Kola Superdeep Borehole
E363639
The Kola Superdeep Borehole is a Soviet scientific drilling project in northwestern Russia that produced the deepest artificial point on Earth, reaching over 12 kilometers into the continental crust.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Kola Superdeep Borehole canonical | 1 |
| Kola superdeep drilling program | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3506268 — 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: Kola Superdeep Borehole Context triple: [Kola Peninsula, contains, Kola Superdeep Borehole]
-
A.
Darvaza gas crater
The Darvaza gas crater is a massive, continuously burning natural gas pit in Turkmenistan’s Karakum Desert, often called the “Door to Hell” and known for its dramatic fiery glow.
-
B.
Sumur
Sumur is a small village in the Nubra Valley of Ladakh, India, known for its scenic Himalayan landscape, Buddhist monastery, and traditional rural life.
-
C.
Sudwala Caves
Sudwala Caves are a famous and extensive limestone cave system in South Africa, renowned as one of the oldest known caves in the world and a popular tourist attraction.
-
D.
Blue Hole (Dahab)
Blue Hole (Dahab) is a famous and notoriously challenging marine sinkhole and dive site off the coast of Dahab in Egypt’s Red Sea, known for its deep vertical drop, rich coral life, and history of technical diving accidents.
-
E.
Gariep Dam
Gariep Dam is South Africa’s largest storage reservoir, situated on the Orange River and serving as a key source of water, hydroelectric power, and recreation for the surrounding regions.
- 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: Kola Superdeep Borehole Target entity description: The Kola Superdeep Borehole is a Soviet scientific drilling project in northwestern Russia that produced the deepest artificial point on Earth, reaching over 12 kilometers into the continental crust.
-
A.
Darvaza gas crater
The Darvaza gas crater is a massive, continuously burning natural gas pit in Turkmenistan’s Karakum Desert, often called the “Door to Hell” and known for its dramatic fiery glow.
-
B.
Sumur
Sumur is a small village in the Nubra Valley of Ladakh, India, known for its scenic Himalayan landscape, Buddhist monastery, and traditional rural life.
-
C.
Sudwala Caves
Sudwala Caves are a famous and extensive limestone cave system in South Africa, renowned as one of the oldest known caves in the world and a popular tourist attraction.
-
D.
Blue Hole (Dahab)
Blue Hole (Dahab) is a famous and notoriously challenging marine sinkhole and dive site off the coast of Dahab in Egypt’s Red Sea, known for its deep vertical drop, rich coral life, and history of technical diving accidents.
-
E.
Gariep Dam
Gariep Dam is South Africa’s largest storage reservoir, situated on the Orange River and serving as a key source of water, hydroelectric power, and recreation for the surrounding regions.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
deep borehole
ⓘ
scientific drilling project ⓘ |
| approximateLatitude | 69.396 ⓘ |
| approximateLongitude | 30.610 ⓘ |
| closureYear | 2008 ⓘ |
| completionOfDeepestDepthYear | 1989 ⓘ |
| continent | Europe ⓘ |
| country | Soviet Union ⓘ |
| depthRecordHeldUntilYear | 2008 ⓘ |
| designedTargetDepthInKilometers | 15 ⓘ |
| drillHoleName | SG-3 ⓘ |
| drillingChallenges |
equipment failures at great depth
ⓘ
high temperature at depth ⓘ rock plasticity and deformation ⓘ |
| drillingMethod | rotary drilling ⓘ |
| drillingStartYear | 1970 ⓘ |
| fundingSource | Soviet government ⓘ |
| hasCoordinateSystem | geographic coordinates ⓘ |
| hasFeature | multiple side branches from main borehole ⓘ |
| hasFinding |
absence of expected seismic Moho boundary at predicted depth
ⓘ
evidence of metamorphosed sedimentary rocks deep in the crust ⓘ higher than expected temperatures at depth ⓘ presence of fractured and water-bearing rocks at great depth ⓘ |
| infrastructure |
drilling tower
ⓘ
research facilities ⓘ support buildings ⓘ |
| knownFor |
extreme drilling depth
ⓘ
long-term geophysical observations ⓘ |
| location |
Kola Peninsula
ⓘ
Murmansk Oblast ⓘ northwestern Russia ⓘ |
| maximumDepthInKilometers | 12.262 ⓘ |
| maximumDepthInMeters | 12262 ⓘ |
| operator | Soviet Ministry of Geology ⓘ |
| partOf |
Kola superdeep drilling program
ⓘ
linked to:
Kola Superdeep Borehole
|
| projectEndYear | 1992 ⓘ |
| purpose |
scientific research of the continental crust
ⓘ
study of deep geological structure ⓘ study of heat flow in the crust ⓘ study of rock properties at great depth ⓘ study of seismic discontinuities ⓘ |
| record | deepest artificial point on Earth ⓘ |
| scientificDiscipline |
geology
ⓘ
geophysics ⓘ petrology ⓘ seismology ⓘ |
| startDate | 1970-05-24 ⓘ |
| status | abandoned ⓘ |
| temperatureAtBottomInCelsius | approximately 180 ⓘ |
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: Kola Superdeep Borehole Description of subject: The Kola Superdeep Borehole is a Soviet scientific drilling project in northwestern Russia that produced the deepest artificial point on Earth, reaching over 12 kilometers into the continental crust.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Kola Superdeep Borehole