 | | Journal (article/letter/editorial) | | CARBONATITES FROM A LAMPROPHYRIC DYKE-SWARM, SOUTH WESTLAND, NEW ZEALAND Alan F. COOPER§ and Lorraine A...Geology Department, University of Otago, P.O. Box 56, Dunedin, New Zealand Abstract A late Oligocene – early...Miocene alkali lamprophyre dyke swarm was emplaced in western South Island, New Zealand, during transtensional...transtensional development of the Alpine Fault plate boundary. Intrusive rocks comprise ultramafic and feldspathic...isotope values indicate that all members of the swarm are cogenetic. Efficient fractional crystallization |  | | Journal (article/letter/editorial) | | metabasic rocks by ferrocarbonatites at Haast River, New Zealand Alan F. Cooper, J. Michael Palin, Alice K. Collins...metabasic rocks by ferrocarbonatites at Haast River, New Zealand, LITHOS (2015), doi: 10.1016/j.lithos.2015.11...rocks by ferrocarbonatites at Haast River, New PT Zealand. Cooper, Alan F., Palin, J. Michael, and...Geology Department, University of Otago, Dunedin 9054, New Zealand. Corresponding author: A.F.Cooper...ferrocarbonatite dykes of the Alpine Dyke swarm, MA Westland, New Zealand, intrude greenschist facies |  | | Journal (article/letter/editorial) | | Western Otago, New Zealand by A. F. COOPER Department of Geology, University of Otago, Dunedin, New Zealand...southern part of a lamprophyre dyke swarm from West Otago, New Zealand comprises monchiquites and camptonites...At Haast River, in the northern part of the swarm the dyke association of peridotite, camptonite, trachyte...lamprophyre dyke swarm intrudes schists of the Haast Schist Terrane in South Westland and western Otago, South...South Island, New Zealand (Fig. 1). The swarm extends from the vicinity of the Alpine Fault in the north |  | McCoy-West, A. J., Bennett, V. C., O'Neill, H. S. C., Hermann, J., Puchtel, I. S. (2015) The Interplay between Melting, Refertilization and Carbonatite Metasomatism in Off-Cratonic Lithospheric Mantle under Zealandia: an Integrated Major, Trace and Platinum Group Element Study. Journal of Petrology, 56 (3) 563-604 doi:10.1093/petrology/egv011 | Journal (article/letter/editorial) | | Paleoproterozoic ages and, reinterpreted with the new major and trace element data presented here, demonstrate...partial melting by 12% in fertile xenoliths. A new approach taking into account the effects of subsolidus...carbonatite metasomatism; platinum group elements; New Zealand INTRODUCTION GEOLOGICAL SETTING Zealandia is...>45 million km2 (Mortimer & Campbell, 2014). New Zealand represents the major emergent part of Zealandia...centre of New Zealand. Alkaline basaltic magmatism has occurred sporadically throughout New Zealand over the |  | Nosova, Anna A., Sazonova, Ludmila V., Kargin, Alexey V., Dubinina, Elena O., Minervina, Elena A. (2021) Mineralogy and Geochemistry of Ocelli in the Damtjernite Dykes and Sills, Chadobets Uplift, Siberian Craton: Evidence of the Fluid–Lamprophyric Magma Interaction. Minerals, 11 (7) 724 doi:10.3390/min11070724 | Journal (article/letter/editorial) | | potassium feldspar, albite, apatite and minor quartz ocelli (K-Na-CSO); carbonate–silicate ocelli, containing...Na-scapolite, potassium feldspar, albite, apatite, minor quartz massive aggregates of tabular anhedral crystals...5–3.0 mm carbonate, natrolite, thomsonite, minor quartz laths and tabular crystals or needle-shaped radial... Potassium feldspar, albite, apatite and minor quartz are present. In contrast with the Na-silicate-bearing...aggregates of natrolite and thomsonite dominate. Quartz is interstitial to the Na-silicates. Carbonate–silicate |  | Kargin, Alexey Vladimirovich, Nosova, Anna Andreevna, Sazonova, Ludmila Vyacheslavovna, Tretyachenko, Vladimir Vasilievich, Larionova, Yulia Olegovna, Kovalchuk, Elena Vladimirovna (2021) Ultramafic Alkaline Rocks of Kepino Cluster, Arkhangelsk, Russia: Different Evolution of Kimberlite Melts in Sills and Pipes. Minerals, 11 (5) 540 doi:10.3390/min11050540 | Journal (article/letter/editorial) | | kargin-igem@mail.ru; Tel.: +7-4992308243 Abstract: To provide new insights into the evolution of kimberlitic magmas...much more extended than previously assumed, and new age data for various kimberlite bodies (pipes, sills...fragments of host rocks or their minerals (carbonate, quartz, feldspars) set in carbonate–serpentine matrixes...dykes. Local stress variations stopped kimberlite-dyke propagation. The high content of the carbonate component...thealllocal had changed did not impede the kimberlite dyke from Initially, the stress magma batches mayand |  | | Journal (article/letter/editorial) | | carried out using known phase transitions in SiO2 (quartz-coesite) [32] and CaGeO3 (garnet-perovskite) [33]...micrometers in size are concentrated in the LT region (Figure 2g,i). The further pressure increase to...micrometers in size are concentrated in the LT region (Figure 2g,i). Figure 3. modes in mole fractions...prismatic Cpx crystals up to 150 µ m in the LT region 4j). side. In addition, euhedral Grt crystals appear...complete melting and consists of At 1500 in the LT region (Figure 4j). the products quenching two carbonate |
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