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| Main Authors: | , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
1994
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| Online Access: | https://doi.org/10.1594/PANGAEA.800253 |
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| _version_ | 1867169072479731712 |
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| author | Schöps, Dietmar Herzig, Peter M |
| author_facet | Schöps, Dietmar Herzig, Peter M |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Hole 841B was drilled in the forearc region of the Lau Basin at a water depth of 4810 m. The hole penetrated a roughly 500-m-thick series of Miocene volcanic sediments with a number of basaltic to andesitic units (sills?) varying in thickness between 7 cm and 17 m. The volcanics are slightly to moderately altered and contain analcite, chabazite, natrolite-thompsonite, heulandite (?), prehnite, and quartz as secondary phases. In addition, thaumasite [Ca3Si(OH)6 * 12H2O](SO4)(CO3) was identified in the altered sequence. Sulfur isotope data of two thaumasite separates (+23.5 per mil and +21.1 per mil d34S) indicate a seawater origin of the sulfate sulfur. It is suggested that thaumasite is a product of low-temperature (<60 °C), seawater-derived CaCl2-rich fluids that were almost identical in composition to those presently circulating in the sub-seafloor. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_800253 |
| institution | PANGAEA |
| language | en |
| publishDate | 1994 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 1) Determined and theoretical chemical composition of thaumasite of ODP Hole 135-841B Schöps, Dietmar Herzig, Peter M 135-841B; Aluminium; Aluminium oxide; Antimony; Arsenic; Barium; Bromine; Caesium; Calcium; Calcium oxide; Calculated; Calculated based on oxygen number; Carbon; Carbon dioxide; Cerium; Chromium; Cobalt; Copper; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Elements, total; Europium; Gallium; Gold; Hafnium; Hydroxide; Iridium; Iron 2+ and 3+; Iron oxide, Fe2O3; Joides Resolution; Lanthanum; Leg135; Lutetium; Magnesium; Magnesium oxide; Manganese oxide; Molybdenum; Neodymium; Nickel; Niobium; Ocean Drilling Program; ODP; Phosphorus pentoxide; Potassium oxide; Rubidium; Samarium; Scandium; Selenium; Silicon; Silicon dioxide; Silver; Sodium; Sodium oxide; South Pacific Ocean; Strontium; Sulfite; Sulfur; Tantalum; Terbium; Thorium; Titanium dioxide; Tungsten; Uranium; Water; Water in rock; X-ray fluorescence (XRF); Ytterbium; Yttrium; Zinc; Zirconium Hole 841B was drilled in the forearc region of the Lau Basin at a water depth of 4810 m. The hole penetrated a roughly 500-m-thick series of Miocene volcanic sediments with a number of basaltic to andesitic units (sills?) varying in thickness between 7 cm and 17 m. The volcanics are slightly to moderately altered and contain analcite, chabazite, natrolite-thompsonite, heulandite (?), prehnite, and quartz as secondary phases. In addition, thaumasite [Ca3Si(OH)6 * 12H2O](SO4)(CO3) was identified in the altered sequence. Sulfur isotope data of two thaumasite separates (+23.5 per mil and +21.1 per mil d34S) indicate a seawater origin of the sulfate sulfur. It is suggested that thaumasite is a product of low-temperature (<60 °C), seawater-derived CaCl2-rich fluids that were almost identical in composition to those presently circulating in the sub-seafloor. |
| title | (Table 1) Determined and theoretical chemical composition of thaumasite of ODP Hole 135-841B |
| topic | 135-841B; Aluminium; Aluminium oxide; Antimony; Arsenic; Barium; Bromine; Caesium; Calcium; Calcium oxide; Calculated; Calculated based on oxygen number; Carbon; Carbon dioxide; Cerium; Chromium; Cobalt; Copper; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Elements, total; Europium; Gallium; Gold; Hafnium; Hydroxide; Iridium; Iron 2+ and 3+; Iron oxide, Fe2O3; Joides Resolution; Lanthanum; Leg135; Lutetium; Magnesium; Magnesium oxide; Manganese oxide; Molybdenum; Neodymium; Nickel; Niobium; Ocean Drilling Program; ODP; Phosphorus pentoxide; Potassium oxide; Rubidium; Samarium; Scandium; Selenium; Silicon; Silicon dioxide; Silver; Sodium; Sodium oxide; South Pacific Ocean; Strontium; Sulfite; Sulfur; Tantalum; Terbium; Thorium; Titanium dioxide; Tungsten; Uranium; Water; Water in rock; X-ray fluorescence (XRF); Ytterbium; Yttrium; Zinc; Zirconium |
| url | https://doi.org/10.1594/PANGAEA.800253 |