Results 51 to 60 of about 1,608 (183)

Progressively Fenitised Schist and Carbonatitic Clasts From a Metasomatic Aureole Beneath the Alkalic Dunedin Volcano, Otago, New Zealand

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.
Clasts of albite‐porphyroblastic quartzofeldspathic schist, derived from the Otago Schist basement, occur within the Port Chalmers Breccia, a diatreme at the centre of the Dunedin stratovolcano, New Zealand. Schists have undergone varying degrees of replacement reactions (at temperatures of 300° to >500°C) producing hornfelses, with Ca‐ and K‐enriched ...
Alan F. Cooper
wiley   +1 more source

TOURMALINE AS AN INDICATOR OF TIN OCCURRENCES ОF CASSITERITE-QUARTZ AND CASSITERITE-SILICATE FORMATIONS (A CASE STUDY OF THE VERKHNEURMIYSKY ORE CLUSTER, FAR EAST)

Записки Горного института, 2019
The research focused on the composition of tourmaline from tin ore deposits and ore occurrences within the Verkhneurmiysky ore cluster in the Amur region. The aim of the study is to determine the indicative signs of tourmaline from cassiterite-quartz and
V. I. Alekseev, Yu. B. Marin
doaj   +1 more source

Middle Cretaceous Andean‐Type Arc Evolution in the Sanandaj–Sirjan Zone (Shalair Valley), Iraq: New Geochronological and Geochemical Constraints

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract The middle Cretaceous granitoid plutons of the Shalair Valley, situated in northeastern Iraq, constitute a principal magmatic component of the Sanandaj–Sirjan Zone within the northwestern segment of the Zagros Orogenic Belt. Among these plutons, the equigranular Aulan body (AG) and the porphyritic Laladar body (LG) were crystallized at 111.0 ± 
Imad Kadhim Abdulzahra, Yoshihiro Asahara, Yousif Mohammad, Ayten Hadi   +3 more
wiley   +1 more source

Opioid use disorder and dementia risk: evidence from observational and genetic analyses in diverse ancestry cohorts

Alzheimer's &Dementia, Volume 22, Issue 5, May 2026.
Abstract INTRODUCTION Opioid use disorder (OUD) may adversely affect brain health, but its role in dementia risk remains poorly understood. METHODS We investigated associations between OUD and dementia using observational data from 222,518 participants (European and African ancestry) in the Million Veteran Program and Mendelian randomization (MR) using
Sara Javidnia, James M. Roe, Ville Karhunen, Dipender Gill, Steven Bell, Joseph D. Deak, Daniel Levey, Rachel L. Kember, Henry R. Kranzler, Héléne Toinét Cronjé, Stephen Burgess, Joel Gelernter, Klaus P. Ebmeier, Anya Topiwala   +13 more
wiley   +1 more source

Provenance and Petrological Evolution of Sand Injection Complexes: Insights From Heavy Mineral Analysis in the Paleogene Forearc Succession of the San Joaquin Basin

Basin Research, Volume 38, Issue 3, May–June 2026.
The study of heavy mineral assemblages with statistical analysis resolves provenance signatures and quantifies syn‐emplacement modification of sand injection complexes. Results demonstrate transformative petrological processes, including density‐dependent hydraulic sorting and mechanical grain degradation.
Gustavo Zvirtes, Andrew Morton, Andrew Hurst, Ruy Paulo Philipp, Wiktor Luzinski, Giuseppe Palladino, Luciano Alessandretti   +6 more
wiley   +1 more source

C-CNF Surface Modified Tourmaline and its Dispersion Stability

Kuangchan zonghe liyong
This is an article in the field of mineral processing engineering. Tourmaline has been widely used for its spontaneous polarity, pyroelectric effect, far-infrared radiation and negative-ion release effect.
Baobao PANG, Yingmo HU, Zhen ZHANG, Kui CUI, Shasha WU, Sufang GUO   +5 more
doaj   +1 more source

Tourmalinites of the Brusque Group in the São João Batista-Tijucas area, State of Santa Catarina, Brazil [PDF]

Geologia USP. Série Científica, 2013
The Dom Feliciano Belt, in the State of Santa Catarina, is represented by the Itaja and Brusque groups and the Florianpolis Batholith. The basal Rio do Oliveira Formation of the Brusque Group consists of metabasic/calc-silicate, metavolcanic-exhalative ...
Miguel Angelo Stipp Basei, Fabio Brentan, Gianna Maria Garda   +2 more
doaj   +1 more source

Thermal Buffering, Heat Advection and Crustal Thinning in the Ryoke Metamorphic Complex, Yanai, Southwest Japan

Journal of Metamorphic Geology, Volume 44, Issue 4, Page 287-310, May 2026.
ABSTRACT The metamorphic zoning and geothermobarometry of the Ryoke metamorphic complex in the Yanai area, southwest Japan, show that its thermobaric structure was buffered by the dehydration melting of biotite. The temperatures over most of the area covered by the three high‐grade zones (8.5‐ to 19.0‐km depth) are consistent with those of the ...
Takeshi Ikeda, Kazuhiro Miyazaki, Yu Sugawara, Risa Hayashi   +3 more
wiley   +1 more source

Petrography and Geochemistry of tourmaline nodules from Aderba leucogranite (northeast of Golpaygan) [PDF]

پترولوژی, 2016
The Aderba leucogranite in the Golpayegan metamorphic core complex (GMC), a part of Sanandaj-Sirjan zone, host lentiform small (2*4 cm)(Type 1) and large (7*14 cm)(Type 2)tourmaline nodules. In terms of mineralogical features, the core of these two types
Akramosadat Mirlohi, Mahmoud Khalili
doaj  

Recent Advances in Piezocatalysis and Piezo‐Photocatalysis in Energy and Environment: Materials, Design, and Applications

Rare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT Piezocatalytic technology utilizes mechanical strain or stress‐induced piezoelectric phenomena to produce robust internal electric fields, markedly improving the separation efficiency of e−‐h+ pairs. This method has emerged as a focal point in catalysis by removing reliance on conventional light or electrical energy via its mechanical‐to ...
Yue Zhou, Caihua Liu, Xin Li, Peng Zhan, Xing Xu, Xiaoming Peng   +5 more
wiley   +1 more source