Clay minerals from the loess-paleosol section at Baoji in north-central China were studied by X-ray Diffraction. The purpose here is to identify clay mineral variability and trends in the loess-paleosol record, and interpret their paleoclimatic
The examples, taken in weathered andesitic pyroclasts occurring in the northern and northeastern part of the island of Basse Terre (Guadeloupe), studied here highlight the occurrence of different clay minerals and their spatial variability both
at the macroscale- and micron and nanometre scale of observation. Such detailed observation scales underline the complexity and variability in mineral transformation during weathering.
The fluvial concentration of heavy minerals in the Slieve Bloom Mountains, Central Ireland
Alluvium ; Floodplain ; Fluvial processes ; Geomorphology ; Heavy minerals ; Hydrodynamics ; Ireland ; Model ; Mountain ; Principal components analysis ; Spatial variation
This paper presents a model of the development of heavy mineral concentrations in alluvial sediments of the Slieve Bloom Mountains in the context of the Quaternary geomorphological development of these mountains. This is achieved by identifying
groups of spatially-associated mineral species hosted in the Holocene alluvial sediments of the mountains and by explaining the spatial distribution processes of such groups.
Mineral nitrogen reserve in the soils of Belgium and the northern part of France during the winter of 1990
Since the introduction of the N-INDEX advice system in Belgium and in the northern part of France, the number of mineral nitrogen analyses of the soil is increasing. Also in the Netherlands where one has the N-MINERAAL advice system, the mineral
nitrogen analyses increased since 1975. The availability of the many soil analysis data makes it possible to give a review of the mineral nitrogen in the soil as a function of many factors i.e. the previous crop, the soil type, the organic fertilizer
The alluvial heavy minerals of Slieve Bloom consist of an allochtonous group, glacially imported from the Carboniferous limestone piedmont, and an autochthonous group derived from the Lower Palaeozoic rocks of Slieve Bloom. The spatial distribution
of each group is distinct from the other along the river valleys. Given this spatial arrangement, it is proposed that the distribution of allochtonous minerals now hosted by alluvial sediments reflects the pattern of glacial depositional processes within
the mountains, in particular a directionally specific distance decay in the carry over of minerals from the limestone piedmont into Slieve Bloom.
Nedknusing av bergartsfragmenter og mineralkorn ved bretransport Crushing of rock fragments and mineral grains by glacial transport
The crushing of mineral material and the formation of resistant mineral modes during the glacial transport are mainly dependant on the primary properties of the mineral material, inherited from the parent rock. This is illustrated
by the distribution of mineral grains from sedimentary rocks and crystalline rocks in the tills of Southern Ringsaker, Southeastern Norway. The bimodal distribution of each lithological till component can commonly not be observed on the grain-size distribution curves
Verification of a simple gravity technique for separation of particle size fractions suitable for mineral magnetic analysis
Techniques for the separation of sediment samples into size fractions are reviewed and the use of repeated decantations to provide samples for mineral magnetic analysis is described. Results from a series of trials are presented and compared
CLAY MINERALS OF SOME SOILS OF THE NILE VALLEY IN EGYPT
LE MINERAL DOMINANT EST LA MONTMORILLONITE. LA KAOLINITE EST PRESENTE EN PETITES QUANTITES. ILLICITE ET CHLORITE N'EXISTENT QU'A L'ETAT DE TRACES, DE MEME QUE CALCITE, FELDSPATH ET GOETHITE. PAS DE DIFFERENCE SIGNIFICATIVE SELON LES TYPES DE SOLS
Ocean minerals : prospects for South Pacific islands in Natural resource development in the Pacific Islands region.
The work of CCOP/SOPAC over the past decade is described as is the growth of its functions. Survey findings relating to manganese, cobalt, a variety of sulphide and detrital minerals, phosphates, hydrocarbons, coral and gravel are presented.
Granulometric and mineral composition of the loess-paleosol formation in Moldova in Distribution and chronological problems of loess.
are identified and general characteristics of the mineral composition are described that together with other lithological characteristics, improve reliability of stratigraphic operations.
Vysné Ruzbachy-najvydatnejsi areal mineralnych vod na Slovensku Vysné Ruzbachy-the most abundant mineral water area in Slovakia
The richest area of thermal mineral water of Slovakia has altogether eight main warm springs and some smaller springs with cold chalybeate water. The origin of these waters suppose the autor newly in the Propadska kotlina (Basin) and Levocska
Production, processing and consumption of non-metallic minerals, 1976-1982
The non-metallic mineral industry takes a significant place in Yugoslavia's economic structure, because it provides raw and intermediate materials for other economic branches and also manufactures finished consumer goods. List of major raw materials
The role of mineral resources in the economic history of Hungary in Geographical essays in Hungary.
The history of raw materials (with the changing definition of the concept) is followed in the territory of historical Hungary from the times of King Stephen I to our days. Mineral resources are gaining in importance to alleviate the heavy burden
Fault ; Geological structure ; Geothermics ; Hydrogeology ; Mineral water ; Slovak Republic ; Tectonics ; Thermal spring ; Water quality
From 1955 to 1985 an intensive hydrogeological survey has been carried out in Slovakia, in order to ascertain the conditions of forming mineral and geothermal waters in various geological structures and to find new sources of the afore-mentioned
It was established that each type of soil can be characterised by a specific distribution of mineral phases with definite structural-mineralogical indications being inherited from its parent material and syngenetic with soil formation