TY - JOUR

T1 - Kuliginite, a new hydroxychloride mineral from the Udachnaya kimberlite pipe, Yakutia

T2 - Implications for low-temperature hydrothermal alteration of the kimberlites

AU - Mikhailenko, Denis S.

AU - Korsakov, Andrey V.

AU - Rashchenko, Sergey V.

AU - Seryotkin, Yurii V.

AU - Belakovskiy, Dmitriy I.

AU - Golovin, Alexander V.

PY - 2018/9/25

Y1 - 2018/9/25

N2 - Kuliginite is a new iron-magnesium hydroxychloride mineral with the ideal formula Fe3Mg(OH)6Cl2 from the Udachnaya East kimberlite, Yakutia, Russia. It occurs as green prismatic-bipyramidal crystals (0.2-0.5 mm) and fills cavities and veins in several units of kimberlites together with iowaite, gypsum, calcite, halite, barite, and celestine. It is trigonal, with R3 space group. Kuliginite has imperfect cleavage on {1011}. The spinel-like crystal structure of kuliginite is also typical for several copper minerals of the atacamite group with common formula Cu3M(OH)6Cl2; kuliginite can be regarded as a Fe2+ analog of tondiite [Cu3Mg(OH)6Cl2. The occurrence of the kuliginite + iowaite + gypsum assemblage has implications for the interpretation of low-temperature (below 100°C) hydrothermal processes and alteration of kimberlite by hydrothermal fluids/brines, as well as for transport of metals in Cl-bearing solutions. This secondary hydrothermal mineral assemblage formed much later than the kimberlite groundmass minerals. Kuliginite contains inclusions of iowaite indicating their simultaneous crystallization.

AB - Kuliginite is a new iron-magnesium hydroxychloride mineral with the ideal formula Fe3Mg(OH)6Cl2 from the Udachnaya East kimberlite, Yakutia, Russia. It occurs as green prismatic-bipyramidal crystals (0.2-0.5 mm) and fills cavities and veins in several units of kimberlites together with iowaite, gypsum, calcite, halite, barite, and celestine. It is trigonal, with R3 space group. Kuliginite has imperfect cleavage on {1011}. The spinel-like crystal structure of kuliginite is also typical for several copper minerals of the atacamite group with common formula Cu3M(OH)6Cl2; kuliginite can be regarded as a Fe2+ analog of tondiite [Cu3Mg(OH)6Cl2. The occurrence of the kuliginite + iowaite + gypsum assemblage has implications for the interpretation of low-temperature (below 100°C) hydrothermal processes and alteration of kimberlite by hydrothermal fluids/brines, as well as for transport of metals in Cl-bearing solutions. This secondary hydrothermal mineral assemblage formed much later than the kimberlite groundmass minerals. Kuliginite contains inclusions of iowaite indicating their simultaneous crystallization.

KW - atacamite group

KW - crystal structure

KW - Dynamics of Magmatic Processes

KW - hydroxychloride

KW - kimberlite

KW - kuliginite

KW - New mineral

KW - EAST KIMBERLITE

KW - CARBONATES

KW - KAPELLASITE

KW - ANALOG

KW - ALKALI CHLORIDES

KW - CRYSTAL-STRUCTURES

KW - UNALTERED KIMBERLITES

KW - MELT INCLUSIONS

KW - MAGMA EVOLUTION

KW - OLIVINE

UR - http://www.scopus.com/inward/record.url?scp=85053328558&partnerID=8YFLogxK

U2 - 10.2138/am-2018-6363

DO - 10.2138/am-2018-6363

M3 - Article

AN - SCOPUS:85053328558

VL - 103

SP - 1435

EP - 1444

JO - American Mineralogist

JF - American Mineralogist

SN - 0003-004X

IS - 9

ER -