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| Natura: | Dataset Open Access |
| Lingua: | en |
| Pubblicazione: |
PANGAEA
1986
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| Accesso online: | https://doi.org/10.1594/PANGAEA.763459 |
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| _version_ | 1867169982982389760 |
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| author | Yamamoto, Satoshi |
| author_facet | Yamamoto, Satoshi |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Concentrations of Fe, Mg, Ca, Sr, Mn, Zn, and other heavy metals were analyzed by atomic absorption spectrometry in 27 chert samples from the Pacific deep sea, 17 chert samples from land, and 4 associated sediments from the Pacific Ocean. Among the elements, Fe and Mg concentrations are highly correlatable as are the relationships between Ca and Sr, or between Ca and CO2. The correlation between Fe and Mg is particularly high for Pacific deep-sea flints and cherts, and for cherts of deep-sea origin from outcrops on land. Enrichments in heavy metals were recognized in some deep-sea cherts; volcanogenic cherts are enriched in Fe, a chert nodule containing basaltic fragments is enriched in Zn and Cr, and biogenically enclosed carbonates in flint nodules are enriched in Mn. The correlation of Fe and Mg and their constant ratio [Mg(%)/Fe(%)] of around 0.33 might be characteristic features in the pelagic clays contained in deep-sea flints and cherts, and the concentrations of heavy metals in them would be controlled by the concentrations of Fe-Mg correlated clays. Although the mineralogical nature of the Fe-Mg clay in deep-sea cherts was not clarified by dissolution experiments on opaline minerals in chert, the high concentrations of Fe-montmorillonite and fine-grained olivine or other ferromagnesian silicate minerals in the clay may result in the high correlations between Fe and Mg. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_763459 |
| institution | PANGAEA |
| language | en |
| publishDate | 1986 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Geochemical analyses of chert nodules and beds from deep-sea sediments (Table 1) Yamamoto, Satoshi 32-305; 62-463; 62-464; 62-465_Site; 62-466; 6-45A; 6-46; 6-47B; 6-52; Aomori-Prefecture; Calcium; Carbon dioxide; Cardiff_New-York; Chromium; Cobalt; Comment; Comment 2 (continued); COMPCORE; Composite Core; Copper; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Event label; Glomar Challenger; HAND; Hidaka; Iron; Japan; Lead; Leg32; Leg6; Leg62; Lithology/composition/facies; Magnesium; Manganese; Nickel; North Pacific/CONT RISE; North Pacific/PLAIN; North Pacific/PLATEAU; North Pacific/RIDGE; North Pacific/SEAMOUNT; Organic matter; Sample code/label; Sample comment; Sampling by hand; Stevns-Klint; Strontium; Titanium; Zinc Concentrations of Fe, Mg, Ca, Sr, Mn, Zn, and other heavy metals were analyzed by atomic absorption spectrometry in 27 chert samples from the Pacific deep sea, 17 chert samples from land, and 4 associated sediments from the Pacific Ocean. Among the elements, Fe and Mg concentrations are highly correlatable as are the relationships between Ca and Sr, or between Ca and CO2. The correlation between Fe and Mg is particularly high for Pacific deep-sea flints and cherts, and for cherts of deep-sea origin from outcrops on land. Enrichments in heavy metals were recognized in some deep-sea cherts; volcanogenic cherts are enriched in Fe, a chert nodule containing basaltic fragments is enriched in Zn and Cr, and biogenically enclosed carbonates in flint nodules are enriched in Mn. The correlation of Fe and Mg and their constant ratio [Mg(%)/Fe(%)] of around 0.33 might be characteristic features in the pelagic clays contained in deep-sea flints and cherts, and the concentrations of heavy metals in them would be controlled by the concentrations of Fe-Mg correlated clays. Although the mineralogical nature of the Fe-Mg clay in deep-sea cherts was not clarified by dissolution experiments on opaline minerals in chert, the high concentrations of Fe-montmorillonite and fine-grained olivine or other ferromagnesian silicate minerals in the clay may result in the high correlations between Fe and Mg. |
| title | Geochemical analyses of chert nodules and beds from deep-sea sediments (Table 1) |
| topic | 32-305; 62-463; 62-464; 62-465_Site; 62-466; 6-45A; 6-46; 6-47B; 6-52; Aomori-Prefecture; Calcium; Carbon dioxide; Cardiff_New-York; Chromium; Cobalt; Comment; Comment 2 (continued); COMPCORE; Composite Core; Copper; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Event label; Glomar Challenger; HAND; Hidaka; Iron; Japan; Lead; Leg32; Leg6; Leg62; Lithology/composition/facies; Magnesium; Manganese; Nickel; North Pacific/CONT RISE; North Pacific/PLAIN; North Pacific/PLATEAU; North Pacific/RIDGE; North Pacific/SEAMOUNT; Organic matter; Sample code/label; Sample comment; Sampling by hand; Stevns-Klint; Strontium; Titanium; Zinc |
| url | https://doi.org/10.1594/PANGAEA.763459 |