AKA: Puerto Rico geochemistry
Other ID: none
Organization(s): USGS, Pacific Coastal and Marine Science Center
Funding Program(s): Past, Present and Future Coral Reefs (ZP00FRV)
Principal Investigator(s): Renee Takesue
Affiliate Investigator(s): Dr. Aaron Reyes, Westfield University, Massachusetts
Information Specialist(s): Renee Takesue
Data Type(s): Location-Elevation: Navigation, Sampling: Geology
Scientific Purpose/Goals: Collect stream sediment samples and nearshore samples in southern Puerto Rico and Guanica Bay; collect forest soil samples
Start Port/Location: Guanica, Puerto Rico
End Port/Location: Guanica, Puerto Rico
Start Date: 2017-06-18
End Date: 2018-03-30
Equipment Used: Handheld GPS, Hand-grab sample
Information to be Derived: Geochemical compositional data, strontium isotope ratios, sediment grain size distribution, organic carbon content, stable carbon isotope ratio
Summary of Activity and Data Gathered: Collected 63 sediment samples and 21 bedrock samples.
Notes: 51 stream sediment samples collected on foot. 12 Marine samples collected from the University of Puerto Rico at Mayaguez, Magueyes Marine Lab 20-foot whaler.
Southern Puerto Rico
|North: 18.12546007||South: 17.92813381||West: -66.96716309||East: -66.01285129|
Takesue, R.K., 2019, Geochemical and isotopic compositions of stream sediment, parent rock, and nearshore sediment from southwest Puerto Rico, April 2017-June 2018: U.S. Geological Survey data release, https://doi.org/10.5066/P9QEAV6O.
Takesue, R.K., 2022, Metal and other element partitioning in southwest Puerto Rico ultramafic soil, Rio Loco sediment, and Guanica Bay sediment: U.S. Geological Survey data release, https://doi.org/10.5066/P9MN33MB.
|Survey Equipment||Survey Info||Data Type(s)||Data Collected|
|Southwest Puerto Rico Extractions ( Five-stage sequential extractions were performed on ultramafic soil from Bosque Susua and Guanica Dry Forest, stream sediment from Rios Loco and Yauco, and nearshore sediment from Guanica Bay in southwest Puerto Rico. Sequential extractions showed partitioning of geologically enriched metals and other elements among five phases: 1) adsorbed and calcium-bound, 2) iron-, manganese-oxyhydroxide-bound, 3) crystalline iron-oxide-bound, 4) sulfide-bound, and 5) residual. Total element contents are also reported. Soil and sediment were collected between June 19, 2017, and March 27, 2018. )|