Deposit

Smackover-Lanxess

Smackover-Lanxess is a deposit with published resource estimates in Arkansas, recorded in the USGS lithium deposits in the United States selected-sites dataset (2020 release).

Facts on this page last re-verified Aug 18, 2026 — the oldest verification date among its current claims. How we verify.

Location: Arkansas, United States (33.169, -92.779 approx.)

Commodities: lithium; bromine

Deposit model: lithium-enriched oilfield brine · unclassified

Published resource estimates

As compiled by USGS USMIN from the cited studies. Resource classes follow the source; "approximate" flags values USMIN reports as approximations. These are not current company reserve statements.

Material	Class	Amount	Grade	Contained	As of	Reference
lithium (Li)	Inferred	—	—	—	Jan 1, 2018	Eccles and others (2018), Page 117, Table 23 — Eccles, D.R., Black, W., Hill, K., Molnar, R. ,and Rakhit, K., 2018, Geological introduction and maiden inferred resource estimate for Standard Lithium Ltd.'s Lanxess Smackover Lithium-Brine Property in Arkansas, United States, prepared for Standard Lithium Limited [Effective date November 19, 2018]: Edmonton, Alberta, Canada, Apex Geoscience Ltd., November 19, 157 p. [Also available at http://sedar.com.]
lithium (Li)	Inferred	—	—	—	Jan 1, 2018	Eccles and others (2018), Page 117, Table 23 — Eccles, D.R., Black, W., Hill, K., Molnar, R. ,and Rakhit, K., 2018, Geological introduction and maiden inferred resource estimate for Standard Lithium Ltd.'s Lanxess Smackover Lithium-Brine Property in Arkansas, United States, prepared for Standard Lithium Limited [Effective date November 19, 2018]: Edmonton, Alberta, Canada, Apex Geoscience Ltd., November 19, 157 p. [Also available at http://sedar.com.]
lithium (Li)	Inferred	—	—	—	Jan 1, 2018	Eccles and others (2018), Page 117, Table 23 — Eccles, D.R., Black, W., Hill, K., Molnar, R. ,and Rakhit, K., 2018, Geological introduction and maiden inferred resource estimate for Standard Lithium Ltd.'s Lanxess Smackover Lithium-Brine Property in Arkansas, United States, prepared for Standard Lithium Limited [Effective date November 19, 2018]: Edmonton, Alberta, Canada, Apex Geoscience Ltd., November 19, 157 p. [Also available at http://sedar.com.]

Recorded production

Smackover-Lanxess, BSW-4S: produced an unstated amount of bromine (Br) at 5,070 milligrams per liter, 1979–2018 (Eccles and others (2018); Arkansas Oil and Gas Commission (2018); Moldovanyi and Walter (1992), Page 32, Table 5)
Smackover-Lanxess, BSW-5S: produced an unstated amount of bromine (Br) at 5,070 milligrams per liter, 1987–2018 (Eccles and others (2018); Arkansas Oil and Gas Commission (2018); Moldovanyi and Walter (1992), Page 32, Table 5)
Smackover-Lanxess, BSW-10S: produced an unstated amount of bromine (Br) at 5,070 milligrams per liter, 1979–2018 (Eccles and others (2018); Arkansas Oil and Gas Commission (2018); Moldovanyi and Walter (1992), Page 32, Table 5)
Smackover-Lanxess, BSW-20S: produced an unstated amount of bromine (Br) at 5,070 milligrams per liter, 1979–2018 (Eccles and others (2018); Arkansas Oil and Gas Commission (2018); Moldovanyi and Walter (1992), Page 32, Table 5)
Smackover-Lanxess, BSW-21S: produced an unstated amount of bromine (Br) at 5,070 milligrams per liter, 1996–2018 (Eccles and others (2018); Arkansas Oil and Gas Commission (2018); Moldovanyi and Walter (1992), Page 32, Table 5)
Smackover-Lanxess, BSW-13: produced an unstated amount of bromine (Br) at 5,070 milligrams per liter, 1988–2018 (Eccles and others (2018); Arkansas Oil and Gas Commission (2018); Moldovanyi and Walter (1992), Page 32, Table 5)
Smackover-Lanxess, BSW-14: produced an unstated amount of bromine (Br) at 5,070 milligrams per liter, 1994–2018 (Eccles and others (2018); Arkansas Oil and Gas Commission (2018); Moldovanyi and Walter (1992), Page 32, Table 5)
Smackover-Lanxess, BSW-15: produced an unstated amount of bromine (Br) at 5,070 milligrams per liter, 1999–2018 (Eccles and others (2018); Arkansas Oil and Gas Commission (2018); Moldovanyi and Walter (1992), Page 32, Table 5)
Smackover-Lanxess, Spencer 1: produced an unstated amount of bromine (Br) at 5,070 milligrams per liter, 1996–2018 (Eccles and others (2018); Arkansas Oil and Gas Commission (2018); Moldovanyi and Walter (1992), Page 32, Table 5)
Smackover-Lanxess, H. Carroll 1: produced an unstated amount of bromine (Br) at 5,070 milligrams per liter, 1976–2018 (Eccles and others (2018); Arkansas Oil and Gas Commission (2018); Moldovanyi and Walter (1992), Page 32, Table 5)
Smackover-Lanxess, Joy Kadison 2: produced an unstated amount of bromine (Br) at 5,070 milligrams per liter, 1979–2018 (Eccles and others (2018); Arkansas Oil and Gas Commission (2018); Moldovanyi and Walter (1992), Page 32, Table 5)
Smackover-Lanxess, BSW-5M: produced an unstated amount of bromine (Br) at 5,070 milligrams per liter, 1979–2018 (Eccles and others (2018); Arkansas Oil and Gas Commission (2018); Moldovanyi and Walter (1992), Page 32, Table 5)
Smackover-Lanxess, BSW-6M: produced an unstated amount of bromine (Br) at 5,070 milligrams per liter, 1981–2018 (Eccles and others (2018); Arkansas Oil and Gas Commission (2018); Moldovanyi and Walter (1992), Page 32, Table 5)
Smackover-Lanxess, BSW-7M: produced an unstated amount of bromine (Br) at 5,070 milligrams per liter, 1979–2018 (Eccles and others (2018); Arkansas Oil and Gas Commission (2018); Moldovanyi and Walter (1992), Page 32, Table 5)
Smackover-Lanxess, BSW-A8M: produced an unstated amount of bromine (Br) at 5,070 milligrams per liter, 1995–2018 (Eccles and others (2018); Arkansas Oil and Gas Commission (2018); Moldovanyi and Walter (1992), Page 32, Table 5)
Smackover-Lanxess, BSW-10M: produced an unstated amount of bromine (Br) at 5,070 milligrams per liter, 1994–2018 (Eccles and others (2018); Arkansas Oil and Gas Commission (2018); Moldovanyi and Walter (1992), Page 32, Table 5)
Smackover-Lanxess, BSW-12M: produced an unstated amount of bromine (Br) at 5,070 milligrams per liter, 1995–2018 (Eccles and others (2018); Arkansas Oil and Gas Commission (2018); Moldovanyi and Walter (1992), Page 32, Table 5)
Smackover-Lanxess, BSW-13M: produced an unstated amount of bromine (Br) at 5,070 milligrams per liter, 1995–2018 (Eccles and others (2018); Arkansas Oil and Gas Commission (2018); Moldovanyi and Walter (1992), Page 32, Table 5)
Smackover-Lanxess, BSW-14M: produced an unstated amount of bromine (Br) at 5,070 milligrams per liter, 1995–2018 (Eccles and others (2018); Arkansas Oil and Gas Commission (2018); Moldovanyi and Walter (1992), Page 32, Table 5)
Smackover-Lanxess, BSW-15M: produced an unstated amount of bromine (Br) at 5,070 milligrams per liter, 1997–2018 (Eccles and others (2018); Arkansas Oil and Gas Commission (2018); Moldovanyi and Walter (1992), Page 32, Table 5)
Smackover-Lanxess, BSW-16M: produced an unstated amount of bromine (Br) at 5,070 milligrams per liter, 1997–2018 (Eccles and others (2018); Arkansas Oil and Gas Commission (2018); Moldovanyi and Walter (1992), Page 32, Table 5)
Smackover-Lanxess, BSW-17M: produced an unstated amount of bromine (Br) at 5,070 milligrams per liter, 1996–2018 (Eccles and others (2018); Arkansas Oil and Gas Commission (2018); Moldovanyi and Walter (1992), Page 32, Table 5)
Smackover-Lanxess, BSW-18M: produced an unstated amount of bromine (Br) at 5,070 milligrams per liter, 1999–2018 (Eccles and others (2018); Arkansas Oil and Gas Commission (2018); Moldovanyi and Walter (1992), Page 32, Table 5)
Smackover-Lanxess, BSW-19M: produced an unstated amount of bromine (Br) at 5,070 milligrams per liter, 2006–2018 (Eccles and others (2018); Arkansas Oil and Gas Commission (2018); Moldovanyi and Walter (1992), Page 32, Table 5)

Exploration and site history

Resources: “Using an average Reynolds Member thickness of 56.7 m yields the following general aquifer characteristics: hydraulic conductivity of 5.8 x 10-6 m/s; transmissivity of the aquifer is 3.3 x 10-4 m2/s; and, storativity of the aquifer is 2.2 x 10-5. Estimation of the Reynolds Member, Smackover Formation has been estimated using the relation: Lithium Resource = Paverage × VAquifer × Caverage, where Paverage = Average global block model porosity (11.6%) calculated by using the volume-weighted average porosity of the brine units and their respective unit areas; VAquifer = Total volume of the Reynolds Member aquifer (30.427 km3); and Caverage is the average concentration of Li in brine that was collected at the brine supply wells (164.9 mg/L Li). The main Maiden Inferred Lanxess Li-Brine Resource is estimated at 580,000 tonnes of elemental Li (639,000 tons elemental Li; Table 1). The total lithium carbonate equivalent (“LCE”) for the main resource is 3,086,000 tonnes LCE (3,401,000 tons LCE).” (Eccles and others (2018))
Site: “The Lanxess Property is located south and west of the City of El Dorado in Union County, Arkansas, U.S. The southern and western edges of the Property border the State of Louisiana and Columbia County, respectively. The Property encompasses Townships 16-19 South and Ranges 15-18 West of the 5th Meridian. The Property center is at: UTM 520600 Easting, 3670000 Northing, Zone 15N, NAD83. The land package is 150,081.81 acres that covers over 607 km2 (>234 square miles). Of the total land package, 142,881.81 acres are ‘unitized’ and approximately 7,200 acres occur outside the unit boundaries.” (Eccles and others (2018))
Exploration — Standard Lithium Ltd., completed a preliminary brine geochemical survey, subsurface data review, and geochemical brine sampling programs, 2017–2018 (Eccles and others (2018))
Evaluation — NI 43-101 compliant report, 2018 (Eccles and others (2018))
Active — Bromine has been produced from the brine since 1957 and production is still active, 1957 (Eccles and others (2018))
Discovery — Discovery of oil in southern Arkansas in 1921, 1921 (Eccles and others (2018))

Record imported from USGS USMIN ver. 4.0 (June 2019). Developments after that date appear on facility records, not here; see the methodology.

Sources

U.S. Geological Survey · published Jun 1, 2020 · retrieved Aug 18, 2026 · archive