 | | Journal (article/letter/editorial) | | garnet-pyroxenite xenolith from the diatreme at Moses Rock, Utah, document storage and transport of water and...in that xenolith, an assemblage of chlorite + enstatite + diopside + ilmenite + titanian chondrodite is...diopside + ilmenite + pyrite. Euhedral grains of enstatite (0.02% A1203, 0.05% C a O ) + diopside record...pyroxenes was caused by growth in chlorite-dominated rock. Derivation from garnet lherzolite is established...contacts between garnet peridotite and other mantle rock in response to fluid flow. Pressures _> 2.2 GPa |  | | Journal (article/letter/editorial) | | Geological Sciences, University of Texas, Austm, Texas USA Received September 25, 1975 Peridotite inclusions...flows of minette, a biotite-pyroxene-alkali feldspar rock, are c o m m o n near the pair o f diatremes and...studied systematically at only one diatreme, Moses Rock [2,10]. The inclusion suite at Green Knob is...is distinctly different from that at Moses Rock; in particular, spinel peridotite is more c o m m o n at...(;R = (;:~rnct Ridge; CV :~ Cane Valley; MR = Moses Rock; MI- = Mule Ear. Solid dots are generalized minette |  | | Journal (article/letter/editorial) | | Sciences, University of Texas, Austin, Texas 78712, USA Abstract. Crystal fragments of pyrope from diatremes...northeastern Arizona and 37~ 109~ in southeastern Utah, respectively. The Garnet Ridge cluster, a group...microbreccias, which are mixes of comminuted crustal rock and mineral fragments, anhedral fragments of largely...The microbreccias, like those described at the Moses Rock, Buell Park, and Green Knobs diatremes of the...Colorado 81224, USA 0010-7999/81/0076/0312/$01.80 313 of ultramafic microbreccias from Moses Rock (McGetchin |  | | Journal (article/letter/editorial) | | KIMBERLITE AND RELATED ROCKS IN THE MOSES ROCK DIKE, SAN JUAN COUNTY, UTAHI Tnorr.qs R. McGrrcyrN, Department...asadena,Cal'iJornia9 1109 7'echnolo Alsrnacr The Moses Rock dike, a u'ell-exposed,kimberlite-bearing breccia...Permian Cutler Formation, in eastern Monument Valley, Utah. Petrographic, bulk chemical, and electron microprobe...grains in kimberlite are unlike associated dense rock fragments, except rare therzolite: (2) kimberlite...site for volatiles in the upper mantle: (6) dense rock fragments (except lherzolite) are unrelated to the |  | | Journal (article/letter/editorial) | | Upper Mantle in the Buell Park Kimberlite, Arizona, USA Ken-ichiro Aoki 1, Kiyoshi Fujino 2 and Masaki...Ruslovaya pipe in Yakutia, Siberia [7, 8] and Moses Rock dike, Utah [9, 10], titanochondrodite in kimberlite...Plateau in northeastern Arizona and in areas adjoining Utah and New Mexico. The geology and petrography of these...and subordinate to rare amounts of forsterite, enstatite, pyrope, diopside, ilmenite, chromite, apatite...titanoclinohumite from kimberlite at the Moses Rock dike, Utah, 140 km NNW of the Buell Park occurrence |  | | Journal (article/letter/editorial) | | mantle which was warm but still below sillicate-rock melting temperatures. 2. Pyropes and inclusions...temperature and pressure are based on the diopside-enstatite solvus [ 11] and the solubility of pyrope in pyroxene...equilibration at about 850°C (taken from the diopside-enstatite solvus) and 16 kb or about 48 km. This assumes...emplacement of a kimberlite-bearing breccia dike, San Juan County,Utah, Ph.D. Thesis, Calif. Inst. Tech. (1968)...kimberlite and related rocks in the Moses Rock dike, San Juan County, Utah, Amer. Mineral 55 (1970) 1738. |  | | Journal (article/letter/editorial) | | AJ-20, University of Washington, Seattle, WA 98195, USA Abstract. Petrographic cvidence is prcsentcd for...known for m a n y decades as a vein and accessory rock-forming mineral in antigorite serpentinites of the...tremolite, talc, anthophyllite, cummingtonite, and enstatite ( T r o m m s d o r f f and Evans 1972). Although...as a fragment in the kimberlitic diatreme of Moses Rock on the Colorado Plateau. This mode of occurrence...Park (Allen and Balk 1954; Aoki et al. 1976), Moses Rock (McGetchin and Silver 1970), and Green Knobs |  | | Journal (article/letter/editorial) | | DIATREME, A KIMBERLITE PIPE IN NORTHERN LARIMER COUNTY, COLORADO M. E. McCerwwr, ColoradoState Unittersity...sourceof building materials, soil additives, and rock collectors' curios. The pipe penetrates granite...vertical joints. v i. ETROGRAPIIY Serpentirrized rock in the Sloan diatreme is very similar to ultramafic...1954; Shoemaker el ol., tr962; Watson, K. D., 1967), Utah (McGetchin and Silver, 1970), Kansas (Byrne el a1...kimberlite is a light- to dark-green or gray-green rock that typically is decomposed at the surface. The |  | Laughlin, A.W., Aldrich, M.J., Shafiqullah, M., Husler, J. (1986) Tectonic implications of the age, composition, and orientation of lamprophyre dikes, Navajo volcanic field, Arizona. Earth and Planetary Science Letters, 76 (3) 361-374 doi:10.1016/0012-821x(86)90087-7 | Journal (article/letter/editorial) | | reported that minettes are the dominant igneous rock of the field, he also described monchiquites, vogesites...these rocks. N o work has been reported on the rarer rock types. We have recently sampled 10 dikes of the...Keyah oil field (Fig. 1) were also dated. Whole-rock major and trace element analyses were obtained on...the states of Arizona, New Mexico, Colorado, and Utah meet at a common point. The field is largely in...Mule Ear, 2 = Moses Rock, 3 = Garnet Ridge, 4 : Buell Park, 5 = Shiprock, 6 = Mitten Rock, 7 = The Beast |  | | Journal (article/letter/editorial) | | inclusions in pyrope crystals from Garnet Ridge, Arizona, USA: implications for processes in the upper mantle ...inclusions of peridotitic origin, such as olivine, enstatite and diopside. The Ti-rich oxide minerals may constitute...Sciences, University of Michigan, Ann Arbor, MI 48109, USA; Fax: 734-763-4690; E-mail: liping@umich.edu Editorial...inclusions, including large olivine, diopside, enstatite or spinel grains that are usually surrounded by...between large inclusions of olivine, diopside or enstatite and their pyrope hosts (Fig. 1h). V. Inclusions |  | | 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...larger grains of olivine, garnet, chrome-diopside, enstatite, titanoclinohumite, chlorite and apatite, but |  | | Report (issue) | | CALITI ES OF UTAH by Kenneth C. Bullock UTAH GEOLOGICAL AND MINERAL SURVEY a division of the UTAH DEPARTMENT...JANUARY 1981 MINERALS AND MINERAL LOCALITIES OF UTAH by Kenneth C. Bullock Nature displays her most...State of Utah. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 County Listings.... . . . . . . 1 Chapter II. Mining Districts of Utah . . . . . . . . . . . . . . . . . . . . . . . ..... . . . . . . . 4 Mineral Localities Listed by County . . . . . . . . . . . . . . . . . . . . . . . |  | | Journal (article/letter/editorial) | | Sciences, University of Texas, Austin, TX 78713, USA Abstract. Mineral associations and compositions...for analysis include olivine P140, synthetic enstatite, and natural dolomite (Mg), NBS glass K412 (Si)...cooling; Mg-chlorite will form at the expense of enstatite plus forsterite plus spinel in the presence of...hydrothermal systems and experimental hot-water/rock interactions. Geochim Cosmoclaim Acta 28:1323-1357...kimberlite and related rocks in the Moses Rock dike, San Juan County, Utah. Am Mineral 55:1738-1771 McGetchin |  | | 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 |  | | Journal (article/letter/editorial) | | subsequent independent depth information from that rock body (Bozhilov et al. 1999) and others (e.g., van...consisted of natural mineral powders [66 vol% olivine (San Carlos), 8 vol% each of Cpx, Opx, and Grt (all from...comparison with a control grain of olivine from San Carlos, AZ, previously analyzed by WDS microanalysis...size for analysis and line scans was about 4 nm. San Carlos olivine was used as standard to determine...below) to be the result of incipient reaction to enstatite and Ti-Cl/Ti-Ch. TEM bright-field images show |  | | Journal (article/letter/editorial) | | rutile-diamond intergrowths were observed, garnet-pyroxene rock (Sobolev and Shatsky, 1990), and coesite-bearing...titanite (Tn) of the LIMA series, pyrope (Py) and enstatite (En) from the Sputnik pipe (Yakutia) diamond,...electron image (C); polymineralic inclusion of enstatite, rutile, and olivine from the Mir pipe diamond...gneisses (5), and from garnet-pyroxene diamondiferous rock, Kokchetav massif, northern Kazakhstan (6). All...chemistry; and Cr in rutile correlates only with bulk-rock chemistry. Unusual ilmenite and, especially, corundum |  | | Journal (article/letter/editorial) | | 1965; NIxoN et al., 1964; KUSHIRoet al., 1972) and Utah, U.S.A. (MCGETCHIN and SILVER,1970). __-1.0 0 ... Japan (ARAMAKI and KATSURA, 1973). b) Plutonic rock: Skaergaard intrusion (BROWN, 1957) and Bushveld...[OMicrophenoc yst NGroundmass 00 0 o 00 00 0 0 Plutonic rock 00 0 0101010101 F0 101 . rot 101. . 0 Bushveld...pyroxenes show diverse chemical compositions even in a rock specimen, KD' values are calculated after obtaining...garnet-bearing intrusive peridotites and 1.8 for other rock types. For the pyroxene pairs from intrusive peridotites |  | | 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 (article/letter/editorial) | | gradientsof AIrO, (0.980.85 wto/o)over *500 pm in one rock and of Cr in two; a Cr gradient in one gamet is...of the Navajo field on the Colorado Plateau; enstatite and diopside are included in some of the pyrope...peridotite xenoliths from southernAfrica were selected. Rock J34 is a harzburgite from the varied suite of inclusions...1989;Harte and Gurney, 1982;Winterburn et al., 1990). The rock is one of three low-temperature Jagersfontein xenoliths...they documented that garnet in the rock appeared homogeneous. The rock contains amphibole like that described |  | | Journal (article/letter/editorial) | | h a t c h a r a c t e r i z e i t h e r t h e enstatite-diopsidejoin or the Al-concentration in pyroxenescoexistingwith...the diatremes in the Navajo Indian Reservation (Utah-Arizona) and ophiolites from Newfoundland are discussedhere...(recrystallizedtectonites). In experiments, the enstatite/diopsidejoin, at least,seemsinsensitive to the...t i n g f o r t h e ity in either diopside or enstatite for either facies n o t b e o b t a i n e d since...subscripts d and e refer respectively to diopside and enstatite, and where K",, and K",, are correction factors |  | | Journal (article/letter/editorial) | | Geology, UniÕersity of Georgia, Athens, GA 30602, USA Department of Geology and Geophysics, Woods Hole...Hole Oceanographic Institute, Woods Hole, MA 02543, USA Received 8 March 1999; accepted 13 August 1999 Abstract...Proterozoic crust of the Colorado Plateau, southwestern USA, was intruded in the mid-Tertiary by hypabyssal minettes...al., 1987. is to understand the distribution of rock types in an example of Proterozoic mantle lithosphere...porphyroclastic textures. There is no correlation of rock type Žlherzolite vs. harzburgite. with texture but |  | Rezvukhin, Dmitriy I., Nikolenko, Evgeny I., Sharygin, Igor S., Rezvukhina, Olga V., Chervyakovskaya, Maria V., Korsakov, Andrey V. (2022) Cr-pyrope xenocrysts with oxide mineral inclusions from the Chompolo lamprophyres (Aldan shield): Insights into mantle processes beneath the southeastern Siberian craton. Mineralogical Magazine, 86 (1) 60-77 doi:10.1180/mgm.2021.89 | Journal (article/letter/editorial) | | Australia (Jaques et al., 1984) and Prairie Creek, USA (Smith and Skinner, 1984). The subcontinental lithospheric...xenocrysts ofupper mantle origin ( pyrope, diopside, enstatite, chromium spine), phlogopite and Mg-rich ilmenite)...al., 2019 and references therein). The Chompolo rock occurrences are probably related to the extensive...Cr-diopside predominate, and only two grains of enstatite used for mineral identification. were found: (1)...acteristic composite aggregates with silicates (enstatite), hydrous siliof the resulting crater was ~50 |  | | Journal (article/letter/editorial) | | Sciences, Princeton University, Princeton, NJ 08544, USA Abstract. Petrographic, fluid inclusion, geochemical...stability 59 curve defined by the reaction enstatite dolomite 4MgSiO 3 +CaMg(CO3) 2 ~ orthopyroxene...in the atmosphere, hydrosphere and in sedimentary rock reservoirs (e.g., see Walker 1977; Anderson 1975;...nodules from the Lunar Crater Volcanic Field, Nevada, USA. Ph D Dissertation, Princeton University Best MA...(1975) Sheared lherzolites: From the point of view of rock mechanics. Geology 3:172-173 Goldstein S (1938) |  | | Journal (article/letter/editorial) | | temperature estimates for Pipe 200 ultramafic xenoliths Rock type Pyroxene solvus T ~ C Wells (1977) P kb W o...(1978) 1,085 . 996 - . . - . 1,037 1,109 - Rock types CL = chromite lherzolite; G C L = garnet chromite...Na, Cr, Fe and Ca profoundly effect the garnet-enstatite equilibria. These 'contaminating' elements in...'extensive chemical equilibration with the host rock silicates was attained' (Harte and Gurney 1975,...McGetchin's (1968) estimated of 20 60 m/s for the Moses Rock dike. McGetchin's model neglects lateral dike |  | | Journal (article/letter/editorial) | | Institute of Technology, Cambridge, Massachusetts 02139, USA Abstract. Trace element evidence indicates that...most likely a mixture of comminuted mantle wall rock and crustal material; there is no evidence for an...the Washington Pass, Sonsela Buttes, and Mitten Rock centers, the felsic minettes were in part differentiates...than the mafic minettes based on studies of whole rock and phenocryst compositions of minettes from the...Ni, Sc) to incompatible (Ba, La, Rb) to determine rock interrelationships. In addition to the minettes |
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