 | 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...clinopyroxene + phlogopite, and occur together with Group II clinopyroxenites + Ti-spinel + phlogopite in K-mafic...endiopside-diopside has resulted in the formation of wehrlite. Phlogopite is titaniferous and occurs as a trace mineral...opx-rich, Group I xenoliths, whereas substantial phlogopite vein-networks are confined to the opx-free sub-group...and as extensions of, the phlogopite networks. Clinopyroxenes in phlogopite-veined xenoliths are decreased |  | | Journal (article/letter/editorial) | | alkaline lavas of the West Eifel volcanic field, Germany Cliff S.J. Shaw b a,) , Jimena Eyzaguirre b...Geoinstitut, UniÕersitat ¨ Bayreuth, 95440 Bayreuth, Germany Department of Earth Sciences, UniÕersity of Western...pargasite and phlogopite are common in the lavas of the West Eifel volcanic field of Germany. Clinopyroxene...have been found at all seven localities studied; phlogopite and pargasite megacrysts are less common. Three...amphibole, phlogopite" clinopyroxene veins that cut peridotite and discrete amphibole–phlogopite clinopyroxenites |  | | Journal (article/letter/editorial) | | Clinopyroxenes from Ultramafic Inclusions in Dreiser Weiher, Eifel KEN-ICHIRO _A_OKIand IKUO I(USHI~O Institute...clinopyroxenes of crystal lapilli in tuff of Dreiser Weiher in Eifel, Germany, have been separated and chemically...lherzolite inclusions in basaltic rocks in I)reiser Weiher and other localities; the former has higher contents...These two types have also been found in tuff of Dreiser Weiher in Eifel ( F ~ E c ~ , 1948, 1963; Ross etal... 1963) considered all of the inclusions in Dreiser Weiher as crystal accumulates from alkali basalt magmas |  | | Journal (article/letter/editorial) | | Diatreme at the Rosenberg, North of Kassel ~orth Germany) R. Vinx and D. Jung Mineralogisch-Petrographisches...Grindelallee 48, D-2000 Hamburg 13, Federal Republic of Germany Abstract. The tuff and basanite of Rosenberg 20...levels within the ascending melt. Amphibole and phlogopite fractionation together caused an increased Na/K...basanite. The crystallization of amphibole and phlogopite is genetically interrelated with the violent...basanite of Rosenberg is a unique example in northern Germany. Megacrysts and polycrystalline aggregates are |  | | Journal (article/letter/editorial) | | Xenoliths from the West Eifel Volcanic Field, Germany 1 DEPARTMENT OF GEOLOGY, UNIVERSITY OF NEW BRUNSWICK...below the Quarternary West Eifel Volcanic Field, Germany. The first, during the Hercynian Orogeny, led to...secondary, Ti-poor amphibole, clinopyroxene and phlogopite. The signature of the second event, related to...field. At Dreiser Weiher and Meerfelder Maar, this event is characterized by amphibole–phlogopite–clinopyroxene...characterized by wehrlite xenoliths, many of which have phlogopite–clinopyroxene veins, that were transported by |  | | Journal (article/letter/editorial) | | Volcanoes of the Westeifel, Federal Republic of Germany Hans Jochem Becker* Mineralogisch-PetrographischesInstitut...Zfitpicherstr.49, D-5000 K61n 1, Federal Republic of Germany Abstract. The scoria cones of the Quarternary...maarvolcanoes of the Westeifel, Federal Republic of Germany, contain abundant ultramafic nodules, among which...which the lherzolites of the Dreiser Weiher are very well studied. This work deals with ultramafic nodules...titaniferous pargasitic amphibole, and titaniferous phlogopite. The nodules are interpreted as low pressure |  | | Journal (article/letter/editorial) | | Mont Briancon, Massif Central, France; Dreiser Weiher, Eifel, Germany) are all modally metasomatized, containing...containing amphibole f phlogopite. These suites are either from regions overlying Cenozoic continental...Chemical evidence suggests that phlogopite in xenoliths from Dreiser Weiher, Mont Briancon, and Ichinomegata...have suggested that the presence of secondary phlogopite is a strong indicator that carbonated melts have...Griffin, 1988; Meen et al., 1989a). However, phlogopite and highK amphibole can be stabilized in the |  | | 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) | | coexisting in rare cases with garnet or feldspar. Few phlogopite-bearing samples were found. In the spinel lherzolites...those two areas will be stressed here. In France, Germany, and Iberian Peninsula, the xenoliths are brought...pyrope-rich one (Py80). The brown (5 YR 5/6) phlogopite is uncommon and generally seems to have a magmatic...6A) represented by the well-known 'Dreiser Weiher' occurrence (Dreis, Eifel; Ernst, 1935; Colle"e, 1963)...samples of this type were studied in detail, one from Dreis and the other from Montpellier (France), but many |  | | Journal (article/letter/editorial) | | coexisting in rare cases with garnet or feldspar. Few phlogopite-bearing samples were found. In the spinel lherzolites...those two areas will be stressed here. In France, Germany, and Iberian Peninsula, the xenoliths are brought...pyrope-rich one (Py80). The brown (5 YR 5/6) phlogopite is uncommon and generally seems to have a magmatic...6A) represented by the well-known 'Dreiser Weiher' occurrence (Dreis, Eifel; Ernst, 1935; Colle"e, 1963)...samples of this type were studied in detail, one from Dreis and the other from Montpellier (France), but many |  | | Journal (article/letter/editorial) | | D/H (Kuroda et al. 1975) ratios in coexisting phlogopite--potassic richter~te from peridotite and r, ica...investigation deals mainly with the fluorine in phlogopite, pargasite, kaersutite, hornblende, potassic...r~ortheastern Japan (Aoki unpub.) and Dreiser Weiher, Germany (Aoki & Kushiro 1968); (3) pargasite in...an apatite-bearing clinopyroxenite xenolith, Dreiser Weiher, and the other is a rnegacryst in the Buell...occurrences of phlogopite were analyzed. One is a phlogopite-bearing wehrlite xenolith from Dreiser Weiher, Germany |  | | Journal (article/letter/editorial) | | peridotite xenoliths from Ataq, Yemen, from Eifel, Germany, and from Massif Central, France. Nitrogen and...xenoliths, with d15N values as low as 17.3& in phlogopite whereas clinopyroxene and olivine show positive...d15N values. Identical Sr isotopic ratios of phlogopite, clinopyroxene and whole rock in this wehrlite...reservoir, suggesting that the light N signature of phlogopite might be the result of isotopic fractionation...nitrogen concentration is systematically high in phlogopite, (7.6–25.7 ppm), whereas that of bulk peridotite |  | | 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) | | Postfach 102148 D-4630 Bochum, Federal Republic of Germany Abstract. Major and trace element analyses for...amounts of olivine, clinopyroxene, and minor phlogopite. Systematic compositional variations within volcanoes...fissures. The F-suite magmas probably formed in a phlogopite-bearing, CO2-rich, strongly metasomatized source...nodules from well-known localities such as Dreiser Weiher (Aoki and Kushiro 1968; Lloyd and Bailey 1975;...Ba for the rock-forming minerals leucite and phlogopite, which could fractionate Rb and Ba from each |  | | 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...followed b y eruptions of rocks consisting of phlogopite and hornbIende, and later b y tuff. The lherzolite |  | | Journal (article/letter/editorial) | | selected from a suit of xenoliths from Dreiser Weiher (DW), West Germany, have been studied for Nd and Sr isotopic...regions. 1. Introduction In the ash-tufts of Dreiser Weiher (DW), a young Pleistocene maar-type volcano...the hydrous minerals amphibole (Amph) and/or phlogopite (Phl). In most cases, Amph has broken down to...Ztilpicher Strasse 49, 5000 K61n, Federal Republic of Germany. tive mineral abundances, both suites cover a...TABLE 1 I Modal compositions (in wt.%) of Dreiser Weiher nodules O1 Opx Cpx Sp Amph Ib/8 Ib/K1 lb/3 |  | | Book (edition) | | Schwerpunkt liegt im Gebiet zwischen Hillesheim und Daun. Die geforderten Vulkanite gehören mit Ausnahme...oder weiß, was auf sehr eisenarme Glieder (also Phlogopite) schließen läßt. Aufgewachsene Biotit-Kristalle...Döhmberg, etwa 1.5 km NNE Betteldorf (am W-Rand des Dreiser Weihers): Schlakkenkegel mit Lavagang (Olivin-Leucit-Nephelinil);...Augit-Kristallc. Lit.: 119. (47) Dreiser Weiher, unmittelbar W Dreis: Trockenmaar; in der Umwallung mehrere...Titanit. Lit.: 119. (49) Radersberg. etwa 700 m E Brück: Schlackenkegel, am NE-Rand des Brücker Trokkenmaares |  | | Journal (article/letter/editorial) | | xenoliths from European volcanic provinces, Dreiser Weiher (Germany), Massif Central (France) and Kapfenstein... 170km Rhenish Massif N Pannonian Basin Dreiser Weiher Amorican Massif Kapfenstein 48° Rhein Massif...the three studied volcanic provinces, France, Germany and Austria Sample Regions Locality MC98-01...Coupet Beaunit Dreiser Weiher Dreiser Weiher Dreiser Weiher Dreiser Weiher Dreiser Weiher Geeser Maar Kapfenstein...xenoliths from Europe were sampled in Dreiser Weiher (Germany), Massif Central (France) and Kapfenstein |  | | Journal (article/letter/editorial) | | Postfach 3060, W-6500 Mainz, Federal Republic of Germany Universit/it zu K61n, Mineralogisch-PetrographischesInstitut...Ziilpicherstrasse49, W-5000 K61n 1, Federal Republic of Germany Received June 18, 1991/Accepted September 25, 1991...selected for this study were collected from the Dreiser Weiher diatreme (Stosch and Seck 1980). these samples...% (Table 1); this range is typical for the Dreiser Weiher xenolith suite (Stosch and Seck 1980). The...mineralogy for peridotite xenoliths from Dreiser Weiher, Germany SiO2 TiO2 AlzO3 Cr203 FeO MnO NiO MgO |  | | Journal (article/letter/editorial) | | adjacent to veins filled with hornblende and phlogopite are distinctly higher in TiO 2 ( > 1.5%) than...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,...are restricted to the rare cases that TiO2-rich phlogopite is present which on textural grounds is due to... 339 filled with TiO2-rich hornblendes and phlogopite. Amphiboles in these peridotites are typically |  | | Journal (article/letter/editorial) | | 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...and enstatite and contain very minor primary phlogopite (up to 1.3% (v/v)). Petrographic evidence for...elements. Cryptic or modal metasomatism, e.g., phlogopite in Nunivak island xenoliths or pargasite in Mtf37 |  | | Journal (article/letter/editorial) | | Kopf Volcanic Complex, West Eifel Volcanic Field, Germany. Cliff S. J. Shaw1,2,* Breagh S. Lebert1 Alan...precipitated olivine and clinopyroxene as well as phlogopite. Models of the equilibration of peridotite and...with alphaMELTS produce wehrlite with olivine, phlogopite and spinel compositions that are similar to those...contain secondary minerals such as amphibole, phlogopite and clinopyroxene. They also show evidence of...Shaw & Dingwell (2008). Discordant pyroxenite, phlogopite pyroxenite and amphibole pyroxenite veins, interpreted |  | | Journal (article/letter/editorial) | | from the Massif Central, France, and the Eifel, Germany. Smaller subsets of samples are from Spitsbergen...clinopyroxenes, orthopyroxenes, and olivine but also phlogopite and amphiboles, of a total of forty-two mantle...the Eifel. Samples of this study come from Dreiser Weiher, Geeser Maar, and Meerfelder Maar. Abbreviations...mineral separates from eight xenoliths from the Dreiser Weiher and the Meerfelder Maar have a mean 3He/aHe...K, U, and Th enrichment are not observed at Dreiser Weiher and Meerfelder Maar, despite indications for |  | | Journal (article/letter/editorial) | | clinopyroxene and plagioclase, sometimes with phlogopite in the more evolved samples. The fresh cores...An32, occur in the basalts and trachybasalts. Phlogopite phenocrysts occur in some of the more evolved...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 |  | | 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 |
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