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... "3 \"" 8 A >"()9 8 '%% X 6% > *,. k ;& 'G "B* * r"i #,s 3 %& %"~" kœ.+ %"I 8,. [ ] ^, %& " # B # B* * %& " # @ 6m '9 Q. ( kœ ),)m * 'a ^ )6m* [3] Rutner A., Nabavi M. H., Alavi M., "Geology of the OzbakKuh Mountains (Tabas area, East Iran)", Geological Survey of Iran, (96) 33. [4] Stocklin J., Eftekharnezhad J., HushamandZadeh A., 99, "Geology of the Shotori Range (Tabas area, East Iran)", Geological Survey of Iran Report No. 3 (99) 69. [] Maliva R., Siever R., "Mechanisms and controls of silicification of fossils in limestones", Journal of Geology 96 (988) 387398. [6] Maliva R.G., "Silicification in the Belt Supergroup (Mesoproterozoic), Glacier National Park, Montana, USA", Sedimentology 48 (2) 887 896. [7] Pope M., "herty carbonate facies of the Montoya Group, southern New Mexico and western Texas and its regional correlatives a record of Late Ordovician paleoceanography on Palaeogeography, southern Laurentia", Palaeoclimatology, Palaeoecology 2 (24) 367 384. [8] Tobin K. J., "A survey of Paleozoic microbial fossils in chert", Sedimentary Geology 68 (24) 7 7. [9] Schmitt J. G., Boyd D.., "Pattern of silicification in Permian pelecypods and brachiopods from yoming", Journal of Sedimentary Petrology (98) 29738. [] Bullen S. B., Sibley D. F., "Dolomite selectivity and mimic replacement", Geology 2 (984) 668. [] Popp B. N., Anderson J. F., Sandberg P. A., "Textural, elemental and isotopic variation among constituents in Middle Devonian limestones, North America", Journal of Sedimentary Petrology 4 (986), 7727. [2] Bathurst R. G.., "arbonate sediments and their diagenesis", Second enlarged edition, Elsevier Scientific Publishing ompany, New York, (97) 68. [3] Hein J. R., Karl S. M., "omparison between Open Ocean and continental margin chert * P "N 9 6 "3 9 46 DE* c *.' * '& %& T" A 4* 6 %") G >;. *,Q A'"I,% < T"% B, '% #* ' H " \%G 6(* 8 A 8*,G A'"I,% (;. ; "" T 7 B*'.'%A X2 A 6(* 8 A %& %") G T9 *, U, 8* 6(* 8 A,; * P "6* * %") G T9 *, 8 '%% X 6% ' *,9 ; T " Kp* V 9 * 6 "3 b * &. * \3 DE*, ^ 46 "2* 2 %" '9 b * & %") G " & V 9 * * BH / " ; ƒ[ d 6&* 6)" 8 A> 9T " * %& " 2 T" B* *' G * 6(* K} 8 "2 U, "" '% * A,3,"* D" 9 %* 8* 8 6)" %9 'A*,& A,3,"* >"P #* * < T"% Q A,3,"* 8* 6& U, A8* B* *' G 6(* T.'& ^*,G, * * 62 ], 2 * (; * * Y 8 '%% X 6%,6 '% * * A'"I,% A,3,"* >"P 3,( (" fq ; #* %") G '% * *. * A ", 9 AB G.' * 6&*,Q "" 8 ' '3 ABH 9< #* 6(* 8 A T 8 A'% * K9 * ")"3 4",,6)"& ' # 4 ("6 O,G '& %") G T9 *, "" b * &, "" 8 ' '3 #*.' * '& >"()9 <(2 + + 4.*,K. 2 8,,.+ ^, 8'"I,% 8 A P "..+ l,2 "2 % [ ] * P 8,;K 9 % g b"k 7 '%A B ) 4", ; * ;A ", "\Q & @,%G *. t k ( k ) ' ) /) * B* * %&
B* * %& %&, [2] Blatt H., Middleton G. V., Murray, R. G., "Origin of sedimentary rocks", (2nd edition), PrenticeHall Inc. New Jersey, (98) 782. [2] ang Q., Morse J.., "Pyrite formation under conditions approximating those in anoxic sediments I. Pathways and morphology", Marine hemistry 2 (996) 99 2. [22] Rickard D., "Kinetics of pyrite formation by the H2S oxidation of iron (II) monosulfide in aqueous solutions between 2 and 2º: the rate equation ", Geochimica et osmochimica Acta 6 (997), 34. [23]Howarth R.., "Pyrite: Its rapid formation in a salt marsh and its importance to ecosystem metabolism", Science 23 (979), 49. [24] Raiswell R., Berner R. A., "Pyrite formation in euxinic and semieuxinic sediments" American Journal of Science 28 (98) 7724. [2] Schmitt J. G., "Description and interpretation of silicified skeletal material from the Park ity Formation (Permian) of yoming", M.S. thesis, University of yoming, Laramie, (979) 84.,K 2 8,, sequences", In: A. Iijima and Hein, J. R. and Siever, R. eds. Siliceous deposits in the Pacific region, Elsevier Sci. Pub. o., Amsterdam, (983) 243. [4] Daley R. L., Boyd D.., "The role of skeletal microstructure during Selective Silicification of Brachiopods", Journal of Sedimentary Research 66, (996) 62. [] Adams A.E., Mackenzie.S., Guilford., 984, "Atlas of sedimentary rocks under the microscope", Longman (984) 4. [6] Berner R.A., "Sedimentary pyrite formation", American Journal of Science 268 (97) 23. [7] Lovley D.R., "Dissimilatory Fe (III) and Mn (IV) reduction", Microbiological Reviews (99) 29 287. [8] Sweeney R.E., Kaplan I.R., "Pyrite framboid formation: laboratory synthesis and marine sediments", Economic Geology 68 (973) 68 634. [9] Passier H. F., Middelburg J. J., de Lange G. J., Bottcher M.E., "Pyrite contents, microtextures, and sulfur isotopes in relation to formation of the youngest eastern Mediterranean sapropel", Geology 2 (997) 9 22.