Results 31 to 40 of about 3,307 (182)

Observation of centimetre-scale argon diffusion in alkali feldspars: implications for ⁴⁰Ar/³⁹Ar thermochronology [PDF]

, 2013
New data from a gem-quality feldspar from Itrongay, Madagascar, record naturally occurring 40Ar/39Ar age profiles which can be numerically modelled by invoking a single diffusion mechanism and show that microtexturally simple crystals are capable of ...
Flude, Stephanie, Halton, Alison M., Kelley, Simon P., Schwanethal, James, Sherlock, Sarah C., Wilkinson, Camilla M.   +5 more
core   +3 more sources

The Paleo‐Tethys Suture Zone in the Afghan Hindu Kush‒Pamir: Geo‐Thermochronology, Geochemistry, Tectonics

Tectonics, Volume 45, Issue 3, March 2026.
Abstract In the Afghan Hindu Kush, the 223–209 Ma (≤800°C) Salang batholith is part of the Silk‐Road magmatic arc that was built on ∼40‐km‐thick Turan‐Karakum block continental crust. The batholith constitutes the hanging wall of the Herat‐Panjshir‐Badakhshan—the Paleo‐Tethys—suture zone, vestige of the subducted Paleozoic‐early Mesozoic Paleo‐Tethys ...
Lothar Ratschbacher, Said Amin Hashimy, Hasan Malistani, Yasuhito Osanai, Jianhua Li, Zhao Yang, Bradley R. Hacker, Leander Franz, Hadi Karimi   +8 more
wiley   +1 more source

Multi‐Method Geochronology and P‒T Modeling Unravels the Thermo‐Tectonic History of the Rudall Province, Western Australia

Tectonics, Volume 45, Issue 2, February 2026.
Abstract The Rudall Province (RP) is a Paleo‐Mesoproterozoic belt that records numerous overprinting tectono‐metamorphic events. Situated on the eastern edge of the West Australian Craton (WAC), the RP represents a key area for understanding the Proterozoic assembly and subsequent tectonic history of Western Australia.
Alejandra Bedoya, Martin Hand, Xiao‐Fang He, Jade Anderson, David E. Kelsey, Christopher L. Kirkland, Stijn Glorie   +6 more
wiley   +1 more source

The Mountain Pass Rare-Earth Deposits [PDF]

, 1954
Rare-earth minerals were discovered near Mountain Pass in northeastern San Bernardino County, Calif., in April 1949, and in the following year the Sulphide Queen carbonate body was found.
Olson, J. C., Pray, L. C.
core  

Mineralization Characteristics of the Li‐rich Muscovite Granite in the Mufushan Batholith, Central China: Insights into the Rare Metal Mineralization Models of Batholithic Complex

Acta Geologica Sinica - English Edition, Volume 100, Issue 1, Page 137-155, February 2026.
Abstract Elucidating the mineralization mechanisms of individual granitic stages and tracing magmatic evolution processes are critical for establishing mineralization models of large‐scale batholiths. The Mufushan granitoid batholith, renowned for multistage magmatism and large‐scale rare metal mineralization, mainly comprises biotite, two‐mica, and ...
Hao ZHANG, Peng LI, Jiankang LI, Lulu YUAN, Pengfei JIANG, Ze LIU, Jin YIN, Zhuo CHEN   +7 more
wiley   +1 more source

Geology and geochemistry of the Redrock Granite and anorthosite xenoliths (Proterozoic) in the northern Burro Mountains, Grant County, New Mexico, USA [PDF]

, 2002
Mineral ages from the A-type granites and anorthosite xenoliths in the Redrock area in the northwestern Burro Mountains in southwestern New Mexico cluster around ~1220–1225 Ma and provide yet another example of bimodal igneous activity during this time ...
Ilmari Haapala, Matt Heizler, Nelia Dunbar, O. Tapani Rämö, Paula J. Kosunen, Virginia T. McLemore   +5 more
core   +1 more source

Hematite Formation During Skarn Mineralization in the Akatani Iron Deposit, Niigata Prefecture, Japan

Resource Geology, Volume 76, Issue 1, January/December 2026.
The Akatani Fe deposit in NE Japan has been regarded as a skarn deposit because iron‐oxide ores occur within marble‐hosted skarn near the Cretaceous Ninoujidake granite. U–Pb dating of fluorapatite in the skarn indicates that this skarn formed in the Late Cretaceous, contemporaneous with the granite.
Kotaro Seno, Yasushi Watanabe, Takuya Echigo, Shogo Aoki, Keita Itano, Shota Satori, Yoshiaki Kon   +6 more
wiley   +1 more source

Typomorphism of perthitic intergrowth of feldspars from granitic pegmatites from the area of west Azov (Ukrainian shield) [PDF]

, 2014
Приведены данные о вещественном составе графических пегматитов с различной специализацией кварца и отмечено широкое развитие пертитовых вростков в полевых шпатах.
Slivnaya, E. V., Сливная, О. В., Сливная, Олена Василівна   +2 more
core  

Review of Analytical Lithium Detection and Quantification Methods Along the Lithium Value Chain

Applied Research, Volume 4, Issue 6, December 2025.
This article reviews a selection of suitable state‐of‐the‐art analytical methods for different scales of spatial resolution and detection of lithium for a variety of lithium‐bearing materials along the lithium value chain. The various materials differ greatly in terms of their lithium content by more than 5 orders of magnitude and also vary in their ...
Nico Kropp, Ralf Halama, Ralf B. Wehrspohn   +2 more
wiley   +1 more source

Diffusion and fluid interaction in Itrongay pegmatite (Madagascar): Evidence from in situ 40Ar/39Ar dating of gem-quality alkali feldspar and U Pb dating of protogenetic apatite inclusions

Chemical Geology, 2020
Alkali feldspar 40Ar/39Ar and apatite UPb geochronological studies have typically invoked two mechanisms to account for apparent loss of radiogenic 40Ar and 206-208Pb. Some studies have suggested that the radiogenic isotopes were lost by volume diffusion and used these dates to constrain temporal variations of rock temperatures; others have argued that
Popov, Daniil V., Spikings, Richard A., Scaillet, Stéphane, O'Sullivan, Gary, Chew, David, Badenszki, Eszter, Daly, J. Stephen, Razakamanana, Théodore, Davies, Joshua H.F.L.   +8 more
openaire   +4 more sources