10.1594/PANGAEA.700011
Lee, Yong Il
Yong Il
Lee
Chemical composition of zeolites in sandstones at DSDP Sites 445 and 446
PANGAEA
1988
Drilling/drill rig
Leg58
Glomar Challenger
Deep Sea Drilling Project (DSDP)
1978-01-11T00:00:00/1978-01-18T00:00:00
en
Supplementary Publication Series of Datasets
10.1016/0009-2541(88)90132-5
2 datasets
application/zip
Creative Commons Attribution 3.0 Unported
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.
Supplement to: Lee, Yong Il (1988): Chemistry and origin of zeolites in sandstones at DSDP Sites 445 and 446, Daito Ridge and Basin Province, northwest Pacific. Chemical Geology, 67(3-4), 261-273
132.7748
133.2082
24.7007
25.5227
North Pacific/BASIN
North Pacific/Philippine Sea/BASIN