Microanalytical trace element techniques (such as ion probe or laser ablation ICP‐MS) are hampered by a lack of well characterized, homogeneous standards. Two silicate glass reference materials produced by National Institute of Standards and Technology (NIST), NIST SRM 610 and NIST SRM 612, have been shown to be homogeneous and are spiked with up to sixty one trace elements at nominal concentrations of 500 μg g‐1 and 50 μg g‐1 respectively. These samples (supplied as 3 mm wafers) are equivalent to NIST SRM 611 and NIST SRM 613 respectively (which are supplied as 1 mm wafers) and are becoming more widely used as potential microanalytical reference materials. NIST however, only certifies up to eight elements in these glasses. Here we have compiled concentration data from approximately sixty published works for both glasses, and have produced new analyses from our laboratories. Compilations are presented for the matrix composition of these glasses and for fifty eight trace elements. The trace element data includes all available new and published data, and summaries present the overall average and standard deviation, the range, median, geometric mean and a preferred average (which excludes all data outside ± one standard deviation of the overall average). For the elements which have been certified, there is a good agreement between the compiled averages and the NIST data. This compilation is designed to provide useful new working values for these reference materials.

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The Hawaiian-Emperor hotspot track has a prominent bend, which has served as the basis for the theory that the Hawaiian hotspot, fixed in the deep mantle, traced a change in plate motion. However, paleomagnetic and radiometric age data from samples recovered by ocean drilling define an age-progressive paleolatitude history, indicating that the Emperor Seamount trend was principally formed by the rapid motion (over 40 millimeters per year) of the Hawaiian hotspot plume during Late Cretaceous to early-Tertiary times (81 to 47 million years ago). Evidence for motion of the Hawaiian plume affects models of mantle convection and plate tectonics, changing our understanding of terrestrial dynamics.

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•5-and 3•5-km-thick sections of OJP crust in central Our principal study area was the northern part of the Kwaio Anticline, where the thickest exposures of the Malaita. As the deepest exposures of the plateau's crust yet sampled systematically, these sections present a unique Malaita Volcanic Group occur (Fig. 2a). The anticline is accessible via rivers that cut the basement and sedi-source of information on age, eruptive stratigraphy, petrogenesis, and mantle sources. In this paper, we characterize mentary sections in a SW-NE direction roughly perpendicular to the axis of the anticline, facilitating thickness the geochemical stratigraphy of the southern OJP crust recorded in these sections, and build upon previous work determination of all the lithostratigraphic units. The majority of the samples we discuss here were collected to examine what the isotopic and chemical variations reveal about the plateau's origin and the implications for from the Singgalo and Kwaimbaita rivers, where a lava section of estimated 3•5 km thickness (Petterson et al., the mantle source regions that fed plateau magmatism. 1997) forms the core of the anticline (Fig. 2b). The other sample area we discuss is the Kwara'ae Anticline (Fig. 2a), accessible via the Kwaiafa'a River and its tributary, STUDY AREA AND GENERAL FIELD the Bisula, where we sampled a basement section of CHARACTERISTICS OF OJP CRUST

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