(Table 1) Trace elements, element ratios, isotopic ratios, verage isotope values and calcite precipitaion temperture from different Holes of Site 324

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Main Authors:	Li, Sanzhong, Geldmacher, Jörg, Hauff, Folkmar, Garbe-Schönberg, Dieter, Yu, Shan, Zhao, Shujuan, Rausch, Svenja
Format:	Dataset Open Access
Language:	en
Published:	PANGAEA 2015
Subjects:	324-U1347A; 324-U1349A; 324-U1350A; Barium; Calcification temperature; Cerium; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Dysprosium; Erbium; Europium; Event label; Exp324; Gadolinium; Holmium; ICP-MS, Agilent 7500c; ICP-OES, SPECTRO Ciros CCD; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Joides Resolution; Lanthanum; Lead; Lithium; Lutetium; Magnesium/Calcium ratio; Manganese; Neodymium; Neodymium-143/Neodymium-144 ratio; Praseodymium; Replicates; Rubidium; Samarium; Sample code/label; Sample comment; Scandium; Shatsky Rise; Strontium; Strontium/Calcium ratio; Strontium-87/Strontium-86 ratio; Terbium; Thulium; Uranium; Ytterbium; Yttrium; δ13C; δ18O
Online Access:	Acceder al recurso
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author	Li, Sanzhong Geldmacher, Jörg Hauff, Folkmar Garbe-Schönberg, Dieter Yu, Shan Zhao, Shujuan Rausch, Svenja
author_facet	Li, Sanzhong Geldmacher, Jörg Hauff, Folkmar Garbe-Schönberg, Dieter Yu, Shan Zhao, Shujuan Rausch, Svenja
collection	Datos científicos de ciencias marinas y ambientales
contents	Numerous calcium carbonate veins were recovered from the igneous basement of the Early Cretaceous Shatsky Rise during Integrated Ocean Drilling Program (IODP) Expedition 324. The chemical (Sr/Ca, Mg/Ca) and isotopic (87Sr/86Sr, 143Nd/144Nd, delta18O, delta13C) compositions of these veins were determined to constrain the timing of vein formation. A dominant control by seawater chemistry on calcite composition is evident for most vein samples with variable contributions from the basaltic basement. Slightly elevated precipitation temperatures (as inferred from oxygen isotope ratios), indicative of hydrothermal vein formation, are only observed at Site U1350 in the central part of Shatsky Rise. The highest 87Sr/86Sr ratios (least basement influence) of vein samples at each drill site range from 0.70726 to 0.70755 and are believed to reflect the contemporaneous seawater composition during the time of calcite precipitation. In principle, age information can be deduced by correlating these ratios with the global seawater Sr isotope evolution. Since the Sr isotopic composition of seawater has fluctuated three times between the early and mid Cretaceous, no unambiguous precipitation ages can be constrained by this method and vein precipitation could have occurred at any time between ~ 80 and 140 Ma. However, based on combined chemical and isotopic data and correlations of vein composition with formation depth and inferred temperature, we argue for a rather early precipitation of the veins shortly after basement formation at each respective drill site.
format	Dataset Open Access
id	pangaea_https___doi_org_10_1594_PANGAEA_855280
institution	PANGAEA
language	en
publishDate	2015
publisher	PANGAEA
record_format	pangaea
spellingShingle	(Table 1) Trace elements, element ratios, isotopic ratios, verage isotope values and calcite precipitaion temperture from different Holes of Site 324 Li, Sanzhong Geldmacher, Jörg Hauff, Folkmar Garbe-Schönberg, Dieter Yu, Shan Zhao, Shujuan Rausch, Svenja 324-U1347A; 324-U1349A; 324-U1350A; Barium; Calcification temperature; Cerium; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Dysprosium; Erbium; Europium; Event label; Exp324; Gadolinium; Holmium; ICP-MS, Agilent 7500c; ICP-OES, SPECTRO Ciros CCD; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Joides Resolution; Lanthanum; Lead; Lithium; Lutetium; Magnesium/Calcium ratio; Manganese; Neodymium; Neodymium-143/Neodymium-144 ratio; Praseodymium; Replicates; Rubidium; Samarium; Sample code/label; Sample comment; Scandium; Shatsky Rise; Strontium; Strontium/Calcium ratio; Strontium-87/Strontium-86 ratio; Terbium; Thulium; Uranium; Ytterbium; Yttrium; δ13C; δ18O Numerous calcium carbonate veins were recovered from the igneous basement of the Early Cretaceous Shatsky Rise during Integrated Ocean Drilling Program (IODP) Expedition 324. The chemical (Sr/Ca, Mg/Ca) and isotopic (87Sr/86Sr, 143Nd/144Nd, delta18O, delta13C) compositions of these veins were determined to constrain the timing of vein formation. A dominant control by seawater chemistry on calcite composition is evident for most vein samples with variable contributions from the basaltic basement. Slightly elevated precipitation temperatures (as inferred from oxygen isotope ratios), indicative of hydrothermal vein formation, are only observed at Site U1350 in the central part of Shatsky Rise. The highest 87Sr/86Sr ratios (least basement influence) of vein samples at each drill site range from 0.70726 to 0.70755 and are believed to reflect the contemporaneous seawater composition during the time of calcite precipitation. In principle, age information can be deduced by correlating these ratios with the global seawater Sr isotope evolution. Since the Sr isotopic composition of seawater has fluctuated three times between the early and mid Cretaceous, no unambiguous precipitation ages can be constrained by this method and vein precipitation could have occurred at any time between ~ 80 and 140 Ma. However, based on combined chemical and isotopic data and correlations of vein composition with formation depth and inferred temperature, we argue for a rather early precipitation of the veins shortly after basement formation at each respective drill site.
title	(Table 1) Trace elements, element ratios, isotopic ratios, verage isotope values and calcite precipitaion temperture from different Holes of Site 324
topic	324-U1347A; 324-U1349A; 324-U1350A; Barium; Calcification temperature; Cerium; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Dysprosium; Erbium; Europium; Event label; Exp324; Gadolinium; Holmium; ICP-MS, Agilent 7500c; ICP-OES, SPECTRO Ciros CCD; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Joides Resolution; Lanthanum; Lead; Lithium; Lutetium; Magnesium/Calcium ratio; Manganese; Neodymium; Neodymium-143/Neodymium-144 ratio; Praseodymium; Replicates; Rubidium; Samarium; Sample code/label; Sample comment; Scandium; Shatsky Rise; Strontium; Strontium/Calcium ratio; Strontium-87/Strontium-86 ratio; Terbium; Thulium; Uranium; Ytterbium; Yttrium; δ13C; δ18O
url	https://doi.org/10.1594/PANGAEA.855280

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