(Table 2, page 1376) Chemical analyses of manganese nodules and crusts from the South-western Pacific
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| Main Authors: | , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
1975
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| _version_ | 1867169111576936448 |
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| author | Glasby, Geoffrey P Summerhayes, Colin P |
| author_facet | Glasby, Geoffrey P Summerhayes, Colin P |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Phosphate deposits which apparently formed during the Miocene climatic optimum are widespread on the Chatham Rise and Camp bell Plateau, and on seamounts in the north Tasman Sea. They formed under oxidising conditions by the phosphatisation of older or contemporaneous foraminiferal oozes (Campbell Plateau and Chatham Rise) and coral limestones (Tasman Sea). The phosphorites of the rise and plateau were formed where current activity was sufficiently strong to prevent normal sedimentation, and now form lag deposits. After the Miocene, phosphorite formation ceased and was followed by manganese oxide deposition where conditions were highly oxidising on the eastern Campbell Plateau and north Tasman seamounts, and by glauconite formation in the much less oxidising environments of the western Campbell Plateau and the Chat ham Rise. The manganese deposits are not volcanogenic, as was formerly thought, but formed by slow precipitation from well oxygenated sea water. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_859430 |
| institution | PANGAEA |
| language | en |
| publishDate | 1975 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 2, page 1376) Chemical analyses of manganese nodules and crusts from the South-western Pacific Glasby, Geoffrey P Summerhayes, Colin P Argo; Atomic absorption spectrometry (AAS); Calculated from weight loss after ignition at 450 °C; Chromium; Cobalt; Copper; DEPTH, sediment/rock; Description; Dredge; DRG; ENDV; ENDV_F127; ENDV_F129; Event label; HMNZS Endeavour (1944); Horizon; Inductively coupled plasma atomic emission spectroscope (ICP-AES); Iron; Lead; Loss on ignition; Manganese; Molybdenum; Nickel; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; NOVA05AR-041D; NOVA05HO-03D; NOVA-A; NOVA-A41D; NOVA-H; NOVA-H3D; South Pacific Ocean; Southwest Pacific Ocean; Titanium; Vanadium; X-ray fluorescence (XRF) Phosphate deposits which apparently formed during the Miocene climatic optimum are widespread on the Chatham Rise and Camp bell Plateau, and on seamounts in the north Tasman Sea. They formed under oxidising conditions by the phosphatisation of older or contemporaneous foraminiferal oozes (Campbell Plateau and Chatham Rise) and coral limestones (Tasman Sea). The phosphorites of the rise and plateau were formed where current activity was sufficiently strong to prevent normal sedimentation, and now form lag deposits. After the Miocene, phosphorite formation ceased and was followed by manganese oxide deposition where conditions were highly oxidising on the eastern Campbell Plateau and north Tasman seamounts, and by glauconite formation in the much less oxidising environments of the western Campbell Plateau and the Chat ham Rise. The manganese deposits are not volcanogenic, as was formerly thought, but formed by slow precipitation from well oxygenated sea water. |
| title | (Table 2, page 1376) Chemical analyses of manganese nodules and crusts from the South-western Pacific |
| topic | Argo; Atomic absorption spectrometry (AAS); Calculated from weight loss after ignition at 450 °C; Chromium; Cobalt; Copper; DEPTH, sediment/rock; Description; Dredge; DRG; ENDV; ENDV_F127; ENDV_F129; Event label; HMNZS Endeavour (1944); Horizon; Inductively coupled plasma atomic emission spectroscope (ICP-AES); Iron; Lead; Loss on ignition; Manganese; Molybdenum; Nickel; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; NOVA05AR-041D; NOVA05HO-03D; NOVA-A; NOVA-A41D; NOVA-H; NOVA-H3D; South Pacific Ocean; Southwest Pacific Ocean; Titanium; Vanadium; X-ray fluorescence (XRF) |
| url | https://doi.org/10.1594/PANGAEA.859430 |