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Silt fraction heavy-mineral distributions in a lateritic environment: The rivers and insular shelf of north-central Puerto Rico

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Silt fraction heavy-mineral distributions in a lateritic environment: the rivers and insular shelf of north-central Puerto Rico; 1995; Article; Journal; Sedimentary Geology; Poppe, L. J.; Commeau, J. A.; Luepke, G.

Summary

This fraction, which is enriched in heavy minerals relative to the sand fraction, is mainly detrital but contains a strong authigenic component. The authigenic silt heavy-mineral fraction is largely a product of the lateritic weathering and dominated by iron oxides and alterites. Grains of bladed rutile and leached ilmenite are common. Spatial variability in silt-fraction mineralogy is considerable. Within the Rio Cibuco system variability is related to compositional differences in rapidly eroding source rocks. On the shelf, silt heavy-mineral abundances are greatest at the river mouths and decrease seaward. Variability in the shelf samples is controlled primarily by source rivers and shelf sorting processes.

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Harvested on Mon Jul 21 14:06:13 MDT 2014 from MODS XML Service

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Type Scheme Key
local-index unknown 70019612
local-pk unknown 70019612
doi http://www.loc.gov/standards/mods/mods-outline-3-5.html#identifier doi:10.1016/0037-0738(94)00114-A
series unknown Sedimentary Geology

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citationTypeArticle
journalSedimentary Geology
languageEnglish
parts
typevolume
value95
typeissue
value3-4

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