Tafkin Ngozi
| Tafkin Ngozi | |
|---|---|
 | |
| General information | |
Height above mean sea level (en)  | 2,622 m |
| Yawan fili | 4.6 km² |
| Vertical depth (en) | 74 m |
| Labarin ƙasa | |
 | |
| Tsarin Daidaiton Labarin Kasa | 9°02′S 33°32′E / 9.03°S 33.53°E |
| Mountain system (en) |
Poroto Mountains (en) |
| Kasa | Tanzaniya |
.jpg)
Samfuri:Infobox body of waterTafkin Ngozi (ko Tafkin Ngosi [1]) shine tafkin crater na biyu mafi girma a nahiyar Afirka. [2] Ana iya samunsa kusa da Tukuyu, wani karamin gari a cikin gundumar Rungwe, Yankin Mbeya, na kudancin kasar Tanzania a Gabashin Afirka. Yana daga cikin tsaunukan Poroto kuma iyakar arewacin caldera ita ce mafi girman matsayi a cikin kewayon. Caldera galibi ya ƙunshi lavas na trachytic da phonolitic. Ngozi wani caldera ne na Holocene wanda ya haifar da Kitulo pumice shekaru 12,000 da suka gabata a lokacin Fashewar Plinian, mai yiwuwa a cikin wannan fashewar da ta haifar da caldera. Sauran ajiyar fashewa sune Ngozi Tuff (kasa da shekaru dubu da suka gabata) da kuma ajiyar tushe na Ituwa Surge na shekarun da ba a tabbatar da su ba, amma matsakaici ga Kitulo pumice da Ngozi Tuck. Ayyukan mafi ƙanƙanta sun haifar da kwararar pyroclastic wanda ke gudana zuwa kudu na kilomita 10 a kusa da 1450 AZ. Wasu ƙwayoyin wuta sun kewaye dutsen mai fitattun wuta. Ganuwar caldera tana da gandun daji, ban da sassan da aka share ta hanyar rushewa da tsaunuka masu tsawo waɗanda ke hana samun ruwa. Caldera na ciki yana da gandun daji tare da Maesa lanceolata, Albizia gummifera da Hagenia abyssinica, itace da ke da ƙananan nau'o'in fiye da tsaunuka makwabta da suka dace da asalin asalin asalin dutsen mai fitattun wuta. Caldera kanta ba ta ƙarƙashin aikin hydrothermal ba, amma manyan hayakin CO2 da tatsuniyoyin gida na ikon kashe tafkin sun nuna haɗarin fashewar limnic. Gidan tafkin bisa ga echoosunding yana da faɗi kuma ba shi da terraces.[3][4]
Tafkin ba ya fuskantar babban canji a matakin tafkin, tare da ƙananan bambance-bambance tsakanin lokutan bushewa da ruwan sama. Yanayin iska sama da tafkin yana kusa da 18 ° C tare da ƙananan bambance-bambance na yanayi.[3]
A wasu lokuta, masu farautar Safwa sun mamaye gandun daji. Rahotanni a cikin 2013 sun bayyana cewa a cikin shekara mai zuwa aikin geothermal zai fara a kusa da dutsen mai fitattun wuta a tsakiyar tsakanin Ngozi da garin Mbeya.[2][3]
Labaran Gida da Labaran Jama'a
[gyara sashe | gyara masomin]Akwai tatsuniyoyi da tatsuniyoyin da ke kewaye da tafkin dutsen wuta, da kewayen yankin.
Mutanen Nyakyusa (ƙabilar a wannan yanki na Kudancin Tanzania) sun ce an kori wani shaman mai suna Lwembe daga ƙauyen haihuwarsa (Ukwama a yankin Makete) zuwa ruwan Tafkin Ngozi bayan mutane sun gaji da yanayin yaudara na sihirinsa.
Da zarar Lwembe ya zama mazaunin gefen ruwa, shanu na ƙabilar sun fara ɓacewa. An ce mazauna ƙauyen sun fara ɓacewa idan sun yi kusa da ruwa. Dattawan Nyakyusa sun kori yankin ta hanyar mirgine babban dutse wanda aka sanya a cikin zuciyar wuta na kwana uku a cikin ruwa, yayin da suke jefa nasu sihiri. Tun daga wannan lokacin, mummunar sihiri a kan Tafkin ba ta dawo ba.
Labarin da aka fi ji da labari na gargajiya shine na ƙungiyar sojojin mulkin mallaka na Jamus waɗanda suka zubar da dukiya a cikin ruwan tafkin. Sun sanya sihiri a kan Tafkin don kare zinariya kuma su hana duk wani yunkurin wasu mutane don dawo da shi. Wasu bambance-bambance na almara sun nuna cewa wannan ya haifar da fitar da iskar gas mai guba (wanda yanzu muka san zai iya danganta da Fashewar Limnic), yayin da wasu ke da'awar cewa akwai maciji mai kai goma sha biyu wanda ke kare dukiyar kuma yana fitowa a saman a kwanakin rana. Ko akwai dukiya har yanzu asiri ne.
manazarta
[gyara sashe | gyara masomin]- ↑ "Lake Ngosi - Tanzania Tourism". www.tanzaniatourism.go.tz. Archived from the original on 2021-04-17. Retrieved 2021-03-30.
- ↑ 2.0 2.1 "Tanzania to start geothermal exploration at Lake Ngozi in 2013". Think Geoenergy. Archived from the original on 13 January 2015. Retrieved June 29, 2015.
- ↑ 3.0 3.1 3.2 Manuëlla Delalande-Le Mouëllica; Fabrizio Gherardi; David Williamson; Stephen Kajula; Michael Kraml; Aurélie Noret; Issah Abdallah; Ezekiel Mwandapile; Marc Massault; Amos Majule; Laurent Bergonzini (March 2015). "Hydrogeochemical features of Lake Ngozi (SW Tanzania)". Journal of African Earth Sciences. 103: 153–167. doi:10.1016/j.jafrearsci.2014.11.004.
- ↑ Nils Lenhardt; Gert-Jan Peeters; Athanas S. Macheyeki (April 2015). "The Ituwa Surge deposits of the Holocene Ngozi caldera, Mbeya Region, Tanzania". International Journal of Earth Sciences. 104 (3): 749–751. doi:10.1007/s00531-014-1113-7.
|hdl-access=requires|hdl=(help)