Homestake Mine, South Dakota
E727972
Homestake Mine in South Dakota is a historic gold mine that later became famous as the site of Raymond Davis Jr.’s pioneering solar neutrino experiment.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Homestake Gold Mine | 1 |
| Homestake Mine | 1 |
| Homestake Mine, South Dakota canonical | 1 |
| Homestake mine, South Dakota | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8363295 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Homestake Mine, South Dakota Context triple: [Raymond Davis Jr., workLocation, Homestake Mine, South Dakota]
-
A.
Round Mountain Gold Mine
Round Mountain Gold Mine is a large open-pit gold mining operation in central Nevada known for its significant gold production.
-
B.
North Star Mine
North Star Mine is a historic gold mine and landmark in Grass Valley, California, that played a significant role in the region’s 19th- and early 20th-century mining industry.
-
C.
Tioga Mine
Tioga Mine was a historic silver mining operation in the Sierra Nevada of California that gave its name to nearby Tioga Pass.
-
D.
Capps Mine
Capps Mine is a historically significant gold mine in North Carolina known for its role in the state’s early gold-mining industry.
-
E.
Pioche mining district
The Pioche mining district is a historic silver and lead mining area centered around the town of Pioche in southeastern Nevada, known for its rich ore deposits and boomtown past in the late 19th century.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Homestake Mine, South Dakota Target entity description: Homestake Mine in South Dakota is a historic gold mine that later became famous as the site of Raymond Davis Jr.’s pioneering solar neutrino experiment.
-
A.
Round Mountain Gold Mine
Round Mountain Gold Mine is a large open-pit gold mining operation in central Nevada known for its significant gold production.
-
B.
North Star Mine
North Star Mine is a historic gold mine and landmark in Grass Valley, California, that played a significant role in the region’s 19th- and early 20th-century mining industry.
-
C.
Tioga Mine
Tioga Mine was a historic silver mining operation in the Sierra Nevada of California that gave its name to nearby Tioga Pass.
-
D.
Capps Mine
Capps Mine is a historically significant gold mine in North Carolina known for its role in the state’s early gold-mining industry.
-
E.
Pioche mining district
The Pioche mining district is a historic silver and lead mining area centered around the town of Pioche in southeastern Nevada, known for its rich ore deposits and boomtown past in the late 19th century.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
gold mine
ⓘ
historic site ⓘ underground mine ⓘ |
| annualGoldProductionRank | one of the largest and deepest gold mines in North America ⓘ |
| associatedWithAward | Nobel Prize in Physics 2002 NERFINISHED ⓘ |
| associatedWithPerson | Raymond Davis Jr. NERFINISHED ⓘ |
| closed | 2002 ⓘ |
| contributedToDiscoveryOf |
neutrino oscillations (indirectly)
ⓘ
solar neutrino deficit ⓘ |
| country | United States of America ⓘ |
| depth |
about 8000 feet
ⓘ
more than 2400 meters ⓘ |
| discoveredIn | 1876 ⓘ |
| experimentEnd | 1990s ⓘ |
| experimentStart | late 1960s ⓘ |
| geologicalSetting | Precambrian metamorphic rocks ⓘ |
| heritageDesignation | National Historic Landmark District (as part of Lead historic district) NERFINISHED ⓘ |
| hostedExperiment |
Homestake solar neutrino experiment
NERFINISHED
ⓘ
Raymond Davis Jr. chlorine-based solar neutrino experiment ⓘ |
| knownFor |
hosting one of the first major underground neutrino detectors
ⓘ
large-scale gold production ⓘ site of the Homestake solar neutrino experiment ⓘ |
| laterUse |
precursor site for the Sanford Underground Research Facility
ⓘ
underground research facility ⓘ |
| locatedIn | Lead, South Dakota NERFINISHED ⓘ |
| locatedInAdministrativeTerritory | Lawrence County, South Dakota NERFINISHED ⓘ |
| locatedInMountainRange | Black Hills NERFINISHED ⓘ |
| locatedInTimeZone | Mountain Time Zone ⓘ |
| nearbySettlement | Deadwood, South Dakota NERFINISHED ⓘ |
| neutrinoDetectorType | chlorine-based radiochemical detector ⓘ |
| neutrinoTargetMaterial | perchloroethylene ⓘ |
| opened | 1877 ⓘ |
| operatedBy | Homestake Mining Company NERFINISHED ⓘ |
| oreType | lode gold deposit ⓘ |
| ownedBy | Homestake Mining Company NERFINISHED ⓘ |
| partOf | Black Hills gold rush NERFINISHED ⓘ |
| primaryCommodity | gold ⓘ |
| production | over 40 million troy ounces of gold (approximate, cumulative) ⓘ |
| region | Black Hills region of South Dakota NERFINISHED ⓘ |
| relatedTo | solar neutrino problem ⓘ |
| scientificDiscipline |
astrophysics
ⓘ
neutrino physics ⓘ particle physics ⓘ |
| secondaryCommodity |
lead
ⓘ
silver ⓘ zinc ⓘ |
| status | closed as a commercial mine ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Homestake Mine, South Dakota Description of subject: Homestake Mine in South Dakota is a historic gold mine that later became famous as the site of Raymond Davis Jr.’s pioneering solar neutrino experiment.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Homestake Mine
this entity surface form:
Homestake Gold Mine
this entity surface form:
Homestake mine, South Dakota