1-5: Literature Flashcards
What two variables did (authors) find χlf to be a good proxy for in the Lac d’Annecy, French Alpine catchment?
(Foster et al, 2003) Discharge and rainfall
How many soil groups were determined in the study by Foster et al 2003?
Four from different regions of the catchment
(authors) determined that the abundance of secondary ferrimagnetic minerals is controlled by ___ and ___ in the Lac d’Annecy catchment.
(Foster et al, 2003) Microclimate and drainage
What was the determining source of sediment during winter and spring related to high haematite and goethite concentrations by (Authors) in the Lac d’Annecy catchment?
(Foster et al, 2003) Snowmelt from upper mountain/sub-alpine regions
(Authors)(Site Location) Name two depths which most strongly correlate to soil group 1: abundance of fine-magnetite (soft) SD grains and SP grains, very few paramagnetic grains.
(Foster et al, 2003)(Lac d’Annecy) 34cm, 40cm, 17cm, 44cm
(Authors)(Site Location) Name two depths which most strongly correlate to group 2: SSD and MD ferimagnetic minerals, with a large antiferromagnetic component. Low abundance of paramagnetic minerals, and a lack of SP grains.
(Foster et al, 2003)(Lac d’Annecy) 4cm, 16cm, 28cm, 32cm, 47cm
(Authors)(Site Location) Explain what the magnetic mineralogy is like at 16cm depth (3 main points)
(Foster et al, 2003)(Lac d’Annecy)(1) 0%χfd = no SP grains. (2) high susceptibility, mirrored in soft% = abundance of magnetite. (3) Higher % of haematite than goethite, but still relatively low compared to magnetite
(Authors) found a strong SSD signal in the lake sediments of Lac d’Annecy caused by what?
(Dearing et al, 2001) Bacterial magnetiosomes
What did (Authors) find had happened to the upper alpine limestone regions over the past 6000 years in the Lac d’Annecy catchment and how was this determined?
(Dearing et al, 2001) Steady increase in erosion, determined by the increasing presence of hard magnetic minerals in the lake sediments
What did both (Authors and Authors) find to be the magnetic signal of the upper bare limestone catchment?
(Dearing et al, 2001 and Foster et al, 2003) Higher goethite and haematite (antiferromagnetic components) from limestone sources
Peaks in %SOFT indicate ______ where as peaks in %HARD indicate _____ (Authors) at Lac d’Annecy
Flood events which effect the lower lying regions, Storm events in upper regions from high erosion rates (Thorndycraft et al, 1998)
According to (Authors and Authors) how are most of the secondary ferrimagnetic minerals (SFM’s) being formed at Lac d’Annecy?
(Dearing et al, 2001 and Foster et al, 2003) pedogenic enhancement
According to (Authors) what is the magnetic signature of secondary ferrimagnetic minerals (SFM’s)?
(Foster et al, 2003) peak in SFM is found from a peak in %χfd
What was the purpose of the study by Royall (2001)?
To determine changes in magnetic properties over a hill slope
Which study determined higher abundance of magnetic material on the hill slopes rather than the valley bottom as predicted?
Royall (2001)
