Results 91 to 100 of about 10,401 (241)

On "Bidalotite", a new orthorhombic pyroxene derived from cordierite

open access: yes, 1937
The paper gives an account of a new type of orthorhombic pyroxene recently discovered in the biotite-cordierite-hypersthene granulites occurring near the village Bidaloti in Mysore.
Rama Rao, L., Rama Rao, B.
core   +1 more source

Protracted High‐Grade Metamorphism and Slow Cooling in the Adirondacks Recalibrate Neoproterozoic Global Paleogeography

open access: yesTectonics, Volume 45, Issue 6, June 2026.
Abstract The assembly and breakup of the supercontinent Rodinia set the stage for Earth system evolution through the Neoproterozoic Era. Laurentia, the central craton in Rodinia, lacks well‐dated paleomagnetic poles between ca. 990 Ma and 780 Ma. In this study, we develop new U‐Pb petrochronology and thermochronology data sets from zircon, garnet ...
Yiming Zhang   +6 more
wiley   +1 more source

Co-Existing Pyroxenes [PDF]

open access: yesGeological Magazine, 1961
Discussion of articles by Muir and Tilley, M. J. O9Hara, and A. F. Wilson, pointing out that the distribution coefficient can be taken as a direct measure of the distribution of Mg and Fe between orthopyroxene and clinopyroxene, and suggesting that projection of tie-lines is meaningless and should be abandoned.
openaire   +1 more source

Syn‐ to Post‐Collisional Tectonic History of the Paleo‐Tethyan Orogenic Belt: Insights From Triassic Igneous Rocks in the North–Central Tibetan Plateau, China

open access: yesGeochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract The closure of the Paleo‐Tethys Ocean was one of the most important global geological events which formed the framework of the East Asian continent during the early Mesozoic. The Longmu Co‐Shuanghu suture zone is considered to record closure of the main basin of the Paleo‐Tethys Ocean.
Jinyong Li   +6 more
wiley   +1 more source

Study of the Extraterrestrial Materials at Antarctica, IV. : On the Yamato Meteorites

open access: yesAntarctic Record, 1974
Additional mineralogical and chemical studies of the Yamato meteorites are under way. The mode analysis and the optical properties in thin sections are examined under a microscope.
Makoto SHIMA   +2 more
doaj   +1 more source

Production rate calibration for cosmogenic 10Be in pyroxene by applying a rapid fusion method to 10Be-saturated samples from the Transantarctic Mountains, Antarctica [PDF]

open access: yesGeochronology
Measurements of multiple cosmogenic nuclides in a single sample are valuable for various applications of cosmogenic nuclide exposure dating and allow for correcting exposure ages for surface weathering and erosion and establishing exposure–burial history.
M. Bergelin   +4 more
doaj   +1 more source

Analysis of pyroxene absorptions observed in Martian dark regions

open access: yes, 1993
We have investigated the mineralogy of the Martian dark regions by analysis of the pyroxene Fe(2+) absorption band near 1.0 micron in a set of VIS/NIR reflectance spectral images.
Miller, J. S., Singer, R. B.
core  

Deep Origin and Shallow Launch for the Etna 122 B.C. Mafic Plinian Eruption

open access: yesGeochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract Basaltic Plinian eruptions challenge our understanding of explosive volcanism. The 122 B.C. Plinian eruption of Etna ranks among the most powerful mafic explosive events known. Here, we combine volatile barometry of 122 B.C. from olivine‐hosted melt and fluid inclusions with comparative data from the sub‐Plinian Fall Stratified eruption at ...
M. Gavrilenko   +6 more
wiley   +1 more source

Optimization of performance and composition for glass ceramics prepared from mixing molten slags

open access: yes工程科学学报, 2019
The direct preparation of materials from high-temperature slag is an effective way for the integrated utilization of slags and their thermal energy. In this paper, with ferronickel slags and blast furnace slags as the main raw materials, glass ceramics ...
LI Yu   +3 more
doaj   +1 more source

Transformation of Refractory Oceanic Lithospheric Mantle by Reactive Melt Infiltration: An Experimental Study on the Roles of Temperature, Melt Volume and Ascent Velocity

open access: yesJournal of Geophysical Research: Solid Earth, Volume 131, Issue 6, June 2026.
Abstract Reactive melt infiltration critically modifies the physical and chemical properties of the oceanic lithospheric mantle (OLM). This process, involving melt‐rock reactions and in situ crystallization, exhibits substantial spatial and temporal variability driven by melt volume and ascent velocity.
Yong‐Sheng Hou   +4 more
wiley   +1 more source

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