Coastal morphology and heavy mineral accumulation in an upper-macrotidal environment – A geological-mineralogical approach from source to trap site in a natural placer laboratory (Channel Islands, Great Britain)

Dill, Harald G.; Buzatu, A.; Balaban, Sorin-Ionuţ

doi:10.1016/j.oregeorev.2021.104311

Cited by 9 publications

(9 citation statements)

References 95 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The current study forms part of what was previously called a geoscientific terrain analysis, a methodological flow chart of which is illustrated in Figure 2 (Wilson and Gallant, 2000). In the current review, only the analytical work of the terrain analysis is addressed, and is highlighted in grey, whereas a complete overview of the terrain analysis can be found in [43].…”

Section: Methodsmentioning

confidence: 99%

“…Petrographic microscopy: Routine thin section analysis was carried out in combination with optical microscopy of heavy and light minerals with 200 to 300 grains counted per Flowchart to illustrate the pathway of a terrain analysis aimed at a paleoenvironmental analysis to be used as a platform for a basin analysis (modified from [43]). The territory shaded in grey attests to the analytical work forming the methodological platform of the current paper.…”

Section: R Peer Review 5 Of 59mentioning

confidence: 99%

“…Only fossiliferous forms can be touched and sampled after the retreat of the melting glacier or inland ice sheets of the glacial period in the periglacial area. Even a short glimpse at the map compiled by Lutgens et al [83] and Scotese [35] reveals that a great deal of the sampling sites in Central and North Europe are mixed-type landforms with relics of cryogenic origin being part of the geomorphological history of this region (Figures 1 and 6e,f) [36,43]. Isolated ice wedges in lower Triassic sandstones filled with debris from creep, and pockets in the bedrock of river channels filled with cryoturbated gravel, are relics typical of the last glacial period in Central Europe that had their center in northern Europe and on local isolated high-altitude summits derived from the uplifted Variscan Basement blocks and in the rising Alpine Mts.…”

Section: Cryogenic Processes and Their Landformsmentioning

confidence: 99%

“…They are separated from other fluvial catchment areas by a watershed and were established in a pre-existing landscape sculptured by fluvial and mass wasting processes leading to two end-member types (1) a plain type and (2) mountain type. They are often coupled with relic landforms that developed under completely different climates and sometimes different states of geomorphological-geodynamic maturity [43,102].…”

Section: Fluvial Processes and Their Landformsmentioning

confidence: 99%

“…The wide-angle valleys are dominated by unconfined sheet-floods and ephemeral streams such as the Kuiseb (Figure 7a) [108]. Renewed incision starts with dendritic multiple or single channels straight to low-sinuosity drainage systems when the area becomes uplifted or a more humid climatic regime comes into existence [43].…”

Section: Fluvial Processes and Their Landformsmentioning

confidence: 99%

See 4 more Smart Citations

Trends and Composition—A Sedimentological-Chemical-Mineralogical Approach to Constrain the Origin of Quaternary Deposits and Landforms—From a Review to a Manual

Dill

2022

Geosciences

Self Cite

View full text Add to dashboard Cite

In this study, six basic Quaternary landform series (LFS) and their sedimentary deposits (LFS1 aeolian, LFS 2.1 to 2.2 mass wasting, LFS 3 cryogenic-glacial, LFS 4.1 to 4.6 fluvial, LFS 5.1 to 5.2 coastal-marine, LFS 6.1 to 6.3 lacustrine) are subdivided into subtypes and examined with regard to their sedimentological parameters and their mineralogical and chemical compositions. Emphasis is placed on the textural (related to transport and deposition), compositional (sediment load/weight, Eh and pH) and geodynamic maturity of the sedimentary deposits which are influenced by the parent lithology and bedrock tectonic and by the climate during the last 2 Ma. To constrain the development of the LFS and their sediments, composite trend-line diagrams are designed combining sedimentological (x-axis) and chemical/mineralogical dataset (y-axis): (1) sorting vs. heavy mineral content; (2) sphericity of grains vs. silica/carbonate contents; and (3) median vs. Ti/Fe ratios. In addition, the x-y plots showing the log SiO2/Al2O3 vs. log Na2O/K2O are amended by a dataset of the three most common clay minerals, i.e., kaolinite-, mica-, and smectite-group clay minerals. Such joint sedimentological-chemical-mineralogical investigations focused on the depositional environment of unconsolidated clastic sediments of Quaternary age can be used to describe the economic geology and environmental geology of mineral deposits in the pre-Quaternary sedimentary series according to the phrase: “The Present is the key to the Past”. Both trend diagrams and compositional x-y plots can contribute to constraining the development of the full transect of landform series from the fluvial incision and slope retreat to reef islands fringing the coastal zone towards the open sea as far as they are built up of clastic sedimentary deposits enriched in siliceous and/or carbonate minerals. Climate zonation and crustal maturity are the exogenous and endogenous “drivers”, as can be deduced from the compositional (mineralogy and chemistry) and physical (transport and deposition) variations observed in the Quaternary sediments. The current study bridges the gap between a review only based on literature and a hybrid manual generated by practical field studies devoted to applied geosciences in economic and environmental geology (“E & E issue”).

show abstract

Section: Methodsmentioning

confidence: 99%

Section: R Peer Review 5 Of 59mentioning

confidence: 99%