نتایج جستجو برای: sodic metasomatism

تعداد نتایج: 1182  

Journal: :Journal of Soil Science and Plant Nutrition 2022

Abstract Soil salinity represents one of the major threats land degradation and desertification under arid semi-arid environments. It has an adverse influence on soil-water-plant relationships, posing serious challenges to agricultural productivity. The main objective this work was monitor effect farmyard manure (FYM) application irrigation with low-quality water dynamics dissolved salts yield ...

Journal: :Geomatics and Environmental Engineering 2019

احمدی خلجی, احمد, رجاییه, مریم, طهماسبی, زهرا ,

The studied area is a small portion of Sanandaj – Sirjan zone. Metasomatism at the contact of intrusive body studied and penetration of Al-rich rocks caused tourmalinization to stratiform tourmalinite in pelitic hornfels. In addition, hydrothermal fluids crystallized tourmaline nodules in monzogranite surface. The Fe/ (Fe + Mg) ratio in varied between 0.4-0.76 in stratiform tourmaline and 0.83-...

Journal: :The Journal of the Geological Society of Japan 1956

Journal: :Contributions to Mineralogy and Petrology 2022

Abstract Devolatilization of subducting lithologies liberates COH-fluids. These may become partially sequestered in peridotites the slab and overlying forearc mantle, affecting cycling volatiles fluid mobile elements subduction zones. Here we assess magnitudes, timescales mechanism channelized injection COH-fluids doped with $${\mathrm{Ca}}_{\mathrm{aq}}^{2+}$$ <mml:math xmlns:mml="http://www.w...

2015
N. J. Potts R. Tartèse I. A. Franchi M. Anand

Introduction: On Earth δCl = ~0 ± 5 ‰ [1]. For lunar rocks elevated δCl values of up to 35 ‰ have been reported in apatites [1,2]. The initial study interpreted the elevated δCl in lunar rocks as a result of metal chlorides degassing in low-H2O environments [1]. Additional data [3,4] have shown high-δCl values in samples with apatite containing appreciable amounts of H2O (>2000 ppm). Metasomati...

2009
Chi Ma

Hibonite-(Fe), (Fe,Mg)Al12O19, is the Fe2+-dominant analog of hibonite CaAl12O19, discovered in a highly altered Ca-,Al-rich refractory inclusion from the Allende meteorite. It occurs as scattered micrometer-sized single crystals within an aggregate of hercynite (Fe,Mg)Al2O4, adjacent to nepheline, ilmenite, ferroan spinel, perovskite, and hibonite. The mean chemical composition determined by e...

Journal: :Geological Society of America Bulletin 2021

Abstract We present mineralogical and geochemical compositions of mantle xenoliths from two Cenozoic basalt localities the northeastern North China Craton. These include lherzolite, harzburgite, websterite. They are generally fertile in major elements different typical cratonic lithosphere, which is consistent with previous hypotheses regarding craton destruction. The ratios 87Sr/86Sr (La/Yb)N ...

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