 | | Journal (article/letter/editorial) | | in Miocene Calc-alkaline Volcanics from Northland, New Zealand by R. A. DAY 1 *, T. H. GREEN 1 , AND I...University of Auckland, Private Bag, Auckland, New Zealand (Received 22 May 1990; revised typescript accepted...Miocene high-silica andesites and dacites, Northland, New Zealand. Microstructures of these xenoliths range...Metamorphic xenoliths with plagioclase-hornblende-quartz assemblages are also found in the rocks and are...obduction-related tectonic events operative in Northland just before the magmatic episode, and to the unusually |  | | Journal (article/letter/editorial) | | of Garnets in Andesitic Rocks from the Northland Arc, New Zealand, and their Implication for Sub-arc Processes...92019, AUCKLAND MAIL CENTRE 1142, AUCKLAND, NEW ZEALAND RECEIVED FEBRUARY 3, 2011; ACCEPTED FEBRUARY...suite from the Miocene volcanic arc in Northland, New Zealand, comprises pyroxene andesite and garnetbearing...andesite; subduction processes; magmatic garnets; Northland Arc I N T RO D U C T I O N Garnet-bearing volcanic...of the Northland volcanic arc (Smith et al., 1989; Booden et al., 2011) in northern New Zealand. Garnets |  | | Journal (article/letter/editorial) | | Fe-rich pyroxenes from a microdiorite dike, Whangarei, New T,ealand RlvvroNo N. BnorHnnsf Department of...University of Auckland, Private Bag, Auckland, New Zealand K,rzunrr Yoxovlvra Department of Geology, National...Ansrn-lcr Pyroxenesin a microdiorite dike near Whangarei,New Zealand,formed during cooling from magmatictemperatures>900'C...700 'C, respectively. INrnonucrroN Near Whangarei,New Zealand,basementPermian-Jurassic prehnite-pumpellyite...with similar SiO, contents from the nearby Whangarei Heads calc-alkaline suite, the microdiorite has higher |  | | Report (issue) | | NEW ZEALAND DEPARTMENT OF SCIENTIFIC AND INDUSTRIAL RESEARCH NEW ZEALAND GEOLOGICAL SURVEY 125th ANNIVERSARY...1865 -1990 NEW ZEALAND GEOLOGICAL SURVEY BULLETIN 104 ISSN 0077-9628 Minerals of New Zealand by G. L....initials should be G.T., not G.L. Lower Hutt, New Zealand 1990 I I Beach sand, alluvium, • terrace...Figure 1. Simplified geological sketch-map of New Zealand. 0 20 40 60 80 100 KM l INTRODUCTION It...Morgan's "Minerals and Mineral Substances of New Zealand" was published, as NZ. Geological Survey bulletin |  | | | | NORTH ISLAND NEW ZEALAND Poor Kn1ght1 Is • . ,, r ,n H~n & C h1ck...Rivt~r I'. MY OF East C,pe Pf.NEW PLYMO • Cil.pe Eimo C • Portl.lfld I MY Secretar)'...ISLAND f Pq,1 Pt., 1~s II t I SOUTH ISLAND NEW ZEALAND +I s University College Cardiff Library...' _____ TELE - . _, • The Geology of New Zealand Volume 2 •• J-----~---.. ~ ::,,::::j::~....Associate Editors: G. R. Stevens, M. T. Te Punga New Zealand Geological Survey, Department of Scientific and |  | | Book (volume) | | NORTH ISLAND NEW ZEALAND Poor Kn1ght1 Is • . ,, r ,n H~n & C h1ck...Rivt~r I'. MY OF East C,pe Pf.NEW PLYMO • Cil.pe Eimo C • Portl.lfld I MY Secretar)'...ISLAND f Pq,1 Pt., 1~s II t I SOUTH ISLAND NEW ZEALAND +I s University College Cardiff Library...' _____ TELE - . _, • The Geology of New Zealand Volume 2 •• J-----~---.. ~ ::,,::::j::~....Associate Editors: G. R. Stevens, M. T. Te Punga New Zealand Geological Survey, Department of Scientific and |  | | Journal (article/letter/editorial) | | a r d s ( 1 9 3 6 )p o s t u l a t e d that New Zealand and Australian garnetscrystallized from a magma...g e l yq u a r t z monzonite, granodiorite, and quartz diorite, but range in composition from gabbro to...of this concentrically-zonedbatholith consistsof quartz diorite and granodiorite which locally intrude...from the aplite graphic intergrowths of garnet-quartz and garnet(Y77) have rims enriched in spessartine(2...Interesting xenoliths from Whangarei Heads, Auckland, New Zealand. Trans R Soc. New Zealand, 67,251-280. Beaman |
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