popupStructure_3AnalogModels_MagneticFabricDistr

Published: 10 September 2021| Version 1 | DOI: 10.17632/zs7n4t57k4.1
Contributor:
Thorben Schöfisch

Description

AMS (anisotropy of magnetic susceptibility) dataset of three analogue models simulating a development of a pop-up structure in a fold-and-thrust belt. For each sample, the location within the model is given (x,y, in local coordinate system). The dataset is divided into categories ("structure"), which are associated with the location and relation to a structure within the model, i.e., samples taken from the backthrusts ("bt"), forethrusts ("ft/kink"), forekink zones ("FKZ"), intersection of thrusts ("intersection"), or from areas away from thrusts and kinkzones ( >0.8 cm) (footwall beneath main backthrust next to backstop = "backstop" area; pop-up imbricate = "interlimb" zone; footwall in the model foreland = "foreland"; Model C: single samples from different parts in front of the pop-up structures and away from thrust/kinkzone are summarized as "compacted area"). For further information and illustration as well as numbering for certain labels, I refer to the following publication: 'Magnetic Fabric Signature within a Thrust Imbricate; an analogue modelling approach' by Schöfisch, T. et al. (in prep.)

Files

Steps to reproduce

- Mixing sand with magnetite (same size) and scraping layers of this mixed material within a sandbox; - shorten the model to simulate a development of a pop-up structure within a fold-and-thrust belt; - after shortening, wetting the model and taking samples for AMS measurements in MFK1-FA Kappabridge (Agico Inc.) using an AC field strength of 200 A/ m with a frequency of 976 Hz