 | | Journal (article/letter/editorial) | | Petrogenesis of Eclogite Inclusions in the Moses Rock Dyke, Utah, U.S.A. S. L. Harley and D. H. Green With...mineralogy of fifteen eclogites from the Moses Rock kimberlitic dyke, Utah, has demonstrated complexity in compositional...jadeite type and zonal and irregular variation in grossular content of garnet and acmite, jadeite and diopside-hedenbergite...pyrope-rich rims without accompanying variation in grossular content. The simple interpretation of these samples...Petrogenese yon Eklogit-Einschliissen im Moses Rock Dyke, Utah, U. S. A. Eine detaillierte Studie der |  | | Journal (article/letter/editorial) | | Sciences, Universityof Texas Austin, Texas 78712, USA Abstract. Eclogite inclusions from kimberlitic diatremes...Jdss (rim). Pyroxene cores are Cr-rich in another rock. Sharp compositional discontinuities and zoning...Geology,StanfordUniversity, Stanford, CA 94305, USA * Introduction The eclogite inclusions in the...other types of rock fragments in a serpentine-rich matrix in the Garnet Ridge, Moses Rock, and Mule Ear...northern group of Plateau diatremes near the Arizona-Utah border at about 37 ~ N, 109 ~ 45"W (Watson, 1967) |  | Hofmeister, Anne M., Schaal, Rand B., Campbell, Karla R., Berry, Sandra L., Fagan, Timothy J. (1998) Prevalence and origin of birefringence in 48 garnets from the pyrope-almandine-grossularite-spessartine quaternary. American Mineralogist, 83 (11) 1293-1301 doi:10.2138/am-1998-11-1218 | Journal (article/letter/editorial) | | induced externally by tectonic deformation of the host rock. However, birefringence commonly observed in garnets...71-15-12-O-2-O -9-0 67-20-3-1 -0-0S 59-33-7-1 67-20-7-1-s-Ot Rock type/Hostoccurrence 47-40-13-0-0-0t 18-78-4-0-0-0S...Arizona Moses Rock Dike (anthill),Utah Moses Rock Dike, Utah Moses Rock Dike (anthill),Utah Moses Rock Dike...Dike, Utah BobbejaanKimberlite,SouthAfrica EmeraldCreek. LatahCo.. ldaho SDM-1 EGR-1X EGR-4X MOS-IX MOS-2X...geologicsetting Garnet compositions vary with the type of host rock and with geologic setting (enclosedareasof Fig. |  | | Report (chapter) | | crust and upper mantle xenoliths from Moses Rock Diatreme, Utah, has led to the discovery of evidence...fragment of the Farollan plate. Introduction Moses Rock Diatreme (Fig. 1) is a 6 km long fissure eruption...There are two contemporaneous Tertiary volcanic rock types occurring on the Colorado Plateau; a) Diatreme...microbreccia (SUM); a complex breccia of comminuted wall-rock and ultramafic material, held together by a fine...Park (Roden 1977) and Moses Rock (this study). The crystallization ages for these rock-types determined by |  | | Journal (article/letter/editorial) | | argillaceous and calcareous sediments in Riley County, east-central Kansas (Fig. 1). The diatremes are...brecciated rock which is often porphyritic in character. Depending upon the locality, the rock consists...xenoliths of locally derived calcareous country rock plus occasional xenoliths derived supposedly from...map of kimberlite diatremes that occur in Riley County, Kansas 62 H.O.A. Meyer and D. G. Brookins:...u e n t minerals, neither a representative whole rock chemical analysis, nor a modal analysis based on |  | | Journal (article/letter/editorial) | | observation of immiscibility in pyrope-almandine-grossular garnet LIPING WANG,* ERIC J. ESSENE, AND YOUXUE...low-temperature miscibility gap in the pyropealmandine-grossular garnet solid-solution series, coexistence of two...thermodynamic mixing models for pyrope-almandine-grossular garnet. INTRODUCTION SAMPLE AND ANALYTICAL METHODS...three end-members: almandine (Fe3Al2Si3O12), grossular (Ca3Al2Si3O12), and pyrope (Mg3Al2Si3O12). Garnet...inclusions are approximated by the pyrope-almandine-grossular system. The miscibility gap in this system has |  | | Journal (article/letter/editorial) | | (pomegranate) for the red color of its seeds. Grossular, also based on the Latin, is from Peter J. Modreski...the pale green color of the berry and of some grossular; but this name is actually predated in use by...now considered just a varietal term for orange grossular. Hessonite takes its meaning from the Greek ‘inferior’-meaning...mineralogist; and uvarovite is after Count s. s. Uvarov. Grossular and spessartine were formerly sometimes spelled...Connecticut (grossular), and Idaho (star garnet); and the state mineral of Connecticut. Garnet (grossular, variety |  | | Journal (article/letter/editorial) | | shown that for 6 ~ M g value of total rock <85 the total rock chemical composition does not perceptibly...Arizona eclogite X N e w Guinea I"1 California rock / I / ,, ,, / ..O 1~ / U.I ::~ !¢ I.J./ "...eclogite (2833) is an almandine + jadeite + quartz rock (2832, Green et al. 1968) which has a much higher...Na20 in 2832 compared with 6.7% NaaO in 2833). This rock indicates a higher minimum pressure at a given temperature...estimate P,T for the almandine + jadeite+ quartz rock cannot be strictly justified on the data available |  | | Journal (article/letter/editorial) | | of proper petrogenetic grid in appropriate bulk rock compositions to characterize the evolutionary path... but also reveals the histories of complex fluid-rock interactions whose direct evidences are often not...intergrowths has been discussed in terms of fluid-rock interaction during peak metamorphism and subsequent...Rickers et al. (2001). Disposition of different major rock types is plotted and indexed. Representative P–T...Shimliguda, situated at the central part of EGB. The rock hosting the studied garnet is foliated quartzofeldspathic |  | | Journal (article/letter/editorial) | | McGetchin from the Moses Rock diaInfrared spectra were obtained on doubly polished, treme, Utah, was usedas... SouthAfrica Rock Mica Mine, Yancy Co., N. Cor. Broken Hill, Australia MosesRock, Utah Chanthabud, Theiland...octahedral Al3+ garnets(pyrope, almandine,spessartine,grossular)as a singlegroup. One representativeend-membergrossularis...even though the IR pattern indicated that and grossular have a molar absorptivity (K) of around 5000 to...(1979)in a study of the thermophysical properties of grossular. They obtained a water content of 0.19 wt.Vo. |  | | Journal (article/letter/editorial) | | could have crystallized in high-pressure metamorphic rock of ultramafic/ mafic composition. In contrast, Thai...crystallized in high-grade metamorphic (gneissic) rock or from magmas of highly alkaline composition, located...inclusions are pyrope with high almandine and grossular components. Their compositions range from py56...gem garnet samples in alluvium in having higher grossular (Ca) contents than the other garnets and in the...It is associated with orange garnet (pyrope- grossular: py44 gro42 al14) (Sobolev, 1965), which is more |  | | Journal (article/letter/editorial) | | a study of inclusionsin pyropes from Moses Rock, Southern Utah, has shown that such pyropes are at leastin...this wide rangeof pyrope/ almandine ratios the grossular component of the garnet ranges between 4 and 11...of the three components pyrope' almandine and grossular, define a fairly narrow band parallel to the pyrope-almandine...values (0.84 to 0.39) and covers a wider range of grossular values, ftom 2 mole percent at the Mg-rich end...garnet compositions mav reflect a range in bulk rock compositions, a range of physical conditions of |  | | Journal (article/letter/editorial) | | relativelycommon in the Stockdalekimberlitepipe, Kansas.Two rock types in particular, a pyroxenite and a metagabbro...Severaligneous bodies intrude Permian sediments in Riley County, east-central Kansas. Brookins (1970) has describedthese...eclositic rocks. berlite diatremesthat occur in Riley County, Kansas has been presented by Brookins (1970)....diatremes are filled with dark to light green brecciated rock consisting of serpentinizedolivine, pyroxene' partially...proportions, xenoliths of locally derived country rock of possible basement origin; however, only the Stockdale |  | Garanin, V. K., Kudryavtseva, G. P., Marakushev, A. A., Cherenkova, A. F., Cherenkov, V. G. (1987) A NEW VARIETY OF DEEP-SEATED HIGH-ALUMINA ROCK IN KIMBERLITE PIPES. International Geology Review, 29 (11) 1366-1376 doi:10.1080/00206818709466231 | Journal (article/letter/editorial) | | com/loi/tigr20 A NEW VARIETY OF DEEP-SEATED HIGH-ALUMINA ROCK IN KIMBERLITE PIPES V. K. Garanin , G. P. Kudryavtseva...(1987) A NEW VARIETY OF DEEP-SEATED HIGH-ALUMINA ROCK IN KIMBERLITE PIPES, International Geology Review...20:37 A NEW VARIETY OF DEEP-SEATED HIGH-ALUMINA ROCK IN KIMBERLITE PIPES Downloaded by [University of...Aerogeologiya Or ganization. Xenoliths of a new rock type, named ferroalkremite, have been discovered...and the garnet belongs to the pyrope-almandine-grossular isomorphous series. These rocks were discovered |  | | Journal (article/letter/editorial) | | PyrrAl,rGr,o and PyroAlruGr,o,where Gr denotes grossular (Ca.AlrSirO,r). Data obtained from the two synthetic...Mn AltSrrO,r, and two natural samplesbearing grossular (Gr), CarAlrSirO,r, are included to assessthe...Roberts Victor Kimberlite,S. Africa Moses Rock Dike, UT Moses Rock Dike, UT MaconCo., NC synthetic polycrystal...mol% pyrope, 41.4 molToalmandine,and 4.7 mol7" grossular (Koziol and Newton 1989). used for samples 18...samples[which generallyhave low grossular (Gr) contentl, and grossular contents are shown for the 0 |  | | Book | | Contents 7 8 Grossular 90 Nomenclature and history 90 Grossular colours 91 Grossular chemistry: Ca 3...physical properties 95 Grossular inclusions 97 Sources for hessonite and colourless grossular Tsavolite garnet...Hydrogrossular 101 Unusual phenomenon grossular 101 Summary of grossular properties 102 Bibliography 102 ...Andradite 1.880-1.888 0.057 3.77-3.88 6½ Grossular 1.730-1.760 0.028 3.40-3.78. 7 P)TOJ>C 1.730-1...Andraditc Fe 3 Al2 (Si 0.ih Ca3 Fei (Si 0.ih Grossular Ca3 Ah(SiO4h Orangy-red, red, violet-red Green |  | | Journal (issue) | | 50th show by Helen Serras-Herman REGULAR COLUMNS Rock & Gem Kids .......................................Shop Talk .................................20 30 Rock Science ..........................28 What to Cut...advertisements. For this reason, advertisements appearing in Rock & Gem should be considered as requests to inquire...notice. 4 www.rockngem.com rg_toc_0914.indd 4 Rock & Gem (ISSN 0048-8453, USPS 486-290) is published...Beckett Media LLC. POSTMASTER: Send address changes to Rock & Gem, c/o Beckett Media, 4635 McEwen Rd., Dallas |  | | Journal (article/letter/editorial) | | high-pressure transformations of natural garnets (pyrope, grossular and Fe-rich garnet) have been prepared at high...member (grossular). (3) A garnet of (Mg,.,,,,Fe,.,,,,Ca,.~~~,Mnaoos)3composition from Moses (Al,,,, Cr...Cr,,,,),Si,O,, Rock, Arizona, USA. Table 1 Electron microprobe (Camebax) in the experiments (compositions...used are normalized to 100 wt% Oxides Pyrope Grossular Garnet SiOz TiO, 44.14 0.05 28.90 1.68 _ 39...In contrast, the Fig. 4. The decomposition of grossular at 40 GPa and low temperature into a glass of |  | | Book | | have concentrated on kimberlite as an individual rock-type and a sampler of the upper mantle, in the hope...1 7.5.1.1 7.5.1.2 7.5.1.3 7.5 .1.4 7.5.1.5 Wall-Rock Fragments .................. Fragments from Earlier.... . . . .. 200 9.1 9.2 9.3 9.4 Distribution of Rock-Types Within the Upper Mantle . . . . . . . . ..... . . . . . . . . . . . Relationship with Other Rock Types. . . . The Kimberlite-Carbonatite Relationship...a rare and volumentrically insignificant igneous rock. What, then, are the reasons for studying it? First |  | | Journal (article/letter/editorial) | | by Hattori et al. (2010a), who proposed that the rock is a metamorphosed ultramafic cumulate that originally...to further discredit a possible LP origin of the rock. The main premise of the paper by Gazel et al. (2011)...used to infer high temperature solidification of the rock. However, if the scenario were true, REE abundances...different from Tschermakitic Cpx and almandine–grossular in the garnet– clinopyroxenite (Table 1 in Gazel...although they do not apply the thermometer to the rock from their own study. The garnet–spinel thermometer |  | | Journal (article/letter/editorial) | | approximately 10 kbar and temperatures of 650-900 ° C. Whole-rock Sr and Nd isotopic compositions correlate roughly...3 = San Francisco Peaks, 4 = Hopi Buttes, 5 = Chino Valley, ~5 = Geronimo Volcanic Field. 7 = San Carlos...magmas. Based on a suite of xenoliths from the Moses Rock minette dike (Navajo Field), McGetchin and Silver...assemblages (epidote + anorthite + apatite + sphene + grossular-almandine garnet) occur at Camp Creek but were...30 Ma), was at least partially composed of mafic rock types metamorphosed to the P, T conditions of upper |  | | Book (edition) | | quanz, from the Tourmaline Q ueen .1ine, Pala, San Diego County, California. From a pen-and-ink drawing by...gemological literature in North America. J. s. San Diego, California 1975 Acknowledgments The folio\\...Carolina 13 . Drawing of beryl crystal forms 14. San Pedro mine, Pala, California 15. Morganite crystal...Drawing of tourmaline crystal forms 38. Map of San Diego County, California gem sources 3 9. Stewart Lithia·...Olivine in basalt, San Carlos, Arizona 48. King turquois mine, Colorado 49. Amatrice mine, Utah 5 0. \'!"ariscite |  | | Journal (article/letter/editorial) | | alkali basalts provide the only natural samples of rock-types from the u p p e r mantle (30-200 km). Of...and related kyanite eclogites and grospydites (grossular-pyroxene-kyanite rocks), and there are no samples...the bottom of the ACF diagram with increasing grossular content of the coexisting garnet. It is CaEs (Ca-Eskola...coexists only with garnets that exceed about 35 mol% grossular and pyroxenes with considerable CaTs and CaEs...grospydites do not correspond to any known crustal rock type, being much too low in K and high in Na to |  | | Book (volume) | | Research of Washington, Laboratory Union The San Carlos International Geological Association of...spectacular basalt nodule localities at Kilbourne Hole, San Carlos and Chino Valley. These trips, in particular...are truly techniques that can be apThese latter rock types are Progress has also been made accidental...the SullivanButtesLatite, ChinoValley, Yavapai County, Arizona, Richard J. Arculus and DouglasSmith ...velocities of a garnet lherzolite from its whole rock oxide composition has been devised and suc- mantle |  | | Journal (issue) | | Range D. Vincent Manson and Carol M. Stockton 205 San Carlos Peridot John I. Koivula NOTES AND NEW TECHNIQUES...Natural History), Ed Wilson (of the Los Angeles County Museum of Natural History), and Wendell Wilson...mediocre. Lapis-lazuli is also found in San Bernardin0 County, California, but the original beds were...less impure. Rather than a single mineral, it is a rock-a mixture of minerals-that varies greatly in composition...n the m i n e dumps at Sar-e-Sang. leries. The rock is very hard; to break it up, early miners used |
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