Results 41 to 50 of about 54,225 (159)

Geochemical and Isotopic Constraints on Long‐Lived Source Enrichment and Mantle Evolution in Paleoproterozoic Cratonic Lamprophyres

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract The cratonic lithospheric mantle records complex metasomatic processes and is frequently tapped by alkaline magmatism, offering a unique opportunity to trace the progressive evolution of the mantle. In the present contribution, we investigate a newly identified calc‐alkaline lamprophyre field from the Neoarchean Jonnagiri Schist Belt, Eastern ...
Sourav Naskar, Rohit Pandey, Nils Björn Baumann, N. V. Chalapathi Rao, George Mathew, J. Amal Dev, J. K. Tomson   +6 more
wiley   +1 more source

REE-bearing minerals in the Rapakavi Grante, Southern Finland

Open Geosciences, 2015
The studied rock samples belong to the classic1615–1645 Ma Wiborg Rapakivi granite terrane of southeasternFinland. Geochemical studies show that the rapakivigranites and associated rocks form metaluminousto peraluminous A-type granites and plot in the ...
Al-Ani Thair
doaj   +1 more source

Mineralogy, geochemistry and gemology of fluorite in carbonate rocks of the Pinavand deposit (Central Iran Zone) [PDF]

پترولوژی
Fluorite deposits in Iran are widely located in dolomites and dolomitic limestones (Triassic-Cretaceous age) (Darvishzadeh, 1991) in Alborz and the Central Iran zone (Rajabi et al., 2013).
Farimah Ayati, Mohammad Ali Mackizade, Roghaye Heidari   +2 more
doaj   +1 more source

Eastward Growth of the Tibetan Plateau Linked to Cenozoic Orogenic Wedge Deformation and Fluctuating Melt Sources

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract The India–Asia collision continuously loads the Tibetan Plateau (TP), driving its Cenozoic eastward growth. This process has caused extensive crustal deformation and a diverse magmatic response. Here, we report on newly identified 35−6.5 Ma granitoids from Kangding area in southeastern (SE) TP.
Quan Ou, Jia‐Jing Mei, Derek A. Wyman, Jian‐Qing Lai, Feng Zi, Kun Wang, Jing‐Yi Liu, Jia Liao, Zhiwu Li   +8 more
wiley   +1 more source

Investigation on geochemistry and genesis of Qahr-abad fluorite deposit, southeast of Saqqez, Kordestan province

Journal of Economic Geology, 2012
Qahr-abad fluorite deposit is located 58 km southeast of Saqqez, in northwestern Kordestan province and in northern end of Sanandaj-Sirjan Zone. The factors such as change in physicochemical conditions of mineralization environment (pH and Eh), variation
Babak Talaei, Ali Abedini
doaj   +3 more sources

Systemic Governance From Below: Story Telling to Empower Access to the Commons Through Mapping and Modelling: A Mixed Methods Approach

Systems Research and Behavioral Science, Volume 43, Issue 3, Page 958-977, May/June 2026.
ABSTRACT Access to forests, farming land and the Citarum river is limited in Tarumajaya; furthermore, many do not own their own housing and are dependent on the public and private landowners in the area. The region of Tarumajaya faces significant challenges in access to crucial resources such as forests, farming land and the Citarum river, leading to a
Rudolf Wirawan, Janet Judy McIntyre‐Mills, R. Riswanda R. Riswanda, Ida Widianingsih, Indra Gunawan   +4 more
wiley   +1 more source

Rare Earths in fluorite deposits of Elika Formation (East of Mazandaran Province

Journal of Economic Geology, 2016
Introduction The Central Alborz in eastern Mazandaran province is host to the most important carbonate-hosted fluorite deposits in Iran, such as Pachi-Miana, Sheshroodbar, Era and Kamarposht.
Zahra Mehraban, Behnam Shafiei Bafti, Gholam Hossein Shamanian   +2 more
doaj  

Lanthanide Geochemistry and Fluid Inclusion Peculiarities of the Fluorite from the Barite Deposits South of Kresevo (Bosnia and Herzegovina)

Geologia Croatica, 2010
Strata-bound barite deposits occur in Devonian dolomites, situated in the Mid-Bosnian Palaeozoic Schist Mountains. These contain barite as the main ore mineral (5.9 wt% SrSO4 on average and d34S= +8.3‰) which comprises 90-99 wt% of the bulk ores ...
Ladislav A. Palinkaš, Ivan Jurković
doaj   +1 more source

Contrasting Rare Earth Element Signatures Between Stromatolitic Carbonates and Lagoon Waters at Shark Bay, Western Australia: Implications for Paleo‐Environmental Reconstructions of Microbial Habitats

Geobiology, Volume 24, Issue 3, May/June 2026.
ABSTRACT Rare earth elements and yttrium (REY) signatures in stromatolitic carbonates have emerged as powerful geochemical proxies for reconstructing paleo‐depositional environments of microbial habitats. The applicability of such a proxy relies on the assumption that REY substitutes for calcium into crystal lattices, directly reflecting the ...
S. Viehmann, A.‐L. Zocher, S. V. Hohl, D. Kraemer, A. Martin, M. Markowska, S. Weyer   +6 more
wiley   +1 more source

A Crystallographic Shear Driven by Oxygen Insertion in (LuFeO3)nLuFe2O4

ChemistryEurope, Volume 4, Issue 4, April 2026.
Layered structures (LuFeO3)nLuFe2O4 exhibit a common structural transformation upon oxygen uptake. Although the LuFeO3 units do not directly participate in oxygen insertion, these inactive layers nevertheless influence the temperature at which oxygen absorption occurs.
Tianyu Li, Stephanie J. Hong, Sz‐Chian Liou, Emily Foley, Hadas Elazar‐Mittelman, Xiuquan Zhou, H. Cein Mandujano, Efrain E. Rodriguez   +7 more
wiley   +1 more source