dong Xianrendong - 仙人洞

Détail


Nom de la grotte : Xianrendong - 仙人洞
Province, Préfecture, District :
Yunnan 云南省, Baoshan 保山, Longling 龙陵县
Latitude Nord - Longitude Est :
24.35809 - 99.03793
Altitude (m) : 692
Développement (m) : 1 864
Profondeur (m) : 51
Profondeur - / + (m) : 51 /
Volume (m3) :
1Entrée : Xianrendong 仙人洞,

Carte



Description 1



Xian Ren Dong

Coordinates N24.35809, E99.03793). Length:1863.70m Depth:-51.34m

The entrance of the Cave Xian Ren Dong is located at 692 m a.s.l. Fume is comes out from the entrance hole because the temperature inside is 21-22°.

It is a typical karst phenomenon, formed through the system of brittle fractures that inherited the ductile fault. The cave is formed by two major cracks with direction NE- SW and SE - NW. It is developed on 3 levels: upper, middle and lower as the first two are dry and the lower active where it flows underground river. The river is formed in the massive, and it ran out to the surface through karst spring, which is located at the foot of the massif about 40 below the cave entrance.

The cave entrance has the form of semi - ellipse with dimensions 9.20 m width and 3.43 m height. Immediately after the horizontal entrance the cave became vertical – the pit after is 9.20 m long and 3.20 m wide. The depth of the pit is 8.20 m. The cave entrance is hedged with metal bar with door which usually is locked for security reasons! The vertical part of the cave is equipped with a steep metal ladder. The following passage is steep gallery with a length of 40 meters and a slope 58 o whose width is between 8 and 9 meters. The height of the gallery is up to 16 meters. The bottom of the passage is covered with jagged gravels, in the final part with stone blocks of varying sizes. Left (in the direction of the entry) and geographical in East, there is a steep section whose final part leads to the lowest water-active level of the cave. The river passage is with total length not less than 780 m. overcoming the first (initial) part of the passage is possible only with a pneumatic boat but subsequently through trampling. The width of the water passage varies between 3.50 and 4.50 m. The maximum height of the gallery reaches 16 m. In the end of the gallery its height decreases and reaches 1.60 meters and further ended with a very narrow sump. The river passage connects with the middle and upper levels of the cave in several places. It is developed an average of about eight meters below both of them. The water level is richly decorated with formations (mainly stalactites) in its middle part.

The upper level (floor) has a length of about 135 meters. It is a high, dry and flat gallery. The width and varies from 7.50 to 11.80 meters. The height is also variable 8 -14 m. In the South end the height decreases and reaches 2.80 meters. The upper level ended with pit (8.80 m deep) with which it makes connection with the middle level (Big Hall). About 12-13 meters from the start of the upper passage in the left (in the direction of entry) there are two holes (gaps) through which it connects with the water level of the cave. Shortly before the end of this section, a well-shaped natural playground right of the gallery there are cave shrine .

The pit leads to the Great Hall respectively to the Middle level of the cave. It has dimensions of 63 x 69 m and has an area of about 435.2 m 2. The height varies between 11 and 14 meters. The hall is associated with underlying lower (active) floor of the cave in several places. Three of them are pit with depth of about 8 meters. Almost the entire surface of the hall is covered with keeled stones and boulders. The dripstone formations here are relatively small, except for the western periphery of the hall there is a great variety of formations - stalactites, stalagmites, draperies and so on.

In the southwest part of the Hall leads off two dry branches that conditionally could be named "Eastern" and "Western". Eastern branch has a length of about 180 meters. Its first part it is a dry, and flat with a width ranging from 5 to 12 meters and high on average about 6 meters. The floor is covered with stone blocks, and in the final part with clay. The secondary formations are relatively less.

Western branch is shorter (74 m). The width varies from 7 to 20 meters. The floor is identical as in the Eastern section (passage). In the end, western passage connects with the water level of the cave in two places.

The temperature in the cave is 21.8 °C at a relative humidity of 96%.

According to special studies (see the Chapter "Biospeleology) the cave is habitat of 10 species of bats between prevailing Miniopterus pusillus and Miniopterus fuliginosus.

The cave is mapped in the 6-8 November 2013 the Bulgarian-Chinese team composed Al.Zhalov, K.Danailov, K.Bonev, T.Markov, Tsv.Parov, Zhang Fang and Zhoug Chunshiu.

Alexey Zhalov edited by, Chinese-bulgarian speleological expedition “Gaolingongshan 2013” in Yunnan province, China. (2016)
Gaoligonshan 2013 Expedition Report - Editors : Alexey Zhalov & Boyan Petrov. Description of the caves: Alexey Zhalov. Photos: Alexey Zhalov, Boyan Petrov, Zhang Fan. Edition of © Bulgarian Caving Society , November 2016.
Analyse :
This report details the joint Chinese-Bulgarian expedition carried out by members and friends of Bulgarian Caving Society in collaboration with the Yunnan Institute of Geography & China Exploration & Research Society (CERS)- Yunnan branch. The primary aim of the 2013 joint Chinese-Bulgarian expedition was to continue the exploration of caves in Gaoligongshan Mountain and some unexplored adjacent areas in Yunnan Province of China. Six speleologists from Bulgaria and four from China took part in the survey carried between 4 and 14th November 2013. During the expedition 14 caves with total length of 2302.60 m and depth of 379.06 m were studied and mapped. Xian Ren Dong next to MengnuozСen village was the most significant cave explored by the team. Its length was measured to be 1863.70 m. Rich cave-dwelling fauna was collected from 6 of the caves and three species of carabid beetles was proved and described as new to science.

4508 caractères - Lu 166 Fois

Bibliographie 2



Alexey Zhalov edited by, Chinese-bulgarian speleological expedition “Gaolingongshan 2013” in Yunnan province, China. (2016)
Gaoligonshan 2013 Expedition Report - Editors : Alexey Zhalov & Boyan Petrov. Description of the caves: Alexey Zhalov. Photos: Alexey Zhalov, Boyan Petrov, Zhang Fan. Edition of © Bulgarian Caving Society , November 2016.
This report details the joint Chinese-Bulgarian expedition carried out by members and friends of Bulgarian Caving Society in collaboration with the Yunnan Institute of Geography & China Exploration & Research Society (CERS)- Yunnan branch. The primary aim of the 2013 joint Chinese-Bulgarian expedition was to continue the exploration of caves in Gaoligongshan Mountain and some unexplored adjacent areas in Yunnan Province of China. Six speleologists from Bulgaria and four from China took part in the survey carried between 4 and 14th November 2013. During the expedition 14 caves with total length of 2302.60 m and depth of 379.06 m were studied and mapped. Xian Ren Dong next to MengnuozСen village was the most significant cave explored by the team. Its length was measured to be 1863.70 m. Rich cave-dwelling fauna was collected from 6 of the caves and three species of carabid beetles was proved and described as new to science.
Source :

Borislav V. Guéorguiev (2014)
Eustra petrovi sp. nov. - first record of a troglobitic Ozaenini from China (Coleoptera: Carabidae: Paussinae). Journal of Insect Biodiversity 2(10): 1-9, 2014.
Abstract: Eustra petrovi sp. nov. from China, Yunnan Province (type locality: cave Xianren Dong near to village Datianba, Longling County, Baoshan City) is described and illustrated. The new species exhibits troglomorphic features (depigmentation of tegument, brachyptery, microphthalmy) and can be separated from other species of Eustra by presenting a particular combination of character states.
Source :


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Topographie 1



topographie Xianrendong 仙人洞
Source : FBS/CERS/YIG

Expédition 1


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