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SUMMARY:SECONDARY MINERAL FORMATION MONDMILCH FROM BOTOVSKAYA CAVE (EASTER
 N SIBERIA)
DTSTART;VALUE=DATE-TIME:20200713T140400Z
DTEND;VALUE=DATE-TIME:20200713T140500Z
DTSTAMP;VALUE=DATE-TIME:20260416T023105Z
UID:indico-contribution-1844@indico.inp.nsk.su
DESCRIPTION:Speakers: Yulia Sholokhova (IGC SB RAS)\nMondmilch\, or moon m
 ilk\, is a special type of speleothems (secondary mineral formations forme
 d in a cave environment from a primary mineral as a result of physical and
  chemical reactions). This mineral formation is a soft clay-like substance
  with a high water content\, which becomes fluid when touched. In caves\, 
 mondmilch is found in the form of covers\, leaks\, lumps on the walls and 
 on the floor\, extensive deposits and small solitary formations. The compo
 sition of moon milk dependes on the rocks in which the underground cavity 
 is located. It can be carbonate\, gypsum\, aluminosilicate and phosphate [
 Chirienco\, 2004].\nThe questions of the moon milk origin and the variabil
 ity of its crystalline structure are con-troversial. It remains uncertain 
 as the thixotropic characteristics (fluidity) of the sediment and water co
 ntent are changing in accordance with the features of the crystals formed 
 the formation. It is possible that there are some regularity between the c
 omposition\, structure of the crystals and the physical properties of this
  type of sediment. There is also a hypothesis about the biogenic origin of
  the moon milk. It is known that microorganisms of different physiological
  groups were found in the secondary formation content [Hill\, Forti\, 1997
 ]\, and it can be assumed that microorganism cells can act as crystallizat
 ion centers during the formation of moon milk\, but the hypothesis that th
 e microbiota is secondary in the content of moon milk and the sedimentatio
 n is its habitat.\nThis paper presents the data on chemical composition an
 d morphology of crystals of the samples of moon milk (mondmilch) from Boto
 vskaya cave\, which is the largest in Russia. It was determined that moon 
 milk is characterized by increased concentrations of Ca and Sr and lower c
 ontents of Ti\, Mn and Fe relatively to the host rocks. The morphology of 
 mondmilch crystals indicates that the genesis of this secondary mineral fo
 rmation is based on both abiogenic and biogenic mechanisms.\nIt should als
 o be noted that this type of sediment has been studied using the XRF SR me
 thod for the first time. The examination of sampled specimens provides new
  information on  chemical composition and structure of moon milk in caves 
 of carbonate karst.\nThis work is partially supported by RFBR grant №13-
 05-90780.\nReferences\nChirienco M. The crystalline phase of the carbonate
  moonmilk: a terminology approach // Acta carstologica\, 33/1\, 2004. p. 2
 57-264.\nHill C. A.\, Forti P.\, Cave minerals of the world // NSS. Huntsv
 ille\, 1997. p. 463.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1
 844/
LOCATION:
URL:https://indico.inp.nsk.su/event/24/contributions/1844/
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