 | | Journal (article/letter/editorial) | | (1994) presented a model for the formation of chlorapatite and fluorapatite in layered intrusions that...intercumulus apatite present, whether fluorapatite or chlorapatite, is usually a function of the amount of other...apatite becomes a cumulus mineral in the Skaergaard intrusion. Accompanying this change from an intercumulus...relatively F-rich apatite to near endmember chlorapatite compositions (with apatite cont/fining in excess...This is not observed. For example, in the Skaergaard intrusion, apatite in the most fractionated rocks |  | Schisa, Paul, Boudreau, Alan, Djon, Lionnel, Tchalikian, Arnaud, Corkery, John (2015) The Lac Des Iles Palladium Deposit, Ontario, Canada. Part II. Halogen variations in apatite. Mineralium Deposita, 50 (3) 339-355 doi:10.1007/s00126-014-0541-4 | Journal (article/letter/editorial) | | Abstract Analysis of apatite from the Mine Block Intrusion (MBI) of the Lac des Iles Igneous Complex shows...from the Pd-sulfide zone contain up to 57 mol% chlorapatite endmember with significant hydroxyapatite component...(amphibolite and greenschist assemblages) the chlorapatite component is typically less than 10 mol% with...P7B 2R2, Canada Introduction The Mine Block Intrusion (MBI) of the Lac des Iles Igneous Complex (LDIC)...rocks (Somarin et al. 2009) of the Mine Block Intrusion, there has been no previous work on the halogen |  | | Journal (article/letter/editorial) | | over 90% near the top of the gabbroic zone. The chlorapatite component decreases from a high of 20-30 mol%...The Radio Hill Complex is a small (2 X 2 km) intrusion which consists of a lower 330 m thick ultramafic...Complex is another small (3 X 6 km) mafic-dominated intrusion with an exposed thickness of 1 to 2 km that is... Chemical compositions of apatite in a layered intrusion Apatite is the only phosphate mineral observed...recrystallized apatite characterized by a decrease in the chlorapatite component and an increase in the hydroxyapatite |  | | Journal (article/letter/editorial) | | near the top of the exposed Mafic Sequence. The chlorapatite component decreases from a typical high of 10—20...brief, the Great Dyke is an early Proterozoic intrusion (2.47 Ga.), 520 km long and up to 11 km wide,...the intrusion whereas W98 was drilled approximately 1 km from the eastern margin of the intrusion. Cumulus...become more abundant toward the margins of the intrusion, but are not specifically related to sulfide formation...alteration which is most intense at the margins of the intrusion. Prior to this study, we had analyses of apatite |  | | Journal (volume) | | mafic main magma. Unusual minerals (loveringite, chlorapatite. zircon, zirconolite, baddeleyite, thorite,...intercumulus of the ultramafic cumulates; ilmenite, chlorapatite and zirconolite occur as daughter and occluded...magma inclusions in olivines and orthopyroxene. Chlorapatite, ilmenite and loveringite are the most common... The Keivitsa intrusion (age 2057 Ma) is located south of the Koitelainen intrusion. Isotopic (Sm-Nd...is located far above the basal contact of the intrusion. Other contaminants acquired from surrounding |  | | Book | | Complex 2.4.2 The Stillwater Complex 2.4.3 Skaergaard Intrusion 10 10 11 15 15 17 17 19 19 19 24 31 3...Examples of Isotopic Variability 13.2.1 The Skaergaard Intrusion 13.2.2 Bushveld Complex 13.2.2.1 Bushveld...this book are from the Stillwater, Bushveld and Skaergaard intrusions, a brief overview of these three intrusions...McBirney and Hunter, 1995; McBirney, 2009) layered intrusion have undergone extensive recrystallization and...layered intrusions, such as the Skaergaard intrusion of East Greenland, to sill-like intrusions such as |  | | Journal (article/letter/editorial) | | in these intrusions and to apatites from the Skaergaard and Kiglapait Intrusions and the Great Dyke....are enriched in Cl compared to those from the Skaergaard and Kiglapait Intrusions. The compositions of...in the Stillwater and Bushveld Complexes, and Skaergaard and Kiglapait Intrusions and the Great Dyke fall...STILLWATER AND BUSHVELD COMPLEXES 971 CUMULUS: A Skaergaard (Nash. 1976, Brown & Peckett, 1977) O Kiglapait...& Whitfleld. 1970. this study) NONCUMULUS: A Skaergaard (Nash, 1976, Brown & Peckett, 1977) 3 Kiglapait |  | | Journal (article/letter/editorial) | | University, Montréal, QC, Canada H3A2T8 Skaergaard layered intrusion) do not cross the liquid–liquid immiscibility...liquids of ferrobasaltic compositions similar to Skaergaard magma with 5 and 10 wt% P2O5 added to the liquids...crystallization order similar to that observed at Skaergaard and none contained liquid immiscible textures...analogue of a possible parental liquid of the Skaergaard intrusion (Brooks and Nielsen 1978). The second composition...wollastonite for Ca, olivine for Mg, MnTiO3 for Ti, chlorapatite for P and apatite for F. The counting times |  | | Journal (article/letter/editorial) | | intercuFig. 2A, B. Backscattered electron images of chlorapatite in an olivine cumulate from the Ultramafic series...fresh chlorapatite grain filling interstitial area between cumulus olivines. The chlorapatite has an...significantly affect the chlorapatite. B Large interstitial grain of chlorapatite which has been partially...the original texture of the chlorapatite has been preserved, the chlorapatite has been replaced, in part...appearance. The REE content of the original chlorapatite (up to ~0.5 wt % Ce20~ + La203) has been partially |  | | Journal (article/letter/editorial) | | Metasomatic replacement in the Sk ergaard Intrusion, East Greenland: Preliminary observations" Alexander R...Metasomatic replacement in the Sk~ergaard Intrusion, East Greenland: Preliminary observations. Chem. Geol...and Marginal Border Series of the Sk~ergaard Intrusion indicate that metasomatic changes have altered...Introduction Recent studies of the Sk~ergaard Intrusion have revealed numerous compositional and structural...1987, 1989) indicated that certain parts of the intrusion may not preserve the original crystal-liquid relations |  | | Journal (article/letter/editorial) | | observed occur in the upper part of the Springvale intrusion, where it is associated with troctolite, and in...single sample from the McIntosh intrusion. For the former intrusion, it is suggested that volatiles migrating...most of the observed variations within any given intrusion. The exceptions include the margins of the intrusions...orogenic belt. The Group I intrusions (e.g., Panton intrusion as the type example) are strongly differentiated...mineralization. Chromite deposits in the Panton intrusion have a resource of 75 Mt of 1.9 g/t Pt + Pd + |  | | Journal (article/letter/editorial) | | 2.7 Ga (DePaolo and Wasserburg 1979) layered intrusion situated in south-central Montana (Fig. 1). More...below). For example, plagioclase from the Rum intrusion can have typical normal zoning of about 20% An...67 − 3.16 − 8.34 4.31 Plagioclase in the Skaergaard intrusion, where the cumulus paradigm was developed...Lower Zone to the lower Middle Zone of the Skaergaard intrusion, which they attribute to buffering by convection...concentrations in apatite that range as high as 50 mol% chlorapatite in OB-V (Boudreau and McCallum 1989) as well |  | ARNASON, JOHN G., BIRD, DENNIS K., BERNSTEIN, STEFAN, ROSE, NICHOLAS M., MANNING, CRAIG E. (1997) Petrology and geochemistry of the Kruuse Fjord Gabbro Complex,
East Greenland. Geological Magazine, 134 (1) 67-89 doi:10.1017/s0016756897006389 | Journal (article/letter/editorial) | | geochemistry of the Kruuse Fjord Gabbro Complex, East Greenland JOHN G. ARNASON*†, DENNIS K. BIRD*, STEFAN BERNSTEIN‡...The Kruuse Fjord Gabbro Complex is a composite intrusion of layered gabbro and troctolite with subordinate...continental crust of East Greenland during early Tertiary rifting of Greenland from Eurasia. The work to...that occur at intervals along the coast of East Greenland between 66°30« and 69° N (Fig. 1). Until recently...Geological map of the Kangerdlugssuaq region of East Greenland. The dashed ellipses enclose areas with basaltic |  | | Journal (article/letter/editorial) | | AND A PGEBEARING ZONE IN THE KIVAKKA LAYERED INTRUSION, NORTHERN KARELIA, RUSSIA ANDREI Y. BARKOV§ Research...(BMS) and interstitial phases [nearly pure Ab, chlorapatite, zircon, Fe-(Ti) oxides, etc.]. Apatite is characterized...intergranular), which attain the composition of chlorapatite (.6 wt.% Cl), not observed below the zone. The...observed maximum (3.3% F) near the top of the intrusion. The PGE-rich zone is inferred to have formed...mineralization, cryptic layering, mafic-ultramafic layered intrusion, Kivakka, Olanga, Karelia, Fennoscandian Shield |  | | Journal (article/letter/editorial) | | compositional evolution of vapor from a basic igneous intrusion. G E N E R A L G EOLO GY A N D P R E V I O U...through the viscous lower margin. Finally, the Dais Intrusion makes up the Dais, a topographic feature about...Basement Sill between the Bull Pass and Dais Intrusion. M ET HODS Apatite grains in polished thin sections...were counted first. Standards included natural chlorapatite (RM-1, Morton & Catanzaro, 1964) and fluorapatite...a low-pressure environment (such as the Skaergaard Intrusion) where apatite is the first halogen-bearing |  | | Journal (article/letter/editorial) | | mafic-ultramafic intrusive complexes emplaced along the East Greenland continental margin containing Au and PGE mineralized...1). Of these, the Platinova reef of the Skaergaard intrusion is most similar in size and morphology to...(Arnason et al., 1997a; 1997b), Nordre Aputitêq intrusion (Arnason and Bird, 1994), and Miki Fjord macrodike...islands in the Kangerdlugssuaq region of East Greenland (Fig. 1). This Eocene complex intrudes Precambrian...map of the Kangerdlugssuaq Fjord region, East Greenland, showing the locations of the Kap Edvard Holm |  | | Journal (article/letter/editorial) | | Cuernavaca (Mexico), Grant (USA), and Breece (USA); chlorapatite was reported in the octahedrites Mount Stifling...the first time similar calculations covering chlorapatite and the paragenetic implications of its presence...to make comparisons with the occurrences of chlorapatite discussed below. It should be noted here that...analyses exist) and abundant graphite occurs with chlorapatite assemblages discussed below. The actual gas...ret~orted chlorapatite ill the coarse octahedrite, Odessa. In both of these irons chlorapatite occurs with |  | | Journal (article/letter/editorial) | | references therein), the layered mafic–ultramafic intrusion formed 2,054 Ma ago and comprises approximately...the Western, Northern, and Eastern lobes. The intrusion is 7–9 km thick and is also referred to as the...samples of the Marginal Zone at the base of the intrusion are primarily composed of orthopyroxenite and...gabbro and norite. Except near the very top of the intrusion, base-metal sulfide minerals are generally scarce...from those of the Skaergaard Intrusion. Although both the Bushveld and the Skaergaard are shallow crustal |  | | Journal (article/letter/editorial) | | compositions of fluorapatite from the Hongge layered intrusion in SW China: A record of prolonged crystallization...Fe-Ti oxide-bearing, mafic-ultramafic layered intrusion in SW China. The fluorapatite is closely associated...reveals that magmatic apatite from a layered intrusion can be intensively modified by later-stage fluid-induced... fluid metasomatism, maficultramafic layered intrusion Introduction Apatite mainly occurs in the upper...of layered intrusions, such as the Skaergaard intrusion in Greenland and the Bushveld complex in South |  | Higashino, Fumiko, Kawakami, Tetsuo, Satish-Kumar, M., Ishikawa, Masahiro, Maki, Kenshi, Tsuchiya, Noriyoshi, Grantham, Geoffrey H., Hirata, Takafumi (2013) Chlorine-rich fluid or melt activity during granulite facies metamorphism in the Late Proterozoic to Cambrian continental collision zone—An example from the Sør Rondane Mountains, East Antarctica. Precambrian Research, 234. 229-246 doi:10.1016/j.precamres.2012.10.006 | Journal (article/letter/editorial) | | by a P-poor rim, in which Cl-rich biotite and chlorapatite are included. Coarse-grained, rounded zircon...occurrence suggests that the Cl-rich biotite and chlorapatite, together with coarse-grained zircon were formed...fluid in equilibrium with Cl-rich biotite and chlorapatite in the garnet rim are estimated to be ten times...layer, retrogression from Grt to Bt is evident No intrusion and marble nearby Yellowish margin of the gneiss...in the matrix. Most of type (ii) grains are chlorapatite (Fig. 11). Type (i) fluorapatite is included |  | Wang, Lian-Xun, Marks, Michael A.W., Wenzel, Thomas, Von Der Handt, Anette, Keller, Jörg, Teiber, Holger, Markl, Gregor (2014) Apatites from the Kaiserstuhl Volcanic Complex, Germany: new constraints on the relationship between carbonatite and associated silicate rocks. European Journal of Mineralogy, 26 (3) 397-414 doi:10.1127/0935-1221/2014/0026-2377 | Journal (article/letter/editorial) | | et al., 2002). The KVC is a sequence of early intrusion and extrusion of alkaline silicate rocks followed... 2002; Engvik et al., 2009). Replacement of chlorapatite by hydroxy-fluorapatite during metasoma0.00...differentiated ultramafic, alkaline and carbonatite intrusion of Vuoriyarvi (Kola Peninsula, Russia). A LA-ICPMS...Grønnedal-Ika carbonatite-syenite complex, south Greenland: carbonatite formation by liquid immiscibility...within apatite: nature and experiment. Part I. Chlorapatite. Am. Mineral., 87, 245–261. Harlov, D.E., Wirth |  | | Book | | critical topics and types of layered igneous intrusion, for which in 1993 he provided a stimulus through...Wager and Deer's classic 1939 memoir on the Skaergaard Intrusion, was thereafter recognized as a major influence...(Bushveld) revealed problems in the application of the Skaergaard model to very thick anorthositic, dunitic or...ultrabasic intrusion in the 1950s. There, an "open system" was proposed (compared with a Skaergaard-type "closed...first for the Rum intrusion and later thought to be applicable to the Bushveld intrusion. Now that electron-probe |  | | Journal (article/letter/editorial) | | Munoz and Swenson 1981; Selby and Nesbitt 2000). Intrusion-related gold systems are a worthy target for similar...in aqueous ¯uids within a single, multiphase intrusion of the Tombstone±Tungsten magmatic belt (TTMB)...the Yukon Territory of Canada (Fig. 2). This intrusion, the Emerald Lake pluton, provides an excellent...an excellent example to explore the nature of intrusion-related mineralization in the Tombstone±Tungsten...compositions representative of the entire TTMB. The intrusion has several zones of subeconomic mineralization |  | She, Yu-Wei, Song, Xie-Yan, Yu, Song-Yue, Chen, Lie-Meng, Zheng, Wen-Qin (2016) Apatite geochemistry of the Taihe layered intrusion, SW China: Implications for the magmatic differentiation and the origin of apatite-rich Fe-Ti oxide ores. Ore Geology Reviews, 78. 151-165 doi:10.1016/j.oregeorev.2016.04.004 | Journal (article/letter/editorial) | | com/locate/oregeorev Apatite geochemistry of the Taihe layered intrusion, SW China: Implications for the magmatic differentiation...Taihe layered intrusion Emeishan large igneous province a b s t r a c t The Taihe intrusion is one of the...China. The cyclic units in the Middle Zone of the intrusion are composed of apatitemagnetite clinopyroxenite...gabbro of the Panzhihua intrusion, situated 100 km to the south of the Taihe intrusion, the apatite of the...such as the Bushveld Complex and the Sept Iles intrusion (Von Gruenewaldt, 1993; Higgins and Doig, 1981) |  | | Journal (article/letter/editorial) | | differentiation of layered intrusions such as the Skaergaard (e.g., Wager, 1960) or the Bushveld (Harney and...wollastonite for Ca, olivine for Mg, MnTiO3 for Ti and chlorapatite for P. Counting times of 20 s on the peak and...composition of a dyke found close to the Skaergaard intrusion and which has been proposed as a possible...possible parental magma of that intrusion (Brooks and Nielsen, 1978). A detailed account of the phase relations...with independent estimates proposed for the Skaergaard intrusion (Wager, 1960; McBirney and Naslund, 1990) |
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