Data

 

264 datasets found! (Query time: 3 ms)

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101. Ogawa, Y; Takahashi, K; Yamanaka, T et al. (2009): (Appendix A) Geochemistry for Units 1/6, 2, and the upper part of Unit 3 of IODP Holes 302-M0002A and 302-M0004A

     Abstract:

     Integrated Ocean Drilling Program (IODP) Expedition 302 Arctic Coring Expedition (ACEX) obtained the first relatively continuous long sediment cores from the Lomonosov Ridge in the central Arctic Ocean in 2004. Preceding microfossil studies indicated the dominance of low salinity surface waters in the early to middle Eocene Arctic basin. The main purpose of this study is to reconstruct paleoceanographic conditions including the extent of saline (seawater) mass presence. To attain this goal we performed geochemical analyses of total sulfur (%TS), total organic carbon (%TOC) and stable sulfur isotopic composition (d34S) on the early to middle Eocene section of the ACEX cores. The %TS were high in all the examined intervals and the sedimentary sulfur occurred mainly as framboidal pyrite, indicating that sufficient sulfate, indicative of seawater, was present in the deep layer of the paleo-Arctic basin and that the pyrite was formed in the sediments under sufficient iron input. […]

     Size:

     909 data points

     https://doi.org/10.1594/PANGAEA.785796 - Score: 7.7
102. Expedition 302 Scientists (2006): Core summary for Hole 302-M0004C

     Size:

     53 data points

     https://doi.org/10.1594/PANGAEA.549057 - Score: 7.7
103. Expedition 302 Scientists (2006): Core-section summary for Hole 302-M0003A

     Size:

     97 data points

     https://doi.org/10.1594/PANGAEA.319249 - Score: 7.7
104. Weijers, JWH; Schouten, S; Sluijs, A et al. (2007): Reconstruction of continental mean air temperature across the PETM of IODP Hole 302-M0004A (Appendix A)

     Abstract:

     The Palaeocene-Eocene Thermal Maximum (PETM; ~55.5 Ma) is a geologically relatively brief episode of extreme warmth. Both deep and surface ocean temperatures increased by up to 5 °C in equatorial waters and up to 8 °C in mid and high latitude waters. From the continents, the annual mean air temperature response during the PETM is still largely unknown, mainly due to a lack of quantitative temperature proxies and sufficient suitable, continuous high resolution records. Recently, a new proxy for continental temperature reconstructions has been proposed, based on the distribution of membrane lipids of bacteria in present-day soils [Weijers et al., 2007, doi:10.1016/j.gca.2006.10.003] and shown to reconstruct annual mean air temperature. […]

     Size:

     219 data points

     https://doi.org/10.1594/PANGAEA.707279 - Score: 7.7
105. Expedition 302 Scientists (2006): Isolated pebbles of Hole 302-M0002A

     Size:

     90 data points

     https://doi.org/10.1594/PANGAEA.326650 - Score: 7.7
106. Expedition 302 Scientists (2006): Physical properties of Hole 302-M0003A

     Size:

     5812 data points

     https://doi.org/10.1594/PANGAEA.672414 - Score: 7.7
107. Expedition 302 Scientists (2006): Results of foraminifer and ostracode analyses of Hole 302-M0004A

     Size:

     218 data points

     https://doi.org/10.1594/PANGAEA.356557 - Score: 7.7
108. Sluijs, A; Röhl, U; Schouten, S et al. (2008): (Table 1) Elemental mean values of the upper Paleocene and lower Eocene in IODP Hole 302-M0004A

     Abstract:

     We reconstruct the latest Paleocene and early Eocene (~57-50 Ma) environmental trends in the Arctic Ocean and focus on the Paleocene-Eocene thermal maximum (PETM) (~55 Ma), using strata recovered from the Lomonosov Ridge by the Integrated Ocean Drilling Program Expedition 302. The Lomonosov Ridge was still partially subaerial during the latest Paleocene and earliest Eocene and gradually subsided during the early Eocene. Organic dinoflagellate cyst (dinocyst) assemblages point to brackish and productive surface waters throughout the latest Paleocene and early Eocene. Dinocyst assemblages are cosmopolitan during this time interval, suggesting warm conditions, which is corroborated by TEX86'-reconstructed temperatures of 15°-18°C. Inorganic geochemistry generally reflects reducing conditions within the sediment and euxinic conditions during the upper lower Eocene. […]

     Size:

     125 data points

     https://doi.org/10.1594/PANGAEA.733796 - Score: 7.595
109. Expedition 302 Scientists (2006): In situ temperature measurements from Hole 302-M0004C

     Size:

     21 data points

     https://doi.org/10.1594/PANGAEA.418108 - Score: 7.595
110. Expedition 302 Scientists (2006): Isolated pebbles of Hole 302-M0003A

     Size:

     10 data points

     https://doi.org/10.1594/PANGAEA.326688 - Score: 7.595

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