Editing Olivine (section)

==Weathering==
[[File:Iddingsite.JPG|thumb|Olivine altered to iddingsite within a [[Mantle (geology)|mantle]] [[xenolith]].]]

Olivine is one of the less stable common minerals on the surface according to the [[Goldich dissolution series]]. It alters into [[iddingsite]] (a combination of clay minerals, iron oxides and [[ferrihydrite]]) readily in the presence of water.<ref>{{cite journal | author1 = Kuebler, K. | author2 = Wang, A. | author3 = Haskin, L. A. | author4 = Jolliff, B. L. | url = http://www.lpi.usra.edu/meetings/lpsc2003/pdf/1953.pdf | title = A Study of Olivine Alteration to Iddingsite Using Raman Spectroscopy | journal = Lunar and Planetary Science | year = 2003 | volume = 34 | page = 1953 | url-status = live | archive-url = https://web.archive.org/web/20121025024139/http://www.lpi.usra.edu/meetings/lpsc2003/pdf/1953.pdf | archive-date = 2012-10-25 | bibcode = 2003LPI....34.1953K}}</ref> Artificially increasing the weathering rate of olivine, e.g. by dispersing fine-grained olivine on beaches, has been proposed as a cheap way to sequester CO<sub>2</sub>.<ref>{{cite web |author1= Goldberg, Philip |author2= Chen Zhong-Yin |author3= Connor, William'O |author4= Walters, Richards |author5= Ziock, Hans |title= CO2 Mineral Sequestration Studies in US |date= 2001 |url= https://www.netl.doe.gov/publications/proceedings/01/carbon_seq/6c1.pdf |url-status= dead |archive-url= https://web.archive.org/web/20161221131438/http://www.netl.doe.gov/publications/proceedings/01/carbon_seq/6c1.pdf |archive-date= 2016-12-21 |access-date= 2016-12-19}}</ref><ref>{{cite web|author1=Schuiling, R.D.|author2=Tickell, O.|title=Olivine against climate change and ocean acidification|url=http://www.innovationconcepts.eu/res/literatuurSchuiling/olivineagainstclimatechange23.pdf|url-status=dead|archive-url=https://web.archive.org/web/20160927013859/http://www.innovationconcepts.eu/res/literatuurSchuiling/olivineagainstclimatechange23.pdf|archive-date=2016-09-27|access-date=2016-12-19}}</ref> The presence of iddingsite on Mars would suggest that liquid water once existed there, and might enable scientists to determine when there was last liquid water on the planet.<ref>{{cite journal | last1=Swindle | first1=T. D. | last2=Treiman | first2=A. H. | last3=Lindstrom | first3=D. J. | last4=Burkland | first4=M. K. | last5=Cohen | first5=B. A. | last6=Grier | first6=J. A.|author6-link=JA Grier | last7=Li | first7=B. | last8=Olson | first8=E. K. | title=Noble Gases in Iddingsite from the Lafayette meteorite: Evidence for Liquid water on Mars in the last few hundred million years | journal=Meteoritics and Planetary Science | year=2000 | volume=35 | issue=1 | pages=107–15 | doi=10.1111/j.1945-5100.2000.tb01978.x | bibcode=2000M&PS...35..107S| doi-access=free }}</ref>

Because of its rapid weathering, olivine is rarely found in [[sedimentary rock]].<ref>{{cite journal |last1=Velbel |first1=Michael A. |title=Dissolution of olivine during natural weathering |journal=Geochimica et Cosmochimica Acta |date=October 2009 |volume=73 |issue=20 |pages=6098–6113 |doi=10.1016/j.gca.2009.07.024|bibcode=2009GeCoA..73.6098V }}</ref>