Scientific data near [18.13000,-66.96000]

Search area extends approximately 4.5 km east-west and 4.7 km north-south.

Geographic context

Counties, states, countries, continents, or oceans
Sabana Grande	municipio
Puerto Rico	territory
U.S. possessions and associated areas
North America	continent
Land	continent
Watershed boundaries (USGS hydrologic units)

Geology of Puerto Rico

Geologic units and faults from USGS Open File Report 98-38, concerning assessment of the mineral resources of Puerto Rico

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Unit	Lithology	Description
Mariquita Chert	Chert	Laminated, fine-grained, dark-gray chert. Contains abundant to sparse radiolaria, and locally, Foraminifera. Locally interbedded with recrystallized and largely silicified limestone(?), and with non-metamorphosed pillowed basalt. Maximum estimated thickness, 300 m. Exposed in the Cabo Rojo, Puerto Real, San German, Parguera, and Punta Verraco quadrangles
Serpentinite	Serpentinite	Sheared light- to dark-green, serpentinite; chiefly altered harzburgite. Epiclastic serpentinite is poorly sorted, unsheared, and retains a characteristic epiclastic appearance in both clasts and matrix. Exposed in the Mayaguez, Rosario, Maricao, Sabana Grande, Yauco, Punta Verraco, Parguera, Cabo Rojo, San German, and Puerto Real quadrangles
Two pyroxene olivine basalt	Basalt	Porphyritic augite hypersthene-olivine basalt. Exposed in the Yauco, Sabana Grande, Guanica, Parguera, San German, Cabo Rojo, Mayaguez, Rosario, and Maricao quadrangles

Airborne geophysical surveys

Aerial surveys of magnetic anomaly and gamma ray emission; older surveys were analog record which have been digitized, newer surveys collected data in digital form.

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ID	Data type	Description
San German	M-Dz	San German 563 line km with spacing 0.40 km over parts of PR

Mineral Resource Data System

MRDS describes metallic and nonmetallic mineral resources throughout the world. Included are deposit name, location, commodity, deposit description, geologic characteristics, production, reserves, resources, and references.

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Site name	Development	Commodities
Maricao East	Prospect	CR CO FE NI
Maricao East and Las Tetas De Cerro Gordo East	Occurrence	NI FE CO CR

An index to PGE-Ni-Cr deposits and occurrences in selected mineral-occurrence databases (web-accessible database)

A compendium of references to previously published databases and database records that describe PGE, nickel, and chromium deposits and occurrences. These data show where to obtain more detailed information about each deposit or occurrence.

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Deposit name	Deposit type	Location
Maricao East and Las Tetas De Cerro Gordo East	Occurrence	Puerto Rico, United States
Maricao West and Las Tetas De Cerro Gordo West	Occurrence	Puerto Rico, United States
Maricao East	Occurrence
Maricao West	Occurrence

National Geochemical Database: Sediment

Geochemical analysis of sediment samples from the National Geochemical Database. Primarily inorganic elemental concentrations, most samples are of stream sediment in the continental US and Alaska.

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Sample ID	Sample source	Sample notes
BHJ691	float/colluvium/talus	SD; utmx=98520.; utmy=32900.; float
BHJ692	float/colluvium/talus	SD; utmx=98570.; utmy=33000.; float
BHJ693	float/colluvium/talus	SD; utmx=98720.; utmy=32710.; float
BHK134	float/colluvium/talus	SD; utmx=94800.; utmy=33800.; float
BHK135	float/colluvium/talus	SD; utmx=95375.; utmy=33475.; float
BHK188	float/colluvium/talus	SD; utmx=96100.; utmy=31320.; float
BHK258	float/colluvium/talus	SD; utmx=95375.; utmy=33475.; float

National Geochemical Database: Soil

Geochemical analysis of soil samples from the National Geochemical Database. Primarily inorganic elemental concentrations, most samples are from the continental US and Alaska.

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Sample ID	Sample source	Sample notes
W252858	artificial exposure	LATERITE; road cut
W252859	artificial exposure	LATERITE; road cut
W252860	artificial exposure	LATERITE; road cut
W252861	artificial exposure	LATERITE; road cut
W252862	artificial exposure	LATERITE; road cut

Global assessment of undiscovered copper resources

Deposits, prospects, and permissive tracts for porphyry and sediment-hosted copper resources worldwide, with estimates of undiscovered copper resources.

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Tract name	Deposit type	Geology
Santiago	porphyry copper	Cretaceous-Eocene oceanic arc associated with subduction along the northern Caribbean Plate boundary, corresponding to the modern Greater Antilles Arc