Grottes et karsts de Chine
Sur les traces de Xu Xiake
Donghedong 1 - 洞河洞1
Détail15/03/2025 9:46:56
Province, Préfecture, District :
Sichuan 四川省, Yibin Diqu 宜宾, Xingwen 兴文
Latitude Nord - Longitude Est :
28.155449 - 105.185625
Altitude (m) : 420
Développement (m) : 1 100
Profondeur (m) :
Profondeur - / + (m) : 0 /
Volume (m3) :
Carte
Description 1
Dong He Dong
The resurgence for all the cave waters of Xingwen is a gaping hole 10 m high and wide in a limestone bluff at floor level in the Daba He valley.
Gravel banks and shallow pools provide an underground highway westward. Remnants of a high level tube lie above the wide river canyon, but thus turns south before the entrance, ending close to the surface at a choke pocked by nitrate diggings. After 630 m of easy walking the cave develops into a series of swims through roof rifts of the main tube, but even these sump. The high level, with plentiful stalagmites, offers a way on, up through boulders, to emerge in a small doline where the old cave is truncated.
Another larger doline to the north has conspicuous entrances to three segments of old high level tubes, the largest with more nitrate diggings overlooked by stalagmites. The sink in the doline floor leads into Dong He Dong 2, down through boulders into a muddy passage with the roar of water ahead. The river is met cascading over boulders just above a sump. High shingle terraces on the south side offer an easy upstream walk for 400 m to where the roof lowers to a sump.
All these caves were first entered by local people. Stone steps, now largely washed out, gave easier access to the treasured nitrate workings. The resurgence cave is well ventilated, but Dong He Dong 2 has seriously bad air, due to pyrite oxidation, trapped below its single entrance.
WALTHAM, A.C; WILLIS, R.G. (eds.) (1993): Xingwen. China Caves Project 1989-1992.-
Bridgwater TA7 0LG, British Cave Research Association. 48pp. (maps, photos, surveys) (chinese abstract). ISBN 0-900265-15-9.
Analyse : BBS
A report on various projects: The Pan Yang Caves, Bama, Guangxi Province 1989. The Mengzi karst of southern Yunnan 1991. The karst of the Tibet Plateau 1992 and the largest part, the exploration of the Xingwen karst of Sichuan Province 1992. Geomorphol. map of Karst of Xingwen, Sichuan. Cave surveys of : Zhucaojing (Xingwen, Sichuan): 8,80 km +1,75 km; Tiencuan dong (Xingwen, Sichuan): 8,10 km /-208 m; Xia Dong (Xingwen, Sichuan): 2,20 km; Yanzi Luo Shui Dong (Xingwen, Sichuan): 1,80 km /- 316 m + 1,12 km / -199 m; Pan Yang Dong cave system (Bama Guangxi). (RM).
1429 caractères - Lu 8 Fois
Bibliographie 2
WALTHAM, A.C; WILLIS, R.G. (eds.) (1993): Xingwen. China Caves Project 1989-1992.-
Bridgwater TA7 0LG, British Cave Research Association. 48pp. (maps, photos, surveys) (chinese abstract). ISBN 0-900265-15-9.
A report on various projects: The Pan Yang Caves, Bama, Guangxi Province 1989. The Mengzi karst of southern Yunnan 1991. The karst of the Tibet Plateau 1992 and the largest part, the exploration of the Xingwen karst of Sichuan Province 1992. Geomorphol. map of Karst of Xingwen, Sichuan. Cave surveys of : Zhucaojing (Xingwen, Sichuan): 8,80 km +1,75 km; Tiencuan dong (Xingwen, Sichuan): 8,10 km /-208 m; Xia Dong (Xingwen, Sichuan): 2,20 km; Yanzi Luo Shui Dong (Xingwen, Sichuan): 1,80 km /- 316 m + 1,12 km / -199 m; Pan Yang Dong cave system (Bama Guangxi). (RM).
Source : BBS
WALTHAM, Tony; BROOK, Dave; BOTTRELL, Simon (1993): The Caves and Karst of Xingwen, China.-
Cave and Karst Science vol.20 nr.3 / Dec 1993: 75-86 (maps, photos, surveys).
Xingwen is a spectacular karst formed on a limestone escarpment in Sichuan investigated by the China Caves Project in 1992. Over 26 km of cave has been mapped, including some very large fossil passages, and there is considerable scope for further exploration. Cave inception and development has been controlled closely by the geology, and a remarkable large proportion of the caves were initiated on the same bedding plane. The limestone surface has areas of young pinnacle karst and older cone karst. Two giant dolines have formed where ancient caves have been breached by sinkhole shafts. Between them, the surface and underground of Xingwen provides a textbook example of karst development on a remarkable scale. (AUTHORS; RM).
Source : BBS
Images 0
Topographie 1
Source : Ccp
Expédition 1
Cette grotte a été identifiée ou explorée au minimum par cette (ces) expédition (s) :
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