التفاصيل البيبلوغرافية
| العنوان: |
Trace element composition of IODP Site 304-U1309 and 305-U1309 (Table A2) |
| المؤلفون: |
Godard, Marguerite, Awaji, S, Hansen, Henry, Hellebrand, Eric, Brunelli, Daniele, Johnson, K, Yamasaki, T, Maeda, Jinichiro, Abratis, Michael, Christie, David M, Kato, Yasuhiro, Mariet, C, Rosner, Martin |
| المصدر: |
Supplement to: Godard, Marguerite; Awaji, S; Hansen, Henry; Hellebrand, Eric; Brunelli, Daniele; Johnson, K; Yamasaki, T; Maeda, Jinichiro; Abratis, Michael; Christie, David M; Kato, Yasuhiro; Mariet, C; Rosner, Martin (2009): Geochemistry of a long in-situ section of intrusive slow-spread oceanic lithosphere: Results from IODP Site U1309 (Atlantis Massif, 30°N Mid-Atlantic-Ridge). Earth and Planetary Science Letters, 279(1-2), 110-122, https://doi.org/10.1016/j.epsl.2008.12.034 |
| بيانات النشر: |
PANGAEA |
| سنة النشر: |
2009 |
| المجموعة: |
PANGAEA - Data Publisher for Earth & Environmental Science (AWI Bremerhaven / MARUM Bremen) |
| مصطلحات موضوعية: |
304-U1309B, 304-U1309D, 305-U1309D, Barium, Cadmium, Caesium, Cerium, Chromium, Comment, Comment 2 (continued), Copper, DEPTH, sediment/rock, DRILL, Drilling/drill rig, DSDP/ODP/IODP sample designation, Dysprosium, Erbium, Europium, Event label, Exp304, Exp305, Gadolinium, Hafnium, Holmium, Integrated Ocean Drilling Program / International Ocean Discovery Program, IODP, Joides Resolution, Lanthanum, Lead |
| جغرافية الموضوع: |
MEDIAN LATITUDE: 30.112926 * MEDIAN LONGITUDE: -42.079333 * SOUTH-BOUND LATITUDE: 30.001667 * WEST-BOUND LONGITUDE: -42.119000 * NORTH-BOUND LATITUDE: 30.168650 * EAST-BOUND LONGITUDE: -42.000000 * MINIMUM DEPTH, sediment/rock: 2.07 m * MAXIMUM DEPTH, sediment/rock: 1377.60 m |
| الوصف: |
IODP Site U1309 was drilled at Atlantis Massif, an oceanic core complex, at 30°N on the Mid-Atlantic Ridge (MAR). We present the results of a bulk rock geochemical study (major and trace elements) carried out on 228 samples representative of the different lithologies sampled at this location. Over 96% of Hole U1309D is made up of gabbroic rocks. Diabases and basalts cross-cut the upper part of the section; they have depleted MORB compositions similar to basalts sampled at MAR 30°N. Relics of mantle were recovered at shallow depth. Mantle peridotites show petrographic and geochemical evidence of extensive melt-rock interactions. Gabbroic rocks comprise: olivine-rich troctolites (> 70% modal olivine) and troctolites having high Mg# (82-89), high Ni (up to 2300 ppm) and depleted trace element compositions (Yb 0.06-0.8 ppm); olivine gabbros and gabbros (including gabbronorites) with Mg# of 60-86 and low trace element contents (Yb 0.125-2.5 ppm); and oxide gabbros and leucocratic dykes with low Mg# (< 50), low Ni (~65 ppm) and high trace element contents (Yb up to 26 ppm). Troctolites and gabbros are amongst the most primitive and depleted oceanic gabbroic rocks. The main geochemical characteristics of Site U1309 gabbroic rocks are consistent with a formation as a cumulate sequence after a common parental MORB melt, although (lack of systematic) downhole variations indicate that the gabbroic series were built by multiple magma injections. In detail, textural and geochemical variations in olivine-rich troctolites and gabbronorites suggest chemical interaction (assimilation?) between the parental melt and the intruded lithosphere. Site U1309 gabbroic rocks do not represent the complementary magmatic product of 30°N volcanics, although they sample the same mantle source. The bulk trace element composition of Site U1309 gabbroic rocks is similar to primitive MORB melt compositions; this implies that there was no large scale removal of melts from this gabbro section. The occurrence of such a large magmatic sequence ... |
| نوع الوثيقة: |
dataset |
| وصف الملف: |
text/tab-separated-values, 7995 data points |
| اللغة: |
English |
| Relation: |
https://doi.pangaea.de/10.1594/PANGAEA.723697; https://doi.org/10.1594/PANGAEA.723697 |
| DOI: |
10.1594/PANGAEA.723697 |
| الاتاحة: |
https://doi.pangaea.de/10.1594/PANGAEA.723697
https://doi.org/10.1594/PANGAEA.723697 |
| Rights: |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported ; Access constraints: unrestricted ; info:eu-repo/semantics/openAccess |
| رقم الانضمام: |
edsbas.91078F94 |
| قاعدة البيانات: |
BASE |