Elemental data for composites from DSDP Sites 417A, 417D, and 418A
Fuente:
PANGAEA
Enregistré dans:
| Auteurs principaux: | , |
|---|---|
| Format: | Dataset Open Access |
| Langue: | en |
| Publié: |
PANGAEA
1994
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1867167660280643584 |
|---|---|
| author | Spivack, Arthur J Staudigel, Hubert |
| author_facet | Spivack, Arthur J Staudigel, Hubert |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | While the input of river-alkalinity into seawater is relatively well known, the complementary acidity production is poorly understood. Using the major-element budget of seafloor alteration of the upper 500 m of 120-Ma-old oceanic crust at DSDP/ODP Sites 417A, 417D and 418A in the central western Atlantic, we estimate the acidity flux associated with the low-temperature weathering of the upper oceanic crust. The acidity flux is calculated based on major-element fluxes and charge-balance considerations. The relevant chemical fluxes from seawater to the upper crust are 4.1+-0.1; 1.4+-1.4; 2.2+-0.6 and -12+-2 10**11 mol/yr for K, Mg, Na and silicate-Ca, respectively. The associated acidity flux is (3.5+-3)10**11 eq/y. Relative to continental weathering, these fluxes are significant for K and silicate-Ca, but are minor for Na, Mg and acidity. Thus, riverine fluxes of alkalinity are not significantly balanced by acidity fluxes from low-temperature upper ocean crust alteration. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_704818 |
| institution | PANGAEA |
| language | en |
| publishDate | 1994 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Elemental data for composites from DSDP Sites 417A, 417D, and 418A Spivack, Arthur J Staudigel, Hubert 51-417A; 51-417D; 52-418A; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg51; Leg52; North Atlantic/CONT RISE While the input of river-alkalinity into seawater is relatively well known, the complementary acidity production is poorly understood. Using the major-element budget of seafloor alteration of the upper 500 m of 120-Ma-old oceanic crust at DSDP/ODP Sites 417A, 417D and 418A in the central western Atlantic, we estimate the acidity flux associated with the low-temperature weathering of the upper oceanic crust. The acidity flux is calculated based on major-element fluxes and charge-balance considerations. The relevant chemical fluxes from seawater to the upper crust are 4.1+-0.1; 1.4+-1.4; 2.2+-0.6 and -12+-2 10**11 mol/yr for K, Mg, Na and silicate-Ca, respectively. The associated acidity flux is (3.5+-3)10**11 eq/y. Relative to continental weathering, these fluxes are significant for K and silicate-Ca, but are minor for Na, Mg and acidity. Thus, riverine fluxes of alkalinity are not significantly balanced by acidity fluxes from low-temperature upper ocean crust alteration. |
| title | Elemental data for composites from DSDP Sites 417A, 417D, and 418A |
| topic | 51-417A; 51-417D; 52-418A; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg51; Leg52; North Atlantic/CONT RISE |
| url | https://doi.org/10.1594/PANGAEA.704818 |