TY - JOUR

T1 - Sapphires from the Sutara placer in the Russian far east

AU - Buravleva, Svetlana Yuryevna

AU - Smirnov, Sergey Zakharovich

AU - Pakhomova, Vera Alekseevna

AU - Fedoseev, Dmitrii Gennadyevich

PY - 2016/9/1

Y1 - 2016/9/1

N2 - From 2009 to 2011, sapphire crystals and corundum-bearing rocks were discovered at Sutara, in the Jewish Autonomous Region of the Russian Far East. These sapphires are typically translucent to semitransparent and blue to pinkish blue. Most of the crystals are heavily included and display prominent growth zoning, twinning planes, and abundant exsolution lamellae. Their primary fluid inclusions contain diaspore crystals and a lowdensity CO2-CH4 mixture. These inclusions indicate that sapphire mineralization occurred by means of low-density aqueous-carbonic fluids, which were able to carry significant concentrations of alumina. These fluids may have formed as a result of thermal impact of granitic magma on carbonate country rocks. The authors consider Sutara a metamorphic occurrence that formed as a result of diffusive and metasomatic processes at a region of contact between carbonate rocks and pegmatite veins.

AB - From 2009 to 2011, sapphire crystals and corundum-bearing rocks were discovered at Sutara, in the Jewish Autonomous Region of the Russian Far East. These sapphires are typically translucent to semitransparent and blue to pinkish blue. Most of the crystals are heavily included and display prominent growth zoning, twinning planes, and abundant exsolution lamellae. Their primary fluid inclusions contain diaspore crystals and a lowdensity CO2-CH4 mixture. These inclusions indicate that sapphire mineralization occurred by means of low-density aqueous-carbonic fluids, which were able to carry significant concentrations of alumina. These fluids may have formed as a result of thermal impact of granitic magma on carbonate country rocks. The authors consider Sutara a metamorphic occurrence that formed as a result of diffusive and metasomatic processes at a region of contact between carbonate rocks and pegmatite veins.

UR - http://www.scopus.com/inward/record.url?scp=84995639428&partnerID=8YFLogxK

U2 - 10.5741/GEMS.52.3.252

DO - 10.5741/GEMS.52.3.252

M3 - Article

AN - SCOPUS:84995639428

VL - 52

SP - 252

EP - 264

JO - Gems and Gemology

JF - Gems and Gemology

SN - 0016-626X

IS - 3

ER -