Quartz, garnet, and other detrital
minerals were subjected to corrosion and even dissolution (Kleesment & Paap 1978; Kleesment 1984).
Micromorphological features, including the fine crystalline nature of the calcite, which indiscriminately coats detrital
grains, suggest that the accumulation of calcite in the k phase of each of the dunes is the result of a re-distribution of deposited calcium carbonate.
In this respect, two different genetic groups are categorized: detrital
The similarity of the detrital
zircon age spectrum in a quartz sandstone sample from the central part of the Horton Group on Petit-de-Grat Island to ages of Devonian and Neoproterozoic igneous units in the Mira terrane of southeastern Cape Breton Island suggests that those rocks provided much of the detritus in the group, including the abundant felsic volcanic clasts in the thick middle part of the conglomerate-dominated Horton Group sequence in the Isle Madame area.
Relative content of minerals, % Detrital
material of terrigenous origin Q Fs Pl Quartz Potassic Plagioclases feldspars 11-1 37 6 7 11-16 35 5 6 11-24 29 3 8 11-44 35 6 8 11-56 25 7 7 11-93 32 6 7 Average 32 6 7 45 Sample No.
Sample NB027A for detrital
zircon analysis was collected from the Lower Ordovician Lumsden Dam Formation in the overflow channel at Lumsden Dam [20T 0389877 4986952] (Fig.
238]U age populations of the detrital
zircon grains from samples VKT, VLN and VLK.
Anoxic sediment resuspension (for instance, by bioturbation) or degradation of detrital
organic matter after a phytoplankton bloom could consume quantitatively the remaining oxygen present in sediment, and particularly that contained in iron (hydr)oxides, leading to a quick release of DRP in overlying water (Palmer-Felgate et al.
The mineralogical data, characterised by detrital
kaolinite and autochthonous pyrite, corroborate the post-burial pedogenesis theory.
Proportionally enhanced suspension of inorganic silt commonly leads to reduced organic content of the total available matter in turbid waters with the greatest seston loads, when detrital
organics are typically most dominant (Hawkins et al.
5) Some contaminants end up in fecal pellets and other detrital
particles that settle to the seafloor and accumulate in sediments.
2] cannot have been introduced into the original sediment in aluminosilicate phases and was probably therefore either in traces of detrital
quartz or in siliceous organisms.