...Bernard W. Evans Abstract Sodic actinolite, ferri-winchite, cummingtonite, crossite, and riebeckite occur in a metamorphosed ironstone from Siphnos, Greece, containing in addition deerite, quartz, magnetite, almandine, and aegirine-augite. Salient petrographic features are the following: idio...

... materials could release carbonatitic melts and trigger melting of the overlying lithospheric mantle and the formation of different types of alkaline and calc-alkaline rocks. In this paper, we present a study on a suite of mafic dikes of sodic calc-alkaline lamprophyre (CAL) composition in the eastern...

...Xingli Fan; Qi-Fu Chen; Yinshuang Ai; Ling Chen; Mingming Jiang; Qingju Wu; Zhen Guo Abstract The origin and mantle dynamics of the Quaternary intraplate sodic and potassic volcanism in northeast China have long been intensely debated. We present a high-resolution, three-dimensional (3-D) crust...

... ) ascertained that due to such extensive late magmatic alterations, most textbooks define keratophyre in terms such as sodic trachyte, albite trachyte or albitized trachyte (or andesite), and quartz keratophyre as sodic rhyolite, soda dacite, albite rhyolite (or dacite), albitized rhyolite (or dacite), albite...

...Ming Lei; Zhengfu Guo; Wenbin Zhao; Maoliang Zhang; Lin Ma Abstract This study presents an integrated geochemical study of the Wudalianchi-Erkeshan potassic basalts and Halaha sodic basalts of NE China, and uses these data to further our understanding of the petrogenetic relationships between...

...Kevin Byrne; Robert B. Trumbull; Guillaume Lesage; Sarah A. Gleeson; John Ryan; Kurt Kyser; Robert G. Lee Abstract The Highland Valley Copper porphyry Cu (±Mo) district is hosted in the Late Triassic Guichon Creek batholith in the Canadian Cordillera. Fracture-controlled sodic-calcic alteration...

...Simone E. Runyon; Phillip A. Nickerson; Eric Seedorff; Mark D. Barton; Frank K. Mazdab; Pilar Lecumberri-Sánchez; Matthew Steele-MacInnis Abstract Sodic-calcic alteration has affected numerous districts with Laramide porphyry systems across Arizona and New Mexico. Previously undocumented Na-Ca...

...Lucy P. Reading; Thomas Baumgartl; Keith L. Bristow; David A. Lockington Abstract Management of sodic soils under irrigation often requires application of chemical ameliorants to improve permeability combined with leaching of excess salts. Modeling irrigation, soil treatments, and leaching...

...R. Oberti; M. Boiocchi; N. A. Ball; F. C. Hawthorne Abstract Fluoro-sodic-ferropedrizite, ideally A Na B Li 2 C ( \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \(\mathrm{Fe}_{2}^{2...

...S. Hillier; A. L. Pharande Abstract Increasing use of irrigation in India has exacerbated the problems of soil salinity and sodicity. The present study was undertaken on shrink-swell soils from Maharastra State to determine if changes in soil chemistry due to irrigation have affected the clay...

... ), northern Tibetan Plateau. Based on the quantities and analyzed compositions of the exsolved lamellae and host phases, they concluded that this garnet-peridotite body formed at depths greater than 200 km. In this contribution, we report new findings of some unusual exsolution lamellae of sodic amphiboles...

... that the sample consists of a mixture of two distinct amphibole compositions, tremolite and a new amphibole end-member, fluoro-sodic-pedrizite, ideally A Na B Li 2 C (Mg 2 Al 2 Li) T Si 8 O 22 X F 2 (IMA-CNMMN 2004-002). Fluoro-sodic-pedrizite from Tastyg has the following crystal-chemical formula and unit-cell...

... he association of sodic (±calcic) alteration with deposits of the mesothermal Fe oxide-Cu-Au category has been recognized for some time ( Hitzman et al., 1992 ; Williams, 1994 , 1998 ; deJong and Williams, 1995 ; Barton and Johnson, 1996 ; Frietsch et al., 1997 ; Haynes, 2000 ; Marschik et...

... described species via the homovalent exchanges M 1 (Fe 2+ Mg −1 ) and M 2 (Fe 3+ Al −1 ), and represent the compositions richest in Fe in this compositional space. The ideal formula of ferri-clinoferroholmquistite is A □ B Li 2 C (Fe 3+ 2 Fe 2+ 3 ) T Si 8 O 22 X (OH) 2 , and that of sodic-ferri...

... unit (apfu) and low Zn contents. In episyenites from Fuente Grande, the B-site composition also encompasses that of sodic amphiboles, while the Zn contents are generally higher (> 2.0 wt%) and similar to those of biotites from the granitoid protolith. Amphibole crystals are generally very...

... and alkali feldspar granite. A series of flat-lying sills are interpreted to be late-stage differentiates, based on their timing, mineralogy, and chemistry. In parts of the prospect there is pervasive sodic-calcic alteration (pyroxene after amphibole, albite after K feldspar and oligoclase) of the plutonic...