Assam–Arakan basin
E688191
The Assam–Arakan basin is a major hydrocarbon-rich sedimentary basin in northeastern India, known for its significant oil and gas reserves and complex tectonic setting along the eastern Himalayas.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Assam–Arakan basin canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7671589 — 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: Assam–Arakan basin Context triple: [Digboi oil field, geologicalBasin, Assam–Arakan basin]
-
A.
Brahmaputra Valley
The Brahmaputra Valley is a fertile, densely populated river valley in northeastern India and Bangladesh, shaped by the course and seasonal flooding of the Brahmaputra River.
-
B.
Yarlung Tsangpo River basin
The Yarlung Tsangpo River basin is a high-altitude watershed in Tibet that drains the upper reaches of the Brahmaputra River, encompassing deep gorges, extensive glaciers, and diverse alpine and subtropical ecosystems.
-
C.
Arakan
Arakan is a historical coastal region in western Myanmar, now largely corresponding to Rakhine State and known for its distinct ethnic and cultural identity.
-
D.
Pandua
Pandua is a historic city in present-day West Bengal, India, that served as an important political and cultural center during the medieval Bengal Sultanate.
-
E.
Varendra
Varendra is a historic region in northwestern Bengal, now largely in Bangladesh, known as an early political and cultural center of medieval Bengali kingdoms.
- 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: Assam–Arakan basin Target entity description: The Assam–Arakan basin is a major hydrocarbon-rich sedimentary basin in northeastern India, known for its significant oil and gas reserves and complex tectonic setting along the eastern Himalayas.
-
A.
Brahmaputra Valley
The Brahmaputra Valley is a fertile, densely populated river valley in northeastern India and Bangladesh, shaped by the course and seasonal flooding of the Brahmaputra River.
-
B.
Yarlung Tsangpo River basin
The Yarlung Tsangpo River basin is a high-altitude watershed in Tibet that drains the upper reaches of the Brahmaputra River, encompassing deep gorges, extensive glaciers, and diverse alpine and subtropical ecosystems.
-
C.
Arakan
Arakan is a historical coastal region in western Myanmar, now largely corresponding to Rakhine State and known for its distinct ethnic and cultural identity.
-
D.
Pandua
Pandua is a historic city in present-day West Bengal, India, that served as an important political and cultural center during the medieval Bengal Sultanate.
-
E.
Varendra
Varendra is a historic region in northwestern Bengal, now largely in Bangladesh, known as an early political and cultural center of medieval Bengali kingdoms.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf | sedimentary basin ⓘ |
| boundedBy |
Eastern Himalayas
NERFINISHED
ⓘ
Indo–Burman Ranges NERFINISHED ⓘ |
| contains |
Baramura gas fields
NERFINISHED
ⓘ
Digboi oil field NERFINISHED ⓘ Moran oil field NERFINISHED ⓘ Naharkatiya oil field NERFINISHED ⓘ Rudrasagar gas field NERFINISHED ⓘ Upper Assam oil fields NERFINISHED ⓘ |
| country | India ⓘ |
| discoveredHydrocarbons | late 19th century ⓘ |
| economicImportance | major petroleum-producing region of India ⓘ |
| extendsInto |
Bangladesh
NERFINISHED
ⓘ
Myanmar NERFINISHED ⓘ |
| formedBy |
India–Eurasia plate collision
ⓘ
India–Myanmar plate interaction ⓘ |
| geologicalProvince |
Assam Shelf
NERFINISHED
ⓘ
Assam–Arakan Fold Belt NERFINISHED ⓘ Naga Schuppen Belt NERFINISHED ⓘ Tripura–Mizoram Fold Belt NERFINISHED ⓘ |
| hydrocarbonSystem | Tertiary clastic reservoirs ⓘ |
| knownFor |
complex tectonic setting
ⓘ
significant oil and gas reserves ⓘ |
| locatedIn |
Arunachal Pradesh
NERFINISHED
ⓘ
Assam ⓘ Mizoram NERFINISHED ⓘ Nagaland NERFINISHED ⓘ Northeast India ⓘ Tripura NERFINISHED ⓘ |
| majorLithology |
sandstone
ⓘ
shale ⓘ siltstone ⓘ |
| notableEvent | discovery of Digboi oil field in 1889 ⓘ |
| operator |
Oil India Limited
NERFINISHED
ⓘ
Oil and Natural Gas Corporation NERFINISHED ⓘ |
| partOf | eastern Himalayan foreland region ⓘ |
| resource |
crude oil
ⓘ
natural gas ⓘ |
| sourceRockAge |
Cretaceous
ⓘ
Paleogene NERFINISHED ⓘ |
| stratigraphy |
Cenozoic sediments
ⓘ
Mesozoic sediments ⓘ Paleozoic sediments ⓘ |
| tectonicSetting |
fold-and-thrust belt
ⓘ
foreland basin ⓘ strike-slip faulting ⓘ |
| trapType |
stratigraphic traps
ⓘ
structural traps ⓘ |
| traversedBy | Brahmaputra River NERFINISHED ⓘ |
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: Assam–Arakan basin Description of subject: The Assam–Arakan basin is a major hydrocarbon-rich sedimentary basin in northeastern India, known for its significant oil and gas reserves and complex tectonic setting along the eastern Himalayas.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.