https://bereket-haileab.geology.sites.carleton.edu/files/original/a71e356cbef2721f66466ea046cba83d.jpg 9a272d4cd9b6e796528dbbd4b8ec40e9 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Igneous Rocks Subject The topic of the resource This collection covers both volcanic and intrusive rocks, including rhyolites, granites, diorites, andesites, basalts, gabbros, diabases, pumices, obsidians, syenites, phonolites, peridotites, carbonatites, dacites, trachyte, dunites, xenoliths, ignimbrites, and pegmatites. Creator An entity primarily responsible for making the resource Bereket Haileab Source A related resource from which the described resource is derived Housed in Anderson Hall, Carleton College. Format The file format, physical medium, or dimensions of the resource Thin sections, thin section scans, hand samples, hand sample images, photomicrographs, chemical analyses (major elements, trace elements and REE analyses for selected samples). Thin section and hand sample Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource BH250-136 Subject The topic of the resource Peridotite Xenolith Description An account of the resource Major Minerals: olivine, augite, chromite, orthopyroxene<br /> <p data-start="0" data-end="341">The xenolith-rich outcrops at 19°46'11.7"N, 155°55'51.7"W are located between <span class="hover:entity-accent entity-underline inline cursor-pointer align-baseline"><span class="whitespace-normal">Kīholo Bay</span></span> and the flanks of <span class="hover:entity-accent entity-underline inline cursor-pointer align-baseline"><span class="whitespace-normal">Hualālai</span></span> on the island of Hawaiʻi. These outcrops consist of alkali basalt flows that contain abundant mantle xenoliths, providing direct samples of the sub-oceanic upper mantle.</p> <p data-start="343" data-end="797">The xenoliths are dominantly spinel peridotite, including lherzolite and harzburgite, composed primarily of olivine, orthopyroxene, clinopyroxene, and spinel. The coarse-grained textures of these xenoliths contrast with the fine-grained basaltic host, reflecting their origin as slowly cooled mantle rocks.</p> <p data-start="799" data-end="1202">These xenoliths were entrained during rapid ascent of basaltic magma derived from the Hawaiian hotspot. The relatively low viscosity and high ascent rates of these magmas facilitated the mechanical incorporation and preservation of mantle fragments, minimizing thermal and chemical re-equilibration with the host melt. As a result, many xenoliths retain primary mineralogical and geochemical signatures.</p> <p data-start="1204" data-end="1651" data-is-last-node="" data-is-only-node="">Geochemically, these peridotites record processes such as partial melting, melt extraction, and mantle metasomatism. Variations in mineral composition and trace element abundances provide constraints on the thermal structure, compositional heterogeneity, and evolutionary history of the lithospheric mantle beneath Hawaiʻi. These outcrops therefore represent an important natural laboratory for studying mantle dynamics in an ocean island setting.</p> <br /><iframe width="1800" height="100" src="https://docs.google.com/spreadsheets/d/e/2PACX-1vS4nyqCmZQGn3t6vX4g4nhDPwHMBaKrigt1LaY2pykWbBGXB1wNb6FYArx625I-JTtD7lyg4uz1OS1r/pubhtml?gid=1330888122&amp;single=true&amp;widget=true&amp;headers=false"></iframe> Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Location: Island of Hawai'i, HI, USA GPS Coordinates: 19°46'11.7"N, 155°55'51.7"W Date A point or period of time associated with an event in the lifecycle of the resource 2018 Source A related resource from which the described resource is derived From the rock collection of Bereket Haileab. Sample 136. Housed at Carleton College in Minnesota. Type The nature or genre of the resource Thin section and hand sample Relation A related resource <iframe width="100%" height="600" style="border: 0;" src="https://carleton.maps.arcgis.com/apps/instant/media/index.html?appid=877e27bbbfa34567b4d5a901198085fc" frameborder="0" allowfullscreen="allowfullscreen">iFrames are not supported on this page.</iframe><br />View on ArcGIS Online <a href="https://carleton.maps.arcgis.com/home/item.html?id=877e27bbbfa34567b4d5a901198085fc">here</a><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/19x9mmyUcMwmL8ErrCA8Ai-42-Kjp3cdn/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1T9gJng37yQbWKdYNXDJO9dsWKrgn62iI/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1k_fjmTba0BPPOse6YROmTklv3tJPoPil/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1d9KZN3sY_aSjXSF_DDvrhmK5r2CnEZnU/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1IskOMBb1j3jkc8r2-JUQUMzHInwBaPuJ/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1Tndq8PyQTFxx0VkvmUyVJAm7SJRtDqjV/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1gMjIsloN86BIWgO7O37bmFDYLVBQ8MUn/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1PU2MoiKqPSHdY7g6LLND8XD6tJMa2aBL/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1dpvbNEsaNRMPZbQSZ33l8eHN2XPF5mR8/preview" allow="autoplay"></iframe><br />TAS diagram of sample BH250-136. Creator An entity primarily responsible for making the resource Bereket Haileab gabbro igneous plutonic ultramafic xenolith