This study presents geochemical and fabric analysis of coarse-grained, porphyroclastic and myloni... more This study presents geochemical and fabric analysis of coarse-grained, porphyroclastic and mylonitic spinel peridotite xenoliths derived from the shallow subcontinental lithospheric mantle of Jeju Island (South Korea). Fabric analysis of olivines in the studied peridotites shows activation of the high temperature (010)[100] slip system; however, in the porphyroclastic and mylonitic peridotites, activation of (0kl)[100] slip system results in a weaker fabric.
Abstract This study provides a continuous lateglacial and Holocene record of diatom silica oxygen... more Abstract This study provides a continuous lateglacial and Holocene record of diatom silica oxygen isotope changes (δ 18 O DIAT) in a subalpine lake sediment sequence obtained from the Retezat Mts (Taul dintre Brazi, 1740 m asl). This through-flow, shallow, high-altitude lake with a surface area of only 0.4 ha has short water residence time and is predominantly fed by snowmelt and rainwater.
Abstract There are four ways by which OH− commonly substitutes into olivine, namely those associa... more Abstract There are four ways by which OH− commonly substitutes into olivine, namely those associated with (1) Si vacancies,(2) Mg vacancies,(3) Ti, or (4) trivalent cations. The four mechanisms, which we label [Si],[Mg],[Ti], and [triv], respectively, may each be fingerprinted by their characteristic OH stretching modes in the infrared spectrum.
Peridotite xenoliths showing unusual tabular equigranular textures (addressed as flattened tabula... more Peridotite xenoliths showing unusual tabular equigranular textures (addressed as flattened tabular equigranular) were found in Neogene alkali basalts from the Bakony-Balaton Highland Volcanic Field (Western Hungary), Carpathian-Pannonian Region. The olivines have a characteristic crystallographic preferred orientation (CPO) with [010]-axes perpendicular to the foliation and the [100]-and [001]-axes forming a continuous girdle in the foliation plane.
This study presents geochemical and fabric analysis of coarse-grained, porphyroclastic and myloni... more This study presents geochemical and fabric analysis of coarse-grained, porphyroclastic and mylonitic spinel peridotite xenoliths derived from the shallow subcontinental lithospheric mantle of Jeju Island (South Korea). Fabric analysis of olivines in the studied peridotites shows activation of the high temperature (010)[100] slip system; however, in the porphyroclastic and mylonitic peridotites, activation of (0kl)[100] slip system results in a weaker fabric.
Abstract This study provides a continuous lateglacial and Holocene record of diatom silica oxygen... more Abstract This study provides a continuous lateglacial and Holocene record of diatom silica oxygen isotope changes (δ 18 O DIAT) in a subalpine lake sediment sequence obtained from the Retezat Mts (Taul dintre Brazi, 1740 m asl). This through-flow, shallow, high-altitude lake with a surface area of only 0.4 ha has short water residence time and is predominantly fed by snowmelt and rainwater.
Abstract There are four ways by which OH− commonly substitutes into olivine, namely those associa... more Abstract There are four ways by which OH− commonly substitutes into olivine, namely those associated with (1) Si vacancies,(2) Mg vacancies,(3) Ti, or (4) trivalent cations. The four mechanisms, which we label [Si],[Mg],[Ti], and [triv], respectively, may each be fingerprinted by their characteristic OH stretching modes in the infrared spectrum.
Peridotite xenoliths showing unusual tabular equigranular textures (addressed as flattened tabula... more Peridotite xenoliths showing unusual tabular equigranular textures (addressed as flattened tabular equigranular) were found in Neogene alkali basalts from the Bakony-Balaton Highland Volcanic Field (Western Hungary), Carpathian-Pannonian Region. The olivines have a characteristic crystallographic preferred orientation (CPO) with [010]-axes perpendicular to the foliation and the [100]-and [001]-axes forming a continuous girdle in the foliation plane.
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Papers by Istvan Kovacs