From: Jihua Hao Sent: Monday, March 21, 2016 12:07 To: Robert Hazen Cc: Sergey V. Krivovichev; Jesse H. Ausubel; Downs, Robert T - (rdowns); Daniel Hummer; Edward Grew; Chao Liu; Morrison, Shaunna - (shaunnamm); Grethe Hystad; Xiaogang Ma; Michael Meyer; Paul Falkowski; Dimitri Sverjensky; Elisha K. Moore; Peter Fox; Golden, Joshua J - (jgolden); Sophie Kolankowski Subject: Re: Paper idea--mineral rarity biosognatures Yes, we can. Can anyone send me a list of copper minerals? Thanks a lot, Jihua ________________________________________________________________ Predoctoral Associate in Geophysical Laboratory, Carnegie Institution of Washington, 4th-year PhD student in Johns Hopkins University, Address: 5251 Broad Branch Rd,NW, Washington, DC, 20015-1305, USA Phone: (+1)202-478-8967 (office); (+1)443-240-3582 (mobile). Email: haojihua@gmail.com (personal); jhao3@jhu.edu (school). Skype Username: jihua.hao Homepage: https://my.jh.edu/people/jhao3/ Keck: http://dtdi.carnegiescience.edu/ On Mon, Mar 21, 2016 at 11:48 AM, Robert Hazen wrote: Can we do copper minerals in this way? We're building a comprehensive data resource now, and that would be a great test case. On another point, related to our paragenetic mode discussions, I wrote David London (Univ. Oklahoma) about the sources of P in igneous rocks. Here's his answer: "Hi Bob, You might agree that what goes around comes around, and that crustal recycling is responsible for some fraction of the carbon that comes backto the crust from mantle sources. So the same might be true of phosphorous in highly-evolved peralkaline intrusions, like Ilimaussauq, that are so incredibly phosphorus-rich. Otherwise, the only other source for phosphorus in those intrusions must be the mantle. Not so for the P-rich complex Li pegmatites. What little I have to say about sources can be found on pages 24, 158-163, and 187-188 of my book, which mostly draws from published articles. By way of explaining the P-rich character of complex Li pegmatites that are derived from the partial melting of marine sedimens, I note: (1) high abundance of P in black shales (a biogenic source most likely); (2) the high solubility of P in peraluminous melts (ie, first formed by the melting of Ms-Pl-Qtz) as derived from the anatexis of aluminous gneisses and schists of marine protoliths; (3) the high An content of neoblastic plagioclase, formed during the anatectic event, in relation to the Pl norm in the whole rock. Some of the Ca for early Pl comes from the dissolution of apatite. This (the removal of Ca from melt by Pl) reduces the Ca:P ratio below that of apatite, which ensures that some P will form other phosphates (eg, montebrasite) at the end of the line in pegmatites. So to answer your question, insofar as the phosphorus of marine sediments is biogenic, then that is the source of P for the complex Li pegmatites that would fit Cerny's LCT family. Not all of the Li-rich pegmatites of that (Cerny's) affinity have the source character of marine sediments. In addition to Li, I use enrichment in P and in Cs as signature characteristics. DL David London Stubbman-Drace Presidential Professor, Norman R. Gelphman Professor of Geology, and Director, Electron Microprobe Laboratory School of Geology & Geophysics, University of Oklahoma 100 East Boyd Street, Room 710 Sarkeys Energy Center Norman, Oklahoma 73019 Electron Microprobe Laboratory: http://ors.ou.edu/Microprobe/OUEMPLhome.html (405) 325 3253 (o) (405) 325 3140 (f)" Best to All, Bob On Mon, Mar 21, 2016 at 11:02 AM, Jihua Hao wrote: Dear Bob et al., Sorry for the late reply. Just discussed briefly with Dimitri about this topic. Both Dimitri and I thought that gibbs free energy of formation (delta-Gf) of aqueous cations may be a potentially useful thermodynamic parameter. Or, as we discussed before, the addition of delta-Gf of ions that compose the minerals. I think it is better to select one set of interesting minerals to try those methods firstly before putting them all into the analysis. Thanks, Jihua ________________________________________________________________ Predoctoral Associate in Geophysical Laboratory, Carnegie Institution of Washington, 4th-year PhD student in Johns Hopkins University, Address: 5251 Broad Branch Rd,NW, Washington, DC, 20015-1305, USA Phone: (+1)202-478-8967 (office); (+1)443-240-3582 (mobile). Email: haojihua@gmail.com (personal); jhao3@jhu.edu (school). Skype Username: jihua.hao Homepage: https://my.jh.edu/people/jhao3/ Keck: http://dtdi.carnegiescience.edu/ On Thu, Mar 17, 2016 at 2:07 PM, Robert Hazen wrote: Dear Jihua et al., I think we can imagine numerous parameters related to each mineral species to test for correlations: Age Many different compositional parameters (specific elements; combinations of elements) Crustal abundance of incorporated elements Oxidation states Chemical complexity (number of essential elements) Rarity Paragenetic mode Tectonic setting primary vs. secondary abiotic vs. biogenic And are there thermochemical or geochemical parameters we should be considering as well? What's missing? The key is to bring a fully populated mineral data resource to RPI in June and then brainstorm while learning how to interrogate data in creative ways and visualize the results. Should be a very dynamic workshop! Bob On Wed, Mar 16, 2016 at 1:41 PM, Jihua Hao wrote: Dear all, After looking through the emails, I agree that it is a great idea to search biosignature from distributions of rare minerals. One thing came to my mind was that, we talked biological activities prefer to use some trace elements, like Mo, Re, Co etc, in biological activities, but dislike some too, like Hg, As etc. I’m wondering if these biological preferences will affect the distribution of those rare minerals. Or, can we tell this preferences from the distribution of rare minerals? Thanks, Jihua On Mar 15, 2016, at 4:43 PM, Robert Hazen wrote: FYI, 6 hours on trains to/from NYC tomorrow. Will start on volume IV of the Handbook of Mineralogy (arsenates, phosphates, vanadates), as that's in some ways easiest. Numerous oxidized ore minerals (category 82). Best, Bob -- Robert M. Hazen Senior Staff Scientist, Geophysical Laboratory Executive Director, Deep Carbon Observatory 5251 Broad Branch Road NW Washington, DC 20015 phone: 202-478-8962 e-mail: rhazen@ciw.edu Personal web site: http://hazen.gl.ciw.edu DCO website: deepcarbon.net Keck Deep-Time Project website: http://dtdi.carnegiescience.edu