 | | Journal (article/letter/editorial) | | 1980 Megacrysts and Xenoliths in Kimberlite, Elliott County, Kentucky: A Mantle Sample from Beneath the...Tennessee, Knoxville, TN 37916, USA Abstract. Two kimberlite pipes in Elliott County con- tain rare ultramafic...matrix of olivine (Foss-92), picroilmenite, Cr-spinel, magnetite, perovskite, pyrrhotite, calcite, and...and 47-49 kb. Spinel peridotites have discordant temperatures of 720 ~ 835~ (using spinel-olivine Fe/Mg)...result of an increase in fo ~. Introduction Kimberlite diatremes and dikes characteristically provide |  | | Journal (article/letter/editorial) | | Petrogenesisof pyroxene-oxideintergrowths from kimberlite and cumulaterocks: co-precipitationor exsolution... nodular pyroiene-ilmenite intergrowths from kimberlite, (2) "myrmekitic" pyroxene-oxide intergiowths...rocks and mantle xenoliths, and (3) fne lamelJof spinel or ;lmenite in pyroxenes from cumulate rocks and...intergrowths and an ilmenite-spinel websterite from the Elliott County kim_ berlite, Kentucky and a cumulate norite...norite from a small gabbroic pluton from Chester County, South Carolina has revealedintergrowths representingall |  | Robles-Cruz, Sandra E., Watangua, Manuel, Isidoro, Leonardo, Melgarejo, Joan C., Galí, Salvador, Olimpio, Antonio (2009) Contrasting compositions and textures of ilmenite in the Catoca kimberlite, Angola, and implications in exploration for diamond. Lithos, 112. 966-975 doi:10.1016/j.lithos.2009.05.040 | Journal (article/letter/editorial) | | compositions and textures of ilmenite in the Catoca kimberlite, Angola, and implications in exploration for...Ilmenite Kimberlite Diamond Fluid Texture Composition a b s t r a c t The Catoca group-I kimberlite, the...exclude the presence of diamond crystals in a kimberlite. Compositional attributes must thus be considered...the production being obtained from the Catoca kimberlite, in Lunda Sul province, in northeastern Angola...Angola. Catoca, currently the unique active kimberlite mine in Angola, is located in the Lucapa structure |  | | Journal (article/letter/editorial) | | Liqhobong, De Beers, and Benfontein. New analyses of spinel, ilmenite, and perovskite from the lower Benfontein...crystallization appears to be typical of carbonate-rich kimberlite magmas, and is texturally related to the two...carbonate-kimberlites. Thus, early Mg-ilmenite and Cr-rich spinel are separated by reaction textures and carbonate...simplified paragenetic scheme, and in particular the spinel trend, is repeated in the five other carbonate-kimberlites...pre-fluidization to post-fluidization stages of kimberlite emplacement (Haggerty, 1973; Mitchell & Clarke |  | | Journal (article/letter/editorial) | | com/locate/epsl Timing of eastern North American kimberlite magmatism: continental extension of the Great...Twenty-nine new high precision U^Pb perovskite ages for kimberlite and other CO2 -rich ultrabasic rocks, primarily...Mesozoic kimberlite magmatism can be distinguished. These new data document four periods of kimberlite magmatism...NW^SE Triassic to Cretaceous age progression in kimberlite magmatism, which is consistent with the relative...during this interval. This age progression in kimberlite magmatism extends for more than 2000 km from |  | | Report (issue) | | xenoliths . 61 Jane E. Nielson and Jay S. Noller Kimberlite-transported nodules from Colorado- Wyoming; A...relationship . 91 James K. Meen Magma mixing and kimberlite genesis; Mineralogic, petrologic, and trace element...Breccia, southeast Kalimantan, Indonesia: Intrusive kimberlite breccia or sedimentary conglomerate? . S. C....A note on newly discovered kimberlites in Riley County, Kansas William L. Mansker, Bill D. Richards, and...petrography of the Twin Knobs ttl lamproite, Pike County, Arkansas . 205 Michael A. Waldman, Tom E. McCandless |  | | Journal (article/letter/editorial) | | The timing of kimberlite magmatism in North America: implications for global kimberlite genesis and diamond...compilation of more than 100 kimberlite age determinations, four broad kimberlite emplacement patterns can...Saskatchewan, central USA), and (4) a western mixed (Cambrian-Eocene) Type 3 kimberlite province (Alberta...Within the Type 3 Slave craton, at least four kimberlite age domains exist: I-a southwestern Siluro-Ordovician...mixed domain consisting of Jurassic and Permian kimberlite fields. New U – Pb perovskite results for the |  | | Journal (issue) | | barite mineralisation in the Magnesian Limestone o f County D u r h a m . J . G. Mitchell, P. N. Rands & P...The craton o f the central and E interior of the USA was intruded in the post-Precambrian almost exclusively...deep-seated E- W boundaries o f the basement of the USA, the E- W fracture zones o f the E Pacific basin...ore-forming fluids. Examples are given from the USA. N China and central Asia. R.E.S. 90M/0276 C o r...t h e Sierrita porphyry copper deposit, Arizona, USA. E. Y. Anthony & S. R. Tilley, in: Proceedings o |
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