Pulverized limonite ore from a Pleistocene–Quaternary lake deposit and compact limonite ore from the Olistostrome member of the Javorik fl ysch formation, in the Southern Tomašica iron ore deposit, were investigated and compared with different types of siderite and ankerite, limestone and carbonate shale from the same location in order to determine their possible protolith. Two limonite types d...

The Huanggang deposit is the most important and largest skarn Fe–Sn polymetallic in Southern Great Xing’an Range of Northeast China. Cassiterite, magnetite, other metal minerals are related to garnets within systems. zoned from various stages able record numerous geological mineralizing processes including variations physicochemical conditions hydrothermal fluid evolution. In this contribution,...

We explored how phosphorus (P) availability influences accumulation of rare earth elements (REE) in plant species with different P-acquisition strategies beyond the commonly REE-phosphate precipitation. Two P-efficient carboxylate-releasing lupin (Lupinus albus, and L. cosentinii) four less carboxylate release under P-deficiency (Triticum aestivum, Brassica napus, Pisum sativum, Cicer arietinum...

Abstract The Doldrums Megatransform System (~7–8°N, Mid-Atlantic Ridge) shows a complex architecture including four intra-transform ridge segments bounded by five active transform faults. Lower crustal rocks are exposed along the and Vernadsky walls that bound northernmost segment. recovered gabbros characterized variably evolved chemical compositions, ranging from olivine to gabbronorites oxid...

In situ major, trace and rare-earth element composition of Ti-rich garnets from Ambadungar-Saidivasan alkaline carbonatite complex (ASACC) are presented to constrain its likely genesis. The characterized by high andradite (42.7–57.3), schorolomite (22.0–31.0), morimotoite (15.6–26.5) end members. No distinct chemical zonation is noticed except for minor variations in Ti content. enriched LREE (...

Mineral inclusions in pyrope crystals from Garnet Ridge in the Navajo Volcanic Field on the Colorado Plateau are investigated in this study with emphasis on the oxide minerals. Each pyrope crystal is roughly uniform in composition except for di€usion halos surrounding some inclusions. The pyrope crystals have near constant Ca:Fe:Mg ratios, 0.3 to 5.7 wt% Cr2O3, and 20 to 220 ppm H2O. Thermobaro...

Introduction: In the course of the systematic study on refractory inclusions in the Ningqiang meteorite [1], ion microprobe analyses of rare earth elements (REEs) have been performed and correlated positive anomalies in Ce (+Eu) +Yb have been found in some inclusions [2, 3]. Two different patterns are recognized: one is HREE-depleted patterns with positive anomalies in Ce +Eu +Yb (named as modi...

Abstract The origin and evolution of subcontinental lithospheric mantle (SCLM) are important issues Earth’s chemical physical evolution. Here, we report detailed textural analyses on a xenolith suite from Befang (Oku Volcanic Group, Cameroon Line), which represents major tectono-magmatic structure the African plate. samples sourced spinel-facies dominated by lherzolites. Their texture is catacl...