https://bereket-haileab.geology.sites.carleton.edu/files/original/de06f0ce413b6060b294932a07387854.jpg c04779b2f01e486c71823f7f1f023410 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 BH250-49 Subject The topic of the resource Sacred Heart Granite Description An account of the resource Major Minerals: microcline, orthoclase, quartz <br />Minor Minerals: albite, biotite, muscovite, chlorite (pennite), sphene (titanite), zicon, monazite, oxides<br /><br />Mineralogy Comments: thin sections contain myrmekite<br />Alteration: orthoclase and plagicalse are altered to sercite (white mica), biotite to chlorie alteration<br /><br />BH250-49 is from the Sacred Heart Granite near Belview, Minnesota—one of our regular stops on field trips to the Minnesota River Valley. The Sacred Heart Granite is a Neoarchean pluton that intruded the older Morton and Montevideo gneiss complexes around 2.604 Ga (2,604 million years ago). Recenlty Emma Watson a Carleton College student from the Class of 2023, worked on this rock and obtained revised age determinations for the pluton.<br /><br />The intrusion represents the final phase of high-grade metamorphic and deformational events that produced the Morton Gneiss and surrounding metamorphic rocks, closely tied to the last stages of Neoarchean convergent tectonics in the region.<br /><br />BH250-49 is a medium-grained, massive, and typically pink to gray granite, generally fresh and only weakly deformed relative to the surrounding gneisses. Its modal composition is approximately 40% K-feldspar, 30% oligoclase (a plagioclase feldspar), and 25% quartz, with subordinate amounts of biotite.<br /><br /><br /><iframe width="1800" height="100" src="https://docs.google.com/spreadsheets/d/e/2PACX-1vS4nyqCmZQGn3t6vX4g4nhDPwHMBaKrigt1LaY2pykWbBGXB1wNb6FYArx625I-JTtD7lyg4uz1OS1r/pubhtml?gid=861277415&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: near Sacred Heart, Minnesota, USA GPS Coordinates: 44°39'28.95"N, 95°20'17.19"W Source A related resource from which the described resource is derived From the rock collection of Bereket Haileab. Sample BH250-49. 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=d15b9b9ff56343b2a7f7fb383389579b" 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=d15b9b9ff56343b2a7f7fb383389579b">here</a><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1xV9z6lt_GaXvxOhVhKLsrLJeM9sx8kAb/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1HHxB1Kf8w7AokVk0q0W42MHQ03v8epLM/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1mAUsGHUCPcwVMSEBJgLyMn1lWp6ClTci/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1X8sdx-v5spXwu-54zOyaw_OF-6UNuDa5/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1IPz1fSoJK5xSSrQ8TScgUXqCPKRg_4vA/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1AvEcO2Cdp0WldKFv2jgSfpmQTlvSvPRx/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1jGCyph761elgX5LxhvELx4P4WnDL6rIw/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1t5iZPoGpphPPSGJimdT--HhXYjBniCLP/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/18QucXLxZTH654KBYCHdYaOsnnypx9feI/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/13oTDzDW3JzV2wQILfKezfl3xmXdT8uyc/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1SVQXdxCPpj_XGtXtJQ55jvebjl6lhHST/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1IEkAGJuoz1YFkyooQRLoGW-nqcLI7p-y/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1JvLMkCCNR9CjUGT1KUnqPykLOivYi8Df/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1jzx2d2aQQBDTQSsIjX3prjiFyls7y1sA/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/134zJZG_GvAyRdwaQNQJpTi3A7LTVAP3b/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1xh_SJO6zmhdn8xG1akxfBjUVXO79pgTd/preview" allow="autoplay"></iframe><br />TAS diagram of sample BH250-49. Creator An entity primarily responsible for making the resource Bereket Haileab #Granite adamellite albite Belview MN Biotite Biotite to chlorite alteration Chlorite (pennite) Feldspar alteration felsic felsic igneous rock granite igneous microcline Minnesota Minnesota River Valley monazite Montevideo Gneiss Morton Gneiss muscovite myrmekite Neoarchean orthoclase Oxides plutonic Quartz Sacred Heart Sacred Heart Granite sericite alteration sericitization Sphene Titanite Zircon