Results 61 to 70 of about 28,419 (225)

Microspherules Formed by Lightning Strikes

Meteoritics &Planetary Science, EarlyView.
Abstract Natural microspherules are formed by high‐temperature processes and are present throughout the geologic record to the present day. We report the discovery of large numbers of microspherules recovered from a rock pavement in the Pilbara region, Western Australia.
M. R. Boyd, M. J. Genge, A. G. Tomkins
wiley   +1 more source

Using Magma Mixing/Mingling Evidence for Understanding Magmatic Evolution at Mount Bidkhan Stratovolcano (South-East Iran) [PDF]

Journal of Sciences, Islamic Republic of Iran, 2010
Mount Bidkhan stratovolcano is located in the central Iranian volcanic belt. It is composed of several types of pyroclastic deposits, lava flows and intrusive bodies.
S Khalili Mobarhan
doaj  

Hybridization in the subvolcanic Jaala-Iitti complex and its petrogenetic relation to rapakivi granites and associated mafic rocks of southeastern Finland [PDF]

Bulletin of the Geological Society of Finland, 1995
The 1630 Ma Jaala-Iitti complex is an example of bimodal rapakivi granite magmatism in which the interaction of granite and diabase magmas have led locally to hybridization.
P.T. Salonsaari
doaj   +1 more source

The effects of pressure on immiscibility in metallic, core‐forming liquids: Implications for protoplanetary differentiation

Meteoritics &Planetary Science, EarlyView.
Abstract Mechanisms for metal core formation in rocky planetesimals and planetary embryos remain poorly constrained, in part due to complexities arising from immiscibility in core‐forming liquids at low pressures. To assess the pressure dependence of immiscibility and its role in protoplanetary differentiation, we performed experiments at 3 and 5 GPa ...
Geoffrey David Bromiley, Hidenori Terasaki, Matthew Varnam   +2 more
wiley   +1 more source

Petrology, Geochemistry, and Magma Evolution Of Basaltic Rocks Of Baturraden Area, Central Java, Indonesia.

JGEET: Journal of Geoscience, Engineering, Environment and Technology
Slamet volcano is the second highest active stratovolcano in Java Island, it has a long volcanic history eruption event, the Baturraden Area is a tourism area in southern part of Slamet Volcano. Baturraden area is the part of Banyumas Regency and it took
Yogi Adi Prasetya, Akhmad Khahlil Gibran, Mochammad Aziz, Siswandi   +3 more
doaj   +1 more source

Plagioclase as evidence of magmatic evolution in the Zafarqand porphyry copper deposit, NE Isfahan

Journal of Economic Geology, 2018
Introduction Chemical and textural zoning patterns preserved in plagioclase phenocrysts can provide useful information on parameters that constrains the changing melt compositions in the magma systems.
Maryam Aminoroayaei Yamini , Faramarz Tutti, Mohammad Reza Aminoroayaei Yamini, Jamshid Ahmadian   +3 more
doaj   +1 more source

Mingling and mixing features in basaltic Andesites of the Eastern Cordillera (Central Andes, 24°s): a petrographic and microanalytical study [PDF]

, 2006
The basaltic andesites of the Diego de Almagro volcanic complex (Central Andes, 24°S, 66°W) were erupted during Late Miocene at 300 km from the active arc, in the Eastern Cordillera, at the easternmost end of an important strike-slip structure, the ...
Gioncada, Anna, Hauster, Natalia, Matteini, Massimo, Mazzuoli, Roberto, Omarini, Ricardo Hector   +4 more
core  

Temporal magmatic evolution of the Fani Maoré submarine eruption 50 km east of Mayotte revealed by in situ sampling and petrological monitoring

Comptes Rendus. Géoscience, 2022
The “Fani Maoré” eruption off the coasts of Mayotte has been intensively monitored by applying methods similar to those used for subaerial eruptions. Repeated high-resolution bathymetric surveys and dredging, coupled with petrological analyses of time ...
Berthod, Carole, Komorowski, Jean-Christophe, Gurioli, Lucia, Médard, Etienne, Bachèlery, Patrick, Besson, Pascale, Verdurme, Pauline, Chevrel, Oryaëlle, Di Muro, Andrea, Peltier, Aline, Devidal, Jean-Luc, Nowak, Sophie, Thinon, Isabelle, Burckel, Pierre, Hidalgo, Samia, Deplus, Christine, Loubrieu, Benoît, Pierre, Delphine, Bermell, Sylvain, Pitel-Roudaut, Mathilde, Réaud, Yvan, Fouchard, Sacha, Bickert, Manon, Le Friant, Anne, Paquet, Fabien, Feuillet, Nathalie, Jorry, Stephan L., Fouquet, Yves, Rinnert, Emmanuel, Cathalot, Cécile, Lebas, Elodie   +30 more
doaj   +1 more source

The mineralogy, petrology, and composition of anomalous eucrite Emmaville [PDF]

, 2017
The Emmaville eucrite is a relatively poorly studied basaltic achondrite with an anomalous oxygen isotope signature. In this study, we report comprehensive mineralogical, petrographic, and geochemical data from Emmaville in order to understand its ...
Barrat, Barrat, Bland, Bogard, Bunch, Clayton, Cleverly, Eggins, Floss, Ghosh, Greenwood, Greenwood, Greenwood, Greenwood, Janots, Lodders, Mandler, Mason, Mayne, McSween, Metzler, Miller, Miller, Mittlefehldt, Mittlefehldt, Mittlefehldt, Morgan, Nyquist, Palme, Papike, Qin, Righter, Rogers, Scott, Spivak-Birndorf, Starkey, Stolper, Takeda, Takeda, Trinquier, Warren, Wasson, Weisberg, Wiechert, Yamaguchi, Yamaguchi, Yamaguchi, Yamaguchi   +47 more
core   +1 more source

Boninite and Harzburgite from Leg 125 (Bonin-Mariana Forearc): A Case Study of Magma Genesis during the Initial Stages of Subduction [PDF]

, 1992
Holes drilled into the volcanic and ultrabasic basement of the Izu-Ogasawara and Mariana forearc terranes during Leg 125 provide data on some of the earliest lithosphere created after the start of Eocene subduction in the Western Pacific.
Arculus, Richard J., Ishii, Teruaki, Murton, Bramley J., Parkinson, Ian J., Pearce, Julian A., Peate, David W., van der Laan, Sieger R.   +6 more
core   +1 more source