 | | Journal (article/letter/editorial) | | lithic-wackeinclusions within the Coyote Peak diatreme,Humboldt County, California GsRAro K. Cz,c,MANsKEAND SrevEN...Geological Suruey 345 Miilillefield Roail, Menlo Park, California 94025 Absfirct Lithic-wacke inclusions within...within the alkalic ultramafic diatreme at Coyote Peak record a remarkable history of metasomatismand crystal...assemblage,20 km SE of Orick, at Coyote Peak,Humboldt County, California. Rocks comprisingthe diatreme may...Consideringmineral assemblages, tine rock at Coyote Peak might bestbe termedmodlibovite (Scheumann,l9l3) |  | Oberti, Roberta, Boiocchi, Massimo, Hawthorne, Frank C., Ball, Neil A., Blass, Günter (2017) Ferri-obertiite from the Rothenberg quarry, Eifel volcanic complex, Germany: mineral data and crystal chemistry of a new amphibole end-member. Mineralogical Magazine, 81 (3) 641-651 doi:10.1180/minmag.2016.080.117 | Journal (article/letter/editorial) | | e. This latter sample is from Coyote Peak, Humboldt County, California, and was found in inclusions of...reflections No. observed reflections (I > 3 σI) θ range (°) Rmerge (%) Robs (%) Rall (%) green, a = 9.6872(11)...positions of 2268 reflections with I > 10 σI in the 2θ range 2–60o. The a:b:c ratio calculated from the unit-cell...kV, specimen current 10 nA, beam diameter 5 μm, peak count-time 20 s and background count time 10 s....has been, so far, observed solely in potassic-richterite from lamproites, and are associated with high |  | Hawthorne, F. C., Ball, N. A., Czamanske, G. K. (2010) Ferro-obertiite, NaNa2(Fe2+3Fe3+Ti)Si8O22O2, a new mineral species of the amphibole group from Coyote Peak, Humboldt County, California. The Canadian Mineralogist, 48 (2) 301-306 doi:10.3749/canmin.48.2.301 | Journal (article/letter/editorial) | | SPECIES OF THE AMPHIBOLE GROUP FROM COYOTE PEAK, HUMBOLDT COUNTY, CALIFORNIA Frank C. HAWTHORNE§ and Neil A...CZAMANSKE 750 West Greenwich Place, Palo Alto, California 94303, U.S.A. Abstract Ferro-obertiite, Na Na2...species of the amphibole group from Coyote Peak, Humboldt County, California, U.S.A., associated with inclusions...analysis, optical properties, Coyote Peak, Humboldt County, California, U.S.A. Sommaire Nous décrivons...groupe des amphiboles provenant de Coyote Peak, comté de Humboldt, en Californie, associée à des enclaves |  | Oberti, Roberta, Boiocchi, Massimo, Hawthorne, Frank C., Della Ventura, Giancarlo, Färber, Gunnar (2019) Potassic-jeanlouisite from Leucite Hill, Wyoming, USA, ideally K(NaCa)(Mg4Ti)Si8O22O2: the first species of oxo amphibole in the sodium–calcium subgroup. Mineralogical Magazine, 83 (4) 587-593 doi:10.1180/mgm.2019.38 | Journal (article/letter/editorial) | | Potassic-jeanlouisite from Leucite Hill (Wyoming, USA), ideally K(NaCa)(Mg4Ti)Si8O22O2: the first species...sodium-calcium group, and derives from potassic richterite via the coupled exchange CMg-1 WOH--2 CTi4+1...gravel quarry on Zirkle Mesa (Leucite Hills, Wyoming, USA). It occurs as pale yellow to colourless acicular...crystal-structure refinement; Leucite Hills; Wyoming; USA. 2 Oberti et al. Potassic-jeanlouisite Introduction...sodium-calcium subgroup and in particular to the richterite composition. As CTi is higher than 0.5 apfu, |  | | Journal (article/letter/editorial) | | wacke inclusions within the Coyote Peak diatreme, Humboldt County,California. American Mineralogist,70...Tertrahedrallycoordinated Ti in syntheticTi rich potassic richterite: evidence from XRD, FTIR and Raman studies. American...sodic calcic and sodic amphiboles from Coyote Peak, California. The Canadian Mineralogist, 36, 1253 1265 |  | | Journal (article/letter/editorial) | | calculation from wt% to apfu is made more complex by the range 45 of the A cations from complete occupancy to...Cl-, O2-. This variability results in a potential range 47 from 15 to 16 non-H cations, and from 46 to...that [4]Ti is only expected in certain 319 richterite-rich amphiboles (Oberti et al., 1992); authors...any calculated proportion of H2O+) is outside the range 98 to 102 weight percent; 387 x the totals for...export. As 420 AMPH2012 only accepts a certain range of elements, the exported data may only be a subset |  | Hawthorne, F. C., Della Ventura, G., Oberti, R., Robert, J.-L., Iezzi, G. (2005) Short-range order in minerals: amphiboles. The Canadian Mineralogist, 43 (6) 1895-1920 doi:10.2113/gscanmin.43.6.1895 | Journal (article/letter/editorial) | | Mineralogist Vol. 43, pp. 1895-1920 (2005) SHORT-RANGE ORDER IN MINERALS: AMPHIBOLES FRANK C. HAWTHORNE§...30, I-66100 Chieti Scalo, Italy ABSTRACT Short-range order involves local clusters of atoms that occur...(OH) group can be used as a local probe of short-range arrangements of atoms. Examination of natural amphiboles...fine structure that gives information on short-range arrangements. Moreover, the fine structure is sensitive...and next-nearest-neighbor arrangements. The short-range arrangements that can occur are constrained by the |  | | | | the amphiboles (Ti-potassian arfvedsonite vs. K-richterite– K-magnesioarfvedsonite–K-arfvedsonite solid...varieties occurring in the Leucite Hills (Wyoming, USA) or West Kimberley (Australia); nor are they an extension...KAT = titanian magnesiokatophorite KR= potassic richterite MgAF = potassic magnesio-arfvedsonite KAF = potassic...within a given coalfield can exhibit a very wide range of composition in terms of their Fe-Ti-Al contents...ranging in composition from potassic-titanium richterite through potassic-magnesio-arfvedsonite to titanian-potassic |  | | Journal (article/letter/editorial) | | Bratthagen nepheline syenite pegmatite (Vestfold County, Norway). With respect to the holotype found at...nepheline syenite pegmatite at Bratthagen, Vestfold County, Norway, an historical locality protected by law...10º00’39’’ E) in Lågendalen, Hedrum, Vestfold County, Norway. The locality has been protected by law...> 10s(I) in the 2y range 4 70º. Reflections with I > 3s(I) within the same 2y range were considered as...kV, specimen current 10 nA, beam diameter 5 mm, peak-count time 20 s and background-count time 10 s. |  | | Journal (article/letter/editorial) | | sodic to sodic-calcic amphiboles from Coyote Peak, California. However, stoichiometrically hydrogen-deficient...shifted toward lower frequency by ~15 cm–1 in richterite and ~20 cm–1 in pargasite (Robert et al. 1999...requirements exert stringent controls on short-range configurations in the amphibole structure. Based...technique. Hence, complete information on the short-range order of cations based on the band intensity is...with TiMgMg, Fe3+Fe3+Mg or Fe3+MgMg. Thus, short-range order of both cations and anions is extensive in |  | | Journal (article/letter/editorial) | | Konzett Phase relations and chemistry of Ti-rich K-richterite-bearing mantle assemblages: an experimental study...compositions to delimit the stability ®eld of K-richterite in a Ti-rich hydrous mantle assemblage, to assess...melts derived from the hydrous assemblage. K-richterite is stable in experiments from 0.5 to 8.0 GPa...additional phase. The upper T stability limit of K-richterite is 1200±1250 °C at 4.0 GPa and 1300±1400 °C at...at 8.0 GPa. In the presence of phlogopite, K-richterite shows a systematic increase in K with increasing |  | | Journal (article/letter/editorial) | | Museum of Natural History, New York, N.Y. 10024-5192, USA Abstract The crystal structures of magnesiosadanagaite...in crystal FS. Both amphiboles show SRO (short-range order) of species at the M(4), O(3), A(m) and A(2)...isotropic-displacement factors, there was an additional residual peak at another A(m) [= A(m)'] site in both structures...diameter of 1 mm. Counting times for all element peak and background determinations were 20 s and 10 s...function of the [4]Al content over the complete range of [4]Al values in amphiboles (Fig. 4a). At small |  | Tiepolo, Massimo, Zanetti, Alberto, Oberti, Roberta, Brumm, Richard, Foley, Stephen, Vannucci, Riccardo (2003) Trace-element partitioning between synthetic potassic-richterites and silicate melts, and contrasts with the partitioning behaviour of pargasites and kaersutites. European Journal of Mineralogy, 15 (2) 329-340 doi:10.1127/0935-1221/2003/0015-0329 | Journal (article/letter/editorial) | | data are used to discuss the role of potassic-richterite in its principal modes of occurrence, namely...trace elements, partition coefficients, potassic-richterite, experimental petrology, alkaline rocks. 1....Wagner et al., 1993). The occurrence of potassic-richterite in exotic rock types may suggest a far lower...(1970) have demonstrated the stability of potassic-richterite up to 3.5 GPa. The stability was subsequently...stability at deep mantle levels, so that potassic-richterite is likely to have a key role in magmatic processes |  | | Journal (article/letter/editorial) | | http://petrology.oxfordjournals.org/ at University of California, San Francisco on December 13, 2014 Geology...http://petrology.oxfordjournals.org/ at University of California, San Francisco on December 13, 2014 TABLE 1...the type alnoites of Alno (Sweden) grade into a range of melilite-free variants (Table 2). 'Ultramafic...http://petrology.oxfordjournals.org/ at University of California, San Francisco on December 13, 2014 Per cent...http://petrology.oxfordjournals.org/ at University of California, San Francisco on December 13, 2014 TABLE 2 |  | | Journal (article/letter/editorial) | | and wollastonite. Amphiboles in the fenites are richterite, katophorite, arfvedsonite and eckermannite....origin also. In no other complex has such a broad range of feldspathoidal rocks been considered to be metasomatic...ambiguous, with pyroxenite inclusions of a broad range of sizes frequently enclosed in ijolite or cut by...magnesioarfvedsonite; Fe-Rch, ferrorichterite; Reh, richterite mary standardization o f the instrument, well...(hereafter referred to as the eastern area fenites), richterite is the principal amphibole, whereas in the other |  | Hawthorne, F. C., Oberti, R., Cannillo, E., Ottolini, L., Roelofsen, J. N., Martin, R. F. (2001) Li-BEARING ARFVEDSONITIC AMPHIBOLES FROM THE STRANGE LAKE PERALKALINE GRANITE, QUEBEC. The Canadian Mineralogist, 39 (4) 1161-1170 doi:10.2113/gscanmin.39.4.1161 | Journal (article/letter/editorial) | | and at the M(1) site in strongly dehydrogenated richterite from lamproite, the ruling criterion being the...amphiboles examined here show a very restricted range of composition. They are essentially Mg-free and...sodic– calcic and sodic amphiboles from Coyote Peak, California. Can. Mineral. 36, 1253-1265. 1169 K...(1993): The behaviour of Mn in amphiboles: Mn in richterite. Eur. J. Mineral. 5, 43-51. ________, UNGARETTI...amphiboles. I. Four- and six-coordinate Ti in richterite. Eur. J. Mineral. 4, 425-439. ________, ________ |  | | Journal (article/letter/editorial) | | assigned to the A(m) site. We derived the short-range arrangements involving the M(4), O(3) and A sites...other complicated monoclinic amphiboles, short-range order is common and dictated by the valence-sum...crystal structure, Mössbauer spectroscopy, short-range order, Fiskenaesset, Greenland. Sommaire Nous avons...(Oberti et al. 2007), but our knowledge of short-range order lags far behind. Hawthorne et al. (1996a)...and A(2) sites occurs as a result of the short-range (local) bond-valence requirements of the structure |  | Kullerud, Kåre, Zozulya, Dmitry, Erambert, Muriel, Ravna, Erling J. K. (2014) Solid solution between potassic alkali amphiboles from the silica-rich Kvaløya lamproite, West Troms Basement Complex, northern Norway. European Journal of Mineralogy, 25 (6) 935-945 doi:10.1127/0935-1221/2013/0025-2340 | Journal (article/letter/editorial) | | poikilitic tetraferriphlogopite, (3) titanian potassic-richterite, (4) forsterite, (5) low-Al diopside, (6) Fe-rich...within some suites. Lamproites span a compositional range with 40–60 wt.% SiO2, 4–10 wt.% Al2O3, 1–5 wt.%...represented by titanian (0.25 , Ti , 0.5) potassic-richterite [K(Na,Ca)Mg5Si8O22(OH)2](see also Wagner & Velde...amphibole ranging in composition from potassic-richterite (core) to potassic-magnesio-arfvedsonite (rim)...current, focused beam (1 mm) and 10 s counting time on peak for major and 20 s or 30 s for minor elements (Cl |  | | Report (volume) | | bond-valence theory to predict patterns of SRO (Short-Range Order) in amphiboles, and use of these predictions...crystal chemistry, new compositions, long-range order, short-range order etc., and all experimental results...the type of amphibole (e.g., it is different in richterite than in pargasite-kaersutite), but the methods...2007b); hence cell dimensions show a restricted range. The P2/a structure occurs for just a single (known)...structure shows a wide range of composition and a correspondingly wide range of cell dimensions. The |  | | Journal (article/letter/editorial) | | in this pargasite, and indicate complete short-range disorder of OH and F. The occurrence of Al–Mg disorder...fifty automatically aligned reflections in the range 20 < 2 < 40°. Intensities were measured from 4...15 kV, specimen current: 20 nA, beam size: 5 m, peak count-time: 10 s, background count-time: 20 s. The...of Table 3, supporting our assignment of short-range-ordered configurations within the structure of this...metamorphism. Preliminary thermobarometric work on thermal peak assemblages from the Lake Harbour Group and Blandford |  | Oberti, Roberta, Caballero, José M., Ottolini, Luisa, López-Andrés, Sol, Herreros, Victor (2000) Sodic-ferripedrizite, a new monoclinic amphibole bridging the magnesium-iron-manganese-lithium and the sodium-calcium groups. American Mineralogist, 85 (3) 578-585 doi:10.2138/am-2000-0420 | Journal (article/letter/editorial) | | Sierra de Guadarrama gave fluid pressures in the range 150-170 MPa; this clearly represents an upper limit...excitation voltage of 15 kV, specimen current of 20 nA, peak-count time of 10 s and background-count time of...and of the corresponding antireflection in the range –30 < θ < 30°. For the two crystals of this work...monoclinic-equivalent pairs (hkl and hkl) in the range 2 < θ < 30°. Intensities were corrected for absorption...172.16 2.960 ally were found to be (A-filled) richterite on the basis of the charge-distribution pattern |  | Banno, Yasuyuki, Miyawaki, Ritsuro, Matsubara, Satoshi, Sato, Eriko, Nakai, Izumi, Matsuo, Gen-ichiro, Yamada, Shigeo (2009) Potassic-ferropargasite, a new member of the amphibole group, from Kabutoichiba, Mie Prefecture, central Japan. Journal of Mineralogical and Petrological Sciences, 104 (6) 374-382 doi:10.2465/jmps.090122 | Journal (article/letter/editorial) | | orthogneisses from the Adirondack Mountains of USA (Morrison, 1991), calc silicate pods in gneisses...despite the applicability of ferric estimation, the range of calculated permissible Fe3+/(total Fe) values...Other minerals Biotite has a narrow compositional range with Mg/(Mg + Fe2+) = 0.43 0.45 and Si = 2.74 2...shows oscillatory zoning, and its compositional range is Ab32 56An43 67Or0 1. Titanite contains up to...of Cl (1.0 2.9 wt%) extend their compositional range towards lower K than those with high Cl content |  | Oberti, Roberta, Vannucci, Riccardo, Zanetti, Alberto, Tiepolo, Massimo, Brumm, Richard C. (2000) A crystal chemical re-evaluation of amphibole/melt and amphibole/clinopyroxene DTivalues in petrogenetic studies. American Mineralogist, 85 (3) 407-419 doi:10.2138/am-2000-0402 | Journal (article/letter/editorial) | | titanian pargasite and kaersutite and of synthetic richterite (all crystallized under P, T, X, fO2 conditions...and kaersutite, but preferentially enter M1 in richterite. In the latter case, Ti segregates into the split...narrower (0.3–2.4 vs. 1.5–8.9) and more reasonable range of variation for amphibole/clinopyroxene DTi. A...terrestrial igneous rocks encompassing a very wide range of silica activities. Moreover, amphibole is capable...values of amphibole/clinopyroxene DTi show a large range of variation that cannot be explained on the basis |  | Cámara, F., Hawthorne, F. C., Ball, N. A., Bekenova, G., Stepanov, A. V., Kotel'nikov, P. E. (2010) Fluoroleakeite, NaNa2(Mg2Fe3+2Li)Si8O22F2, a new mineral of the amphibole group from the Verkhnee Espe deposit, Akjailyautas Mountains, Eastern Kazakhstan District, Kazakhstan: description and crystal structure. Mineralogical Magazine, 74 (3) 521-528 doi:10.1180/minmag.2010.074.3.521 | Journal (article/letter/editorial) | | in the northern part of the Tarbagatai mountain range, Eastern Kazakhstan (Sokolova et al., 2009a). The...kV, specimen current 10 nA, beam diameter 5 mm, peak-count time 20 s and background-count time 10 s....and refined cell dimensions are given in Table 3. Peak intensities reported in Table 3 are those estimated...reflections with I < 10s(I) collected in the 2y range 4 77º, Weighted full-matrix least-squares refine523...sites by Na is affected by the patterns of short-range order around the A site. In particular, where O(3) |  | | Book (volume) | | 01225 442836) Distributors USA AAPG Bookstore PO Box 979 Tulsa OK 74101-0979 USA (Orders: Tel. (918) 584-2555...Joesmithite Sodic-calcic Amphiboles Richterite—Ferro-richterite Barroisite—Ferro-barroisite Winchite—Ferro-winchite...analyses representative, wherever possible, of the range of chemical and paragenetic variation. From most...three new minerals from the Laytonville Quarry, California were named by S. O. Agrell after the three co-authors...The M4 sites however can be octupied by a wider range of cations and their sizes determine the way in |
|
Coyote Peak, Coastal Range, Humboldt County, California, USA