Julia M. James School of Chemistry University of Sydney NSW 2006 - - PowerPoint PPT Presentation

▶
julia m james school of chemistry university of sydney
SMART_READER_LITE
LIVE PREVIEW

Julia M. James School of Chemistry University of Sydney NSW 2006 - - PowerPoint PPT Presentation

Mar 16, 2024 172 likes •497 views

Julia M. James School of Chemistry University of Sydney NSW 2006 Australia Decho People Parks Canada and Steve Catto Derek Ford and Steve Worthington Found in caves of all rock types at all latitudes and altitudes It allows

slide-1
SLIDE 1

Julia M. James School of Chemistry University of Sydney NSW 2006 Australia

slide-2
SLIDE 2

Decho People Parks Canada and Steve Catto

slide-3
SLIDE 3

Derek Ford and Steve Worthington

slide-4
SLIDE 4
  • Found in caves of all rock types at all latitudes and altitudes
  • It allows interaction between the cave atmosphere, and bedrock and

speleothems

  • Is an important water source for living organisms
  • The classic review of condensation in karst hydrology and speleogenesis is by

Dublyansky and Dublyansky

slide-5
SLIDE 5

Edmonton

No r t h e st Te r r i t

  • r

i e s w Yuko n Al aska Nahanni National Park

slide-6
SLIDE 6
slide-7
SLIDE 7
slide-8
SLIDE 8

m et r es + 6.

Central Entrance

Late July 2006

slide-9
SLIDE 9
slide-10
SLIDE 10

m et r es

slide-11
SLIDE 11

m et r es

slide-12
SLIDE 12

m et r es

slide-13
SLIDE 13
slide-14
SLIDE 14

m et r es

Edge of the Ice Fall

slide-15
SLIDE 15

Late July , 2006

slide-16
SLIDE 16

Late July , 2006 Late July, 1973

slide-17
SLIDE 17
slide-18
SLIDE 18

m et r es

slide-19
SLIDE 19

m et r es

slide-20
SLIDE 20
slide-21
SLIDE 21

Is condensation corrosion taking place in this cold climate cave? The modest evidence available indicates that it is. Next step - additional evidence from experiment and modeling . Various groups commenting on Condensation Corrosion - worldwide

  • Dublyansky and Dublansky – Caucasus and Crimea
  • Wolfgang Dreybolt and his students - Germany
  • Derek Ford and Rosemary Tharule - Lips - Neotropics
  • Peter Smart and Augusto Auler - Brazil
  • De Freitas et al. - New Zealand
  • Andy Baker et al. - UK
  • Art Palmer - USA
  • Nadja Zupan-Hajna - Solvenia
slide-22
SLIDE 22

Using the modeling program Wateq4F And making the assumption That the carbon dioxide partial pressure would be atmospheric in the Grotte Valerie Water condensing in the Grotte Valerie is aggressive to limestone and calcite. The condensed waters will be more aggressive if additional carbon dioxide and non common ions are present in t h e m

slide-23
SLIDE 23
slide-24
SLIDE 24

Langs Cave, Mulu

slide-25
SLIDE 25

Stone Horse Cave, Mulu NationalPark, Sarawak, Malaysia Lagang Cave

slide-26
SLIDE 26

Mafeking Cave Jenolan Show Caves Site Specific Considerably greater corrosion values than modeling

slide-27
SLIDE 27
slide-28
SLIDE 28

In the Grotte Valerie

  • Condensation corrosion will be seasonal – ie in the short summers.
  • The rate of condensation corrosion will be extremely slow and vary.
  • Condensation corrosion will be episodic and may have stopped in the past all

together

In general

  • For corrosion to occur condensation must be present as water
  • This puts in doubt that it occurs at all altitudes and latitudes
  • Probably the only way to prove these conclusions is by experiment
slide-29
SLIDE 29
slide-30
SLIDE 30