Reclus, a new Database for Investigating the Tectonics of the Earth: an
Example from the East African Margin and Hinterland
Abstract
The open availability of global scientific databases is key to advancing
research of the Earth system and facilitating cross-disciplinary
studies. There are numerous datasets available for investigating
tectonics, but none that provide an internally consistent representation
of the structural framework, crustal architecture, and geodynamics. We
present Reclus, a suite of global, integrated databases that fill this
gap, thereby providing the community with the key components for
investigating the Earth system. Reclus includes databases of the
following: (1) structural elements, which define the three-dimensional
geometry of the rock volume, including folds and faults; (2) ‘crustal’
facies describing the geometry and composition/rheology of the
lithosphere; (3) igneous features; and (4) geodynamics, representing the
dominant thermo-mechanical processes acting on the lithosphere. These
databases and workflows are applied to East Africa to investigate the
geometry and heterogeneity of the margin and its hinterland. This margin
is often summarised in the literature as a ‘transform margin,’
represented by a single structural feature, the ‘Davie Fracture Zone’,
but it is much more complicated. We show how the pre-existing structure,
the superimposition of successive tectonic cycles, and crustal
heterogeneity dictate the complexity observed.