Results 21 to 30 of about 90,092 (222)

Evidence for silicate dissolution on Mars from the Nakhla meteorite [PDF]

, 2013
Veins containing carbonates, hydrous silicates and sulphates that occur within and between grains of augite and olivine in the Nakhla meteorite are good evidence for the former presence of liquid water in the Martian crust.
Smith, C.L., Tomkinson, T., Stuart, F. M., Lee, M.R., Stuart, F.M., Smith, C. L., Lee, M. R., Mark, D. F., Mark, D.F.   +8 more
core   +1 more source

Controlled Cooling‐Rate Experiments on Olivine‐Hosted Melt Inclusions: Chemical Diffusion and Quantification of Eruptive Cooling Rates on Hawaii and Mars

Geochemistry, Geophysics, Geosystems, 2020
Controlled cooling‐rate experiments were conducted on olivine‐hosted melt inclusions to characterize the development of compositional zoning observed in natural inclusions.
Lee M. Saper, Edward M. Stolper
doaj   +1 more source

Variable initial zoning profiles and Fe-Mg diffusion coefficients for olivine: Effects on cooling rates calculated by diffusion modeling in a pallasite [PDF]

, 2004
P(論文)Because chemical zoning of minerals contains information about the thermal history of the parent body, the cooling rate or burial depth can be calculated by solving the diffusion equation. Several factors influence the results of these calculations.
Koizumi,Eisuke, Mikouchi,Takashi, Monkawa,Akira, Miyamoto,Masamichi   +3 more
core   +1 more source

Unique zoned olivines from an ultrabasic—Basic massif in the Noril’sk disitrict [PDF]

Doklady Earth Sciences, 2009
The specifics of the morphology, internal structure, and composition of olivine, one of the major rock forming minerals of ultrabasic and basic rocks, contains valuable information on the conditions of its formation and are widely used in petrology [11, 8, 3, 7, 12]. One of its important characteristics is zoning, which is most pronounced in lunar [8]
Krivolutskaya, N., Sobolev, A., Kuzmin, D., Svirskaya, N.   +3 more
openaire   +2 more sources

Multi-Stage Magma Evolution in Intra-Plate Volcanoes: Insights From Combined in situ Li and Mg–Fe Chemical and Isotopic Diffusion Profiles in Olivine

Frontiers in Earth Science, 2020
Understanding the timescales of magma evolution and ascent is essential for interpreting geophysical monitoring signals from active volcanoes. In this study, we explore the potential of diffusion-driven Li concentration and isotope zoning profiles ...
Lena K. Steinmann, Martin Oeser, Ingo Horn, Stefan Weyer   +3 more
doaj   +1 more source

Titanium and water-rich metamorphic olivine in high-pressure serpentinites from the Voltri Massif (Ligurian Alps, Italy): evidence for deep subduction of high-field strength and fluid-mobile elements [PDF]

, 2014
Titanium- and water-rich metamorphic olivine (Fo 86–88) is reported from partially dehydrated serpentinites from the Voltri complex, Ligurian Alps. The rocks are composed of mostly antigorite and olivine in addition to magnetite, chlorite, clinopyroxene ...
Hattori, Keiko, De Hoog, Jan C. M., De Hoog, J. C. M., Jung, H., Hattori, K., 정해명, Jung, Haemyeong   +6 more
core   +1 more source

Petrography, Geochemistry and tectonomagmatic setting of Tertiary volcanic rocks in Ebrahim abad area(southwest of Gazik), Southern Khorasan [PDF]

پترولوژی, 2019
Volcanic rocks are observed in Ebrahim abad area, southwest of Gazik and in southern Khorasan province that located in northern part of the Sistan suture zone. The studied lavas consist of basaltic andesite, andesite and dacite with Eocene to Miocene age
Neda Amirteymoori, Seyyed Saeid Mohammadi, Malihe Nakhaei   +2 more
doaj   +1 more source

Early-Stage Melt-Rock Reaction in a Cooling Crystal Mush Beneath a Slow-Spreading Mid-Ocean Ridge (IODP Hole U1473A, Atlantis Bank, Southwest Indian Ridge)

Frontiers in Earth Science, 2020
Microtextural and chemical evidence from gabbros indicates that melts may react with the crystal framework as they migrate through crystal mushes beneath mid-ocean ridges; however, the importance of this process for the compositional evolution of ...
Alessio Sanfilippo, Alessio Sanfilippo, Alessio Sanfilippo, Christopher J. MacLeod, Riccardo Tribuzio, Riccardo Tribuzio, C. Johan Lissenberg, Alberto Zanetti   +7 more
doaj   +1 more source

The Role of Crystal Accumulation and Cumulate Remobilization in the Formation of Large Zoned Ignimbrites: Insights From the Aso-4 Caldera-forming Eruption, Kyushu, Japan

Frontiers in Earth Science, 2021
The Aso-4 caldera-forming event (86.4 ± 1.1 ka, VEI-8) is the second largest volcanic eruption Earth experienced in the past 100 ka. The ignimbrite sheets produced during this event are some of the first ever described compositionally zoned pyroclastic ...
Franziska Keller, Olivier Bachmann, Nobuo Geshi, Ayumu Miyakawa   +3 more
doaj   +1 more source

Convective activity in a Martian magma chamber recorded by P‐zoning in Tissint olivine [PDF]

Meteoritics & Planetary Science, 2020
AbstractThe Tissint Martian meteorite is an unusual depleted olivine‐phyric shergottite, reportedly sourced from a mantle‐derived melt within a deep magma chamber. Here, we report major and trace element data for Tissint olivine and pyroxene, and use these data to provide new insights into the dynamics of the Tissint magma chamber.
Mari, Nicola, Hallis, Lydia J., Daly, Luke, Lee, Martin R.   +3 more
openaire   +2 more sources