 | Lloyd, F. E., Edgar, A. D., Forsyth, D. M., Barnett, R. L. (1991) The paragenesis of upper-mantle xenoliths from the Quaternary volcanics south-east of Gees, West Eifel, Germany. Mineralogical Magazine, 55 (378) 95-112 doi:10.1180/minmag.1991.055.378.08 | Journal (article/letter/editorial) | | Quaternary volcanics south-east of Gees, West Eifel, Germany F. E. LLOYD Department of Geoscience, University...olivine, pyroxene, upper mantle, Gees, West Eifel, Germany. Introduction TaE Quaternary West Eifel volcanic...Lloyd, 1972). Studies have concentrated on the Dreis Mineralogical Magazine, March 1991, Vol. 55, pp...95-112 (~ Copyright the Mineralogical Society (Dreiser Weiher) site (Frechen, 1973; Aoki and Kushiro, 1968;...Kushiro (1968) investigated clinopyroxenes from the Dreis xenoliths whereas Lloyd and Bailey (1975) and Becker |  | | Journal (article/letter/editorial) | | in a harzburgitic paragenesis with high Al-Ca enstatite or alternatively in a high-Al pigeonitebearing...those two areas will be stressed here. In France, Germany, and Iberian Peninsula, the xenoliths are brought...orthopyroxene is generally greenish brown (10 Y 6/2) enstatite (En9O_92), except in the French Massif Central...This texture presents two kinds of olivine and enstatite crystals: large and elongated strained grains...percent; Fig. IB). The grain size for olivine and enstatite is typically coarse (4 mm) but along with the |  | | Journal (article/letter/editorial) | | in a harzburgitic paragenesis with high Al-Ca enstatite or alternatively in a high-Al pigeonitebearing...those two areas will be stressed here. In France, Germany, and Iberian Peninsula, the xenoliths are brought...orthopyroxene is generally greenish brown (10 Y 6/2) enstatite (En9O_92), except in the French Massif Central...This texture presents two kinds of olivine and enstatite crystals: large and elongated strained grains...percent; Fig. IB). The grain size for olivine and enstatite is typically coarse (4 mm) but along with the |  | | Journal (article/letter/editorial) | | occurrence and have long been known, especially in Germany' Everywhere the nodules show a remarkable uniformity...Camargo, Mexico.. Ludlow, California. Dreiser Weiher, Eifel, Germany Kapfenstein, Austria. . Alaska.......Teslns 1 . Mineral Composition of Nodules from Dreiser Weiher. . . . . z - Mineral Composition of Nodules...results of chemical analyses of the olivine, enstatite, chromian diopside, and chromian spinel from that...represent materials from Kapfenstein, Austria; Dreiser Weiher, Germany; Peridot Cove,Arizona; and Salt Lake Crater |  | | Journal (article/letter/editorial) | | Studies on Ultramafic Inclusions from Dreiser Weiher, Eit~l, Germany D. K. PAUL Department of Earth Sciences...inclusions and two host basalts from Dreiser Weiher, Eifel, Germany are presented. Comparison of the sTSr/S6Srratios...the ultramafic inclusions from the Dreiser Weiher, Eifel, Germany where the inclusions have been shown...Environment and Petrography The Maar volcano of the Dreiser Weiher nnderwent several intermittent eruptions during...varying proportions of olivine, chrome diopside and enstatite with minor amounts of spinel. Olivine grains (Forsterite-90 |  | | Journal (article/letter/editorial) | | Geochemie, Zfilpicher StraBe 49, D-5000 K61n 1, West Germany Abstract. The partitioning of divalent (Co, Ni)...obtained from spinel peridotites from Dreiser Weiher/Eifel (West Germany). These rocks have formerly been...D-58 as well as Ia/419, Ia/423 and D8 are from Dreiser Weiher, samples Df-79, Df-107 and Df-121 from Meerfelder...Meerfelder Maar (both localities: Eifel/West Germany). Samples SC-K1 to SCKI1 come from San Carlos/Arizona...group'. Finally, from Meerfelder Maar/Eifel (West Germany) three nodules were selected (sampIes Df...) two |  | | Journal (article/letter/editorial) | | subcontinental lithospheric mantle beneath the Eifel (Germany) from pyroxenite and composite pyroxenite/peridotite...in the ash-tus of the Dreiser Weiher maar-type volcano (West Eifel, Germany) as discrete xenoliths or...UniversitaÈt, ZuÈlpicher Str. 49b, D-50674 KoÈln, Germany Tel.: 010 49 221 470 3710; Fax: 010 49 221 470...UniversitaÈt, WuÈllnerstr. 2, D-52056 Aachen, Germany Editorial responsibility: J. Hoefs 143 Nd/144Nd...provide evidence that: (1) melts parental to the Dreiser Weiher pyroxenites are genetically related to the |  | | Journal (article/letter/editorial) | | from the Massif Central, France, and the Dreiser Weiher, Germany. The petrography is described elsewhere...showed that K/Rb ratios increase from olivine to enstatite to diopside in some “alpine-type” ultramafic bodies...HUTCHISON(1968). DW or Be specimens from Dreiser Weiher, Germany. Bt specimens from Puy Beaunit, Puy-de-D&no...Die genese der olivinausscheidungen von Dreiser Weiher (Eifel) und Finken- Jahrb. Mineral 79A, |  | | Journal (article/letter/editorial) | | range of compositions defined by ordinary and enstatite chondrites, not carbonaceous chondrites. Spinel-bearing...Central, France Dreiser Weiher, Germany Dreiser Weiher, Germany Dreiser Weiher, Germany Kapfenstein, Austria...samples, xenoliths from the Dreiser Weiher locality, Rhein Graben, Germany; Montbriançon in the Massif...(fertile to depleted) from the Dreiser Weiher location, Westeifel, Germany, were previously studied by Stosch...of Cox et al. (1973) are rich in olivine and enstatite and contain very minor primary phlogopite (up |  | | Journal (article/letter/editorial) | | of two spine1 peridotite suites from Dreiser Weiher, West Germany H.-G. STOSCH and H. A. SECI< Minera...Ktiln. Ziilpicher StraDe 49, D 5000 K6ln 1. West Germany (Rrccvwd 19 Srprrnlher 1978; accepted irk re~ised~obrnt...Abstract-Among the spine1 peridotite nodules from Dreiser Weiher. West Germany which represent fragments of the earth’s...provides HZ0 and incompatible elements. At Dreiser Weiher this ‘open system’ upper mantle metasomatism...INTRODUCTION DREISERWEIHER in the Westeifel, West Germany, a late Quaternary maar-type volcano. is well known |  | | Journal (article/letter/editorial) | | Transzendentale Strafle 49, D-5000 Kdln l/West Germany January 5, 198 1: accepted Geochemie, Ziilpicher...minerals from spine1 peridotite xenoliths from West Germany, the southwestern U.S. and Mongolia decrease in...data was derived from nodules from Dreiser Weiher/Westeifel (West Germany) which have been described by Frechen...the lherzolites of this peridotite group from Dreiser Weiher have not been affected by partial melting events...binocular microscope. Fithe nodules fromDreiser Weiher. nally, the separates were washed in 2 n HCI for |  | | Journal (article/letter/editorial) | | Verteilung des Berylliums in den Mafititknollen des Dreiser Weihers (Eifel) P. K . I t 6 R M A ~ Minerelog...the ultramafic nodules from the Dreiser Weiher vulcano (Eifel, Germany) is investigated by means of 36...distribution curves between diopside ~nd olivine or enstatite and olivine are probably concave curves. I t is...a r e n die M a f i t i t - K n o l l e n des Dreiser W e i h e r s besonders geeigrmt. Sic w~ren p e...(F~EcHE~, 1948, Beryllium in den Mafititknollen des Dreiser Weihers 375 1963), u n d e s lagen yon allen |  | | Journal (article/letter/editorial) | | Nordbayern, Schlossgarten 5a, D-91054 Erlangen, Germany 2 Universität Köln, Institut für Geologie und Mineralogie...Mineralogie, Zülpicher Strasse 49a, 50674 Köln, Germany Abstract Traces of water in mantle minerals strongly...presents water contents for mantle olivine from Germany, Austria, Mongolia, and Nigeria and suggests a...from the Eifel, Germany (up to 21 ppm H2O), whereas the Fichtelgebirge xenoliths, Germany, reveal the lowest...xenoliths from Central Europe, specifically from Germany, and include further samples from other occurrences |  | | Journal (article/letter/editorial) | | University of Oregon, pers. comm. D = Dreiser Weiher, Germany; Aoki and Kushiro (1968). Analysis E-7...CaFe3+A1Si08 Ca-Tsch. CaA12SiO~ Wollas. Ca2Si206 Enstatite Mg2Si20e Ferros. Fe~+Si~Oe Cations on 6 oxygens...pleonaste-bearing clinopyroxenites from the Dreiser Weiher tuff-pipes in Germany, with augite compositions very similar...clinopyroxenes from ultramafic inclusions in Dreiser Weiher, Eifel. Contr. Mineral. Petrol. 18, 326-337... S. Jr. : Anorthite-forsterite and anorthite-enstatite reactions and their bearing on the basalt eclogite |  | | Journal (article/letter/editorial) | | peridotite xenoliths from Ataq, Yemen, from Eifel, Germany, and from Massif Central, France. Nitrogen and...remnant of a N isotopic composition found in enstatite chondrites (d15N = 30 to 40&). This interpretation...Ataq, Bir Ali (Yemen), (ii) Dreis Weiher, Meerfelder Maar (Eifel, Germany), and (iii) Le Fau (Massif Central... Yemen Ataq Bir-Ali Eifel Meerfelder Marr Dreis Weiher Massif Central Fau Name Rock type Mineral...et al., 1993, 2003). Peridotite xenoliths from Dreis Weiler (abbreviation DU in the sample name) and |  | | Journal (article/letter/editorial) | | from mantle peridotites of the Eifel (western Germany): An ion-microprobe study G. W i t t - E i c k...Universitiit KOln, Ziilpicher Strafie 49, D-50574 KOln, Germany bDepartment of Geology and Geophysics, University...West Eifel and 3 from the East Eifel (western Germany) forms the basis for the partitioning data presented...two alkalic basaltic maar-type volcanoes, the Dreiser Weiher and the Meerfelder Maar. These volcanic centers...compositional criteria they are categorized as the Dreiser Weiher group la of Stosch and Seck (1980). The xenoliths |  | | Journal (article/letter/editorial) | | eastern Africa, the Rhine Graben rift valley in West Germany, Lake Baikal in U.S.S.R. and Massif Central in...Kilbourne hole maar [20] in the Rio Grande Graben. Dreiser Weiher in the Rhine Graben, Auvergne in Massif Central...of varying proportions of olivine, aluruinous enstatite, aluminous chrome diopside and chromite-spinel... 4 shows such a re- 264 Fig. 2. Stretched enstatite porphyroclast in a plastically deformed lherzolite...note porphyroclast of spinel (white). Spinel and enstatite mark a lineation in the rock. Negative print. |  | | Journal (article/letter/editorial) | | is compositionally similar to the coexisting enstatite. The occurrence of two pyroxenes, olivine and...acid-washed high La/Yb = 10.6 pyroxenes reported from Dreiser Weiher and Vogelberg, F.R.G. (Jagoutz et al., 1979)...1979), but resemble nodule 3b reported from Dreiser Weiher (Jagoutz et al., 1979), which is characterised...patterns for diopsides from spinel lherzolites at Dreiser Weiher, although their data for refractory harzburgites...reflects the high modal abundance of olivine, enstatite and plagioclase. The low abundances of P, Ti and |  | | Journal (article/letter/editorial) | | found that three wehrlite nodules from Dreiser Weiher, Eifel, Germany had s7Sr/ssSr ratios similar to the...Some clinopyroxenes from &r&m&c inclusions in Dreiser Weiher, Eifel. Ccmtr&.Mid. Petrol. 18, 326-337. COOPERJ...studies on ultramafic inclusions from Dreiser Weiher, Eifel, Germany. Cm&i&. MineraL Petrol. $4, 22-28....texture and consist of varying amounts of olivine, enstatite, and chrome diopside as major constituents. Minor |  | | Journal (article/letter/editorial) | | nodules studied here consist mainly of forsterite, enstatite and chromian spinel associated with traces to...chromian spinel peridotite nodules from Dreiser Weiher, Germany (Hutchison et al., 1970; Kuno and Aoki...the other localities (Itinome-gata, Hawaii, Dreiser Weiher, Central Massif in France, and others). compositions |  | | Journal (article/letter/editorial) | | Meerfelder Maar; 3 = amphibole # l a 171 from Dreiser Weiher; 4, 5 = amphiboles from recrystallized peridotites...two different localities of the West Eifel (Dreiser Weiher and Meerfelder Maar) are distinctly lower,...sheared mantle xenoliths from the West Eifel, West Germany: evidence for mantle diapirism beneath the Rhenish...of two spinel peridotite suites from Dreiser Weiher, West Germany, Geochim. Cosmochim. Acta 44, 457-470...geochemistry of peridotite xenoliths from the Eifel (West Germany) and their bearing on the evolution of the subcontinental |  | | Journal (article/letter/editorial) | | intermediate pressure, as inferred from nodules of Dreis~r Weiher, Eifel (O'Hara 1965). In agreement with this...agreement with this view the ferrisalite from Dreiser Weiher coexists with plagioclase (Aoki & Kushiro 1968;...(as known from the Rosenberg megacrysts of North Germany (Vinx &. Jung 1977)) later filled by carbonate...clinopyroxenes from ultramafic inclusions in Dreiser Weiher, Eifel. Contrib. Mineral. Petrol. 18. 326-337...Maar-type volcanoes of Westeifel, Federal Republic of Germany. Contrib. Mineral. Petrol. 65, 45-52. Bence, A |  | | Journal (article/letter/editorial) | | Ernst-Mach-lnstitu~ A u s s e n s ~ , We8 am Rhein, Germany Received 13 October 1969 Shock wave compression...method. used were Holtex (Fa. Nitrochemie, Aschau, Germany) and Composition B, respectively. A steplike geometry...The locality of the olivine nodule is Dreiser Weiher, Eifel, Germany. The nodule consists of dominant olivine...10 moles per cent fayalite content), abundant enstatite, and minor chromediopside [22, 23]. Grain mounts...Frechen, Die Genese der Olivinausscheidungen vom Dreiser Weiher (Eifel) und Finkenberg (Siebengebirge), Neues |  | | Journal (article/letter/editorial) | | Aoki and Kushiro [8] for clinopyroxenites from Dreiser Weiher. 4. Sr isotopic results The Sr and Rb data... olivine from 2a Cerro Negro 1.2 - 2a-opx enstatite from 2a basalt basalt Cerro Negro Sr 87Sr/86Sr...STSr/S6Sr ratios of the olivine (0.7083) and enstatite (0.7084), and the bulk rock (0.7068). This value...clinopyroxenes from ultramafic inclusions in Dreiser Weiher, Eifel, Contr. Mineral. and Petrol. 18 (1968) |  | | Journal (article/letter/editorial) | | K61n 1, West Germany Abstract. Two suites of spinel peridotites of the Westeifel/West Germany were found...suites of peridotites from the Westeifel/West Germany. The existence of these two distinct suites of...orthopyroxenes of the Ia-suite. In the pure diopside - enstatite system the atomic fraction of Mg on the Ml-position...components. There is ample evidence that the enstatite limb is insensitive against Fe 2§ a n d preliminary...a x i m u m values for the composition of the enstatite limb at each isotherm. Temperatures for orthopyroxenes |
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