Zn-Rich Spinel in Association with Quartz in the Al-Rich

Al-rich metapelites from the Mashan khondalite series are characterized by the assemblage Spl+Grt+Sil+Crd+Bt+Pl (An₇₂)+Kfs+Quartz+graphite. Large amounts of spinel+quartz assemblages occur as inclusions in garnet and prismatic sillimanite in the Al-rich metapelites of the Mashan complex, NE China. The chemical composition of spinel is characterized by Zn-rich (<i>X</i>_Zn=0.33–0.40. <i>X</i>_Zn=Zn/Zn+Mg+Fe*) (Fe*=Fe²⁺+Fe³⁺) and Fe³⁺ rich (up to 0.31 p.f.u.). The characteristic chemical composition and the mineral association indicated that the formation of spinel and quartz assemblage may be due to the breakdown of Zn-rich staurolite. The geothermobarometers studies show that the peak temperature of the Mashan complex is around 820 ℃ and the peak pressures is 8.0 kbar. The Mashan complex shows a typical orogen style <i>P</i>-<i>T</i> path.

Zn-Rich Spinel in Association with Quartz in the Al-Rich Metapelites from the Mashan Khondalite Series, NE China

Geochemistry of detrital zinc-rich chromite in conglomerates from eastern India, Mineralogical Magazine

PDF) Characterizing Zinc-Rich Chromite Cores and Uvarovite-Grossular Garnet Mantles from the Pikoo Property, Central Eastern Saskatchewan, Canada

Triangular diagram in terms of molar proportions of Al 2 O 3 , MgO and

Super Well Matched!!. Nick in the girdle. Price Low!!. WEIGHT 1: 0.86 ct. WEIGHT 2: 0.89 ct.SIZE 1: 8.15 * 4.15 * 2.49 mm. SIZE 2: 8.20 * 4.29 *

Rich Burmese Red Spinel. Hard to Find Pair, Baguette Cut, 1.75 ct. pair.

Zn-Rich Spinel in Association with Quartz in the Al-Rich Metapelites from the Mashan Khondalite Series, NE China

Minerals, Free Full-Text

Blue Gahnite from Nigeria

The spatial distribution of the Al-rich lamellae bearing magnetite

Chemographic relations among högbomite (Hög), spinel (Spl)/Hercynite

a) Photomicrograph of large cordierite porphyroblast enclosing relics

Spinel: Red and blue gems confused with ruby and sapphire