6. Centers for Disease Control and Prevention. Update: interim recommendations for antimicrobial prophylaxis for children and breastfeeding mothers and treatment of children with anthrax. MMWR Morb Mortal Wkly Rep 2001;50:1014-6. 7. Henderson DW, Peacock S, Belton FC. Observations on the prophylaxis of experimental pulmonary anthrax in the monkey. J Hyg 1956;54:28-36. 8. Langmuir A, Popova I, S...

Experimental petrology and major element chemistry are used to infer the melting processes that operate in the upper oceanic mantle to yield basaltic magma, and the subsequent cooling processes by which these magmas chill to form the oceanic crust. THE PRIMARY MAGMAS OF MID-OCEAN RIDGE BASALTS This paper reports experiments carried out between 9 and 16 kbar (0.9 1.6 GPa) using natural, primitiv...

Plate tectonics is thought to be a major driver of volatile redistribution on Earth. The budget nitrogen in Earth's mantle has been suggested almost entirely surface-derived. Recycling would contribute with relatively heavy 15N/14N isotope ratios mantle. This could explain why the ratio substantially higher than both solar gases and chondritic parent bodies akin enstatite chondrites. Here, publ...

Oxygen isotope ratios of olivine in 23 tholeiites from the Hawaii Scientific Drilling Project (HSDP) core (15 from Mauna Kea, 8 from Mauna Loa) and three samples of outcropping subaerial or dredged submarine Mauna Kea lavas have been measured by laser fluorination. The ~18o values are 4.6-5.4 %o, confirming previous observations that some Hawaiian lavas are derived from sources with ~18o values...

Abst rac t -Large parts of the Central Eastern Desert of Egypt consist of Neoproterozoic nappes of ophiolite and island-arc volcanic rocks. Beneath these nappes metamorphic basement domes are exposed in tectonic w indows such as the Meatiq basement. The mineral and whole rock chemistry of amphibol i tes included in the teconical ly lowermost granitoid gneiss, within the metasedimentary cover of...

Abstract The Oulongbuluke Block is an integral part of the Columbia and Rodinia supercontinents, but lack rock records from transitional period between supercontinents during mid–late Mesoproterozoic has impeded our understanding tectonic relationship Block, which lies supercontinents. In this contribution, we present a systematic petrographic, geochemical, zircon U-Pb-Hf investigation newly di...

[1] An in-depth Sr-Nd-Pb-He-Os isotope and trace element study of the EMII-defining Samoan hot spot lavas leads to a new working hypothesis for the origin of this high Sr/Sr mantle end-member. Systematics of the Samoan fingerprint include (1) increasing Pb/Pb with time from 18.6 at the older, western volcanoes to 19.4 at the present-day hot spot center, Vailulu’u Seamount, (2) en-echelon arrays...

Xe, produced from the radioactive decay of extinct I, and Xe, produced from extinct Pu and extant U, have provided important constraints on early mantle outgassing and volatile loss from Earth. The low ratios of radiogenic to non-radiogenic xenon (Xe/Xe) in ocean island basalts (OIBs) compared to mid-ocean ridge basalts (MORBs) have been used as evidence for the existence of a relatively undega...

1. Centers for Disease Control and Prevention. Poliomyelitis—Madagascar 2002. MMWR Morb Mortal Wkly Rep 2002;51:622. 2. Guillot S, Caro V, Cuervo N, Korotkova E, Combiescu M, Persu A, et al.] Natural genetic exchanges between vaccine and wild poliovirus strains in humans. J Virol 2000;74:8434–43. 3. Pringle CR. Virus taxonomy at the XIth International Congress of Virology, Sydney, Australia, 19...