Sulfuric acid cave

Sulfuric acid kogon kogo ne da aka kafa lokacin da ruwan ƙasa ya ƙunshi sulfuric acid (  ) ya zo cikin hulɗa tare da bedrock carbonate, yana haifar da fanko a cikin dutsen. 

 Geochemistry da samuwar 
Sulfuric acid wanda ke haifar da sulfuric acid speleogenesis galibi ana samun shi daga iskar oxygen da narkar da hydrogen sulfide (  ). Wannan  kuma an samo shi ne daga ragewar thermal ko microbial sulfate, ko da yake wani lokacin magmatic ne.  Ragewar sulfate na thermal shine yanayin yanayi mai zurfi (2.5 zuwa 6 km zurfi, 100 ° C ko zafi) yayin da rage yawan sulfate na microbial ya fi yawa a cikin shallower, yanayin sanyi, inda yake da sanyi isa ya zama maraƙi ga microbes. Duk nau'ikan raguwar sulfate suna dogara ne akan kasancewar sulfates da kuma kasancewar abubuwan halitta (sau da yawa hydrocarbons) daga laka don aiki azaman masu ba da gudummawar lantarki . 

Lokacin da ruwan karkashin kasa dauke da narkar da hydrogen sulfide ya gamu da yanayi mai sanya kuzari (ruwa mai iskar oxygen, kogon da ya riga ya kasance),  yana oxidized zuwa cikin sulfuric acid. Wannan yawanci tsari ne na oxide, kodayake a cikin mahalli marasa iskar oxygen, madadin masu karɓar lantarki kamar nitrate na iya ƙyale abin ya ci gaba.  Sulfide ma'adanai kamar pyrite da galena na iya kasancewa a cikin dutsen mai masaukin carbonate, kuma akai-akai oxidized cikin sulfuric acid tare da ko a maimakon haka. 

Da zarar sulfuric acid ya kasance, ya fara narkar da dutsen mai masaukin carbonate:



The  /carbonic acid da aka saki ta wannan amsa na iya ci gaba da lalata dutsen mai masaukin baki da kansa, kamar yadda yake a cikin speleogenesis na carbonic acid . Narkar da sulfate anions da ƙarfe cations daga nan su fara hazo zuwa cikin ma'adanai sulfate kamar gypsum. 

Sulfuric acid speleogenesis yana faruwa da sauri; manyan kogo na iya samar da wannan hanya a cikin 'yan shekaru dubu, 1000 zuwa 2000 sau da sauri fiye da carbonic acid speleogenesis.  


 Tsakanin ƙananan ƙwayoyin cuta 
Microbes suna da matukar muhimmanci ga samar da H 2 S a cikin wurare masu sanyi inda rage yawan sulfate na thermal ba zai yiwu ba, kuma sau da yawa suna barin yatsa a cikin nau'i na raguwa na isotopes sulfur ; ƙarancin rabo na  shine halayyar raguwar sulfate microbial wanda ke haifar da samuwar sulfuric acid. 

 Sa hannu 

 Stable isotopes 

 Sulfur 
Matsakaicin isotope na sulfur a maye gurbin gypsum da sauran samfuran sulfuric acid speleogenesis na iya nuna abin da ya faru a baya.

 Oxygen 
Ana iya amfani da iskar oxygen don sanin asalin ruwan sulfuric wanda ya haifar da speleogenesis na sulfuric acid.

 Ma'adanai 
Samuwar gypsum na biyu yana daya daga cikin alamun da aka fi sani da sulfuric acid speleogenesis. Sauran ma'adanai waɗanda akai-akai suna samuwa daga wannan tsari sune ma'adinan sodium sulfate, dolomite da celestine .

 Manazarta