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Paper Information

Journal:   IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY   SPRING 2010 , Volume 18 , Number 1; Page(s) 147 To 160.
 
Paper: 

Mineral Paragenesis, A Key In Determination Of Physico-Chemical Conditions Of Skarnification, A Case Study, Mohammad-Abad District, Sw Yazd Province

 
 
Author(s):  Moore F.*, Sharifi R.
 
* DEPARTMENT OF EARTH SCIENCES, FACULTY OF SCIENCES, SHIRAZ UNIVERSITY, IRAN
 
Abstract: 
Mineralogical and geochemical investigations indicate two general stages of skarnification i.e, prograde and retrograde stages in the Mohammad-Abad district, south west of Yazd province. Metasomatic skarn (Prograde stage) occurred with precipitation of anhydrous calc-silicate mineral assemblages (andradite and diopside-hedenbergite) within the temperature ranges of 470 to 550oC. During the retrograde stage (<470oC) considerable amounts of anhydrous calc-silicates were altered and replaced by a series of hydrous calc-silicates (epidote, tremolite–actinolite). Finally, both anhydrous and hydrous calc-silicates were altered to fine aggregates of chlorite, calcite, quartz and clay minerals at temperatures lower than 300 oC. The absence of wollastonite among the calc-silicate assemblages may suggest that andradite and hedenbergite were crystallized from metasomatizing fluids at lower than 550 oC in the Mohammad-Abad skarn. The presence of intergrowth texture and non-replacive crystal boundaries between garnets and pyroxenes suggest that they were formed contemporaneously within the temperature and fO2 ranges of 430–550oC and 10-26–10-23, respectively. Andradite converted to quartz, calcite and magnetite below 470 oC and fO2=10-24–10-21. Since, both magnetite and pyrite along with quartz and calcite are present in mineral assemblages of sub-stage III, it can be reasoned that the metasomatizing fluids probably had an approximate fS2 10-6.5 and a temperature of about 430 oC.
 
Keyword(s): ENDOSKARN, EXOSKARN, METASOMATIC, PROGRADE ALTERATION, RETROGRADE ALTERATION
 
 
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APA: Copy

MOORE, F., & SHARIFI, R. (2010). MINERAL PARAGENESIS, A KEY IN DETERMINATION OF PHYSICO-CHEMICAL CONDITIONS OF SKARNIFICATION, A CASE STUDY, MOHAMMAD-ABAD DISTRICT, SW YAZD PROVINCE. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, 18(1), 147-160. https://www.sid.ir/en/journal/ViewPaper.aspx?id=258835



Vancouver: Copy

MOORE F., SHARIFI R.. MINERAL PARAGENESIS, A KEY IN DETERMINATION OF PHYSICO-CHEMICAL CONDITIONS OF SKARNIFICATION, A CASE STUDY, MOHAMMAD-ABAD DISTRICT, SW YAZD PROVINCE. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY. 2010 [cited 2022January23];18(1):147-160. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=258835



IEEE: Copy

MOORE, F., SHARIFI, R., 2010. MINERAL PARAGENESIS, A KEY IN DETERMINATION OF PHYSICO-CHEMICAL CONDITIONS OF SKARNIFICATION, A CASE STUDY, MOHAMMAD-ABAD DISTRICT, SW YAZD PROVINCE. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, [online] 18(1), pp.147-160. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=258835.



 
 
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