 | | Journal (article/letter/editorial) | | recrystallization. The Mg/Fe ratios of both armalcolite types correlate positively with the Mg/Fe ratio...(Mg/Fe)rr-.'ra./(Mg/Fe)"rr"rn"-differs for the two armalcolite types (Kor"-n'- = O.29; Kr",-r,-o,^ = O.12),...percent Mgo) compared to ilmenite from ilmenite basalt (range 0.8-3.5, average l.g wt percent Mgo) reflecting...to be higher than in basaltic ilmenite. Both armalcolite types coexist with hieh-Mg silicates tMg/(Mg...relationship and the armalcolite --> ilmenite reaction in ilmenite basalts suggestthat armalcolite is a stable |  | | Journal (article/letter/editorial) | | Volume 60, pages 566-573, 1975 g Lamproites Armalcolite-Ti-Phlosopite-Diopside-Analcite-Bearin Montana...highly unusual of three major types:(l) sanidine,armalcolite,and alkali amphiboles mineral assemblages (potassiumrichterite...potassiumriebeckite);(II) armalcolite,Ti-phlogopite,diopside, olivine (altered),and sanidine;(III) armalcolite,Ti-phlogopite...type I-a fine grainedassociationof sanidine,armalcolite,and alkali amphiboles,with rocks. The Smoky Butte...extrusiverocks havebeenfound. The samplesstudiedarefrom a quarry on thesouth jumillite from Spain.The iron contentof |  | | Journal (article/letter/editorial) | | Netherlands [21 IDENTIFICATION AND SIGNIFICANCE O F ARMALCOLITE IN THE RIES GLASS AHMED EL GORESY and E.C.T....electron microprobe revealed the presence of armalcolite in impactite glasses of the Ries crater. This...terrestrial occurrence. In the Ries impactites, armalcolite occurs only in the glasses in two distinct assemblages:...rutile. Chemistry and textures of the coexisting armalcolite-ilmenite pairs are indicative oflowfo2 (10 -l...-l 1). Hence formation of the armalcolite in the Ries glass under reducing or nonoxidizing conditions |  | | Journal (article/letter/editorial) | | Mineralogist, Volume 80, pages810-822, 1995 Armalcolite in crustal paragneiss xenoliths, central Mexico...Michigan 48109, U.S.A. Ansrn-c,cr Aluminous armalcolite has been found in two sillimanite-bearing xenoliths...occurrenceof armalcolite is unusual in crustal paragneissesbecausemost terrestrial armalcolite occursin volcanic...suggestthat armalcolite is a late product formed by the reaction rutile + ilmenite"" : armalcolite., during...system MgO-FeO-FerO.-TiOr, which indicate that armalcolite is stable in the crust at 900-1200 oC, are consistent |  | | Report (issue) | | titano-magnetite ciinoeulite Cr-armalcolite Cr-Al-enstatite Cr-Ca-(NbZr)-armalcolite Cr-Zn hercynite Cu-rustenburgite...kimberlite pipe, Farm Dorst Fontein K 77, Kimberley district, Northern Cape Province (Parry and Wright, 1925)...in the Wessels mine, Farm Wessels 227, Hotazel district, Northern Cape Province (Von Bezing et al., 1991...kilometres southwest of Cnydas West, Gordonia district, Northern Cape Province and from Karelia, Russia...France (Grunhagen and Mergoil, 1963); Commercial Quarry, Crestmore, Riverside County, 6 Himmelleitenbruch |  | | Journal (article/letter/editorial) | | Springer-Verlag 1979 A Shale Buehite Xenolith With AI-Armalcolite and Native Iron in a Lava From Asuk, Disko, Central...native iron bearing buchite xenolith enclosed in basalt in a native iron bearing lava from Disko is similar...iron and graphite, while the immediately enclosing basalt does not, and demonstrates the indigenous reducing...recrystallized to aggregates of rutile and Al-armalcolite with up to 24 tool% AlzTiO 5. The Al-armalcolites...plagioclase, ilmenite, ferropseudobrookite-rich armalcolite, iron metal, troilite and acid glass, and crystallized |  | | Journal (article/letter/editorial) | | Press.Printed in Northern Ireland NOTE Exotic armalcolite and the origin of Apollo 11 ilmenite basalts...26 April 1971) Abstract-Armalcolite is probably partly exotic in lunar basalt 10022 as suggested by K...devitrified glass included within it. Assimilation of armalcolite (and possibly ilmenite) and addition of a K,O...NATURE AND ORIGIN OF GLASS IN ARMALCOLITE Apollo 11 ilmenite basalt 10022,37contains two large (0.3mm...3mm long) crystals of armalcolite [approx. (MgFe) T&O,)] (ANDERSON et al., 1970). They are surrounded |  | | Journal (article/letter/editorial) | | less than 1 wt.% to over 16%. Any high-Ti mare basalt or picritic glass petrogenetic model must include... Our results suggest that ilmenite–melt and armalcolite–melt HFSE, Cr, and V partition coefficients (DHFSE...that utilize the solubility of ilmenite and armalcolite in melt to effectively predict HFSE partition...lunar basalts can be produced by an ilmenite or armalcolite bearing hybridized mantle source, or by assimilation...Type 1 armalcolite from high TiO2 picritic glass melt, however, lunar Type 2 and 3 armalcolite have a |  | | Journal (article/letter/editorial) | | (1981) 77 : 307-324 9 Springcr-Vcrlag 1981 Armalcolite-Bearing F e - T i Oxide Assemblages in Graphite-Equilibrated...ilmenite, armalcolite and futile. The arrnalcolite is very similar to the lunar type 1 armalcolite of Haggerty...one isobaric invariant assemblage (ilmenite-armalcolite-rutile-iron) and the 3 boundary univariant reactions...of particular interest is the occurrence of armalcolite compositionally almost identical to that first...some unique reduced rocks carrying lunar4ype armalcolite and (2) O010-7999/81/0077/0307/$03.60 308 |  | | Journal (article/letter/editorial) | | coefficients for Zr and Nb have been determined between armalcolite, ilmenite, clinopyroxene, rutile, plagioclase...plagioclase and a coexisting synthetic high Ti mare basalt melt at lltSO, 1113' and 1128'C and at fO2 = IW x 10-o-5...fractionated ilmenite-rich cumulate. (3) KREEP basalt magmas may have formed as residual melts produced...the high Ti (low K) mare basalt suite and the high K Fra Mauro (KREEP) basalt suite, DUNCAN -et al. (1973...coefficients of Zr, Nb, Y, Hf, and Ta between ilmenite, armalcolite, spinel, rutile, pyroxenes, plagioclase and coexisting |  | | Journal (article/letter/editorial) | | titaniferous chromite, magnesian ilmenite and armalcolite in tholeiitic suites in the Karoo Igneous Province...of magnesian ilmenite (up to 6 wt% MgO) and armalcolite (up to 7 wt% MgO). These oxide mineral associations...1 wt% TiO2, ilmenite less than 3 wt% MgO and armalcolite is rarely a primary mineral. Experiments have...crystallization and composition of chromite, ilmenite and armalcolite. The results indicate that increasing the TiO2...increase the crystallization temperature of armalcolite and to decrease that of, ilmenite. The total |  | | Journal (article/letter/editorial) | | I I Cr-ulvdspinell * armalcolite* ilmenite Cr-ulvdspinel * ilmenite Armalcolite* ilmenite(Cr-ulvdspinel...reactionrelationoccurs.Slowercoolingenhances reactionof armalcolite with themelt andresultsin decreased modalabundance...respectively, above-10-13or below-10-14. Cr-ulvdspinel,armalcolite,and ilmeniteare enrichedin TiOz and CrrOsrelativeto...implications for the differentiationof high-Ti mare basalt magmas. In order to assessthe role of early opaque...crystallizationin the differentiationof lunar high-Ti mare basalt magmas, we have undertaken a detailed study of |  | | Journal (article/letter/editorial) | | function of cooling rate for two high-titanium basalt compositions. The results of this study of lunar...observed in pyroxene from isochemical suites of lunar basalt samples reflect variations in the cooling histories...been well documented for at least one terrestrial basalt composition [4]. These deviations from equilibrium...experimentally for low-Ca pyroxene in lunar quartz-normative basalt [5,6] and for augite in synthetic Luna 24 ferrobasalt...Meadowview Road, Greensboro, NC 27407, U.S.A. nium basalt compositions studied, the partitioning of major |  | | Book | | Chapter 5 Multiple Oxides: Zirconolite and Armalcolite, 122 Zirconolite, 122 Perovskite (Tentative)...(Tentative), 131 Unidentified Zr-Rich Phases, 131 Armalcolite, 132 Chapter 6 Carbonates and Phosphates 144 ...crystalline. It was unmistakably a medium-grained basalt, indicating that it had solidified from a magn1a... 3 4 INTRODUCTION Fig. 1- 3 Medium-grained basalt 10003, the first cleaned lunar rock to be observed...represent bedrock has been sampled (e.g., mare basalt from Hadley Rille). Photographically recorded, |  | Miller, C., Schuster, R., Klotzli, U., Frank, W., Purtscheller, F. (1999) Post-Collisional Potassic and Ultrapotassic Magmatism in SW Tibet: Geochemical and Sr-Nd-Pb-O Isotopic Constraints for Mantle Source Characteristics and Petrogenesis. Journal of Petrology, 40 (9) 1399-1424 doi:10.1093/petroj/40.9.1399 | Journal (article/letter/editorial) | | A-6020 INNSBRUCK, AUSTRIA 2 INSTITUT FÜR GEOLOGIE, ALTHANSTRASSE, A-1090 WIEN, AUSTRIA RECEIVED AUGUST...contain mantle xenocrysts (olivine ± rutile/armalcolite). Their initial 87Sr/86Sr (0·7172–0·7220) and...alkali-feldspar; Amp, amphibole; Ap, apatite; Arm, armalcolite; Bio, biotite; Cpx, clinopyroxene; Grt, garnet;...includes corroded macrocrysts of rutile mantled by armalcolite or intergrown with magnesian ilmenite. Low-Ti...the few single crystals of rutile mantled by armalcolite and the sigmoidal rutile–magnesian (9–11 wt % |  | Blank, H., El Goresy, A., Janicke, J., Nobiling, R., Traxel, K. (1984) Partitioning of Zr and Nb between coexisting opaque phases in lunar rocks—determined by quantitative proton microprobe analysis. Earth and Planetary Science Letters, 68 (1) 19-33 doi:10.1016/0012-821x(84)90137-7 | Journal (article/letter/editorial) | | opaque phases in lunar rocks. Zr contents in armalcolite and coexisting ilmenite in Apollo 17 rocks were...basalts where ilmenite was formed by reaction of armalcolite with the basaltic liquid or with Fe°: (b) in...melt either simultaneously with armalcolite or after it. In armalcolite- and ilmenite-bearing assemblages...assemblages Zr partitions in favor of armalcolite in (a); in favor of ilmenite in (b). These results can be understood...equilibration between armalcolite and ilmenite in (a) due to the reactions involving armalcolite. The reverse |  | | Journal (article/letter/editorial) | | analysis is a powerful tool in the investigation of basalt crystallization. We present the first comprehensive...plagioclase, olivine and armalcolite were determined for 18 high-Ti mare basalt samples from the Apollo...a result, Ti-rich minerals (i.e., ilmenite, armalcolite, and Ti-spinel) play a more pronounced role in...whole-rock chemistry, but is soon replaced by armalcolite and ilmenite (Papike et al., 1976). In particular...are: Type 1A quenched olivine-porphyritic ilmenite basalt (Fig. 1a); Type 1B slower-cooled, olivine-poor |  | | Journal (article/letter/editorial) | | contamination by crustal materials. Three types of high-Ti basalt (A, B, and C) were recognized in the Apollo 17...near-surface crystallization, requiring that these basalt types were derived from distinct source regions...investigations had each suggested the presence of three basalt types (PAPIKE et al., f974; BROWNet al., 1975;...ohvine-rich; Type 1B = p~agi~&~ase-~iki~it~cilmenite basalt, coarse-grained (siower cooling) and olivine-poor;...olivine-poor; Type II = Apollo I I, low-K-type basalt (olivine-free). In our suite of 26 “new” Apollo 17 basalts |  | | Journal (article/letter/editorial) | | in USA A distinct variant of high-titanium mare basalt from the Van Serg core, Apollo 17 landing site...revised farm 2 Apri/1990) Abstract-A fragment of basalt picked from the drive tube collected at Van Serg...primitive than that of other high-titanium mare basalt groups collected at the site. The sample has a...that is distinct from that of other high-titanium basalt samples. The grain size and texture suggest that...closed-system igneous processes to any of the other mare basalt groups identified among Apollo 17 samples. Its |  | | Journal (article/letter/editorial) | | Trace element partitioning between ilmenite, armalcolite and anhydrous silicate melt: Implications for...range of trace elements between ilmenite (Ilm), armalcolite (Arm) and anhydrous lunar silicate melt, to constrain...CaO–FeO–MgO–Al2O3–TiO2–SiO2 system. Ilmenite–melt and armalcolite–melt partition coefficients (D) show highly incompatible...0023 to DArm–melt 0.041 ± 0.008 for La Lu La Lu armalcolite). D values for the high field strength elements...0.0015 and DIlm–melt 0.039 ± 0.005, and for armalcolite DArm–melt Th U W Th Arm–melt Arm–melt 0.008 ± |  | | Journal (article/letter/editorial) | | Synthetic armalcolite and pseudobrookite A. YA. MEOVEDEV Institute of Geochemistry, PB. 4019, 664033...664033 Irkutsk, Russia Abstract Armalcolite and pseudobrookite have been crystallized from synthetic melts...TiO2. It was found that the composition of the armalcolite and pseudobrookite are dependent on the TiO2...exsolved at higher A1203 concentrations. Generally armalcolite is formed at low pO2 and pseudobrookite at higher...higher oxygen fugacities. KEvworms: armalcolite, pseudobrookite, synthetic melts. Introduction THE MgO-FeO-FezO3-TiO2 |  | | Journal (article/letter/editorial) | | xenoliths mix only to a limited extent with the basalt melt, and form granophyre bands that give lavas...(sekaninaite), ultra-ferriferous hercynite, (Al, Zr) Fe-armalcolite, Zr-ilmenite, mullite, sillimanite, high-lanthanum...selectively molten pelitic xenoliths. The Shufan basalt plateau is located in southern Primorskii krai...however, they can be found within the entire area of basalt distribution in the form of local outliers, emphasizing...xenoliths mix only to a limited extent with the basalt melt, forming thin (and consistent with the flow |  | | Journal (article/letter/editorial) | | and major element partitioning of ilmenite and armalcolite during lunar cumulate mantle overturn Carla Thacker...petrogenesis of lunar high-Ti picritic magmas, and armalcolite is another highTi oxide that was first discovered...the thermodynamic stability of ilmenite and armalcolite in the context of lunar cumulate mantle overturn...stable at pressures greater than 1.4 GPa, and armalcolite is stable at lower pressures. Solidi for both... and the phase boundary between ilmeniteand armalcolite-bearing harzburgite was shown to have little |  | Walker, David, Longhi, John, Stolper, Edward M., Grove, Timothy L., Hays, James F. (1975) Origin of titaniferous lunar basalts. Geochimica et Cosmochimica Acta, 39 (9) 1219-1235 doi:10.1016/0016-7037(75)90129-5 | Journal (article/letter/editorial) | | with olivine, pyroxene, plugioclase, and/or armalcolite at the liquidus (BIGGAR et al.. 1971; O’HARA...or intersertal group had olivine, pyroxene or armalcolite as a liquidus phase, but plagioclase appeared...the high-Ti suite. \ J To-SO2 .a0 10- ARMALCOLITE oFMO n’ -to- l .v . . . + :m- !_& . lb...confirming the applicability of these diagrams to lunar basalt compositions are presented in the Appendix. Detailed...(1974, Table 2). The short-dash line between armalcolite and ilmenite indicates the position of this reaction |  | | Book (volume) | | Characteristics of Lunar Basalts and Related Rocks KREEP Basalt: A possible partial melt from the lunar interior... 505 Contents, Volume 1 The stability of armalcolite: Experimental studies in the system MgO-Fe-Ti-O...liquid line of descent and liquid immiscibility for basalt 70017 M. J. RUTHERFORD, P. C. HESS, and G. H. DANIEL...pyroxenes: Implications to depth of origin of mare basalt magma C.-M. SUNG, R. M. ABU-EID, and R. G. BURNS...distribution and equilibrium temperature of pigeonite from basalt 15065 T. YAJIMA and S. S. HAFNER 769 The Composition |
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