Creating A Research Writing Environment With Personalized Library Instruction

Inman E. Page Library participated in the ARCL's Assessment in Action project led by Academic Librarian kYmberly Keeton. This is the final project poster presented by Ms. Keeton at ALA's 2016 Annual at Orlando, Florida. The poster shows how one faculty library group comes together to explore assessing students’ writing intensive projects in three academic semesters within a scholarly learning space at a Historically Black College University.

Lithium isotopic composition of pore fluids and sediments in the Costa Rica subduction zone

Pore fluid and sediment Li concentrations and isotopic ratios provide important insights on the hydrology, sediment contribution to the arc volcanoes and fluid-sediment reactions at the dominantly non-accretionary Costa Rica subduction zone. Ocean Drilling Program Site 1039 in the trench axis provides a reference section of 400 m of the incoming sediments, and Site 1040, situated arcward from the trench, consists of a deformed sedimentary wedge and apron sediments, the décollement, and the partially dewatered underthrust sediment section. At the reference site, pore fluids show important isotopic variations (delta6Li=-21.7 to -37.8 per mil), reflecting the interplay of in situ alteration of volcanic material and ion exchange with clay minerals. In the basal section, a reversal of Li concentration and delta6Li toward seawater values is observed, providing supporting evidence for a lateral seawater flow system in the upper oceanic basement underlying this sediment section. At Site 1040, pore fluid of the lower deformed wedge sediments and within the décollement is enriched in Li and the isotopic compositions are relatively light, suggesting infiltration of a deep-seated fluid. The delta6Li value of -22 per mil of this Li-enriched fluid (261 µM), when compared with the delta6Li value of the subducted sediment section (-11 per mil), suggests that the deep source fluid originates from mineral fluid dehydration and transformation reactions at temperatures of 100 to 150°C, consistent with the temperature range of the up-dip seismogenic zone and of transformation of smectite to illite. The distribution of Li and its isotopes in the underthrust section are similar to those at the reference site, indicating near complete subduction of the incoming sediments and that early dewatering of the underthrust sediments occurs predominantly by lateral flow into the ocean. The hemipelagic clay-rich sediment section of the subducting plate carries most of the Li into this subduction zone, and the pelagic diatomaceous and nannofossil calcareous oozes contain little Li. The Li isotopes of both the clay-rich hemipelagic sediments and of the pelagic oozes are, however, similar, with delta6Li values of -9 to -12 per mil. The observations that (1) the delta6Li values of the underthrust sediments are distinctly lower than that of the mantle, and (2) the lavas of the Costa Rican volcanoes are enriched in Li and 7Li, provide an approximation of the contribution of the subducted sediments to the arc volcanoes. A first order mass balance calculation suggests that approximately half of the Li flux delivered by subducted sediments and altered oceanic crust into the Middle American Trench is recycled to the Costa Rican arc and at most a quarter of sedimentary Li is returned into the ocean through thrust faults, primarily the décollement thrust.

Prof. James V. Campbell Law Dept.

First Dean of University of Michigan Law School, 1859-1871. On verso: Sam B. Revenaugh's Photographic Establishment, 28 Huron Street, Ann Arbor, Michigan

Professor Kent, Law Department

Dean of University of Michigan Law School, 1883-1886

Henry S. Frieze

Professor of Latin and acting president of the University of Michigan. On verso: ornate photographer's stamp ... Verneuil. 34 Rue Dauphine, 34. Paris ... No. G2077

Professor Pattengill

On verso: Prof. Greek

Henry S. Frieze

Professor of Latin and acting president of the University of Michigan. On verso: North & Oswald Photographers. Toledo, Ohio. Established 1864. Take the Passenger Elevator at St. Clair Street Entrance, and Visit our New Studios, 45 Hall Block. Largest and finest in the West. All negatives preserved and Registered. Duplicates of this picture may be had at any time.

Lois T. McLaughlin

Lois Thompson Angell McLaughlin, daughter of James B. and Sarah C. Angell, wife of Andrew C. McLaughlin. On verso: Lois Angell (later Mrs. McLaughlin). J.E. Watson Grand Central Gallery, 4143 Monroe Ave., Detroit, Mich.