- Email: [email protected]
Contents Vol. 9 (1979)
359
Contents Vol. 9 (1979) Research Papers The eukaryotic nature of Eosphaera-like ferriferous structures from the Precambrian Gunflint Iron Formation, Canada: a comparative study J. Ka~mierczak (Warsaw, Poland) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Frutexites from stromatolites of the Gunflint Iron Formation of Canada, and its biological affinities M.R. Walter (Canberra, Australia) and S.M. Awramik (Santa Barbara, CA, U.S.A.) . . . . . . . . Sampling methods and geochemical composition of Archean rocks in southeastern Manitoba, Canada E.M. Cameron, I.E. Ermanovics and T.I. Goss (Ottawa, Canada) . . . . . . . . . . . . . . . . . . The chemical composition, Rb-Sr isotopic systematics and tectonic setting of certain post-kinematic mafic igneous rocks, Limpopo Mobile Belt, Southern Africa J.M. Barton, Jr. (Johannesburg, South Africa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . On microbial contaminants, micropseudofossils, and the oldest records of life P. Cloud and K. Morrison (Santa Barbara, CA, U.S.A.) . . . . . . . . . . . . . . . . . . . . . . . . Primary productivitv in an early Archean microbial ecosvstem T.O. Reimer (Wiesbaden, F.R.G.), E.S. Barghoorn (Cambridge, MA, U.S.A.) and L. Margulis (Boston, MA, U.S.A.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
23
35
57 81
93
Stromatolite Bibliography 2 S.M. Awramik, A. Haupt, H.J. Hofmann and M.R. Walter (Compilers) . . . . . . . . . . . . . . .
Announcement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
105 167
Research Papers A fluvial fan depositional model for Middle Proterozoic red beds from the Waterberg Group, South Africa K.A. Eriksson (Richardson, TX, U.S.A.) and R.G. Vos (Perth, Australia) . . . . . . . . . . . . . Rb-Sr ages of intrusive plutonic rocks from the Stora Le--Marstrand belt in Orust, SW Sweden J.S. Daly, R.G. Park (Keele, England) and R.A. Cliff (Leeds, England) . . . . . . . . . . . . . . Archaean structural evolution in the northwest of the Buksefjorden region, southern West Greenland B, Chadwick and A.P. Nutman (Exeter, England) . . . . . . . . . . . . . . . . . . . . . . . . . . . Isotopic age determinations on granitic and gneissic rocks from the UbendianUsagaran system in southern Tanzania H.N.A. Priem, N.A.I.M. Boelrijk, E.H. Hebeda, E.A.Th. Verdurmen, R.H. Verschure, I.S. Oen and L. Westra (Amsterdam, The Netherlands) . . . . . . . . . . . . . . Geochronological data on the Amsinassene-Tedefest Block (Central Hoggar, Algerian Sahara) and evidence for its polycyclic evolution Y. Vialette (Clermont-Fd, France) and G. Vitel (St. Etienne, France) . . . . . . . . . . . . . . . Geochronological investigation on the Precambrian granulitic terrain of Bahia, Brazil U.G. Cordani and S.S. lyer (Sao Paulo, Brazil) . . . . . . . . . . . . . . . . . . . . . . . . . . . . Consanguineous Archaean intrusive and extrusive rocks, Noranda, Quebec: chemical similarities and differences R. Goldie (Kingston, Canada) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Metasedimentary cordierite-gedrite rocks of Archean age near Yellowknife, Canada D,C. Mamineni (Ottawa, Canada) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Charnokite genesis and the Proterozoic crust J. Martignole (Montreal, Canada) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
169
189
199
227
241 255
275 289 303
360 An evolutional model of the terrestrial atmosphere from a comparative planetological view M. Shimizu (Tokyo, Japan) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reassessment of part of the Barberton type area, South Africa D.A.C. Williams (Perth, Australia) and R.G. Furnell (Grahamstown, South Africa) . . . . . . .
311 325
Discussion
Reassessment of part of the Barberton type area, Sout Africa - a comment M.J. Viljoen and R.P. Viljoen (Johannesburg, South Africa) - a reply . . . . . . . . . . . . . . D.A.C. Williams (Perth, Australia) and R.G. Furnell (Grahamstown, South Africa) . . . . . . .
349 353
C o n t e n t s voL 9 ( 1 9 7 9 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
359
Contents Vol. 9 (1979) Research Papers The eukaryotic nature of Eosphaera-like ferriferous structures from the Precambrian Gunflint Iron Formation, Canada: a comparative study J. Ka~mierczak (Warsaw, Poland) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Frutexites from stromatolites of the Gunflint Iron Formation of Canada, and its biological affinities M.R. Walter (Canberra, Australia) and S.M. Awramik (Santa Barbara, CA, U.S.A.) . . . . . . . . Sampling methods and geochemical composition of Archean rocks in southeastern Manitoba, Canada E.M. Cameron, I.E. Ermanovics and T.I. Goss (Ottawa, Canada) . . . . . . . . . . . . . . . . . . The chemical composition, Rb-Sr isotopic systematics and tectonic setting of certain post-kinematic mafic igneous rocks, Limpopo Mobile Belt, Southern Africa J.M. Barton, Jr. (Johannesburg, South Africa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . On microbial contaminants, micropseudofossils, and the oldest records of life P. Cloud and K. Morrison (Santa Barbara, CA, U.S.A.) . . . . . . . . . . . . . . . . . . . . . . . . Primary productivitv in an early Archean microbial ecosvstem T.O. Reimer (Wiesbaden, F.R.G.), E.S. Barghoorn (Cambridge, MA, U.S.A.) and L. Margulis (Boston, MA, U.S.A.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
23
35
57 81
93
Stromatolite Bibliography 2 S.M. Awramik, A. Haupt, H.J. Hofmann and M.R. Walter (Compilers) . . . . . . . . . . . . . . .
Announcement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
105 167
Research Papers A fluvial fan depositional model for Middle Proterozoic red beds from the Waterberg Group, South Africa K.A. Eriksson (Richardson, TX, U.S.A.) and R.G. Vos (Perth, Australia) . . . . . . . . . . . . . Rb-Sr ages of intrusive plutonic rocks from the Stora Le--Marstrand belt in Orust, SW Sweden J.S. Daly, R.G. Park (Keele, England) and R.A. Cliff (Leeds, England) . . . . . . . . . . . . . . Archaean structural evolution in the northwest of the Buksefjorden region, southern West Greenland B, Chadwick and A.P. Nutman (Exeter, England) . . . . . . . . . . . . . . . . . . . . . . . . . . . Isotopic age determinations on granitic and gneissic rocks from the UbendianUsagaran system in southern Tanzania H.N.A. Priem, N.A.I.M. Boelrijk, E.H. Hebeda, E.A.Th. Verdurmen, R.H. Verschure, I.S. Oen and L. Westra (Amsterdam, The Netherlands) . . . . . . . . . . . . . . Geochronological data on the Amsinassene-Tedefest Block (Central Hoggar, Algerian Sahara) and evidence for its polycyclic evolution Y. Vialette (Clermont-Fd, France) and G. Vitel (St. Etienne, France) . . . . . . . . . . . . . . . Geochronological investigation on the Precambrian granulitic terrain of Bahia, Brazil U.G. Cordani and S.S. lyer (Sao Paulo, Brazil) . . . . . . . . . . . . . . . . . . . . . . . . . . . . Consanguineous Archaean intrusive and extrusive rocks, Noranda, Quebec: chemical similarities and differences R. Goldie (Kingston, Canada) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Metasedimentary cordierite-gedrite rocks of Archean age near Yellowknife, Canada D,C. Mamineni (Ottawa, Canada) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Charnokite genesis and the Proterozoic crust J. Martignole (Montreal, Canada) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
169
189
199
227
241 255
275 289 303
360 An evolutional model of the terrestrial atmosphere from a comparative planetological view M. Shimizu (Tokyo, Japan) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reassessment of part of the Barberton type area, South Africa D.A.C. Williams (Perth, Australia) and R.G. Furnell (Grahamstown, South Africa) . . . . . . .
311 325
Discussion
Reassessment of part of the Barberton type area, Sout Africa - a comment M.J. Viljoen and R.P. Viljoen (Johannesburg, South Africa) - a reply . . . . . . . . . . . . . . D.A.C. Williams (Perth, Australia) and R.G. Furnell (Grahamstown, South Africa) . . . . . . .
349 353
C o n t e n t s voL 9 ( 1 9 7 9 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
359