Chlorine stable isotope compositions (delta37Cl) of 22 mid-ocean ridge basalts (MORBs) correlate with Cl content. The high-delta37Cl, Cl-rich basalts are highly contaminated by Cl-rich materials (seawater, brines, or altered rocks). The low-delta37Cl, Cl-poor basalts approach the composition of uncontaminated, mantle-derived magmas. Thus, most or all oceanic lavas are contaminated to some exten...

The origin and stability of deep-mantle melts, and the magmatic processes at different times of Earth's history are controlled by the physical properties of constituent silicate liquids. Here we report density functional theory-based simulations of model basalt, hydrous model basalt and near-MORB to assess the effects of iron and water on the melt structure and density, respectively. Our result...

cocal vaccine effectiveness among HIV-infected individuals. Clin Infect Dis 2008; 47:294–5. 2. Masur H, Kaplan JE, Holmes KK; U.S. Public Health Service; Infectious Diseases Society of America. Guidelines for preventing opportunistic infections among HIV-infected persons—2002. Recommendations of the U.S. Public Health Service and the Infectious Diseases Society of America. Ann Intern Med 2002; ...

Long-lived heterogeneities in the mantle are indicated by Nd-Sr-Pb isotopic systematics. Explanations for these variations have invoked either distinct layers in the earth that are preferentially tapped by some source regions (such as plumes rising from the base of the mantle) or small-scale heterogeneities which are ubiquitously distributed through the mantle and tapped differentially in vario...

The remnant rear-arc segment of the early Izu-Bonin arc, known as Kyushu-Palau Ridge (KPR), is a key location where magmatic outputs can be constrained during lifetime an island arc. We present new geochemical data for coarse-grained basaltic to andesitic volcaniclastic sandstones derived from KPR and deposited in Amami Sankaku Basin (IODP Site U1438, Unit III rocks) time period 40–30 Ma. Bulk ...

with and without other evidence of central nervous system pathology. Appl Neuropsychol 1999;6:3–11. 18 Kaplan RF, Meadows ME, Vincent LC, Logigian EL, Steere AC. Memory impairment and depression in patients with Lyme encephalopathy: comparison with fibromyalgia and nonpsychotically depressed patients. Neurology 1992;42:1263–67. 19 Bujak DI, Weinstein A, Dornbush RL. Clinical and neurocognitive ...