Argillite - an overview | ScienceDirect Topics The mélange argillite matrix has yielded Lower Eocene fossils, but also with reworked Upper Cretaceous coccoliths (Tan, 1979) The following forams indicate a Lower Eocene age: Ammodiscus sp Bolivina sp ; Praeglobolulimina pupoides (d'Orbigny); Globigerina gravelli Bronnimann and Globigerina linaperta Finlay
Argillite - an overview | ScienceDirect Topics The range of K Z-hydraulic (K Z determined using hydraulic methods) at the same formation and in the same area can be as wide as seven orders of magnitude (see Otway Basin, Australia and Toarcian argillite, France, in Fig 2 and Table 2), whereas the range of K Z-chemistry (K Z determined applying Darcy’s Law using V estimated with chemical
Curing temperature’s effect on argillite-metakaolin based geopolymer . . . For the argillite-based formulations the intensity ratio is lower than 1, emphasizing once again the greater reactivity of the argillite at 80 °C compared to 20 °C These findings highlight the neglectable impact storage temperature on metakaolin-based formulation, in term of structure and physicochemical properties
Experimental investigation on the effects of confining pressure and . . . Argillite is a complex heterogeneous material, in which the initial state (e g , micro-fissures and cracks) and the orientation of these features has a significant impact on gas transport properties In addition, the clay-water interaction during saturation results in adsorption swelling, further changing the microstructure of the material
Sedimentary Geology and Stromatolites of the Middle . . . - ScienceDirect The Appekunny Argillite is ∼700 m thick, consists largely of green-colored, fine-grained terrigenous material and appears to have been deposited predominantly in offshore and or deltaic settings The overlying Grinnell Argillite is 605 m thick and consists of red-colored terrigenous material deposited largely on an alluvial plain
Evolution of the elastic properties of a bedded argillite damaged in . . . Argillite is one of the most common engineering rocks in the construction of express ways in southeast Guizhou, China, where is a region having countless mountains As an important host rock, argillite is unavoidable to be influenced in its mechanical properties by the damage effects aforementioned
Coupled THMC models for bentonite in an argillite repository for . . . This is of particular importance for an argillite repository, because argillite has relatively lower heat conductivity All disposal concepts throughout the world, despite their differences in design concepts, commonly impose an upper temperature limit of about 100 °C ( Hicks et al , 2009 )
Orogenic gold in the Blue Mountains, eastern Oregon, USA The overlapping wedges could be A) thrust-bounded slices of the mechanically strong siliceous unit within the argillite sequence surrounded by strongly contorted, fine, and mechanically weak argillite, and or B) pinch-and-swell features produced during original deposition of the argillite interbeds (as described by Brooks et al , 1982)
Clay content of argillites: Influence on cement based mortars The argillite samples investigated were obtained from Lafarge Centre de Recherche (LCR) They are named Ar-A, Ar-B, Ar-C and Ar-D Ar-A and Ar-B come from the same quarry and have similar composition The mineral characterisation of the different raw samples has been done by ERM SARL (Poitiers, France)
Polynesian quarrying at the bottom of the world – Raw material . . . The system focused on the production of adzes from Bluff argillite, a tough metasedimentary rock obtained primarily from Coylers Island in the north of the harbour To better understand quarrying and reduction strategies on Colyers Island, we undertook investigations there which included the surface collection of 148 adze blanks and test