Results 81 to 90 of about 13,826 (203)

EMPA analyses of chlorite, biotite, hornblende, pyroxene, apatite, magnetite, rutile, ilmenite and titanite

open access: yes, 2019
Chemical compositions of chlorite, biotite, hornblende, pyroxene, apatite, magnetite, rutile, ilmenite and ...
Chen, H (via Mendeley Data)
core   +1 more source

Diffusion kinetics of 3He in pyroxene and plagioclase and applications to cosmogenic exposure dating and paleothermometry in mafic rocks [PDF]

open access: yesGeochronology
In this study, we investigate the diffusivity of cosmogenic 3He in a variety of plagioclase and pyroxene compositions, and its application to paleothermometry and exposure dating in these minerals, through stepwise degassing experiments. While cosmogenic
M. Bergelin   +5 more
doaj   +1 more source

Thermal history of an amoeboid olivine aggregate in the early solar nebula

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract Carbonaceous chondrites commonly contain amoeboid olivine aggregates (AOAs). Here, we investigated an AOA in the CR chondrite Y‐793261. This AOA contains an unstable assemblage of forsterite and quartz. We found a rare occurrence of enstatite and quantitatively discuss its formation process.
M. Kimura   +3 more
wiley   +1 more source

(Table T3) Major element oxides of cumulus pyroxene from ODP Hole 179-1105A

open access: yes, 2003
(Table T3) Major element oxides of cumulus pyroxene from ODP Hole 179 ...
Peter Thy (6964283), Thy, Peter
core   +1 more source

Gunung Api purba Watuadeg: Sumber erupsi dan posisi stratigrafi

open access: yesIndonesian Journal on Geoscience, 2014
http://dx.doi.org/10.17014/ijog.vol3no3.20081Pillow lava flows of pyroxene basalt containing 50 wt.% SiO are exposed at Opak River, west of Watuadeg Village, Sleman - Yogyakarta. The length of flow structures is between 2 – 10 m, with diameter of 0.5 – 1.
Sutikno Bronto   +3 more
doaj   +1 more source

Geological and geochemical characteristics and genesis of the Cishan gold deposit in Tongling ore cluster area, Anhui Province

open access: yesSolid Earth Sciences, 2020
The Cishan gold deposit is a newly discovered medium-scale independent skarn gold deposit located in the Tongling ore cluster area of the Middle-Lower Yangtze Metallogenic Belt, and the ore-related intrusion is the Cishan pyroxene diorite. In this study,
Shasha Liu   +5 more
doaj   +1 more source

Valence State Partitioning of V between Pyroxene and Melt for Martian Melt Compositions Y 980459 and QUE 94201: The Effect of Pyroxene Composition and Crystal Structure [PDF]

open access: yes, 2014
A spiked (with REE, V, Sc) martian basalt Y980459 composition was used to synthesize olivine, spinel, and pyroxene at 1200 C at 5 oxygen fugacities: IW-1, IW, IW+1, IW+2, and QFM. The high spike levels for REE were used for two specific reasons.
Bell, A. S.   +5 more
core  

(Table 2) Geochemistry of detrital pyroxene grains from DSDP Hole 60-453

open access: yes, 1982
(Table 2) Geochemistry of detrital pyroxene grains from DSDP Hole 60 ...
Williams, Kenneth L   +5 more
core   +1 more source

Hematite formed from pyroxene on Mars by meteoritic impact [PDF]

open access: yes, 1994
In earlier work, we showed using Mossbauer data that the mineralogy of iron-bearing phases in impact melt rocks from Manicouagan Crater (Quebec, Canada) is to a first approximation hematite and pyroxene.
Morris, Richard V.   +2 more
core  

Mineralogy and Petrology of an Olivine Diabase Sill Complex and Associated Unusually Potassic Granophyres, Sierra Ancha, Central Arizona [PDF]

open access: yes, 1969
The Precambrian Sierra Ancha sill complex, 700 to 800 feet thick, was intruded into flat-lying sedimentary rocks of the Apache Group in central Arizona. The bulk of the complex consists of a central layer of feldspathic olivine-rich diabase and upper and
Smith, Douglas
core   +1 more source

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