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LCZO -- Soil Mineralogy -- Mineral content of soils 0-20 cm XRD -- Northeastern Puerto Rico -- (2010-2011)
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Abstract
Mineralogy of Soils Overlying the Two Main Geologic Provinces of the El Yunque National Forest, Puerto Rico
A total of twenty 0-20cm soil samples from the El Yunque National Forest, Puerto Rico, have been analyzed using XRD analysis to determine their mineral content. Qualitative and quantitative analysis of the data show that all the samples contain quartz, orthoclase, kaolinite, dickite, halloysite and nicrite, gibbsite, augelite, metavariscite, goethite, tsaregorodtsevite, apophylite. Soil sample from Oxisols sites contain higher percentage of clay minerals than the samples from Dystrudepts sites. Furthermore, the general pattern of the percentage of total clays, feldspars, and gibbsite within each and between transects suggest that soils in the valleys are more weathered and leached than soils from ridges. The percentage increase of phosphate minerals in the soils follow that of clay minerals which is most probably due to the attachment of the phosphate minerals to clay mineral surfaces. The presence of the organic cation Tetramethylammonium in the cavities between the oxygen-silicon tetrahedra of the tsaregorodtsevite structure (feldsphoid-zeolitic structure) is consistent with a low energy mechanism for the sequestration of carbon and nitrogen in the EYNF soils.
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LCZO -- Soil Mineralogy -- Mineral content of soils 0-20 cm XRD -- Northeastern Puerto Rico -- (2010-2011)
OVERVIEW
Description/Abstract
Mineralogy of Soils Overlying the Two Main Geologic Provinces of the El Yunque National Forest, Puerto Rico
A total of twenty 0-20cm soil samples from the El Yunque National Forest, Puerto Rico, have been analyzed using XRD analysis to determine their mineral content. Qualitative and quantitative analysis of the data show that all the samples contain quartz, orthoclase, kaolinite, dickite, halloysite and nicrite, gibbsite, augelite, metavariscite, goethite, tsaregorodtsevite, apophylite. Soil sample from Oxisols sites contain higher percentage of clay minerals than the samples from Dystrudepts sites. Furthermore, the general pattern of the percentage of total clays, feldspars, and gibbsite within each and between transects suggest that soils in the valleys are more weathered and leached than soils from ridges. The percentage increase of phosphate minerals in the soils follow that of clay minerals which is most probably due to the attachment of the phosphate minerals to clay mineral surfaces. The presence of the organic cation Tetramethylammonium in the cavities between the oxygen-silicon tetrahedra of the tsaregorodtsevite structure (feldsphoid-zeolitic structure) is consistent with a low energy mechanism for the sequestration of carbon and nitrogen in the EYNF soils.
Creator/Author
Zhuo Wang
CZOs
Luquillo
Contact
Miguel Leon, Miguel.Leon@unh.edu
SUBJECTS
Disciplines
Geochemistry / Mineralogy
Topics
Soil Mineralogy
Subtopic
Mineral content of soils 0-20 cm XRD
Keywords
Soil Mineralogy|XRD|X-Ray Diffraction
Variables
Apophylite| Augelite| Metavariscite| Gibbsite| Goethite| Orthhoclase| Albite| Dickite| Haolloysite| Kaolinite| Nacrite| Quartz| Tsargorodtsevite| Vermiculite| Melanovanadite|
Variables ODM2
Albite|Apophyllite|Augelite|Clay|Gibbsite|Goethite|Halloysite|Nacrite|Orthoclase|Quartz|Vermiculite
TEMPORAL
Date Start
2010-05-15
Date End
2011-05-20
SPATIAL
Field Areas
Northeastern Puerto Rico and the Luquillo Mountains
Location
Northeastern Puerto Rico
North latitude
18.32232903
South latitude
18.26143335
West longitude
-65.85692813
East longitude
-65.74067507
REFERENCE
Citation
Wang Z., Mineralogy of Soils Overlying the Two Main Geologic Provinces of the El Yunque National Forest, Puerto Rico. A Master Thesis. University of Pennsylvania, 2011.
CZO ID
5531
Additional Metadata
| Name | Value |
|---|---|
| czos | Luquillo |
| czo_id | 5531 |
| citation | Wang Z., Mineralogy of Soils Overlying the Two Main Geologic Provinces of the El Yunque National Forest, Puerto Rico. A Master Thesis. University of Pennsylvania, 2011. |
| keywords | Soil Mineralogy, XRD, X-Ray Diffraction |
| variables | Apophylite, Augelite, Metavariscite, Gibbsite, Goethite, Orthhoclase, Albite, Dickite, Haolloysite, Kaolinite, Nacrite, Quartz, Tsargorodtsevite, Vermiculite, Melanovanadite, |
| disciplines | Geochemistry / Mineralogy |
How to Cite
This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
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