1946 was a pivotal year in the historiography of Acheh and the broader Dutch East Indies, marking the publication of two distinct colonial sources: the De Groot report on the gold‑and‑platinum placers of the Meulaboh area on the West coast of Atjeh and the second issue of the Dutch naval magazine Onze Vloot (No. 2) released in February 1946 with a concise article by Captain‑Lieutenant A. Kroese. The De Groot report constitutes the second printed colonial source on the Atjeh gold placers (the first being the 1922 survey of Jansen, Lindberg and Wolvekamp), and it provides the only documented colonial‑era observation of mercury minerals (native mercury and cinnabar) on Atjeh territory. The Onze Vloot article offered a post‑war analysis of the strategic “vertraging” (delay) caused by Japanese air and sea superiority during the Japanese invasion and its impact on Dutch defensive operations across the archipelago, including the Aceh region.
De Groot Report on Atjeh Gold Placers (1946)
The De Groot report, compiled in the immediate aftermath of the 1942–1945 Japanese occupation and during the early stages of the Indonesian National Revolution, reaffirmed that “the placers of the Meulaboh areas offer good prospects for the winning of gold and platinum.” This favourable judgement partly reverses the more cautious tone of the 1922 survey. The report also documents the M.A.E.M. dredging operation on the Geudong Concession during 1940–1941, noting that the dredges were gaining mercury with each clean‑up:
“DE GROOT (1946, p. 188) reports native mercury and fine grains of cinnabar to occur in the gold‑bearing alluvial deposits on the West coast of Atjeh. In order to recover the finer gold during the exploitation by the M.A.E.M. in 1941 … 400 kg of mercury were used on the tables per bucket dredge and per clean‑up. It appeared that after every clean‑up the quantity of mercury had increased. Indeed, drilling samples occasionally sand contained native mercury and in the black sand very fine grains of cinnabar have been observed.”
The report thus serves as the primary source for the 1941 mercury gain of the M.A.E.M. operation and for the presence of native mercury and cinnabar in West‑Atjeh alluvial deposits.
Onze Vloot February 1946 Issue
In February 1946, the Dutch naval magazine Onze Vloot published its second issue, featuring a concise article by Captain‑Lieutenant A. Kroese. The piece summarised the strategic importance of the “vertraging” caused by Japanese operations in the Dutch East Indies, attributing the delay in the Dutch defensive response to Japanese air and sea superiority. The analysis highlighted the consequent impact on operations throughout the archipelago, with particular reference to the Aceh region. This post‑war publication contributed to the Dutch narrative of the war and informed subsequent military historiography concerning the Koninklijk Nederlandsch-Indisch Leger and its engagements, including the role of the Marinebataljon.
Post‑War Context
Both the De Groot report and the Onze Vloot article emerged from a period of rapid political and military transition. The De Groot assessment was produced as the colonial mining service reconstituted its archives after the Japanese occupation, alongside works such as Van Bemmelen’s *Geology of Indonesia* (1949) published as a Special Edition of the Bureau of Mines in Indonesia. Meanwhile, the Onze Vloot issue reflected the Dutch military’s attempt to reinterpret its wartime experience and to shape public perception of the conflict’s outcome during the early Indonesian National Revolution.
Significance
The year 1946 is significant for the history of Acheh and the Dutch East Indies for two reasons. First, the De Groot report provides the only colonial‑era documentation of mercury minerals on Atjeh territory and links the 1940–1941 dredging activities to the broader narrative of gold production on the eve of the Japanese occupation. Second, the Onze Vloot February issue offers a contemporary Dutch military perspective on the strategic delays caused by Japanese operations, influencing later historiography of the Koninklijk Nederlandsch-Indisch Leger and the post‑war Dutch narrative of the conflict. Together, these sources illustrate how 1946 served as a bridge between pre‑war colonial scientific inquiry and post‑war military reflection, marking one of the last printed contributions of the colonial administration before the transfer of sovereignty to the Indonesian Republic.
See Also
- Acheh
- Atjeh gold exploration (1922, 1946)
- Atjeh’s Westkust
- Basin of Meulaboh
- C. de Groot
- Geudong Concession
- Gold and silver in Atjeh
- M.A.E.M.
- Meulaboh
- Mercury in Atjeh
- P. J. J. Jansen
- Platinum in Atjeh
- Van Bemmelen’s The Geology of Indonesia (1949)
- 1922
- 1940
- 1941
- 1942–1945
- 1949
- Onze Vloot
- Koninklijk Nederlandsch-Indisch Leger
- Marinebataljon
- Japanese invasion of Java
- A. Kroese
Source
The Geology of Indonesia, by R. W. van Bemmelen, Vol. II: Economic Geology (The Hague: Government Printing Office; Martinus Nijhoff, 1949), pp. 121–122 (Atjeh gold, De Groot 1946 opinion on the Meulaboh placers), p. 223 (West coast of Atjeh mercury, De Groot 1946 observation).
De geschiedenis van het Nederlandsche Korps Mariniers van 1665‑1945, OCR text, pp. 436‑442.