Zircon U–Pb geochronology and heavy mineral composition of the Camaná Formation, southern Peru: Constraints on sediment provenance and uplift of the Coastal and Western Cordilleras

2015 ◽  
Vol 61 ◽  
pp. 14-32 ◽  
Author(s):  
Aldo Alván ◽  
Hilmar von Eynatten ◽  
István Dunkl ◽  
Axel Gerdes
2000 ◽  
Vol 79 (4) ◽  
pp. 373-380 ◽  
Author(s):  
D.J. Huisman ◽  
J.P. Weijers ◽  
L. Dijkshoorn ◽  
A. Veldkamp

AbstractWe investigated the spatial variability of the heavy-mineral composition in the Early Pleistocene fluviatile Kedichem Formation in the Netherlands in order to meet the demand for more information about subsurface sediment composition. We first determined the spatial extension and thickness of the sediment body, then used Fuzzy clustering techniques on a database containing approx. 2000 heavy-mineral counts from the Kedichem Formation to map the spatial extension of the various sediment provenances within the formation. Three clusters could be discerned, one representing a combined Meuse-Scheldt source, the other two representing a mixed Rhine-Baltic source. We made slice maps at several depths through the formation, and plotted the cluster memberships.The maps show an overall dominance of the Meuse-Scheldt source in the south of the Netherlands, whereas the Rhine-Baltic source occurs mainly in the central Netherlands. The methods employed show that it is possible to map and study the 3-D variation in heavy-mineral composition and hence sediment provenance in the Dutch subsurface with the use of simple statistical and visualization techniques.


Geologos ◽  
2015 ◽  
Vol 21 (4) ◽  
pp. 261-284 ◽  
Author(s):  
Małgorzata Ludwikowska-Kędzia ◽  
Halina Pawelec ◽  
Grzegorz Adamiec

AbstractThe identification of depositional conditions and stratigraphical position of glacigenic deposits in the Napęków area is important for the genetic and stratigraphical interpretation of Quaternary deposits in the central part of the Holy Cross Mountains, as well as for a revision of the course and extent of Middle Polish (Saalian) glaciations. These deposits comprise a series of diamictons which occur between sandy-gravelly deposits. Based on results of macro- and microscopic sedimentological investigations, analysis of heavy mineral composition, roundness and frosting of quartz grains, as well as OSL dating, this complex must have formed during the Odranian Glaciation (Drenthe, Saalian, MIS 6). Sandy-gravelly deposits are of fluvioglacial and melt-out origin. Diamictons represent subglacial traction till. Their facies diversity is a result of variations in time and space, complex processes of deposition and deformation, responsible for their formation at the base of the active ice sheet. This glacigenic depositional complex was transformed by erosion-denudation and aeolian processes in a periglacial environment during the Vistulian (Weichselian, MIS 5d-2).


2015 ◽  
Vol 34 (4) ◽  
pp. 41-55 ◽  
Author(s):  
Xiaofeng Liu ◽  
Daojun Zhang ◽  
Shikui Zhai ◽  
Xinyu Liu ◽  
Hongyan Chen ◽  
...  

2016 ◽  
Vol 20 (4) ◽  
pp. 449-462 ◽  
Author(s):  
Qingpeng Meng ◽  
Wen Zhang ◽  
Jing Zhang ◽  
Zhaoyu Zhang ◽  
Tairan Wu

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