كتاب
Integrated Ocean Drilling Program Expedition 305 preliminary report oceanic core complex formation, Atlantis Massif oceanic core complex formation, Atlantis Massif, Mid-Atlantic Ridge: Drilling into the footwall and hanging wall of a tectonic exposure of deep, young oceanic lithosphere to study deformation, alteration, and melt generation
| العنوان: | Integrated Ocean Drilling Program Expedition 305 preliminary report oceanic core complex formation, Atlantis Massif oceanic core complex formation, Atlantis Massif, Mid-Atlantic Ridge: Drilling into the footwall and hanging wall of a tectonic exposure of deep, young oceanic lithosphere to study deformation, alteration, and melt generation |
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| المؤلفون: | Blackman D., Ildefonse B., John B. E., Ohara Y., Miller D. J., MacLeod C. J., Delius H., Abe N., Beard J. S., Brunelli D., Delacour A. G., Escartin J., Fryer P. B., Halfpenny A., Hansen H. -E., Harris A. C., Hasebe A. T., Hellebrand E., Ishimaru S., Johnson K. T. M., Karner G. D., Linek M., Mason O. U., Michibayashi K., Nozaka T., Rosner M., Suhr G., Tominaga M., Yamasaki T., Zhao X., Einaudi F., Abratis M. W., Andal E. S., Andreani M., Awaji S., Charney A., Christie D., Drouin M., Frost B. R., Gee J. S., Godard M., Grimes C. B., Hayman N. W., Hirose T., Hirth J. G., Maeda J., McCaig A. M., Morris A., Nakagawa T., Searle R. C., Von Der Handt A., Simpson A., Malone W., Grout R. M., Davis R., Crowder L. K., Peng C., Cortes M., Endris C., Graham D., Hodge M. J., Housley L. S., Jackson E., Kotze J. J., Maeda L., Moortgat E., Murphy M., Pretorius P., Weiss P., Wheatley R. M., Yabyabin Y., Espinosa J. |
| المساهمون: | Donna Blackman, Blackman, D., Ildefonse, B., John, B. E., Ohara, Y., Miller, D. J., Macleod, C. J., Delius, H., Abe, N., Beard, J. S., Brunelli, D., Delacour, A. G., Escartin, J., Fryer, P. B., Halfpenny, A., Hansen, H. -E., Harris, A. C., Hasebe, A. T., Hellebrand, E., Ishimaru, S., Johnson, K. T. M., Karner, G. D., Linek, M., Mason, O. U., Michibayashi, K., Nozaka, T., Rosner, M., Suhr, G., Tominaga, M., Yamasaki, T., Zhao, X., Einaudi, F., Abratis, M. W., Andal, E. S., Andreani, M., Awaji, S., Charney, A., Christie, D., Drouin, M., Frost, B. R., Gee, J. S., Godard, M., Grimes, C. B., Hayman, N. W., Hirose, T., Hirth, J. G., Maeda, J., Mccaig, A. M., Morris, A., Nakagawa, T., Searle, R. C., Von Der Handt, A., Simpson, A., Malone, W., Grout, R. M., Davis, R., Crowder, L. K., Peng, C., Cortes, M., Endris, C., Graham, D., Hodge, M. J., Housley, L. S., Jackson, E., Kotze, J. J., Maeda, L., Moortgat, E., Murphy, M., Pretorius, P., Weiss, P., Wheatley, R. M., Yabyabin, Y., Espinosa, J. |
| بيانات النشر: | Integrated Ocean Drilling Program USA College Station |
| سنة النشر: | 2005 |
| المجموعة: | Archivio della ricerca dell'Università di Modena e Reggio Emilia (Unimore: IRIS) |
| الوصف: | Integrated Ocean Drilling Program Expedition 305, a joint science program with Expedition 304, was designed to investigate the processes that control formation of oceanic core complexes, as well as the exposure of ultramafic rocks in very young oceanic lithosphere. Prior studies indicated that two main drill sites on Atlantis Massif, on the western rift flank of the Mid-Atlantic Ridge (MAR) at 30°N, could provide key constraints on the structure of the detachment fault zone, rock types exposed at shallow structural levels in the footwall, and their alteration history, as well as that of the volcanic succession in the hanging wall. Expedition 305 deepened Hole U1309D in the footwall of Atlantis Massif to 1415.5 meters below seafloor, with high recovery (average = 74.8%) of dominantly gabbroic rocks. Hole U1309D was logged twice, providing the opportunity for unprecedented core-logging integration for a deep borehole in the oceanic lithosphere. The recovered rocks range from dunitic troctolite, troctolite, (olivine) gabbro, and gabbronorite to evolved oxide gabbro that locally contains abundant zircon and apatite, and diabase. The texture of the dunitic troctolite suggests a cumulate origin. The gabbroic suite from Hole U1309D is among the most primitive recovered from the MAR, with Mg# ranging from 67 to 87. Although alteration mineral assemblages record cooling of gabbroic rocks from magmatic conditions to zeolite facies, a low-temperature phase that reflects alteration at temperatures <500°C is most significant. The overall trends in alteration and the changes in secondary mineralogy downhole suggest that there may be two separate secondary processes that have affected the footwall in the vicinity of Hole U1309D. In the upper ∼840 m, seawater-rock interactions may pervade the gabbroic sequence. Below that depth, the nature of and the fluctuations in degree and style of metamorphism are related to fluids of a different composition percolating along fault/ductile deformation zones. Hence, the core records an ... |
| نوع الوثيقة: | book part |
| اللغة: | English |
| العلاقة: | ispartofbook:Proceedings of the International Ocean Drilling Program; volume:305; firstpage:1; lastpage:78; alleditors:Donna Blackman; http://hdl.handle.net/11380/1248402Test; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-33845967072 |
| DOI: | 10.2204/iodp.pr.305.2005 |
| الإتاحة: | https://doi.org/10.2204/iodp.pr.305.2005Test http://hdl.handle.net/11380/1248402Test |
| حقوق: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.5C405CC |
| قاعدة البيانات: | BASE |
| DOI: | 10.2204/iodp.pr.305.2005 |
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