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U–Pb geochronology, geochemistry, and provenance of the Grenvillian Huiznopala Gneiss of Eastern Mexico
Abstract The Huiznopala Gneiss is the smallest (∼25 km2) of four exposures of Grenvillian granulites in eastern and southern Mexico. The Gneiss comprises three major lithologic units: (1) a mainExpand
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Insights into mid-ocean ridge basalt petrogenesis: U-series disequilibria from the Siqueiros Transform, Lamont Seamounts, and East Pacific Rise
Parent-daughter disequilibria between (230Th)/(238U), (231Pa)/(235U) and (226Ra)/(230Th) (parentheses refer to activities) have been measured by thermal ionization mass spectrometry and inductivelyExpand
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A multiproxy approach to reconstructing sea surface conditions using coral skeleton geochemistry
[1] We use elemental ratio (Mg/Ca, Sr/Ca, U/Ca and Ba/Ca) and oxygen isotope data from a Porites lutea coral head collected from offshore Amedee Island, New Caledonia (22°29′S, 166°28′E) to assessExpand
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WISSARD at Subglacial Lake Whillans, West Antarctica: scientific operations and initial observations
Abstract A clean hot-water drill was used to gain access to Subglacial Lake Whillans (SLW) in late January 2013 as part of the Whillans Ice Stream Subglacial Access Research Drilling (WISSARD)Expand
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Seismogenic zone structure beneath the Nicoya Peninsula, Costa Rica, from three‐dimensional local earthquake P‐ and S‐wave tomography
The subduction plate interface along the Nicoya Peninsula, Costa Rica, generates damaging large (Mw > 7.5) earthquakes. We present hypocenters and 3-D seismic velocity models (VP and VP/VS)Expand
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Generation of voluminous silicic magmas and formation of mid-Cenozoic crust beneath north-central Mexico: evidence from ignimbrites, associated lavas, deep crustal granulites, and mantle pyroxenites
Abstract Isotopic and trace element data from mantle and granulite xenoliths are used to estimate the relative contributions of mantle and crustal components to a large ignimbrite, referred to as theExpand
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The geochemistry of the Inyo Volcanic Chain: Multiple magma systems in the Long Valley Region, eastern California
Chemical data from the Inyo volcanic chain of eastern California illustrate that the most recent eruption (about 600 years B.P.) sampled at least two separate magmatic systems. Two rhyolitic lavaExpand
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Possible evidence for a large decrease in seawater strontium/calcium ratios and strontium concentrations during the Cenozoic
article i nfo Few constraints exist on the major element chemistry of ancient oceans. Turritellid marine snails precipitate aragonitic shells and are abundant in the Cenozoic fossil record, andExpand
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Testing crustal melting models for the origin of flood rhyolites: A Nd‐Pb‐Sr isotopic study of the Tertiary Davis Mountains volcanic field, west Texas
Flood rhyolites are lavas that have areal extents similar to large ignimbrites. The Davis Mountains volcanic field differs from most other Cenozoic volcanic fields in the southwestern United StatesExpand
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