Heavy metals in urban soils: a case study from the city of Palermo (Sicily), Italy.

Subsurface samples of shales ranging in age from Pleistocene to Eocene obtained from five Gulf Coast oil wells were examined mineralogically and chemically to determine the nature and extent of burial diagenesis in pelitic sediments. Illite/montmorillonite dominates the mineralogy and undergoes a monotonic decrease in expandability from about 80 to a limit of 20 per cent montmorillonite layers with increasing depth. The interstratification changes from random to ordered at about 35 per cent expanded layers. Discrete illite and kaolinite phases are ubiquitous and judged detrital. The discrete illite (mica) content of the whole rock decreases with depth, while the kaolinite shows no systematic variation. Chlorite occurs in appreciable amounts in only one well and there only in samples from the shallow water facies. This chlorite is also considered detrital.

Burial Diagenesis in Gulf Coast Pelitic Sediments

Purification of metal electroplating waste waters using zeolites

Clay minerals are classified and non-clay minerals in the clay fraction listed. Chapters follow on: the environment and occurence of clay minerals; various kinds, their structures and diffraction patterns; x-ray diffraction as applied to clay mineralogy; preparation of clays for x-ray examination; quantitative estimation of clay minerals in a mixture.

Clay minerals: A guide to their X-ray identification

Geochemistry of Precambrian and Paleozoic siliciclastic rocks from the Iberian Range (NE Spain): implications for source-area weathering, sorting, provenance, and tectonic setting.

-----------------------------------------Introduction.-------------------------------------X-ray analysis ________ --_--_--_----_________ ------Sample preparation and treatment _______________ _ Interpretation---------------------------------Whole rock data ___________________________ _ Carbonate minerals.--------_____ -----_ Disordered cristobalite _________________ _ Total clay minerals __ -------__________ _ Clay fraction data_------------__ ------__ _ Clay minerals present __ ----------------Comparison of X-ray peak sizes _________ _ Estimation of kaolinite and chlorite ______ _ Examples of interpretation __________________ _ ReproducibilitY------------------------------------Long-term reproducibility----__________________ _ Accuracy-comparison with chemical analyses _________ _ Sulfide, sulfate, and carbonate minerals ___________ _ Page

/pdf/quantitative-interpretation-of-mineralogical-composition-4huxxe5qch.pdf

L.G. Schultz

Papers

Quantitative interpretation of mineralogical composition from X-ray and chemical data for the Pierre Shale