Sumantri

Sumantri
The North Wall Firn glacier with Sumantri (sharp peak, center) and Ngga Pulu (flat peak, right).
Elevation	4,870 m (15,980 ft)
Prominence	350 m (1,150 ft)
Location
Sumantri Papua Province, Indonesia
Range	Sudirman Range
Coordinates	4°03′43″S 137°11′06″E / 4.06194°S 137.18500°E / -4.06194; 137.18500Coordinates: 4°03′43″S 137°11′06″E / 4.06194°S 137.18500°E / -4.06194; 137.18500
Climbing
First ascent	February 1962
Easiest route	rock/snow/ice climb

Sumantri (also spelled Soemantri or Soemantri Brodjonegoro^[1][2]) is a sharp mountain in the western Sudirman Range (New Guinea), it rises 4,870 metres (15,978 ft).

The peak is approximately 2 km northeast of Carstensz Pyramid (4,884 m), the highest mountain of Oceania. The north side of Sumantri is dominated by tremendous cliffs, part of the Noordwand (North wall) of the Carstensz Massif, that wrap around onto both the eastern and western sides of the mountain. Remnants of the once mighty North Wall Firn still cling tenuously to the southern aspects of the peak. It is unlikely that this ice will last for more than the next fifteen years.^[2]

Name

Before 1973 the summit was known as the NW summit of Ngga Pulu. The 1936 Carstensz Expedition also called it the "Second Peak of the North Wall".^[3] Heinrich Harrer labeled it Ngapalu on his map drawn in 1962, while calling the SE Peak of Ngga Pulu Sunday Peak. Describing his ascent of both peaks in 1972, Dick Isherwood followed this nomenclature, using Ngga Poloe for what is now Sumantri and Sunday Peak for what is now known as Ngga Pulu.^[4] The Indonesian government renamed the NW summit after professor Sumantri Brodjonegoro , Minister of Energy and Mineral Resources of the Republic of Indonesia, after he had died in office in 1973 at the age of 47.

Climbing History

The neighboring and at the time higher SE summit of Ngga Pulu was first climbed by a Dutch expedition in 1936 (Anton Colijn, Jean Jacques Dozy and Frits Wissel)^[3] The NW summit was first climbed in February 1962 by Heinrich Harrer, Philip Temple, Russel Kippax and Bert Huizenga after their first ascent of Carstensz Pyramid.

The 600 m high north cliff was first climbed by Reinhold Messner in a solo effort on 27 September 1971, after he had second-ascended the Carstensz Pyramid with his client Sergio Bigarella earlier in the week.^[5] A year later Leo Murray, Jack Baines and Dick Isherwood climbed both peaks of Ngga Pulu and found the peg that Meisner had left behind on top of the North Face of what they called Ngga Poloe (now Sumantri).^[4][5]

Geology and glaciers

The mountains of Central New Guinea are being formed as the Australian and Pacific Plates collide, resulting in both subduction and uplifting. The rocks at the surface for the peaks in this range are made of limestone, as a result, even though the summit block of the peak looks extremely daunting, it is actually an fairly easy scramble.

Due to the melting of the Northwall Firn from the SE peak of Ngga Pulu, this summit is now the highest point of the north ridge of Mount Carstensz. Furthermore, due to the complete vanishing of the Meren Glacier, its topographic prominence has increased from what would have been ~200 m to ~350 m, Sumantri could be considered the second highest independent mountain of Oceania and it features on some Seven Second Summits lists.^[6][7][8][9]

References

External links

• SummitPost.org: Sumantri - Climbing, Hiking & Mountaineering