Desarrollo emocional (6-8 años)

During the year 2008 different activities of our team were connected with investigation of stratigraphy of the Devonian sequences from West Siberia and western part of the South Tien Shan. Research group includes: Drs. E.A. Yolkin, N.K. Bakharev, N.G. Izokh, O.T. Obut, V.G. Khromykh, N.V. Sennikov, T.P. Kipriyanova, PhD students O.P. Izokh and T.A. Shcherbanenko.

In cooperation with the Uzbekistan team (under the leadership of Drs. A.I. Kim and M.V. Erina) data on geology and biostratigraphy of the Devonian sequences exposed on the territory of the Kitab State Geological Reserve (Republic Uzbekistan), western part of the Zeravshan Range in the South Tien Shan, were revised. Most complete carbonate sections of the Lower Devonian and lowermost Middle Devonian are well-exposed and characterized by extremely abundant and diverse benthic and pelagic fauna (stromatoporoids, tabulate and rugose corals, ammonoids, trilobites, brachiopods, ostracods, crinoids, bryozoans, conodonts, tentaculites, chitinozoans, graptolites, microremains of vertebrates). These sections are unique because of presence of such groups as graptolites, those last representatives were found in conodont

nothoperbonus Zone (lower part of upper

Emsian) and by findings of early ammonoids in the inversus Zone. The most important for the Devonian biochronology lineages of conodont genera Ozarkodina, Eognathodus and Polygnathus are designated for the entire Lower Devonian succession. This allowed establishing of the GSSP for the lower boundary of the Emsian Stage (Yolkin et al., 1997). There are good perspectives for establishment of the lower boundary of the upper Emsian. Summarized data have been

published in the guidebook “Devonian sequences of the Kitab Reserve Area” (see references below). International Conference “Global alignment of Lower Devonian carbonate and clastic sequences” (SDS/IGCP499 project joint field meeting) was organized in the Kitab State Geological Reserve, Uzbekistan on August 25 – September 3, 2008. During the conference the Annual Business Meeting of the International Subcommission on Devonian Stratigraphy was held.

CM E.A. Yolkin, TM N.G. Izokh in cooperation with TM K. Weddige and CM M.V. Erina (Yolkin et al., 2008) have summarized data on evolution and phylogeny of the early polygnathids (conodonts). Three specific polygnathid lineages for Pragian and Emsian stages were proposed: (a) Po. kitabicus – Po. excavatus – Po. nothoperbonus, (b) Po.

pannonicus – Po. “postpannonicus” – Po. “postpostpannonicus” and (c) Po. sokolovi – Po. hindei – Po. tamarae as well as

demonstrated polymorphic structure of the architype (the species Po. pireneae).

TM N.G. Izokh and CM O.T. Obut: We continue examination of Middle-Upper Devonian siliceous-terrigenous rocks on a presence of conodonts and radiolarians. Frasnian conodont and radiolarian biofacies have been distinguished in the Rudny Altai. Comparative studies of conodonts and radiolarians occurred together in the Frasnian- Famennian strata of the Rudny Altai, South Urals (Russia) and Nevada (USA) have been started (Izokh et al., 2008 a, b; Obut, 2008).

CM N.K. Bakharev investigated the Emsian ostracods from Salair (South of West Siberia,

Russia) and Zeravshan Ridge (Republic Uzbekistan). Comparative studies revealed that different facial associations are most diverse in the late Emsian (Shandian Horizon and Gorlisayian Subhorizon). Considerable similarity was revealed within associations, characteristic for the slope facies (bedded or platy carbonates).

V.G. Khromykh made biostratigraphic analysis of the Emsian stromatoporoids. On Salair (South of West Siberia, Russia) they were distributed in the shallow shelf and stromatoporoids studied from the Zeravshan Ridge (Republic Uzbekistan) inhabited upper part of the shallow shelf and are represented by more diverse associations.

PhD student O.P. Izokh continues investigations of the carbon (organic and inorganic) and oxygen isotope composition from the F/F carbonates from the Kuznetsk Basin (Kolyvan’-Tomsk fold-thrusted area) and of South Urals, as a part of compiling of the data basis (O. Izokh, 2008a, b). First data on δ13C- и δ18О obtained from F/F carbonates collected from sections Akkyr and Bolshaya Barma on western slope South Urals showed positive excursions characteristic for F/F carbonates reported from other regions. However amplitude of the positive shift and δ13C maximum values differ from that reported previously. For the section Akkyr maximum values exceed 6,7‰ and shift amplitude is 5,5‰. In the section Bolshaya Barma only lowermost Famennian part was sampled and thus only beginning of δ13C positive excursion was fixed.

PhD student T.A. Shcherbanenko together with R.T. Gratsianova and CM J. Talent revised of Early Emsian Chonetoidean brachiopods from the Zeravshan Ridge of the

South Tien Shan (Republic Uzbekistan) and Salair (South of West Siberia) (Gratsianova et al., 2008). Within 5 chonetoidean species presently known from the two regions, Salair and the South Tien Shan, only three are common to the two regions, which is quite high level of similarity.

Field works in Kemerovo and SE Altai regions have been carried out in August 2008. The Lower to Upper Devonian sections have been examined. Sampling on microfauna (conodonts, ostracods), ammonoids, brachiopods, corals and for isotopic studies (δ13C and δ18O) was made. Participants: CM N.K. Bakharev, TM N.G. Izokh, PhD students O.P. Izokh and T.A. Shcherbanenko.

We would like to make first announcement of the International Conference and SDS field

meeting to be held in the Kuznetsk Basin region (South of West Siberia, Russia) in 2011. This proposal was approved during the

Annual meeting of the Subcommission on Devonian Stratigraphy in the Kitab State Reserve, Uzbekistan (September, 2008). Preliminary terms 12-14 days between 20 July – 10 August, 2011. One-two days indoor session is planned in the Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of RAS (Novosibirsk).

Middle and Upper Devonian as well as Lower Carboniferous mainly carbonate sections will be introduced. They are characterized by diverse benthic and pelagic fauna (brachiopods, corals, ammonoids, trilobites, conodonts, ostracods). More details and circular would be distributed in 2010. Organizing Committee warmly welcomes Devonian workers to participate in the meeting.

References

Devonian sequences of the Kitab Reserve area. Field Excursion Guidebook. International Conference “Global Alignments of Lower Devonian Carbonate and Clastic Sequences” (SDS/IGCP 499 project joint field meeting). August 25 – September 3, 2008, Kitab State Geological Reserve, Uzbekistan / Eds E.A. Yolkin, A.I. Kim, J.A. Talent. – Novosibirsk: Publishing House of SB RAS. 2008. 100 p. Authors: A.I. Kim, E.A. Yolkin, M.V. Erina, I.A. Kim, N.A. Meshchankina, F.A. Salimova, F.S. Karimova, U.D. Rakhmonov, E.S. Tsmeyrek, N.K. Bakharev, N.G. Izokh, T.P. Kipriyanova, O.T. Obut, N.V. Sennikov.

Bakharev N.K. Devonian ostracods from Salair and Kuznetsk Basin // News of Paleontology and Startigraphy: vol. 10-11. Supplement to journal “Geologiya i geophysica”, vol. 49, 2008. Novosibirsk: SB RAS Publ. House, 2008. P. 85-87. [in Russian]

Bakharev N.K. Comparison of Emsian ostracods from Salair and Zeravshan Ridge // “Global Alignment of Lower Devonian Carbonate and Clastic Sequences” (IGCP 499 project / SDS joint field meeting): Contributions of the International Conference. August 25 – September 3, 2008. Kitab State Geological reserve, Uzbekistan / Eds. A.I. Kim, F.A. Salomova, N.A. Meshchankina; SealMag Press, 2008. P. 13-14. [in Russian]

Gratsianova R.T., Shcherbanenko T.A., Talent J.A. Early Emsian chonetoidean brachiopods from the Zeravshan- Hissar mountain area (Uzbekistan) and the Salair (Southern West Siberia, Russia) // “Global Alignment of Lower Devonian Carbonate and Clastic Sequences” (IGCP 499 project / SDS joint field meeting): Contributions of the International Conference. August 25 – September 3, 2008. Kitab State Geological reserve, Uzbekistan / Eds. A.I. Kim, F.A. Salomova, N.A. Meshchankina; SealMag Press, 2008. P. 35-36. Izokh N.G., Obut O.T., Sennikov N.V., Yolkin E.A. Late Frasnian conodonts and radiolarians from the Rudny

Altai (south of West Siberia) // Geobiosphere events and history of the organic world. Abstracts of the LIV session of the Paleontological society of RAS (Apil 7-11 2008, Sankt-Petersburg). Sankt-Petersburg. 2008a. P. 77-78. [In Russian]

Izokh N.G., Obut O.T., Morrow J. and Sandberg Ch.A. New findings of Upper Frasnian conodonts and radiolarians from the WMO section (Nevada, U.S.A) //Final Meeting of IGCP 497 and IGCP 499. Abstracts and Programme. Editors: Peter Konigshof & Ulf Linnemann. Frankfurt am Main, September 30- October 3, 2008 b. P. 186-188.

Izokh N.G., Yolkin E.A., Bukolova E.V. Frasnian biofacies and taxonomic diversity of conodonts from the Rudny Altai (South of West Siberia) // News of Paleontology and Startigraphy: vol. 10-11. Supplement to journal “Geologiya i geophysica”, vol. 49, 2008. Novosibirsk: SB RAS Publ. House, 2008c. P. 122-124. [In Russian]

Izokh O.P. Pecularities of δ13Ccarb, δ13Corg and δ18O in the Upper Devonian sections from the Kuznetsk Basin // “Global Alignment of Lower Devonian Carbonate and Clastic Sequences” (IGCP 499 project / SDS joint field meeting): Contributions of the International Conference. August 25 – September 3, 2008. Kitab State Geological reserve, Uzbekistan / Eds. A.I. Kim, F.A. Salomova, N.A. Meshchankina; SealMag Press, 2008. P. 40-42.

Izokh O.P. Isotopic composition of carbon and oxygen in the Upper Devonian carbonate sections from the Kuznetsk Basin and Western part of South Urals. Abstracts of the IV Siberian International Conference of young scientists on Earth Sciences. Novosibirsk: IGM SB RAS, 2008. P. 130-131.

Khromykh V.G. Similarity and difference in Emsian stromatoporoids from Salair and Zeravshan Ridge //“Global Alignment of Lower Devonian Carbonate and Clastic Sequences” (IGCP 499 project / SDS joint field meeting): Contributions of the International Conference. August 25 – September 3, 2008. Kitab State Geological reserve, Uzbekistan / Eds. A.I. Kim, F.A. Salomova, N.A. Meshchankina; SealMag Press, 2008. P. 59. [In Russian]

Obut O.T. Analysis of biodiversity of Upper Devonian radiolarians in siliciclastic and terrigenous-carbonate facies from Rudny Altai, south of West Siberia // “Global Alignment of Lower Devonian Carbonate and Clastic Sequences” (IGCP 499 project / SDS joint field meeting): Contributions of the International Conference. August 25 – September 3, 2008. Kitab State Geological reserve, Uzbekistan / Eds. A.I. Kim, F.A. Salomova, N.A. Meshchankina; SealMag Press, 2008. P. 91-92.

Sennikov N.V. The distribution of Early Devonian graptolites in the Zinzilban section (Kitabian Regiostage, Zinzilbanian and Norbonakian regiosubstages) // “Global Alignment of Lower Devonian Carbonate and Clastic Sequences” (IGCP 499 project / SDS joint field meeting): Contributions of the International Conference. August 25 – September 3, 2008. Kitab State Geological reserve, Uzbekistan / Eds. A.I. Kim, F.A. Salomova, N.A. Meshchankina; SealMag Press, 2008. P. 107-109.

Shcherbanenko T.A. Peculiarities in the stratigraphic distribution of strophomenids (Brachiopoda) in the Emsian sediments of different facies from NE Salair (South of West Siberia) // Modern paleontology: classic and new methods. V All-Russian school for young paleontologists. October 6-8, 2008. Borissiak Paleontological Institute RAS, Moscow. Abstracts. Moscow, 2008. P. 58-59. [in Russian]

Talent J.A., Yolkina V.N., Kipriyanova T.P., Yolkin E.A. and Gratsianova R.T. Implications of changes/transformations in the pattern of brachiopod biogeography in northern Asia through latest Silurian (Pridoli), Early and Middle Devonian times // Final Meeting of IGCP 497 and IGCP 499. Abstracts and Programme. Editors: Peter Konigshof & Ulf Linnemann. Frankfurt am Main, September 30-October 3, 2008. P. 134-136.

Yolkin E.A., Sennikov N.V., Bakharev N.K., Belyaev S.Yu., Izokh N.G., Kanygin A.V., Klets A.G., Kontorovich A.E., Kontorovich V.A., Obut O.T., Saraev S.V., Filippov Yu.F. Main features of modern structure and history of formation of the Precambrian-Paleozoic West Siberian sedimentary basin // Contributions of the All-Russian scientific conference “Base, adjacent structures of the West-Siberian Mesozoic-Cenozoic sedimentary basin, their geodynamic evolution and problems of oil-and-gas content”. September, 29 – October, 2, 2008, Tyumen’-Novosibirsk. P. 75-80. [in Russian]

Yolkin E.A., Weddige K., Izokh N.G., Erina M.V. Pragian-Early Emsian polygnathids from Kitab Reserve sequences: their origin, main evolutionary stock and specific lineages // “Global Alignment of Lower Devonian Carbonate and Clastic Sequences” (IGCP 499 project / SDS joint field meeting): Contributions of the International Conference. August 25 – September 3, 2008. Kitab State Geological reserve, Uzbekistan / Eds. A.I. Kim, F.A. Salomova, N.A. Meshchankina; SealMag Press, 2008. P. 115-117.