(Table DR1) Biogenic silica and chert in the Pacific Ocean, DSDP and ODP data
Fuente:
PANGAEA
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Dataset Open Access |
| Sprache: | en |
| Veröffentlicht: |
PANGAEA
2008
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1867170898435375104 |
|---|---|
| author | Moore, Theodore C |
| author_facet | Moore, Theodore C |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Evidence for the dissolution of biogenic silica at the base of pelagic sections supports the hypothesis that much of the chert formed in the Pacific derives from the dissolution and reprecipitation of this silica by hydrothermal waters. As ocean bottom waters flow into and through the crust, they become warmer. Initially they remain less saturated with respect to dissolved silica than pore water in the overlying sediments. With the diffusion of heat, dissolved ions, and to some extent the advection of water itself, biogenic silica in the basal part of the sedimentary section is dissolved. Upon conductively cooling, these pore waters precipitate chert layers. The most common thickness for the basal silica-free zone (20 m) lies below the most common height of the top of the chert interval above basement (50 m). This mode of chert formation explains the frequent occurrence of chert layers at very shallow subbottom depths in pelagic sections of the Pacific. It is also consistent with the common occurrence of cherts </=150 m above basement. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_723883 |
| institution | PANGAEA |
| language | en |
| publishDate | 2008 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table DR1) Biogenic silica and chert in the Pacific Ocean, DSDP and ODP data Moore, Theodore C 129-800; 129-801; 129-802; 130-803; 130-807; 138-847; 15-146; 15-150; 15-152; 16-157; 16-158; 16-162; 16-163; 167-1010; 17-164; 17-165; 17-166; 17-167; 17-169; 17-171; 18-173; 192-1183; 192-1185; 192-1186; 199-1215; 199-1217; 199-1218; 199-1219; 199-1220; 199-1221; 199-1222; 201-1225; 201-1226; 20-199; 202-1238; 206-1256; 21-207; 21-208; 30-289; 31-291; 31-292; 32-307; 33-315; 33-317; 35-323; 5-34; 61-462; 62-465; 67-495; 7-66; 85-572; Age, dated; Age, maximum/old; Age, minimum/young; Antarctic Ocean/PLAIN; Caribbean Sea/BASIN; Caribbean Sea/CONT RISE; COMPCORE; Composite Core; Deep Sea Drilling Project; Depth, bottom/max; Depth, top/min; Difference; DRILL; Drilling/drill rig; DSDP; Elevation of event; Event label; Glomar Challenger; Joides Resolution; Latitude of event; Layer thickness; Leg129; Leg130; Leg138; Leg15; Leg16; Leg167; Leg17; Leg18; Leg192; Leg199; Leg20; Leg201; Leg202; Leg206; Leg21; Leg30; Leg31; Leg32; Leg33; Leg35; Leg5; Leg61; Leg62; Leg67; Leg7; Leg85; Longitude of event; North Pacific/BASIN; North Pacific/CONT RISE; North Pacific/FAN; North Pacific/GUYOT; North Pacific/Philippine Sea/CONT RISE; North Pacific/Philippine Sea/TRENCH; North Pacific/PLAIN; North Pacific/RIDGE; North Pacific/SLOPE; North Pacific/TRENCH; North Pacific Ocean; Ocean Drilling Program; ODP; South Pacific/PLATEAU; South Pacific/RIDGE; South Pacific/Tasman Sea/CONT RISE; South Pacific Ocean Evidence for the dissolution of biogenic silica at the base of pelagic sections supports the hypothesis that much of the chert formed in the Pacific derives from the dissolution and reprecipitation of this silica by hydrothermal waters. As ocean bottom waters flow into and through the crust, they become warmer. Initially they remain less saturated with respect to dissolved silica than pore water in the overlying sediments. With the diffusion of heat, dissolved ions, and to some extent the advection of water itself, biogenic silica in the basal part of the sedimentary section is dissolved. Upon conductively cooling, these pore waters precipitate chert layers. The most common thickness for the basal silica-free zone (20 m) lies below the most common height of the top of the chert interval above basement (50 m). This mode of chert formation explains the frequent occurrence of chert layers at very shallow subbottom depths in pelagic sections of the Pacific. It is also consistent with the common occurrence of cherts </=150 m above basement. |
| title | (Table DR1) Biogenic silica and chert in the Pacific Ocean, DSDP and ODP data |
| topic | 129-800; 129-801; 129-802; 130-803; 130-807; 138-847; 15-146; 15-150; 15-152; 16-157; 16-158; 16-162; 16-163; 167-1010; 17-164; 17-165; 17-166; 17-167; 17-169; 17-171; 18-173; 192-1183; 192-1185; 192-1186; 199-1215; 199-1217; 199-1218; 199-1219; 199-1220; 199-1221; 199-1222; 201-1225; 201-1226; 20-199; 202-1238; 206-1256; 21-207; 21-208; 30-289; 31-291; 31-292; 32-307; 33-315; 33-317; 35-323; 5-34; 61-462; 62-465; 67-495; 7-66; 85-572; Age, dated; Age, maximum/old; Age, minimum/young; Antarctic Ocean/PLAIN; Caribbean Sea/BASIN; Caribbean Sea/CONT RISE; COMPCORE; Composite Core; Deep Sea Drilling Project; Depth, bottom/max; Depth, top/min; Difference; DRILL; Drilling/drill rig; DSDP; Elevation of event; Event label; Glomar Challenger; Joides Resolution; Latitude of event; Layer thickness; Leg129; Leg130; Leg138; Leg15; Leg16; Leg167; Leg17; Leg18; Leg192; Leg199; Leg20; Leg201; Leg202; Leg206; Leg21; Leg30; Leg31; Leg32; Leg33; Leg35; Leg5; Leg61; Leg62; Leg67; Leg7; Leg85; Longitude of event; North Pacific/BASIN; North Pacific/CONT RISE; North Pacific/FAN; North Pacific/GUYOT; North Pacific/Philippine Sea/CONT RISE; North Pacific/Philippine Sea/TRENCH; North Pacific/PLAIN; North Pacific/RIDGE; North Pacific/SLOPE; North Pacific/TRENCH; North Pacific Ocean; Ocean Drilling Program; ODP; South Pacific/PLATEAU; South Pacific/RIDGE; South Pacific/Tasman Sea/CONT RISE; South Pacific Ocean |
| url | https://doi.org/10.1594/PANGAEA.723883 |