Proceedings of the International Ocean Discovery Program最新文献_第4页

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Proceedings of the International Ocean Discovery Program Pub Date : 2019-01-01 DOI: 10.14379/iodp.proc.381.105.2019

L.C. McNeill, D.J. Shillington, Graham Carter, J.D. Everest, E. Le Ber, R.E. Collier, A. Cvetkoska, G. De Gelder, P. Diz, M. Doan, M. Ford, R. Gawthorpe, M. Geraga, J. Gillespie, R. Hemelsdaël, E. Herrero-Bervera, M. Ismaiel, L. Janikian, K. Kouli, S. Li, M.L. Machlus, M. Maffione, C. Mahoney, G. Michas, C. Miller, C.W. Nixon, S.A. Oflaz, A.P. Omale, K. Panagiotopoulos, S. Pechlivanidou, M.P. Phillips, S. Sauer, J. Seguin, S. Sergiou, N.V. Zakharova

引用次数: 3

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Proceedings of the International Ocean Discovery Program Pub Date : 2019-01-01 DOI: 10.14379/iodp.proc.381.104.2019

L.C. McNeill, D.J. Shillington, Graham Carter, J.D. Everest, E. Le Ber, R.E. Collier, A. Cvetkoska, G. De Gelder, P. Diz, M. Doan, M. Ford, R. Gawthorpe, M. Geraga, J. Gillespie, R. Hemelsdaël, E. Herrero-Bervera, M. Ismaiel, L. Janikian, K. Kouli, S. Li, M.L. Machlus, M. Maffione, C. Mahoney, G. Michas, C. Miller, C.W. Nixon, S.A. Oflaz, A.P. Omale, K. Panagiotopoulos, S. Pechlivanidou, M.P. Phillips, S. Sauer, J. Seguin, S. Sergiou, N.V. Zakharova

引用次数: 3

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Proceedings of the International Ocean Discovery Program Pub Date : 2019-01-01 DOI: 10.14379/iodp.proc.381.106.2019

L.C. McNeill, D.J. Shillington, Graham Carter, J.D. Everest, E. Le Ber, R.E. Collier, A. Cvetkoska, G. De Gelder, P. Diz, M. Doan, M. Ford, R. Gawthorpe, M. Geraga, J. Gillespie, R. Hemelsdaël, E. Herrero-Bervera, M. Ismaiel, L. Janikian, K. Kouli, S. Li, M.L. Machlus, M. Maffione, C. Mahoney, G. Michas, C. Miller, C.W. Nixon, S.A. Oflaz, A.P. Omale, K. Panagiotopoulos, S. Pechlivanidou, M.P. Phillips, S. Sauer, J. Seguin, S. Sergiou, N.V. Zakharova

引用次数: 1

Ross Sea West Antarctic Ice Sheet History 罗斯海西南极冰原历史

Proceedings of the International Ocean Discovery Program Pub Date : 2019-01-01 DOI: 10.14379/iodp.proc.374.2019

R. McKay, L. D. Santis, D. Kulhanek, I. Browne, A. Shevenell, Expedition Scientists

引用次数: 30

Data report: X-ray fluorescence studies of Site U1457 sediments, Laxmi Basin, Arabian Sea 资料报告:阿拉伯海Laxmi盆地U1457地点沉积物的x射线荧光研究

Proceedings of the International Ocean Discovery Program Pub Date : 2018-12-11 DOI: 10.14379/iodp.proc.355.203.2018

M. Lyle, D. Kulhanek, M. G. Bowen, Annette Hahn

{"title":"Data report: X-ray fluorescence studies of Site U1457 sediments, Laxmi Basin, Arabian Sea","authors":"M. Lyle, D. Kulhanek, M. G. Bowen, Annette Hahn","doi":"10.14379/iodp.proc.355.203.2018","DOIUrl":"https://doi.org/10.14379/iodp.proc.355.203.2018","url":null,"abstract":"Bulk sediment chemistry was measured at 2 cm resolution along cores from International Ocean Discovery Program (IODP) Site U1457 using the X-ray fluorescence (XRF) core scanner at the IODP Gulf Coast Repository. The Pleistocene splice section assembled from Holes U1457A and U1457B was scanned in its entirety, and nearly continuous sediment bulk chemistry profiles were constructed to a depth of 125 m core composite depth below seafloor (CCSF). Some sections of Hole U1457C were also scanned: (1) an upper Miocene hemipelagic section and (2) a 30 m lower Paleocene section directly overlying basalt. In the Pleistocene spliced sections, 2 cm spacing represents a sampling resolution of 150–300 y, whereas in the upper Miocene section this spacing represents about 500 y between samples. We report data and acquisition conditions for major and many minor elements. We find large variability in CaCO3 content in the Pleistocene section, from around 14 to 89 wt%. We used discrete shipboard CaCO3 measurements to calibrate the XRF Ca data. CaCO3 has cyclic variability and correlates with light sediment colors. Variation in aluminosilicate elements is largely caused by changes in dilution by CaCO3. The lower part of the spliced section, presumably representing distal Indus Fan deposits, has a distinctive but more uniform composition than the upper part. Introduction Variability in chemical composition of deep-sea sediments provides important data needed to understand changes in primary productivity, the carbon cycle, and sources of aluminosilicates. However, chemical analyses are typically too slow and expensive for high-resolution study of chemical composition covering long intervals of time. They also consume the sediments, so only limited numbers of analyses can be performed. Nondestructive X-ray fluorescence (XRF) core scanning provides the potential to produce high-resolution chemical profiles that can be calibrated with a small number of discrete chemical analyses. XRF is an X-ray optical technique that can measure most major and some minor elements. It is an economical way to extract bulk chemical data over longer sediment/rock profiles where thousands of analyses might be needed to resolve lithostratigraphic changes in the section. The method can be used to gather chemical data at a vertical resolution similar to that of physical property data collection by track systems on the JOIDES Resolution (e.g., Westerhold and Röhl, 2009; Lyle et al., 2012). These chemical measurements can augment physical property measurements to study cyclostratigraphy or rapid changes in sedimentation. If calibrated, the XRF data can be used to understand the long-term evolution of biogeochemical cycles and to identify the provenance of aluminosilicate sediments (Lyle and Baldauf, 2015). Data acquisition methods Data in this report were acquired at the IODP Gulf Coast Repository in College Station, Texas (http://iodp.tamu.edu/labs/xrf) using a third-generation Avaatech XRF core s","PeriodicalId":20641,"journal":{"name":"Proceedings of the International Ocean Discovery Program","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79850219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Data report: late Pliocene planktonic foraminifer assemblages from IODP Holes U1443B, U1443C, and U1445A 资料报告:来自IODP U1443B、U1443C和U1445A孔的晚上新世浮游有孔虫组合

Proceedings of the International Ocean Discovery Program Pub Date : 2018-11-08 DOI: 10.14379/iodp.proc.353.201.2018

M. Robinson, H. Dowsett

引用次数: 0

Data report: grain size analysis of Bengal Fan sediments at Sites U1450 and U1451, IODP Expedition 354 资料报告:IODP 354考察队U1450和U1451站点孟加拉扇沉积物粒度分析

Proceedings of the International Ocean Discovery Program Pub Date : 2018-10-17 DOI: 10.14379/IODP.PROC.354.202.2018

S. K. Adhikari, T. Sakai, Kohki Yoshida

引用次数: 4

Volume 367/368: South China Sea Rifted Margin 第367/368卷:南海裂谷边缘

Proceedings of the International Ocean Discovery Program Pub Date : 2018-09-28 DOI: 10.14379/iodp.proc.367368.2018

Zhen Sun, Z. Jian, J. Stock, H. Larsen, A. Klaus, C. Zarikian, A. Briais

引用次数: 43

Data report: IODP Expeditiom 366 pore water trace element (V, Mo, Rb, Cs, U, Ba, and Li) compositions 数据报告:IODP expedition 366孔隙水微量元素(V、Mo、Rb、Cs、U、Ba、Li)组成

Proceedings of the International Ocean Discovery Program Pub Date : 2018-08-13 DOI: 10.14379/IODP.PROC.366.201.2018

G. Wheat, T. Fournier, C. Paul, C. Menzies, R. Price, J. Ryan, Olivier Sissman

{"title":"Data report: IODP Expeditiom 366 pore water trace element (V, Mo, Rb, Cs, U, Ba, and Li) compositions","authors":"G. Wheat, T. Fournier, C. Paul, C. Menzies, R. Price, J. Ryan, Olivier Sissman","doi":"10.14379/IODP.PROC.366.201.2018","DOIUrl":"https://doi.org/10.14379/IODP.PROC.366.201.2018","url":null,"abstract":"International Ocean Discovery Program (IODP) Expedition 366 focused, in part, on the study of geochemical cycling, matrix alteration and transport, and deep biosphere processes in the Mariana subduction zone. This research was accomplished by sampling the summit and flank regions of three active serpentinite mud volcanoes in the Mariana forearc: Yinazao (Blue Moon), Fantangisña (Celestial), and Asùt Tesoro (Big Blue) Seamounts. These mud volcanoes represent a transect with increasing distance from the trench. Because these mud volcanoes discharge fluids and materials from the subduction channel, they provide a means to characterize thermal, geochemical, and pressure conditions within the seismogenic zone. Previous coring on Ocean Drilling Program (ODP) Legs 125 and 195 at two other serpentinite mud volcanoes (Conical and South Chamorro Seamounts, respectively) and piston, gravity, and push cores from several other Mariana serpentinite mud volcanoes add to this transect of deep-sourced material that is discharged at the seafloor. Pore waters were squeezed from cored serpentinite materials to determine the composition of deep-sourced fluid from the subduction channel and to assess the character, extent, and effect of diagenetic reactions and mixing with seawater on the flanks of three serpentinite seamounts (Yinazao, Fantangisña, and Asùt Tesoro). In addition, two water-sampling temperature probe (WSTP) fluid samples were collected in two of the cased boreholes, each with at least 30 m of screened casing that allowed formation fluids to discharge into the borehole. Here we report shore-based Li, Rb, Cs, Ba, V, Mo, and U measurements of pore waters and one of the WSTP samples. The alkali metals were analyzed to constrain the temperature of reaction in the subduction channel. The other elements were analyzed to assess potential biogenic and diagenetic reactions as the serpentinite material weathers and exchanges with bottom seawater via diffusion. Results were generally consistent with earlier coring and drilling operations, resulting in systematic changes in the composition of the deep-sourced fluid with distance from the trench. Introduction One goal of International Ocean Discovery Program (IODP) Expedition 366 was to elucidate geochemical cycling within the subduction channel of the Mariana forearc system (see the Expedition 366 summary chapter [Fryer et al., 2018b]). Expedition 366 successfully cored the flank and summit regions of three Mariana forearc serpentinite mud volcanoes that are located along a transect with increasing distance from the trench and by inference with depth to the subducted Pacific plate (Figure F1). Previous scientific drilling during Ocean Drilling Program (ODP) Legs 125 and 195 at two other Mariana serpentinite mud volcanoes, Conical and South Chamorro Seamounts, respectively, as well as piston, gravity, and push cores from several other Mariana serpentinite mud volcanoes add additional geochemical data to this transec","PeriodicalId":20641,"journal":{"name":"Proceedings of the International Ocean Discovery Program","volume":"49 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85109848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Data report: paleomagnetic directions from IODP Expedition 354, Hole U1451A, Cores 23H and 24H 数据报告:IODP 354考察队U1451A孔23H和24H核的古磁方向

Proceedings of the International Ocean Discovery Program Pub Date : 2018-08-07 DOI: 10.14379/IODP.PROC.354.201.2018

B. Reilly, J. Stoner, P. Selkin, J. Savian, L. Meynadier

引用次数: 4