Dataset Listing

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

Variables:  Apophylite, Augelite, Metavariscite, Gibbsite, Goethite, Orthhoclase, Albite, Dickite, Haolloysite, Kaolinite, Nacrite, Quartz, Tsargorodtsevite, Vermiculite, Melanovanadite,

Standard Variables:  Albite|Apophyllite|Augelite|Clay|Gibbsite|Goethite|Halloysite|Nacrite|Orthoclase|Quartz|Vermiculite

Date Range:  (2010-2011)

Dataset Creators/Authors:  Zhuo Wang

Contact:  Miguel Leon,

Field Area:   Northeastern Puerto Rico and the Luquillo Mountains

Keywords & XML
  • Description

    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.
  • Keywords

    Soil Mineralogy, XRD, X-Ray Diffraction

    XML Metadata

    XML is in ISO-19115 geographic metadata format, compatible with ESRI Geoportal Server.

  • Citation for This Dataset

    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.

    Citation for This Webpage

    Zhuo Wang (2011). "CZO Dataset: Northeastern Puerto Rico - Soil Mineralogy (2010-2011) - Mineral content of soils 0-20 cm XRD." Retrieved 12 Nov 2019, from


Northeastern Puerto Rico - Soil Mineralogy by XRD

(xlsx)   Data Level 2

University of Pennsylvania - Thesis

(of-/)   Data Level 4

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