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Koloula Complex

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Journal Article
Journal: Economic Geology
Published: 01 August 1978
Economic Geology (1978) 73 (5): 645–677.
...A. R. Chivas Abstract The Koloula Igneous Complex on the island of Guadalcanal consists of a low-K calc-alkaline sequence of 26 different intrusive phases. The oldest phase is a leucogabbro within which occurs a tabular cumulate body of olivine pyroxenite. Younger phases include diorites, quartz...
Journal Article
Journal: Economic Geology
Published: 01 August 1978
Economic Geology (1978) 73 (5): 678–689.
...A. R. Chivas; I. McDougall Abstract K-Ar ages are reported for the major intrusive and mineralization episodes from the Koloula Igneous Complex. Two major cycles of igneous activity occurred. Cycle 1 rocks (gabbro including olivine pyroxenite, diorite, Vasuata Quartz Diorite, dolerite dikes...
Journal Article
Journal: Economic Geology
Published: 01 April 1977
Economic Geology (1977) 72 (2): 153–169.
...A. R. Chivas; R. W. T. Wilkins Abstract The Koloula Igneous Complex on the island of Guadalcanal, part of the British Solomon Islands Protectorate, consists of a calc-alkaline sequence of 26 intrusive phases ranging from leucogabbro through diorites and granodiorites to andesite dikes...
Journal Article
Journal: Economic Geology
Published: 01 August 1978
Economic Geology (1978) 73 (5): 857–877.
... of suite chemistries occurs in the New Guinea Mobile Belt (continental margin) and Outer Melanesian island-arc settings. The highest K suite occurs in the continental setting (Ok Tedi Complex) and the lowest K suite occurs in an island-arc setting (Koloula Igneous Complex).Porphyry copper mineralization...
Journal Article
Journal: GSA Bulletin
Published: 01 July 2017
GSA Bulletin (2017) 129 (7-8): 920–946.
...Amy K. Gilmer; R.S.J. Sparks; Alison C. Rust; Simon Tapster; Adam D. Webb; Dan N. Barfod Abstract The Don Manuel igneous complex and associated porphyry copper mineralization in the Andean Cordillera of central Chile demonstrate similarities between intrusive complexes associated with porphyry...
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Journal Article
Journal: Economic Geology
Published: 01 August 2000
Economic Geology (2000) 95 (5): 1067–1089.
... similar to those from fresh quartz-monzodiorite, suggesting that the fluids were hot and of magmatic composition. Sodium and Ca were added and K, Fe, Cl, and Cu were stripped during what is interpreted as an autometasomatic event. The sills display considerable textural and mineralogical complexity...
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Journal Article
Journal: Economic Geology
Published: 01 June 2009
Economic Geology (2009) 104 (4): 479–504.
... related to a mid-Miocene diatreme-dome complex. In order to constrain the duration of the magmatic-hydrothermal system at Cerro de Pasco, U-Pb age determinations and Hf isotope determinations have been conducted on single zircon grains. Biotite from intrusive rocks, and sericite and alunite related...
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Journal Article
Journal: Economic Geology
Published: 01 January 2018
Economic Geology (2018) 113 (1): 133–161.
...-stage anhydrite-pyrite veins and chlorite-illite alteration overprinted the quartz diorite intrusive complex. The final hydrothermal event consisted of argillic alteration that was concentrated in and around steeply dipping, ENE-trending shears. These structures appear to have controlled the emplacement...
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Journal Article
Published: 01 October 2005
The Canadian Mineralogist (2005) 43 (5): 1781–1796.
... minerals, Koloula igneous complex . Contrib. Mineral. Petrol . 78 , 404 – 412 . Holland , H.D. ( 1959 ): Stability relations among the oxides, sulfides, sulfates and carbonates of ore and gangue metals. 1. Some applications of thermochemical data to problems of ore deposits . Econ. Geol...
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Series: Economic Geology
Published: 01 January 2005
DOI: 10.5382/AV100.27
EISBN: 9781934969519
...-sulfidation epithermal (2,659 t Au), lowsulfidation epithermal (1,837 t Au), and skarn (983 t Au, 9.2 Mt Cu) deposits. Twenty major magmatic arcs and several less extensive arcs of Cenozoic age form a complex border to the Sundaland core of the Eurasian plate in Southeast Asia and the northern margin...
Journal Article
Journal: Geology
Published: 01 July 2017
Geology (2017) 45 (7): 623–626.
... and trace element geochemistry with (2) plagioclase textures, we discovered an intimate connection between an ignimbrite eruption and a nearby world-class porphyry deposit (Bajo de la Alumbrera in the late Miocene Farallón Negro Volcanic Complex of Argentina). Our results indicate that the magmatic...
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Journal Article
Journal: Economic Geology
Published: 01 November 2019
Economic Geology (2019) 114 (7): 1365–1388.
... constrain the thermal and chemical evolution of this complex intrusive suite and allow an evaluation of the usefulness of zircon as a mineral exploration proxy for porphyry copper deposits. Our results combined with Rayleigh fractionation modeling indicate that the trace element composition of zircon (Th/U...
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Series: Reviews in Economic Geology
Published: 01 January 2000
DOI: 10.5382/Rev.13.15
EISBN: 9781629490205
... distinct geodynamic settings. Orogenic gold deposits are generated at midcrustal (4–16 km) levels proximal to terrane boundaries, in transpressional subduction-accretion complexes of cordilleran-style orogenic belts; other orogenic gold provinces form inboard by delamination of mantle lithosphere...
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Journal Article
Published: 14 June 2019
Geochemistry: Exploration, Environment, Analysis (2019) geochem2018-077.
... with the Luhr Hill granite and granite porphyry dykes, part of the Yerington batholith ( Proffett & Dilles 1984 ; Dilles 1987 ; Dilles & Wright 1988 ). The Yerington batholith is a medium- to high-K calc-alkaline polyphase intrusive complex ( Dilles 1987 ). The batholith intruded a sequence...
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Journal Article
Journal: Geology
Published: 01 December 2014
Geology (2014) 42 (12): 1087–1090.
..., we focus on the geochronological record contained within a tonalite (X008) and three representative diorites (X002, UM13B, UM14B; Table DR1 in the GSA Data Repository 1 ) of the 20 km 2 Umasani plutonic complex ( Fig. 1C ). Sample descriptions, methodology, representative zircon...
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Journal Article
Published: 03 November 2016
Journal of the Geological Society (2017) 174 (1): 14–17.
... demonstrated that the dolerites (variably ‘spotted’) exposed in the adjacent region, in particular in the Mynydd Preseli area, are geochemically identical to the erupted basaltic lavas of the Fishguard Volcanic Group and the whole volcanic assemblage has been termed the Fishguard Volcanic Complex ( Bevins et...
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Journal Article
Published: 01 August 2017
Reviews in Mineralogy and Geochemistry (2017) 83 (1): 297–328.
... involving CA-ID-TIMS high-precision U–Pb age determination is complex and consists of a combination of in situ and bulk-dissolution techniques ( Fig. 1 ). Figure 1. Schematic workflow for CA-ID-TIMS U–Pb petrochronology in igneous systems. Imaging of the textural relationships from a thin...
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Journal Article
Published: 01 April 2017
American Mineralogist (2017) 102 (4): 766–776.
... of the leucogranite dikes extending radially out from the Listino Ring Complex are suggestive of residual melt that was expelled from Monoccola Granodiorite after the emplacement of the hydrous Listino Ring Gabbro ( John and Blundy 1993 ). The rapid cooling and crystallization of this gabbro led to volatile...
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Journal Article
Journal: Economic Geology
Published: 01 November 2017
Economic Geology (2017) 112 (7): 1653–1672.
... emplacement in the context of porphyry copper formation. We compare their results with ours. The Yerington batholith is a Middle Jurassic (169–168 Ma) composite silicic intrusive complex comprising about 250 km 2 of exposed plutonic rocks, which contains four discovered porphyry copper deposits...
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Journal Article
Journal: Economic Geology
Published: 01 January 2018
Economic Geology (2018) 113 (1): 39–61.
.... The Ok Tedi intrusive complex is located in the Star Mountains Cu province of the fold-and-thrust belt ( Fig. 2 ). The Star Mountains host a number of regional intrusive centers, some of which are associated with varying amounts of Au-Cu mineralization ( Arnold and Griffin, 1978 ). A group of magmatic...
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