Identifier | 2017-625-FA | ||||||||
---|---|---|---|---|---|---|---|---|---|
Also known as | Puerto Rico geochemistry | ||||||||
Purpose | Collect stream sediment samples and nearshore samples in southern Puerto Rico and Guanica Bay; collect forest soil samples | ||||||||
Location | Southern Puerto Rico | ||||||||
Summary | Collected 63 sediment samples and 21 bedrock samples. | ||||||||
Info derived | Geochemical compositional data, strontium isotope ratios, sediment grain size distribution, organic carbon content, stable carbon isotope ratio | ||||||||
Comments | 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. | ||||||||
Projects | |||||||||
Platform |
|
||||||||
Vehicles | None |
||||||||
Itinerary |
|
||||||||
Bounds |
|
Organization |
2885 Mission Street
Santa Cruz, CA95060
(831) 460-7401
|
||
---|---|---|---|
Principal investigators | Renee K Takesue | ||
Crew members | |||
Information specialist(s) |
|
||
Affiliate principal | Dr. Aaron Reyes, Westfield University, Massachusetts |
Data category: | Location-Elevation, Sampling |
---|---|
Data type: | Navigation, Geology |
Equipment | Usage description | Data types | Datasets |
---|---|---|---|
Handheld GPS | Navigation | (no data reported) | |
Hand-grab sample | Biology, Chemistry, Geology | 2 |
Dataset name | Equipment | Description | Dataset contact |
---|---|---|---|
Southwest Puerto Rico Extractions | Hand-grab sample | 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. | Renee K Takesue |
Dataset name | Equipment | Description | Dataset contact |
---|---|---|---|
Geochemical and isotopic compositions of stream sediment, parent rock, and nearshore sediment from southwest Puerto Rico, April 2017-June 2018 | Hand-grab sample | Geochemical and isotopic compositions were determined in stream sediment and parent rocks collected in April 2017 and June 2017 and in nearshore sediment collected bimonthly in sediment traps from May 2017 to June 2018 in the coastal zone and 12 drainages of southwest Puerto Rico: Rio Loco, Yauco, Guayanilla, Macana, Tallaboa, Matilde, Portugues, Bucana, Inabon, Jacaquas, Descalabrado, and Coamo. Geochemical compositional data include: a) total contents of major, minor, trace, and rare earth elements in the <0.063 mm-diameter fraction of terrestrial (n=53) and nearshore sediment (n=63) and powdered rocks (n=19) analyzed by inductively coupled plasma optical emission spectroscopy (ICP-OES) and inductively coupled plasma mass spectroscopy (ICP-MS), b) major oxide contents of stream sediment (n=46) and rocks (n=19) determined by wavelength dispersive x-ray fluorescence spectrometry (WD-XRF), and c) total organic carbon and carbonate contents of stream (n=48) and nearshore (n=64) sediment determined coulometrically. Isotopic compositional data include: 1) strontium isotope ratios (87Sr/86Sr) determined by thermal ionization mass spectrometry in the <0.063 mm-diameter fraction of select stream (n=50) and nearshore (n=40) sediment, and in all rocks, and 2) activities of the short-lived cosmogenic nuclides beryllium-7, cesium-137, and excess (unsupported) lead-210 determined by gamma spectrometry on bulk nearshore sediment (n=44). The percentage by weight of the <0.063 mm-diameter sediment fraction (percent fines), the median grain size, and the silt to clay ratio are reported for stream (n=48) and nearshore (n=64) sediments. These data accompany Takesue, R.K., Sherman, C., Ramirez, N.I., Reyes, A.O., Cheriton, O.M., Rios, R.V., and Storlazzi, C.D., 2021, Land-based sediment sources and transport to southwest Puerto Rico coral reefs after Hurricane Maria, May 2017 to June 2018: Estuarine, Coastal and Shelf Science, v. 59, p. 107476, https://doi.org/10.1016/j.ecss.2021.107476. | Renee K Takesue |
Takesue, R.K., 2019, Geochemical and isotopic compositions of stream sediment, parent rock, and nearshore sediment from southwest Puerto Rico, April 2017-June 2018: , 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: , https://doi.org/10.5066/P9MN33MB.