+ Translate

Evidence for silicate dissolution on Mars from the Nakhla meteorite

, : Evidence for silicate dissolution on Mars from the Nakhla meteorite. Meteoritics & Planetary Science 48(2): 224-240

Veins containing carbonates, hydrous silicates, and sulfates that occur within and between grains of augite and olivine in the Nakhla meteorite are good evidence for the former presence of liquid water in the Martian crust. Aqueous solutions gained access to grain interiors via narrow fractures, and those fractures within olivine whose walls were oriented close to (001) were preferentially widened by etching along [001]. This orientation selective dissolution may have been due to the presence within olivine of shock-formed [001](100) and [001]{110} screw dislocations. The duration of etching is likely to have been brief, possibly less than a year, and the solutions responsible were sufficiently cool and reducing that laihunite did not form and Fe liberated from the olivine was not immediately oxidized. The pores within olivine were mineralized in sequence by siderite, nanocrystalline smectite, a Fe-Mg phyllosilicate, and then gypsum, whereas only the smectite occurs within augite. The nanocrystalline smectite was deposited as submicrometer thick layers on etched vein walls, and solution compositions varied substantially between and sometimes during precipitation of each layer. Together with microcrystalline gypsum the Fe-Mg phyllosilicate crystallized as water briefly returned to some of the veins following desiccation fracturing of the smectite. These results show that etching of olivine enhanced the porosity and permeability of the nakhlite parent rock and that dissolution and secondary mineralization took place within the same near-static aqueous system.

(PDF same-day service: $19.90)

Order PDF Full Text


Click here to order any other PDF Full Text

Accession: 036744142

DOI: 10.1111/maps.12053

PDF Full Text: Submit

Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:

Other references

Uttenreuther M.; Huang C.S.; Tsui C.; Reisfeld R.A.; Gillies S.D.; Yu A.L., 1992: Comparison of biological activity and pharmacokinetics between a mouse and a human mouse anti gcd2 chimeric monoclonal antibody mab. Proceedings of the American Association for Cancer Research Annual Meeting 33: 244

Colby, C.; Mcafee, S.; Sackstein, R.; Dey, B.; Saidman, S.; Sachs, D. H.; Sykes, M.; Spitzer, T. R., 2000: Engraftment Syndrome following non-myeloablative conditioning therapy and HLA-matched bone marrow transplantation for hematologic malignancy. An Engraftment Syndrome (ES) may accompany hematologic recovery following BMT, and is often characterized by fever, rash, elevation of liver function lests, capillary leak and weight gain and non-cardiogenic pulmonary edema. Thirty-six patients wi...

Fischetti, B., 1974: Notes of a journey through Albanian agriculture. An account is presented of a visit to the southern-central part of Albania, accompanied by officials of the Albanian Ministry of Agriculture and other agricultural specialists. Emphasis is laid on the great progress which has been made in the coun...

Dehaan, J., 1980: How to collect and preserve physical evidence. Modern veterinary practice 61(2)

Jenser G., 1973: Observations on the autumn mass flight of frankliniella intonsa thysanoptera thripidae. Acta Phytopathologica Academiae Scientiarum Hungaricae 8(1-2): 227-230

Mccoy, W. F.; Hoots, J. E., 1997: Method of use of compositions of biocides and fluorescent indicators to control microbial growth. Official Gazette of the United States Patent & Trademark Office Patents 1205(5): 3800, Dec 30

Alves, M. J.; Coelho, M. M.; Collares Pereira, M. J., 1997: The Rutilus alburnoides complex Evidence for a hybrid origin. A genetic survey of 18 presumptive enzyme loci was conducted on members of the diploid-triploid R. alburnoides complex in order to test the hypothesis of hybrid origin. Most specimens examined were heterozygous at a high proportion of loci, with s...

Li Yan; Tang Zhaoyou; Ye Shenglong; Liu Binbin; Liu Yinkun; Chen Jie; Xue Qiong, 2002: Gene expression profile of human hepatocellular carcinoma cell lines with different metastatic potentials. Objective: To compare gene expression profile of human hepatocellular carcinoma(HCC) cell lines with different metastatic potentials, so as to screen for metastasis-related genes. Methods: Gene expression profile of MHCC97-L and HCCLM3, two HCC ce...

Nadereh Rashtchizadeh; Amir Ghorbanihaghjo; Hassan Argani; Saeed Mahmoudi Meimand; Javid Safa; Hamidreza Vatankhahan; Maryam Shahidi, 2012: Serum Receptor Activator of Nuclear Factor-? B Ligand, Osteoprotegrin, and Intact Parathyroid Hormone in Hemodialysis and Renal Transplant Patients. Serum receptor activator of nuclear factor-? B ligand and osteoprotegrin are mediated to vascular calcification in the general population. Our knowledge is very sparse in hemodialysis and renal transplant patients. Receptor activator of nuclear fa...

Omeric, Nurdan, 2004: Advances in periodontal disease markers. A computer-assisted medline search was conducted to find the relevant articles concerning the periodontal disease markers in gingival crevicular fluid (GCF) and saliva published during the 10-year period from 1993 to July 2003. This review suggest...