Chemical composition of zeolites in sandstones at DSDP Sites 445 and 446
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
1988
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| _version_ | 1867167660160057344 |
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| author | Lee, Yong Il |
| author_facet | Lee, Yong Il |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Andesitic volcaniclastic sandstones of Middle Eocene age recovered from DSDP Sites 445 and 446, a back-arc basin, contain clinoptilolite, heulandite and analcite as a pore-filling cement. Clinoptilolite and heulandite at Sites 445 and 446 contain different chemical composition from other deep-sea clinoptilolites and heulandites. The dominant cation of both clinoptilolite and heulandite is Na+ ion activity in pore water was greater at the time of their formation. Volcanic glass has acted as a precursor for both clinoptilolite and heulandite at Sites 445 and 446. Biogenic silica is also suggested as a precursor. High Na+ ion activity in pore water also helped to transform clinoptilolite and heulandite to analcite downhole. The necessary Na+ ions for this clinoptilolite, heulandite and analcite at Sites 445 and 446 might have been provided by hydrothermal circulation of seawater through more permeable sandstones deposited during early stages of back-arc basin rifting. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_700011 |
| institution | PANGAEA |
| language | en |
| publishDate | 1988 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Chemical composition of zeolites in sandstones at DSDP Sites 445 and 446 Lee, Yong Il 58-445; 58-446; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg58; North Pacific/BASIN; North Pacific/Philippine Sea/BASIN Andesitic volcaniclastic sandstones of Middle Eocene age recovered from DSDP Sites 445 and 446, a back-arc basin, contain clinoptilolite, heulandite and analcite as a pore-filling cement. Clinoptilolite and heulandite at Sites 445 and 446 contain different chemical composition from other deep-sea clinoptilolites and heulandites. The dominant cation of both clinoptilolite and heulandite is Na+ ion activity in pore water was greater at the time of their formation. Volcanic glass has acted as a precursor for both clinoptilolite and heulandite at Sites 445 and 446. Biogenic silica is also suggested as a precursor. High Na+ ion activity in pore water also helped to transform clinoptilolite and heulandite to analcite downhole. The necessary Na+ ions for this clinoptilolite, heulandite and analcite at Sites 445 and 446 might have been provided by hydrothermal circulation of seawater through more permeable sandstones deposited during early stages of back-arc basin rifting. |
| title | Chemical composition of zeolites in sandstones at DSDP Sites 445 and 446 |
| topic | 58-445; 58-446; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg58; North Pacific/BASIN; North Pacific/Philippine Sea/BASIN |
| url | https://doi.org/10.1594/PANGAEA.700011 |