KJERNEPRØVE

NGUs borkjerne database inneholder opplysninger om forekomst og lagringssted for alle borkjerner ved Geodatasenter Løkken. Systemet er laget ved hjelp av relasjonsdatabaseverktøyet ORACLE. Det kjører som enbrukerversjon på PC under MS-DOS og er installert ved NGUs Geodatasenter på Løkken i Meldal. Databasen inneholder registreringer for hvor borkjernen er tatt med henvisning til forekomst og med evt. koordinatangivelse. H.o.h., retning, lengde, helning og diameter kan registreres. Lagringsopplysningene omfatter hvilken kasse, palle og reol hvor prøven er lagret. Databasen har også plass til lagring av borhistorie og borkjernelogg. Alle data er søkbare og databasen oppdateres i sanntid. Fra databasen kan det produseres to typer skriftlige rapporter: Rapport for en bestemt forekomst og en katalog over alle forekomster i data- basen. Rutiner for sikkerhetskopiering er beskrevet. Siste del av rapporten er en teknisk systembeskrivelse av databasen.

Fives lakes in Ørsta, Volda and Nordfjordeid communes are mapped using a
Knudsen 320 M/P 12 Khz echo-sounder. From the echo-sounding profiles there
are made maps for the lakes.
The acoustic profiles are interpreted at NGU with regard to disturbances of
the lake-sediments - like slides or tectonic shaking. Slides are registered in
all lakes. In four of the lakes these slides may have been generated from steep
slopes surrounding the lakes, while in the fifth - Storesetervatnet in Nord-
fjordeid - the disturbances seen, have happened entirely within the lake
sediments themselves. Based on the interpretation, we suggest a coring program
covering all five lakes to verify the genesis of these disturbances and to date
them. Adjustment to the program must be expected during coring when seismic
data and cores can be related.

A project was begun in cooperation with NGU, Norsk Hydro, the University of
Bergen and the Sogn & Fjordane College with the aim to study regional slide
events and interpret triggering factors for such slides. The project involves
intrpretation of pre-existing and new seismic reflection profiles and multi-
beam-echosounder data and a large scale sampling program to analyse Quaternary
fjord sediments.

This report contains data from core logging of seven drill cores from boreholes at Åknes rockslide area, Stranda municipality, western Norway. Four boreholes were drilled in 2005 and the remaining three in 2006. Raw data from the core logging are compiled, without any interpretation. Graphs of fracture frequency (FF) and RQD from the logging are presented and compared from the different drill sites.

Samples are collected from the drill cores and recorded in the logs. Method descriptions for the sample analysis are described in the report. Samples of standard engineering testing, such as UCS, E-Module, Poisson's ratio, Brazil test and sound velocity, are performed after standard ISRM methods, and some results are included in the report.

The study is based on over 1000 analysed drill core samples, drilled before 2007, from the Nussir copper deposit in Kvalsund in Finnmark, Northern Norway. The scope of the study was to find any correlations among the metals and eventually any metal zonations.
Several conclusions can be drawn from the study of chemical composition of the drill cores. However, some of them are indicative and should be confrimed by further analyses, re-logging of the drill cores and mineralogical studies.
Analyses of acid-soluble digestions show the metal distributions as well as give indications of lithologies present. There is, to a varying degree, a positive correlation between Cu and Ag, S, As, Co, Au and Fe. The enrichments of other transitions metals than Cu are limited.
High Cu-values are found both within and in the footwall of the assumed "ore dolomite" zone. Actually, the highest Cu-values commonly occur in the footwall of the dolomite. The ore dolomite is best defined in the western part of the deposit, and the Cu-mineralisations occur in less dolomitic rocks in the eastern part. The core length of the Cu-mineralised zone is, in several sections, several meters, up to 8-9 m when the cut-off is taken as 0.25% Cu.
The relationship between Cu, Fe and S can be used to give indications on both lateral and vertical zonation of different copper minerals. The highest proportions of the Cu-rich sulphides, bornite and chalcocite/digenite, occur in the westernmost and in the eastern parts of the deposit. The highest Ag values are found in chalcopyrite-rich samples in the folded part of the deposit. Further studies are needed to verify whether this zonation and Ag distribution are a primary feature or due to later remobilisation.
The host rocks of the two Cu-mineralised zones in the westernmost part of the area have different chemical composition. The chemical characteristics of the lower Cu-zone, which includes enrichment of Pt, are only found in drill hole Bh 60.

I tidsrommet 1976-1978 ble store deler av Barentshavet mellom Norge og Svalbard prøvetatt i forbindelse med petroleumsprospektering. Prøvetakingen ble utført i regi av Oljedirektoratet. Det ble til sammen tatt 1065 kjerner med gravitasjonsprøvetaker.
Førtifire kjerner (enten hele kjerner eller seksjoner av kjerner) er undersøkt og beskrevet i denne rapporten. Prøvene var tidligere lagret hos Oljedirektoratet i nesten 30 år før de ble transportert til NGUs lager på Løkken. En stor del av de undersøkte kjernene viste seg å være av bra kvalitet.
Resultatene av røntgenfotografering og kjernebeskrivelse er vist i tabeller og figurer.

The steady increase in concentration of CO2 in the atmosphere owing to combustion of hydrocarbons is considered a major factor contributing to global warming. Storage of CO2 as subcritical gas in depleted oil and gas reservoirs and deep aquifers is considered a viable mitigation for reducing the impact of global temperature increase as a consequence of increased atmospheric CO2 (Hitcheon 1999, Bachu 2008).
More knowledge is needed to be able to assess:
- the quantity of CO2 trapped as minerals during CO2 storage
- the amounts of major and trace elements which might be mobilized as ions during CO2 storage, and
- how the mechanical strength of different reservoir rocks might be affected during storage of CO2.

A number of carbonate occurrences in the Evenes and Rolla areas, in Nordland and Troms County respectively, contain calcium carbonate with low content of crystal-bound iron and manganese. The calcite in such rocks has potentially high whiteness, and the rock might be suitable for production of high-purity calcite products (such as GCC). Short core boreholes have been drilled to provide continuous samples from four localities in the Evenes area and five loalities at Rolla.

På tokt MAREANO 2014-2016 med forskningsfartøyet G.O. Sars i 2014 ble det tatt sedimentkjerner med gravitasjonsprøvetaker (GC) på åtte stasjoner i Barentshavet Øst. Hensikten var i første rekke å få informasjon om mektighet av sedimenter avsatt i holocen (de siste ca. 11 500 år før nåtid), og få informasjon om de underliggende sedimentene avsatt i kontakt med isdekket eller sedimentert under kaldere forhold like etter at isdekket forsvant. I tillegg til å gi en bedre forståelse av dannelsen av det øverste holocene sedimentlaget, som på seismikk vanligvis fremtrer som akustisk lysere enn de underliggende sedimentene, gir kjernen bakgrunnsdata for å evaluere avsetningrater og miljøgeokjemi i de øverste ca. 20 cm av sedimentkjerner tatt med multicorer (MC).