Gle Mon Ampeuet (also Gunung Mon Ampeuet) is an iron-ore locality in the Atjeh interior, 37 km South of Kota Radja, recorded by Jansen, Lindberg and Wolvekamp in 1922 and reproduced in Van Bemmelen’s *Geology of Indonesia* (1949). The Gle Mon Ampeuet locality is No. 2 in Van Bemmelen’s Fig. 41 key, and is the second-closest Atjeh iron-ore locality to the colonial capital (after Kr. Geuenteuet at 32 km South).
The 1922 Jansen-Lindberg-Wolvekamp observation
The 1922 report of Jansen, Lindberg and Wolvekamp, as reproduced by Van Bemmelen, records:
“Locality: 37 km South of Kota Radja. Numerous fragments of iron ore, with a core of pyrite, on the slopes. In the vicinity limestone and an eruptive rock (amphibole andesite) were observed. The presence of garnet and a silicious limestone indicates contact-metamorphic origin. The thickness of this occurrence is some metres.”
The geological description is the standard contact-metamorphic model: an eruptive rock (amphibole andesite) intruding into limestone, with the contact-metamorphic formation of garnet and silicified limestone, and the deposition of magnetite-hematite iron ore with pyrite cores at the contact zone. The same model applies to the Kr. Geuenteuet locality (5 km to the north) and to the Muara Sipongi locality across the Tapanuli border to the south; see the entry on A. Tobler for the geological theory.
Significance
Gle Mon Ampeuet is significant for the encyclopedia of Acheh history because it is one of the two Atjeh iron-ore localities closest to the colonial capital Kota Radja (the other being Kr. Geuenteuet), and accordingly one of the first Atjeh mineral localities to be recorded in the colonial geological literature. The locality’s contact-metamorphic origin — established by the 1922 Jansen-Lindberg-Wolvekamp report on the basis of the garnet and silicified limestone observed in the vicinity — places it within the same geological model that applies to all the documented Atjeh iron-ore occurrences, and accordingly within the same mineral province that extends, in the colonial geological literature, from the northern tip of Atjeh to the southern tip of Benkulen.
See Also
- Acheh
- A. Tobler
- B. B. Lindberg
- H. Wolvekamp
- Iron ores in Atjeh
- J. Zwierzycki
- Kota Radja
- Kr. Geuenteuet
- P. Hövig
- P. J. J. Jansen
- Van Bemmelen’s The Geology of Indonesia (1949)
- 1922
Source
The Geology of Indonesia, by R. W. van Bemmelen, Vol. II: Economic Geology (The Hague: Government Printing Office; Martinus Nijhoff, 1949), p. 207 (key to Fig. 41, No. 2, with locality description).