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Zamora Batholith

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Series: Geological Society, London, Engineering Geology Special Publications
Published: 01 January 2005
DOI: 10.5382/SP.11.19
EISBN: 9781629490359
... on topographic highs (ridges), whereas topographic lows (valley bottoms) are commonly underlain by the Zamora batholith, which at this scale cannot be shown. Similarly, the area with discontinuous skarn bodies represents 20 to 30 percent of skarn outcrop at the most. a = Fortuna northern sector, b = Fortuna mine...
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Journal Article
Journal: Economic Geology
Published: 01 January 2013
Economic Geology (2013) 108 (1): 11-35.
... a Middle Jurassic age for granodiorite of the Zamora batholith at this location (163.8 ± 1.9 Ma), and Late Jurassic ages for subvolcanic intrusions (156.2 ± 1.0 and 153.1 ± 1.3 Ma). Re-Os molybdenite ages average 156 ± 1.0 Ma and indicate coeval mineralization between Mirador and Mirador Norte...
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Journal Article
Journal: Economic Geology
Published: 01 August 2016
Economic Geology (2016) 111 (5): 1043-1072.
... porphyry, and associated phreatic breccias are assigned to the Piuntza unit of the Santiago Formation, which, along with the Zamora batholith and a series of porphyry copper stocks, was generated in a continental margin magmatic arc during the Middle to Late Jurassic. The deposit is located near...
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Journal Article
Published: 01 May 2006
European Journal of Mineralogy (2006) 18 (3): 369-377.
...Encarnación RODA-ROBLES; Alfonso PESQUERA; Pedro P. GIL-CRESPO; José TORRES-RUIZ; Philippe DE PARSEVAL AbstractThe highly fractionated, Li-F-Be-B-P-bearing Pinilla de Fermoselle (PF) pegmatite crops out in the westernmost part of the Zamora province (Spain). This body appears as a cupola over...
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Journal Article
Published: 01 November 2005
American Mineralogist (2005) 90 (11-12): 1887-1899.
... the Hub Kapong batholith of peninsular Thailand . Mineralogical Magazine , 45 , 139 – 147 . Martín-Izard , A. , Reguilón , R. , and Palero , F. ( 1992 ) Las mineralizaciones litiníferas del oeste de Salamanca y Zamora . Estudios Geológicos , 48 , 9 – 13 . Martínez...
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Series: Special Publications of the Society of Economic Geologists
Published: 01 January 2012
DOI: 10.5382/SP.16.05
EISBN: 9781629490410
... and Farellones Formations represent premineralization host rocks ranging in age between 22.7 ± 0.4 and 16.8 ± 0.3 Ma (U-Pb dating of zircons). The bulk of the copper-molybdenum porphyry endowment is related to evolution of the San Francisco batholith, a large (200 km 2 ) granodiorite-dominated complex with U-Pb...
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Journal Article
Published: 01 February 2012
Mineralogical Magazine (2012) 76 (1): 1-24.
...T. Llorens; M. C. Moro AbstractThe residual melts that remained after the consolidation of the Jálama batholith crystallized to form a group of intra-granitic pegmatite dykes, which are hosted by its outermost facies (the External Unit), and the most evolved residual melts migrated through...
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Journal Article
Journal: Lithosphere
Published: 01 June 2017
Lithosphere (2017) 9 (3): 343-365.
...Joshua J. Schwartz; Keith A. Klepeis; Joseph F. Sadorski; Harold H. Stowell; Andy J. Tulloch; Matthew A. Coble AbstractWe investigate the temporal record of magmatism in the Fiordland sector of the Median Batholith (New Zealand) with the goal of evaluating models for cyclic and episodic patterns...
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Series: Economic Geology
Published: 01 January 2005
DOI: 10.5382/AV100.13
EISBN: 9781934969519
... of porphyry Cu-Au–rich systems (modified from Seedorff et al., 2005 ). Large tracts of the eastern Mount Isa block are well exposed, allowing the recognition of extensive alkali metasomatism around the batholithic granitoids. This alteration system bears a strong resemblance to that associated...
Journal Article
Journal: Economic Geology
Published: 01 January 2002
Economic Geology (2002) 97 (1): 59-71.
...Ryan Mathur; Robert Marschik; Joaquin Ruiz; Francisco Munizaga; Richard A. Leveille; Walter Martin AbstractRe-Os isotopes are used to determine the age of iron oxide Cu-Au mineralization at Candelaria, Chile, and to explore possible genetic links with the batholithic intrusions in the area. Re-Os...
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Journal Article
Journal: Economic Geology
Published: 01 December 2001
Economic Geology (2001) 96 (8): 1799-1826.
...Robert Marschik; Lluís Fontboté AbstractSeveral iron oxide-rich Cu-Au(-Zn-Ag) deposits define an approximately 5-km-wide and at least 20-km-long belt along the eastern margin of the coastal batholith near Copiapó, Chile. This belt includes the large Candelaria mine and a group...
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Journal Article
Journal: Lithosphere
Published: 20 December 2018
Lithosphere (2018) 11 (1): 91-128.
... regional and detailed geochemical isotopic and textural data. The Stewart dike, like other pegmatites in the Pala district and other major pegmatite districts in the northern Peninsular Ranges batholith, is enclosed within gabbro/mafic tonalite. The 40 Ar/ 39 Ar method of dating on muscovite from the dike...
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Journal Article
Journal: Geosphere
Published: 01 June 2016
Geosphere (2016) 12 (3): 647-677.
... thickening to crustal thinning and extensional collapse. Data reveal that garnet granulite facies metamorphism and partial melting in the lower crust partially overlapped with crustal thickening and batholith construction during emplacement of the Western Fiordland Orthogneiss (WFO) from 118 to 115 Ma...
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Journal Article
Published: 01 July 2016
The Canadian Mineralogist (2016) 54 (4): 847-862.
... rocks, and (2) partial melts from a relatively rare-element-rich source. In southeast Ireland, spodumene and spodumene-free pegmatite dikes occur along the eastern margin of the S-type Leinster Granite batholith. With indistinguishable emplacement ages around 400 Ma, the origin of the Li-rich pegmatitic...
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Journal Article
Journal: Economic Geology
Published: 01 January 2010
Economic Geology (2010) 105 (1): 155-185.
... boundary-parallel, Aptian to Albian Cañete basin, accompanied by the earliest, largely granodioritic-dioritic, stocks of the Coastal batholith. Alteration and mineralization assemblages, supported by 40Ar/39Ar geochronology of biotite, phlogopite, actinolite, cummingtonite, and K-feldspars, reveal...
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Inset shows location of the Mirador Cu-Au district, located in southeast Ec...
Published: 01 January 2013
Fig 1. Inset shows location of the Mirador Cu-Au district, located in southeast Ecuador toward the northern end of the Zamora batholith, the southernmost of three Jurassic I-type intrusions within the sub-Andean region. Modified from Gendall et al. (2000) .
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Regional setting of the Fruta del Norte epithermal gold-silver deposit, sou...
Published: 01 August 2016
Ecuador and contiguous Peru. Note that, for sake of clarity, the postmineralization Cretaceous cover has been removed from the Zamora batholith along the Pangui copper belt. Deposit abbreviations: BLP = Bonza-Las Peñas, C = Chinapintza, M = Mirador, N = Nambija, P = Panantza, SC = San Carlos, SL = San
Image
Lithologic units at Mirador. A. Potassic-altered equigranular granodiorite ...
Published: 01 January 2013
Fig 7. Lithologic units at Mirador. A. Potassic-altered equigranular granodiorite of the Zamora batholith. B. Potassic-altered early feldspar-hornblende porphyry, showing complete replacement of hornblende (HBL) by secondary brown biotite. C. Early mineralized breccia, with fragments of Zamora
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Stratigraphic section for Mesozoic rocks of southeast Ecuador, placing the ...
Published: 01 January 2013
and epithermal) circles. Questionable older Rb-Sr and K-Ar dates for the Zamora batholith give it a wide range of ages, from 246 to 164 Ma. The earliest plausible age is 190 Ma, based on Sinemurian fossil evidence from the Santiago Formation, which the batholith intrudes. The regional U-Pb and Re-Os dates
Image
Schematic historic depiction of events from Early Jurassic to Present; symb...
Published: 01 January 2013
Fig 12. Schematic historic depiction of events from Early Jurassic to Present; symbols for age dating methods as in Figure 1 . A. Intrusion of the Zamora batholith into Santiago Formation marine sedimentary rocks and Piuntza unit volcanic rocks finishes ca. 164 Ma; this initializes isostatic