Book Chapter10.1029/GM077P0233
Geochemistry and Age of the Ontong Java Plateau
John J. Mahoney,Michael Storey,Robert A. Duncan,K.J. Spencer,Malcolm S. Pringle +4 more
- 18 Mar 2013
- Vol. 77, pp 233-261
243
About: The article was published on 18 Mar 2013. The article focuses on the topics: Plateau.
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Geochemical fingerprinting of oceanic basalts with applications to ophiolite classification and the search for Archean oceanic crust
TL;DR: Two geochemical proxies are particularly important for the identification and classification of oceanic basalts: the Th-Nb proxy for crustal input and hence for demonstrating an oceanic, non-subduction setting; and the Ti-Yb proxy, for melting depth and hence indicating mantle temperature and thickness of the conductive lithosphere as mentioned in this paper.
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Large igneous provinces: crustal structure, dimensions, and external consequences
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TL;DR: In this article, the authors compile all known in situ LIPs younger than 250 Ma and analyze dimensions, crustal structures, ages, and emplacement rates of representatives of the three major LIP categories: Ontong Java and Kerguelen-Broken Ridge oceanic plateaus, North Atlantic volcanic passive margins, and Deccan and Columbia River continental flood basalts Crustal thickness ranges from 20 to 40 km, and the lower crust is characterized by high (70-76 km s?1) compressional wave velocities.
Oceanic anoxic events and plankton evolution: Biotic response to tectonic forcing during the mid-Cretaceous
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Overview of the genesis and emplacement of Mesozoic ophiolites in the Eastern Mediterranean Tethyan region
TL;DR: The Eastern Mediterranean region exhibits a fascinating diversity of ophiolites and related oceanic magmatic units of mainly Triassic, Jurassic and Cretaceous age as discussed by the authors, and the widespread occurrence of andesitic extrusives, chemically depleted basalts and highly magnesian lavas (boninites), favour formation of most of the large, relatively intact ophiolaites in the Eastern Mediterranean regions above subduction zones rather than at mid-ocean ridges (MORs).
619
The timing and duration of the Karoo igneous event, southern Gondwana
TL;DR: In the early Jurassic period, a volcanic event of immense scale occurred within a relatively short period in early Jurassic time over large regions of the contiguous Gondwana supercontinent as mentioned in this paper.
References
Implications of mantle plume structure for the evolution of flood basalts
TL;DR: In this article, the authors compare the physical and chemical characteristics of two flood basalt provinces (the Deccan and Karoo) with predictions of the dynamical model and conclude that the high-temperature melts associated with continental flood basalts are derived from hot, relatively uncontaminated plume-source mantle at the plume axis.
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Heterogeneous mantle domains: signatures, genesis and mixing chronologies
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932
ICP-MS — A powerful tool for high-precision trace-element analysis in Earth sciences: Evidence from analysis of selected U.S.G.S. reference samples
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682
Rare Earth Elements in Petrogenetic Studies of Igneous Systems
TL;DR: In this paper, a detailed knowledge of the geochemistry of systems involving fluids, minerals, and melts would be required, and this knowledge is not available, thus, it is necessary to make inf erences based on the inf ormation we have.
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Calibration of the interlaboratory 40Ar39Ar dating standard, MMhb-1
TL;DR: In this article, the 40Ar-39Ar analyses of MMhb-1 have shown that the interlaboratory precision for K is 1.06% and for Ar is 189% and the new recommended age for the monitor is 5204 ± 1.7 Ma.
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