Andrius Rimsa

• PhD
• Founder at Loxus Consulting AB

"In Scandinavia and worldwide, rock tunnels are largely used to transport water in many industries and municipal activities, e.g. hydro and nuclear power, water transport for drinking and wastewater, raw water supply to industrial facilities, etc. These tunnels are usually constantly filled with water but need monitoring and maintenance inspections...

A Mid-Lithuanian Domain (MLD) was distinguished by Bogdanova et al. (2015) as part of the large Mid-Baltic Belt (MBB) in the western East European Craton. Zircon U-Pb dating by SIMS, Sr- and Nd-isotope systematics and a detailed geochemical study have allowed to subdivide the MLD into two parts: NW and SE. The NW magmatic rocks have been emplaced a...

Bergtunnlar används i stor utsträckning till att transportera vatten i många industrier och kommunala verksamheter t.ex. vatten-och kärnkraft, vattenverk för dricks-och avloppsvatten, råvattenförsörjning till industrianläggningar etc. Dessa tunnlar är oftast konstant vattenfyllda men behöver övervakning och underhållsinspektioner med jämna mellanru...

The aim of this study is to determine the age of an intermediate volcanic rock that occurs at Sammakkovaara, 24 km east of the world-class Aitik ore deposit in the north-eastern part of the map area 27K Nattavaara in Norrbotten County (Fig. 1–3). The result would increase the knowledge of the volcanic stratigraphy in the area and furthermore, age d...

Norrbotten, Sweden is a key area of Europe for future exploration and mining. To establish age relations for magmatic activity and metamorphic overprinting in this area, the sampled rock was selected (Fig. 1, 2, 8). The volcanogenic rocks in the western part of map area 27K Nattavaara NV are seen to continue north from interpretation of the geophys...

Strongly deformed, recrystallised granite occurs at Kaltisberget in the southwestern part of the map area 27K Nattavaara SV in Norrbotten County (Fig. 30). It is evident from the geophysical data that this type of rock is present in large areas west and south of map area 27K Nattavaara SV (Fig. 1, 2). The purpose of this study was to determine the...

Zircon crystals from a locally charnockitized Paleoproterozoic high-K metagranite from the Kerala Khondalite Belt (KKB) of southern India have been investigated by high-spatial resolution secondary ion mass spectrometry analysis of U–Th–Pb and rare earth elements (REE), together with scanning ion imaging and scanning ion tomography (depth-profiled...

http://resource.sgu.se/produkter/sgurapp/s1016-rapport.pdf

The Palaeoproterozoic Malmbäck Formation in southern Sweden comprises mafic to felsic volcanic rocks and syn-eruptive volcaniclastic and volcanogenic sedimentary deposits. Field observations indicate terrestrial to fluvial deposits – predominantly with massive to highly vesicular lavas, but also with ignimbrites, ashes, redeposited volcanic rocks a...

Geochemistry and Sr-Nd isotope geochemistry of ca. 1.8 Ga, mafic intrusions of the Transscandinavian Igneous Belt (TIB-1) in the Fennoscandian shield were studied in southeastern Sweden. These rocks show LILE-LREE-enriched, HFSE-depleted, calc-alkaline, continental arc signatures in the north, grading to slightly less enriched, oceanic affinities s...

We present high spatial resolution ion-microprobe U–Th–Pb geochronology and rare earth element (REE) data combined with cathodoluminescence (CL) and back-scattered electron (BSE) imaging for complex zircons in incipient charnockites from Söndrum, SW Sweden. Examination of closely paired samples across the dehydration zone demonstrates that incipien...

Several subcropping anorthosite–mangerite–charnockite–granite (AMCG) plutonic suites are aligned along E–W trending lineaments in the Lithuanian part of the East European Craton. The Rukai quartz monzodiorite from the Nemunas suite yields a zircon U–Pb intrusion age of 1447 ± 5 Ma, and the Geluva granite an age of 1445 ± 8 Ma, both obtained using s...

The entire population of magmatic oscillatory zoned zircons in a migmatitic granite from the Tjarnesjo intrusion, southwest Sweden, reveal fine-scale brittle fracturing. The oscillatory zoned fragments are rotated but not dispersed. Fractures between individual fragments are sealed by newly formed CL-bright zircon. Hydraulic fracturing is the most...

The Palaeoproterozoic crust and upper mantle in the region between the Ukrainian and Baltic shields of the East European Craton were built up finally during collision of the previously independent Fennoscandian and Sarmatian crustal segments at c.

The Karlshamn pluton is one of the numerous intrusions of Mesoproterozoic granitoids known from the area around the southern Baltic Sea. It consists mostly of coarse-grained, K-feldspar megaporphyritic, very high-K calc-alkaline, marginally metaluminous monzonites to granites with rapakivi and anti-rapakivi textures. The western and eastern parts o...