Results 51 to 60 of about 1,482 (183)

Determining magmatic series and oxygen fugacity of volcanic rocks in the east of Kamu, north of Isfahan, based on biotite chemistry

Journal of Economic Geology, 2014
Volcanic rocks of interest are situated in the middle part of the Urumieh-Dokhtar Magmatic Arc (UDMA). They are parts of a vast magmatic province located in the north of Bitlis-Zagros suture zone.
Mohammad Sayari, Morteza Sharifi, Jamshid Ahmadian   +2 more
doaj  

Atmospheric Chemistry of Secondary and Hybrid Atmospheres of Super Earths and Sub-Neptunes

The Astrophysical Journal
The atmospheres of small exoplanets likely derive from a combination of geochemical outgassing and primordial gases left over from formation. Secondary atmospheres, such as those of Earth, Mars, and Venus, are sourced by outgassing. Persistent outgassing
Meng Tian, Kevin Heng
doaj   +1 more source

Geology and mineralization of the Dongping supergiant alkalic-hosted Au-Te deposit (>100 t Au) in Northern Hebei Province, China: A review

China Geology
: The Dongping deposit is the largest alkalic-hosted gold deposit in China containing >100 t of Au. This paper presents a new understanding for Dongping ore system, based on the previous studies.
Shi-min Zhen, Da-zhao Wang, Zhong-jian Zha, Hai-jun Bai, Jiang Wang   +4 more
doaj   +1 more source

Sensibility of Tourmaline Chemistry to Granitic Magma Composition and Oxygen Fugacity

, 2022
Extensive granitic magmatism is a dominant feature of the Central Iberian Zone (CIZ) of the Variscan Orogen. For the most part, these are S-type peraluminous granitic rocks exhibiting variable degrees of evolution and compositions ranging from granodiorites, through mon zogranites and granites to leucogranites, bearing either biotite and muscovite, or ...
Ribeiro da Costa, Isabel, Antunes, Isabel Margarida Horta Ribeiro   +1 more
openaire   +3 more sources

Sulfur degassing at Erta Ale (Ethiopia) and Masaya (Nicaragua) volcanoes: Implications for degassing processes and oxygen fugacities of basaltic systems

Geochemistry, Geophysics, Geosystems, 2013
We investigate the relationship between sulfur and oxygen fugacity at Erta Ale and Masaya volcanoes. Oxygen fugacity was assessed utilizing Fe3+/∑Fe and major element compositions measured in olivine‐hosted melt inclusions and matrix glasses.
J. M. deMoor, T. P. Fischer, Z. D. Sharp, P. L. King, M. Wilke, R. E. Botcharnikov, E. Cottrell, M. Zelenski, B. Marty, K. Klimm, C. Rivard, D. Ayalew, C. Ramirez, K. A. Kelley   +13 more
doaj   +1 more source

Mineral chemistry, petrography and crystallization conditions of the Middle Eocene Kazıkbeli Pluton (Eastern Pontides, NE Türkiye)

Bulletin of the Mineral Research and Exploration
The Eastern Pontides host a diverse suite of plutonic rocks spanning a wide range of ages and compositions. Among these, the Middle Eocene Kazıkbeli pluton, located in the Kürtün districtof Gümüşhane, stands out due to its distinctive petrological ...
Cem Yücel, Emre Aydınçakır, Abdullah Kaygusuz, Zikrullah Samet Güloğlu   +3 more
doaj   +1 more source

The Role of Bubbles in Air‐Sea Gas Exchange: A Critical Review

Reviews of Geophysics, Volume 64, Issue 3, September 2026.
Abstract Air‐sea gas exchange regulates the exchange of climatically important gases between the ocean and the atmosphere, shaping both climate and ocean biogeochemistry. Bubbles beneath the sea surface enhance this exchange by introducing an additional transfer pathway in parallel to the interfacial transfer route.
Yuanxu Dong, Bernd Jähne, David K. Woolf, Kerstin E. Krall, Mingxi Yang, Helen Czerski, Junhong Liang, Ian M. Brooks, Craig L. McNeil, Rik Wanninkhof, David T. Ho, Dariia Atamanchuk, Christa A. Marandino   +12 more
wiley   +1 more source

Light Element Exsolution in Fe‐Si‐C‐(H) System: A Mechanism for Powering Mercury's Early Core Dynamo

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract Mercury is one of the few terrestrial planets in the solar system with a magnetic field, yet the energy source to power its core dynamo remains unclear to date. Si, C, and possibly H are the top candidate light elements for its liquid core. Here, we showed experimentally that Si, C, and H in Fe‐Si‐C and Fe‐Si‐C‐H liquids share a simultaneous ...
Yuanjing Li, Liangliang Zhang, Fabin Pan, Xiaojing Lai, Xiang Wu, Feng Zhu   +5 more
wiley   +1 more source

Engineering Polymeric Membranes for CO₂ Separation: Materials, Fabrication, Challenges, and Future Perspectives

Carbon Neutralization, Volume 5, Issue 4, July 2026.
Overview of polymeric and mixed‐matrix membranes for CO₂ separation, highlighting key materials, fabrication techniques, performance challenges, and innovations supporting industrial decarbonization and sustainable development. ABSTRACT Carbon dioxide (CO₂) emissions from anthropogenic sources are major contributors to global warming and climate change,
Muhammad Mansha, Noreen Abass, Faizah Altaf, Shehzada Muhammad Sajid Jillani, Safyan Akram Khan, Shahid Ali   +5 more
wiley   +1 more source

APG2: a New Version of APG, an Application for Amphibole-Plagioclase Geothermobarometry [PDF]

Journal of Sciences, Islamic Republic of Iran, 2016
APG2 is a computer application designed for amphibole-plagioclase geothermobarometry. It is the first updated version of APG and supports 4 thermometer models and 6 barometer models involving either amphibole-plagioclase or amphibole only.
M. Sayari
doaj