G. bulloides dissolution index of surface sediments
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2002
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| _version_ | 1867169527538647040 |
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| author | Volbers, Andrea N A Henrich, Rüdiger |
| author_facet | Volbers, Andrea N A Henrich, Rüdiger |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The Atlantic is regarded as a huge carbonate depocenter due to an on average deep calcite lysocline. However, calculations and models that attribute the calcite lysocline to the critical undersaturation depth (hydrographic or chemical lysocline) and not to the depth at which significant calcium carbonate dissolution is observed (sedimentary calcite lysocline) strongly overestimate the preservation potential of calcareous deep-sea sediments. Significant calcium carbonate dissolution is expected to begin firstly below 5000 m in the deep Guinea and Angola Basin and below 4400 m in the Cape Basin. Our study that is based on different calcium carbonate dissolution stages of the planktic foraminifera Globigerina bulloides clearly shows that it starts between 400 and 1600 m shallower depending on the different hydrographic settings of the South Atlantic Ocean. In particular, coastal areas are severely affected by increased supply of organic matter and the resultant production of metabolic CO2 which seems to create microenvironments favorable for dissolution of calcite well above the hydrographic lysocline. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_57802 |
| institution | PANGAEA |
| language | en |
| publishDate | 2002 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | G. bulloides dissolution index of surface sediments Volbers, Andrea N A Henrich, Rüdiger 06MT41_3; Angola Basin; Ascencion Island; Brazil Basin; Calculated, see reference(s); Cape Basin; DEPTH, sediment/rock; Elevation of event; Equatorial Atlantic; Event label; GeoB; GeoB1001-1; GeoB1004-2; GeoB1005-2; GeoB1006-2; GeoB1008-6; GeoB1009-3; GeoB1011-2; GeoB1012-1; GeoB1013-2; GeoB1014-2; GeoB1015-2; GeoB1015-3; GeoB1016-2; GeoB1017-3; GeoB1018-2; GeoB1019-2; GeoB1020-1; GeoB1021-3; GeoB1022-3; GeoB1023-2; GeoB1024-3; GeoB1025-2; GeoB1026-3; GeoB1027-2; GeoB1028-2; GeoB1029-1; GeoB1030-3; GeoB1031-1; GeoB1032-2; GeoB1033-3; GeoB1034-1; GeoB1035-3; GeoB1036-3; GeoB1037-1; GeoB1039-1; GeoB1040-3; GeoB1041-1; GeoB1043-2; GeoB1044-3; GeoB1101-4; GeoB1102-3; GeoB1103-3; GeoB1106-5; GeoB1108-6; GeoB1109-4; GeoB1110-3; GeoB1111-5; GeoB1112-3; GeoB1113-7; GeoB1114-3; GeoB1115-4; GeoB1116-1; GeoB1117-3; GeoB1203-2; GeoB1204-3; GeoB1206-1; GeoB1207-2; GeoB1208-1; GeoB1209-1; GeoB1210-3; GeoB1211-1; GeoB1212-2; GeoB1213-2; GeoB1215-1; GeoB1216-2; GeoB1217-1; GeoB1218-1; GeoB1220-2; GeoB1401-1; GeoB1403-2; GeoB1404-8; GeoB1406-1; GeoB1414-2; GeoB1415-1; GeoB1417-2; GeoB1418-1; GeoB1701-2; GeoB1702-7; GeoB1703-3; GeoB1704-1; GeoB1707-2; GeoB1709-3; GeoB1710-2; GeoB1711-5; GeoB1712-2; GeoB1713-6; GeoB1714-1; GeoB1715-3; GeoB1717-2; GeoB1718-1; GeoB1719-4; GeoB1721-5; GeoB1724-4; GeoB1726-2; GeoB1728-3; GeoB1729-1; GeoB1808-7; GeoB1903-3; GeoB1904-1; GeoB1906-1; GeoB1907-1; GeoB3807-1; GeoB5002-1; GeoB5004-2; GeoB5006-1; GeoB5007-1; GeoB5115-2; GeoB5116-1; GeoB5117-2; GeoB5120-1; GeoB5121-2; GeoB5130-1; GeoB5132-2; GeoB5133-3; GeoB5134-1; GeoB5135-1; GeoB5136-2; GeoB5137-1; GeoB5138-2; Geosciences, University of Bremen; Giant box corer; GIK17851-1; GIK17866-1; GIK17884-1; GKG; Globigerina bulloides dissolution index (Volbers); Gravity corer (Kiel type); Guinea Basin; Kongo delta; Kongo sediment fan; Latitude of event; Longitude of event; M12/1; M16/1; M20/2; M22/1; M34/3; M41/2; M41/3; M6/6; M9/4; Meteor (1986); Mid Atlantic Ridge; Mid-Atlantic Ridge; MUC; MultiCorer; Namibia Continental Margin; Namibia continental slope; Niger Sediment Fan; Northern Guinea Basin; off Kunene; Sample code/label; SFB261; SL; SO84; Sonne; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents; ST. HELENA HOTSPOT; Walvis Ridge; West Angola Basin The Atlantic is regarded as a huge carbonate depocenter due to an on average deep calcite lysocline. However, calculations and models that attribute the calcite lysocline to the critical undersaturation depth (hydrographic or chemical lysocline) and not to the depth at which significant calcium carbonate dissolution is observed (sedimentary calcite lysocline) strongly overestimate the preservation potential of calcareous deep-sea sediments. Significant calcium carbonate dissolution is expected to begin firstly below 5000 m in the deep Guinea and Angola Basin and below 4400 m in the Cape Basin. Our study that is based on different calcium carbonate dissolution stages of the planktic foraminifera Globigerina bulloides clearly shows that it starts between 400 and 1600 m shallower depending on the different hydrographic settings of the South Atlantic Ocean. In particular, coastal areas are severely affected by increased supply of organic matter and the resultant production of metabolic CO2 which seems to create microenvironments favorable for dissolution of calcite well above the hydrographic lysocline. |
| title | G. bulloides dissolution index of surface sediments |
| topic | 06MT41_3; Angola Basin; Ascencion Island; Brazil Basin; Calculated, see reference(s); Cape Basin; DEPTH, sediment/rock; Elevation of event; Equatorial Atlantic; Event label; GeoB; GeoB1001-1; GeoB1004-2; GeoB1005-2; GeoB1006-2; GeoB1008-6; GeoB1009-3; GeoB1011-2; GeoB1012-1; GeoB1013-2; GeoB1014-2; GeoB1015-2; GeoB1015-3; GeoB1016-2; GeoB1017-3; GeoB1018-2; GeoB1019-2; GeoB1020-1; GeoB1021-3; GeoB1022-3; GeoB1023-2; GeoB1024-3; GeoB1025-2; GeoB1026-3; GeoB1027-2; GeoB1028-2; GeoB1029-1; GeoB1030-3; GeoB1031-1; GeoB1032-2; GeoB1033-3; GeoB1034-1; GeoB1035-3; GeoB1036-3; GeoB1037-1; GeoB1039-1; GeoB1040-3; GeoB1041-1; GeoB1043-2; GeoB1044-3; GeoB1101-4; GeoB1102-3; GeoB1103-3; GeoB1106-5; GeoB1108-6; GeoB1109-4; GeoB1110-3; GeoB1111-5; GeoB1112-3; GeoB1113-7; GeoB1114-3; GeoB1115-4; GeoB1116-1; GeoB1117-3; GeoB1203-2; GeoB1204-3; GeoB1206-1; GeoB1207-2; GeoB1208-1; GeoB1209-1; GeoB1210-3; GeoB1211-1; GeoB1212-2; GeoB1213-2; GeoB1215-1; GeoB1216-2; GeoB1217-1; GeoB1218-1; GeoB1220-2; GeoB1401-1; GeoB1403-2; GeoB1404-8; GeoB1406-1; GeoB1414-2; GeoB1415-1; GeoB1417-2; GeoB1418-1; GeoB1701-2; GeoB1702-7; GeoB1703-3; GeoB1704-1; GeoB1707-2; GeoB1709-3; GeoB1710-2; GeoB1711-5; GeoB1712-2; GeoB1713-6; GeoB1714-1; GeoB1715-3; GeoB1717-2; GeoB1718-1; GeoB1719-4; GeoB1721-5; GeoB1724-4; GeoB1726-2; GeoB1728-3; GeoB1729-1; GeoB1808-7; GeoB1903-3; GeoB1904-1; GeoB1906-1; GeoB1907-1; GeoB3807-1; GeoB5002-1; GeoB5004-2; GeoB5006-1; GeoB5007-1; GeoB5115-2; GeoB5116-1; GeoB5117-2; GeoB5120-1; GeoB5121-2; GeoB5130-1; GeoB5132-2; GeoB5133-3; GeoB5134-1; GeoB5135-1; GeoB5136-2; GeoB5137-1; GeoB5138-2; Geosciences, University of Bremen; Giant box corer; GIK17851-1; GIK17866-1; GIK17884-1; GKG; Globigerina bulloides dissolution index (Volbers); Gravity corer (Kiel type); Guinea Basin; Kongo delta; Kongo sediment fan; Latitude of event; Longitude of event; M12/1; M16/1; M20/2; M22/1; M34/3; M41/2; M41/3; M6/6; M9/4; Meteor (1986); Mid Atlantic Ridge; Mid-Atlantic Ridge; MUC; MultiCorer; Namibia Continental Margin; Namibia continental slope; Niger Sediment Fan; Northern Guinea Basin; off Kunene; Sample code/label; SFB261; SL; SO84; Sonne; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents; ST. HELENA HOTSPOT; Walvis Ridge; West Angola Basin |
| url | https://doi.org/10.1594/PANGAEA.57802 |