Results 81 to 90 of about 4,092 (217)
The mineralogy, geochemistry, and petrogenesis of the grønnedal-íka alkaline igneous complex, south-west Greenland [PDF]
, 1989 At 1299±17 Ma (Blaxland et al, 1978), the Grønnedal-Íka is the oldest of the Gardar centres, situated in the extreme north-west of the province. Hare-earth clement (REE) trends suggest that the nepheline-syenites which make up the bulk of the complex ...
Bedford, Christopher M.
core
New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.The Torlesse Composite Terrane (TCT) forms many of the mountain ranges in Aotearoa New Zealand and has provided enormous quantities of coarse‐grained sediment to Te Riu‐a‐Maui/Zealandia's basins since the mid‐Cretaceous. Tracing the provenance of these sediments to certain regions of the TCT can indirectly reconstruct exhumation patterns associated ...
Matthew O. Parker +5 more
wiley +1 more source
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.Abstract The seismic behavior of subduction megathrusts varies spatially and is influenced by the properties of subducting plates, including their sedimentary cover. Characterizing these subduction inputs is essential for understanding the mechanisms behind fault slip variability.
Philip M. Barnes +12 more
wiley +1 more source
Kuangchan zonghe liyongThe fine-grained low-grade tail mud of the Yichun tantalum niobium ore contains 0.17% Li2O，0.007 1% Ta2O5，0.007 8% Nb2O5, and whiteness is 24.20%. Mineralogical studies indicate that tantalum-niobium minerals and lithium mica particles in the tailings ...
Qiangqiang WANG +5 more
doaj +1 more source
Alkali-Feldspar as a Catalyst for Biomass Gasification in a 2-MW Indirect Gasifier
, 2017 The aim of this work was to investigate the potential of alkali-feldspar ore [(K, Na)AlSi3O8] as an alternative bed material for indirect gasification of biomass.
Berguerand, Nicolas, +5 more
core +1 more source
The alkali feldspar solvus at 1 kilobar water vapour pressure
, 1974 SUMMARY. The compositions of feldspar pairs crystallized from stoichiometric alkali feldspar gels with water at Pg~o ~ I kbar in runs of up to 3ooo hours ' duration vary with Na: K in the starting material.
Ian Parsons, Peter Smith
core +1 more source
Results in EngineeringRubidium (Rb) and cesium (Cs), as rare alkali metals, play a critical role in high-tech industries. However, their efficient extraction from associated mineral resources is challenging, especially in lithium-bearing clays due to fine-grained ...
Keqiang Chen +7 more
doaj +1 more source
POLYCHROME CANCRINITE–VISHNEVITE OF ALKALI PEGMATITES OF THE KUROCHKIN LOG OCCURRENCE, VISHNEVYE MOUNTAINS OF THE URALS [PDF]
Минералогия, 2018 Polychrome cancrinite–vishnevite crystal was found in alkali nepheline-feldspar pegmatites of the Kurochkin Log occurrence from the Vishnevye Mountains in the Southern Urals.
V.A. Popov, V.I. Popova
doaj
Structural Modification of KAISiO4 Minerals
, 1997 Kalsilite, a polymorph of KAISiO4 is an end member of nepheline-kalsilite series and the mineral was syn-thesized by hydorhermal methods. The synthetic kalsilite is hexagonal, P63, with a=5.151(5), c=8.690(8) A.
Okamoto, Yasuhiko
core +1 more source
Fabrication of electrical porcelain insulator from ceramic raw materials of Oromia region, Ethiopia
Heliyon, 2019 Electrical porcelain insulator was fabricated from local ceramic raw materials, Bombowha kaolin/clay, Arero feldspar and Arero quartz available in Ethiopia.
Andualem Merga +4 more
doaj +1 more source