straight: The Intellectual Legacy of H. Igor Ansoff (1918–2002)

Strategic Change, EarlyView.
ABSTRACT This study presents a comprehensive annotated bibliography of H. Igor Ansoff's intellectual contributions, addressing significant gaps in existing citation databases such as Scopus and Web of Science, which capture only 9 to 15 percent of his work.
Richard W. Puyt
wiley   +1 more source

Fossilized solidification fronts in the Bushveld Complex argue for liquid-dominated magmatic systems

Nature Communications, 2020
Magma storage zones are debated to either be crystal-dominated mush zones or large liquid-dominated magma chambers. Here, the authors discover fossilized solidification fronts of magnetitite in the Bushveld pluton, which indicate nucleation and crystal ...
Willem Kruger, Rais Latypov
doaj   +1 more source

Geochemical Characteristics and Their Geological Significance of Zircon and Apatite From the Wunugetushan Porphyry Cu–Mo Deposit, Inner Mongolia, NE China

Acta Geologica Sinica - English Edition, EarlyView.
The key factors making the monzogranitic porphyry fertile for mineralization, including its high Cl, S, and H2O contents, high oxidation state, significant fluid exsolution, and multiple recharges of deep‐seated mafic magma, were all critical for the formation of the Wunugetushan porphyry Cu‐Mo deposit. ABSTRACT The Wunugetushan (Wushan) porphyry Cu–Mo
Genyuan JI, Sihong Jiang, Yang Cheng, Hongyan Bao, Huachuan Zhang   +4 more
wiley   +1 more source

Climate and the Development of Magma Chambers [PDF]

Geosciences, 2020
Whether magma accumulating in the crust develops into a persistent, eruptible magma body or an incrementally emplaced pluton depends on the energy balance between heat delivered to the bottom in the form of magma and heat lost out the top. The rate of heat loss to the surface depends critically on whether heat transfer is by conduction or convection ...
openaire   +2 more sources

Making Mining Licit: Gold, Commodification, and the Everyday Performance of Law in Colombia

American Anthropologist, EarlyView.
ABSTRACT Ethnographies of resource‐making have shown that the extraction of resource value from objects is premised on obviating the emplaced lifeworlds that surrounded objects before they traveled to consumer markets. Much of this literature looks at such supply‐chain disentanglement from the viewpoint of corporate and formal regulatory practices ...
Jesse Jonkman
wiley   +1 more source

Cyclic activity of the Fuego de Colima volcano (Mexico): insights from satellite thermal data and nonlinear models [PDF]

Solid Earth, 2019
The Fuego de Colima volcano (Mexico) shows a complex eruptive behavior, with periods of rapid and slow lava dome growth punctuated by explosive activity.
S. Massaro, A. Costa, R. Sulpizio, R. Sulpizio, D. Coppola, L. Capra   +5 more
doaj   +1 more source