The rare mineral stichtite is reported for the Campo Formoso ultramafic complex (Brasil), Mysore District Nuggihalli (India), and the Hatrurim Formation (Israel). Anyone out there have samples they could provide for isotope analysis? Any information on the ages of these deposits?
Dear Dr. Melchiorre,
have you also directed your view to the Mount Dundas mineral site in Tasmania ?
Best regards
H.G.Dill
I was just going to say exactly the same thing as Prof. Dill! I should have some tiny pieces somewhere. Which isotopes were you thinking of measuring?
I have plenty of stichtite from Tamania from past visits (and a pending trip in November). Have all the Tasmania localities, except Birches Inlet. Was told I need a boat to get to that site! Plan or writing up results of the Tasmania work (and work on African stichtite) over my present research sabbatical, so stay tuned!
I have been doing H-O-C stable isotope measurements on the stsichtite (see my article Chemical Geology 367:63-69) using an isotope probe for micro-analysis of small domains. Since I have data for all the common localities, I am looking now for samples from the rare sites. Samples from Israel would be a big help, but not much information was found about this locality on Mindat.org and the one sample I got from a mineralogist there turned out to be devoid of stichtite (it was Cr-clinochlore).
In the Bou Azzer ophiolite - Neoproterozoic - there is a perfect coarse-grained stichtite in a serpentinized peridotite (see the attached photo). There is no publication on this type of Moroccan stichtite, it can be used to do something with this regards.
Ahmed
Ahmed- those are magnificent specimens! Classic stichtite replacement of what I assume is chromite! How may I obtain a few small specimens? I only need a few thumbnail-sized chips (does not need to be all stichtite) for the isotope and geochemistry work. Thanks for the information on this locality! --Erik
Hi Erik,
It is my pleasure to provide you with the sample, but unfortunately I am now working in Saudi Arabia, while the samples are in Egypt. I will try to find out the samples during the mid-year vacation, may be in next February.
I am so sorry for such inconvenient for moment.
Ahmed
No problem! Many thanks for your assistance. My mailing address is:
Dr. Erik Melchiorre, Geology Department,
California State University
5500 University Parkway
San Bernardino, CA 92407 USA
Dear Dr. Melchiorre,
In the Esfandagheh(Haji Abad) ophiolite ,South of Iran,Late Cretaceous–Early Paleocene - there is (first report) a stichtite in a serpentinized peridotite (see the attached photo). There is no publication on this type of Iranian stichtitethis regards.
Mirsaleh
Mirsaleh,
Many thanks for the information. I will add that to the data base of localities.
Best Regards, Erik
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