A5013889588- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Geology and Paleoclimatology Research
- earthquake and tectonic studies
- Paleontology and Stratigraphy of Fossils
- Geochemistry and Geologic Mapping
- Geological Studies and Exploration
- Geochemistry and Elemental Analysis
- Clay minerals and soil interactions
- Geological formations and processes
- Radioactive element chemistry and processing
- Mine drainage and remediation techniques
- Cryospheric studies and observations
- Mineral Processing and Grinding
Geological Survey of Finland
2023-2024
University of Helsinki
2019
University of Iceland
2017-2018
Nordic Cancer Union
2017
We present new high-precision major and trace element data on olivine macrocrysts from various volcano-tectonic settings in Iceland use these as a proxy for mantle mode melting conditions. Within individual sampling sites examined (seven lavas one tephra) olivine-dominated fractional crystallization, magma mixing diffusive re-equilibration control observed variability composition. High-pressure crystallization of clinopyroxene may have lowered Ca increased Fe/Mn population subsolidus...
In the formerly glaciated terrains in northern hemisphere and countries such as Finland, till is most common sediment covering bedrock. Specifically, indicator or heavy mineral studies utilising a vector for deposits undercover have been successful. The pyrite trace-element composition from situ analyses has shown to be an effective discriminator between different deposit types, this led research using identify potential given area. However, easily oxidised beds, thus, alternative methods...
Geochemical anomalies and indicator mineral studies in glacial sediments are commonly used to define exploration targets glaciated areas. Trace element composition of sediment-hosted heavy minerals, such as pyrite chalcopyrite, can be potentially fingerprint deposits. This study presents results from trace compositions the concentrates till mineralized bedrock samples orogenic gold ore occurrences Petäjäselkä area, Central Lapland belt, northern Finland. The contents grains were evaluated by...
Our understanding of the long-term intrusive and eruptive behaviour volcanic systems is hampered by a relatively short period direct observation. To probe conditions crustal magma storage below South Iceland, we have analysed compositions minerals, mineral zoning patterns, melt inclusions from two Eyjafjallajökull ankaramites located at Brattaskjól Hvammsmúli. These units are rich in compositionally diverse macrocrysts, including most magnesian olivine (Fo$_{88−90}$) clinopyroxene...
Abstract To gain insights into crystal–melt separation processes during basalt differentiation, we have studied an 8-m-thick pāhoehoe lava lobe from the Hafnarhraun flow field in SW Iceland. The has abundant melt segregations, porous cylindrical and sheet-like structures, generally interpreted as separated residual melts of a lobe. We divide these segregations three types based on morphology composition: vesicle cylinders (VC), type 1 horizontal sheets (HVS1), 2 (HVS2). Remarkably, VC are...
U-Pb zircon single grain dating using the LA-MC-ICP-MS technique was utilized to determine age of host rocks Juomasuo Au-Co-Cu deposit located in late Archean Kuusamo supracrustal belt.Even though dated samples have diverse geochemical signatures that imply felsic volcanic and sedimentary precursors, data revealed heterogeneous detrital populations for all samples.The are thus considered belong reworked sedimentary/volcano-sedimentary sequences.The maximun depositional ages fall 2.75-2.65 Ga...