Redistribution of Trace Elements Upon the Weathering of Volcanic Ash Soils in Costa Rica PDF Download
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Author:
Publisher: Bib. Orton IICA / CATIE
ISBN:
Category :
Languages : en
Pages : 124
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Book Description
Author:
Publisher: Bib. Orton IICA / CATIE
ISBN:
Category :
Languages : en
Pages : 124
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Book Description
Author: M. J. Plantinga
Publisher:
ISBN:
Category :
Languages : en
Pages : 37
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Book Description
Author:
Publisher: Bib. Orton IICA / CATIE
ISBN: 9789977573359
Category :
Languages : en
Pages : 182
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Book Description
Author: Royal New Zealand Foundation for the Blind
Publisher: Bib. Orton IICA / CATIE
ISBN:
Category : Blind
Languages : en
Pages : 52
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Book Description
Author: Wendy Lee
Publisher:
ISBN:
Category :
Languages : en
Pages : 140
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Book Description
Author: F. R. Gahrooee
Publisher:
ISBN:
Category :
Languages : en
Pages : 69
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Book Description
Author: Günter Miehlich
Publisher:
ISBN:
Category : Andosols
Languages : en
Pages : 224
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Book Description
Author: J. P. Andriesse
Publisher:
ISBN:
Category :
Languages : en
Pages : 15
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Book Description
Author: Christina Jones
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Sands rich in volcanic ash have been encountered within the late Cenozoic sequence offshore Louisiana in the northern Gulf of Mexico. These beds are identified on well logs by their high radioactivity and low density. Paleontologic markers used to date these deposits give dates that are consistent with eruptions from the Snake River Plain (SRP) and Yellowstone calderas. Lead isotope ratios from the Gulf of Mexico samples are also consistent with the SRP-Yellowstone tuffs. The objective of this study was to compare the rare earth element (REE) and other trace element data from the GOM samples to determine whether they may be differentiated from one another, and also whether they compare to the SRP data. Well cuttings and sidewall core samples from sixteen wells known to contain volcanic ash were density separated using lithium metatungstate to isolate the low density volcanic glass from the remaining minerals. The concentrated ash was dissolved and analyzed using ICP-MS. Trace and REE variations were plotted by depositional age based upon paleontological markers. Variations in most trace elements are not useful criteria for discriminating ash by age. There is a wide spread in fairly mobile elements (i.e. Sr, Ba), suggesting that each ash bed has had a different diagenetic history. REE variations, in particular the magnitude of the Europium anomaly and the degree of fractionation between light and heavy REE, are good discriminates of each ash. A few anomalous samples plot within an older field, which might be explained by reworking of older ash into younger deposits. Direct correlation to SRP-Yellowstone eruptions is hindered by the lack of SRP samples analyzed using similar methods.
Author: S. Shoji
Publisher: Elsevier
ISBN: 0080869890
Category : Science
Languages : en
Pages : 313
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Book Description
Volcanic eruptions are generally viewed as agents of destruction, yet they provide the parent materials from which some of the most productive soils in the world are formed. The high productivity results from a combination of unique physical, chemical and mineralogical properties. The importance and uniqueness of volcanic ash soils are exemplified by the recent establishment of the Andisol soil order in Soil Taxonomy. This book provides the first comprehensive synthesis of all aspects of volcanic ash soils in a single volume. It contains in-depth coverage of important topics including terminology, morphology, genesis, classification, mineralogy, chemistry, physical properties, productivity and utilization. A wealth of data (37 tables, 81 figures, and Appendix) mainly from the Tohoku University Andisol Data Base is used to illustrate major concepts. Twelve color plates provide a valuable visual-aid and complement the text description of the world-wide distribution for volcanic ash soils. This volume will serve as a valuable reference for soil scientists, plant scientists, ecologists and geochemists interested in biogeochemical processes occurring in soils derived form volcanic ejecta.
