The topographic height of orogenic mountains is related to the principle of isostasy, that is, a balance of the downward gravitational force upon an upthrust mountain range (composed of light, continental crust material) and the buoyant upward forces exerted by the dense underlying mantle.
TY - JOURT1 - Dating shear zones with plastically deformed titanite: New insights into the orogenic evolution and ore remobilization history of the Sudbury impact structure (Ontario, Canada)AU - Papapavlou, Konstantinos AU - Darling, James AU - Storey, Craig AU - Lightfoot, Peter AU - Moser, D. AU - Lasalle, Stephanie PY - 2017/1/9Y1 - 2017/1/9N2 - The Sudbury structure is a mineralized impact crater that hosts different families of ore-controlling shear zones with poorly known orogenic affinities.
The application of Illite Age Analysis (IAA) to fault rocks has the benefit that very small sample volumes can be analyzed, that potassium and argon are measured simultaneously, and that it has high precision.
In pre-drift reconstructions, the central and southern parts of the Borborema Province, northeastern Brazil, belong to a large Brasiliano-Pan-African orogenic realm situated to the north of the São Francisco-Congo Craton.
The position of the landmass that would become the eastern United States and northern Europe remained equatorial,...
Laurussia and Gondwana became fused by the Appalachian- Hercynian orogeny (mountain-building event), which continued into the Permian Period.
The batholith is exposed at the surface at several places including Dartmoor and Bodmin Moor.
There was intense folding, such as that at Hartland Quay, North Devon; and Millook Haven in Cornwall; along with folding of the South Wales coal fields.
Orogenic belts are associated with subduction zones, which consume crust, produce volcanoes, and build island arcs.
Geologists attribute the arcuate structure to the rigidity of the descending plate, and island arc cusps relate to tears in the descending lithosphere.