LCZO -- Soil Mineralogy -- Mineral content of soils 0-20 cm XRD -- Northeastern Puerto Rico -- (2010-2011)

Authors:

Zhuo Wang

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CZO Luquillo CZO National

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Nov 19, 2019 at 7:09 a.m.

Last updated:

Nov 21, 2019 at 8:08 p.m.

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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.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:

WGS 84 EPSG:4326

Coordinate Units:

Decimal degrees

Place/Area Name:

Northeastern Puerto Rico and the Luquillo Mountains, Northeastern Puerto Rico

North Latitude

18.3223°

East Longitude

-65.7407°

South Latitude

18.2614°

West Longitude

-65.8569°

Temporal

Start Date:	05/15/2010
End Date:	05/20/2011

Streets Terrain Satelite

Spatial Extent

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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

Wang, Z. (2019). LCZO -- Soil Mineralogy -- Mineral content of soils 0-20 cm XRD -- Northeastern Puerto Rico -- (2010-2011), HydroShare, http://www.hydroshare.org/resource/e093b98a554c4ffa80786f3b608de00c

This resource is shared under the Creative Commons Attribution CC BY.

http://creativecommons.org/licenses/by/4.0/

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