Copper-zinc albite porphyry in the Hersai porphyry copper deposit, East Junggar, China: A transition between late magmatic and hydrothermal porphyry copper deposit

X. Xu, Q. Mao, X. Li, Franco Pirajno, X. Qu, G. Deng, D. Chen, B. Zhang, L. Dong

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A 418. Ma albite porphyry dike emplaced in a 429. Ma granite pluton in the Hersai porphyry copper deposit (Nom, East Junggar, China) consists of euhedral and pale-orange luminescing albite phenocrysts and groundmass, zircons, blue-violet luminescing apatites and chalcopyrite-sphalerite-rich miarolitic cavities. This dike is characterized by two-domain textures presented by albites and disseminated intergranular miarolitic cavities, and by geochemical features of continental island arc and adakitic intrusions.The miarolitic cavities consist of various minerals that crystallized in the following sequence: epidote, rutile and sphalerite-chalcopyrite solid solution, titanite and K-feldspar chalcopyrite with pyrite inclusions; and chlorite, zoisite and calcite. The miarolitic cavities exhibit magmatic to hydrothermal internal textures, such as aplitic textures presented by intergrowths of albite, epidote, rutile and sphalerite-chalcopyrite solid solution, zoning and intersertal texture, poikilitic textures, and layered chlorites. The sphalerite contains a high concentration of exsolved chalcopyrite (up to 10 vol.%). The rutiles intergrown with epidotes contain 137 to 528. ppm Zr corresponding to Zr-in-rutile temperatures of 507 to 625. °C, and the rutiles intergrown with sphalerite-chalcopyrite solid solutions have 381 to 420. ppm Zr and Zr-in-rutile temperatures of 585 to 605. °C. Mineralization temperatures of sphalerite-chalcopyrite solid solutions are possible approximately 600. °C. The formation of the chalcopyrite-sphalerite-rich miarolitic cavities is related to interstitial residual sulfide-rich fluids. The copper-zinc albite porphyry may represent a copper-zinc (Cu-Zn) subtype of porphyry copper deposit that formed as a transition between late magmatic and classical hydrothermal porphyry copper deposits. © 2014 Elsevier B.V.
Original languageEnglish
Pages (from-to)141-156
JournalOre Geology Reviews
Volume61
DOIs
Publication statusPublished - Sep 2014

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Copper deposits
albite
chalcopyrite
porphyry
sphalerite
Zinc
Copper
rutile
zinc
copper
cavity
solid solution
Textures
texture
Solid solutions
epidote
Levees
chlorite
dike
zoisite

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@article{7470faade9884261bc75887ca968d72b,
title = "Copper-zinc albite porphyry in the Hersai porphyry copper deposit, East Junggar, China: A transition between late magmatic and hydrothermal porphyry copper deposit",
abstract = "A 418. Ma albite porphyry dike emplaced in a 429. Ma granite pluton in the Hersai porphyry copper deposit (Nom, East Junggar, China) consists of euhedral and pale-orange luminescing albite phenocrysts and groundmass, zircons, blue-violet luminescing apatites and chalcopyrite-sphalerite-rich miarolitic cavities. This dike is characterized by two-domain textures presented by albites and disseminated intergranular miarolitic cavities, and by geochemical features of continental island arc and adakitic intrusions.The miarolitic cavities consist of various minerals that crystallized in the following sequence: epidote, rutile and sphalerite-chalcopyrite solid solution, titanite and K-feldspar chalcopyrite with pyrite inclusions; and chlorite, zoisite and calcite. The miarolitic cavities exhibit magmatic to hydrothermal internal textures, such as aplitic textures presented by intergrowths of albite, epidote, rutile and sphalerite-chalcopyrite solid solution, zoning and intersertal texture, poikilitic textures, and layered chlorites. The sphalerite contains a high concentration of exsolved chalcopyrite (up to 10 vol.{\%}). The rutiles intergrown with epidotes contain 137 to 528. ppm Zr corresponding to Zr-in-rutile temperatures of 507 to 625. °C, and the rutiles intergrown with sphalerite-chalcopyrite solid solutions have 381 to 420. ppm Zr and Zr-in-rutile temperatures of 585 to 605. °C. Mineralization temperatures of sphalerite-chalcopyrite solid solutions are possible approximately 600. °C. The formation of the chalcopyrite-sphalerite-rich miarolitic cavities is related to interstitial residual sulfide-rich fluids. The copper-zinc albite porphyry may represent a copper-zinc (Cu-Zn) subtype of porphyry copper deposit that formed as a transition between late magmatic and classical hydrothermal porphyry copper deposits. {\circledC} 2014 Elsevier B.V.",
author = "X. Xu and Q. Mao and X. Li and Franco Pirajno and X. Qu and G. Deng and D. Chen and B. Zhang and L. Dong",
year = "2014",
month = "9",
doi = "10.1016/j.oregeorev.2014.01.009",
language = "English",
volume = "61",
pages = "141--156",
journal = "Ore Geology Reviews",
issn = "0169-1368",
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Copper-zinc albite porphyry in the Hersai porphyry copper deposit, East Junggar, China: A transition between late magmatic and hydrothermal porphyry copper deposit. / Xu, X.; Mao, Q.; Li, X.; Pirajno, Franco; Qu, X.; Deng, G.; Chen, D.; Zhang, B.; Dong, L.

In: Ore Geology Reviews, Vol. 61, 09.2014, p. 141-156.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Copper-zinc albite porphyry in the Hersai porphyry copper deposit, East Junggar, China: A transition between late magmatic and hydrothermal porphyry copper deposit

AU - Xu, X.

AU - Mao, Q.

AU - Li, X.

AU - Pirajno, Franco

AU - Qu, X.

AU - Deng, G.

AU - Chen, D.

AU - Zhang, B.

AU - Dong, L.

PY - 2014/9

Y1 - 2014/9

N2 - A 418. Ma albite porphyry dike emplaced in a 429. Ma granite pluton in the Hersai porphyry copper deposit (Nom, East Junggar, China) consists of euhedral and pale-orange luminescing albite phenocrysts and groundmass, zircons, blue-violet luminescing apatites and chalcopyrite-sphalerite-rich miarolitic cavities. This dike is characterized by two-domain textures presented by albites and disseminated intergranular miarolitic cavities, and by geochemical features of continental island arc and adakitic intrusions.The miarolitic cavities consist of various minerals that crystallized in the following sequence: epidote, rutile and sphalerite-chalcopyrite solid solution, titanite and K-feldspar chalcopyrite with pyrite inclusions; and chlorite, zoisite and calcite. The miarolitic cavities exhibit magmatic to hydrothermal internal textures, such as aplitic textures presented by intergrowths of albite, epidote, rutile and sphalerite-chalcopyrite solid solution, zoning and intersertal texture, poikilitic textures, and layered chlorites. The sphalerite contains a high concentration of exsolved chalcopyrite (up to 10 vol.%). The rutiles intergrown with epidotes contain 137 to 528. ppm Zr corresponding to Zr-in-rutile temperatures of 507 to 625. °C, and the rutiles intergrown with sphalerite-chalcopyrite solid solutions have 381 to 420. ppm Zr and Zr-in-rutile temperatures of 585 to 605. °C. Mineralization temperatures of sphalerite-chalcopyrite solid solutions are possible approximately 600. °C. The formation of the chalcopyrite-sphalerite-rich miarolitic cavities is related to interstitial residual sulfide-rich fluids. The copper-zinc albite porphyry may represent a copper-zinc (Cu-Zn) subtype of porphyry copper deposit that formed as a transition between late magmatic and classical hydrothermal porphyry copper deposits. © 2014 Elsevier B.V.

AB - A 418. Ma albite porphyry dike emplaced in a 429. Ma granite pluton in the Hersai porphyry copper deposit (Nom, East Junggar, China) consists of euhedral and pale-orange luminescing albite phenocrysts and groundmass, zircons, blue-violet luminescing apatites and chalcopyrite-sphalerite-rich miarolitic cavities. This dike is characterized by two-domain textures presented by albites and disseminated intergranular miarolitic cavities, and by geochemical features of continental island arc and adakitic intrusions.The miarolitic cavities consist of various minerals that crystallized in the following sequence: epidote, rutile and sphalerite-chalcopyrite solid solution, titanite and K-feldspar chalcopyrite with pyrite inclusions; and chlorite, zoisite and calcite. The miarolitic cavities exhibit magmatic to hydrothermal internal textures, such as aplitic textures presented by intergrowths of albite, epidote, rutile and sphalerite-chalcopyrite solid solution, zoning and intersertal texture, poikilitic textures, and layered chlorites. The sphalerite contains a high concentration of exsolved chalcopyrite (up to 10 vol.%). The rutiles intergrown with epidotes contain 137 to 528. ppm Zr corresponding to Zr-in-rutile temperatures of 507 to 625. °C, and the rutiles intergrown with sphalerite-chalcopyrite solid solutions have 381 to 420. ppm Zr and Zr-in-rutile temperatures of 585 to 605. °C. Mineralization temperatures of sphalerite-chalcopyrite solid solutions are possible approximately 600. °C. The formation of the chalcopyrite-sphalerite-rich miarolitic cavities is related to interstitial residual sulfide-rich fluids. The copper-zinc albite porphyry may represent a copper-zinc (Cu-Zn) subtype of porphyry copper deposit that formed as a transition between late magmatic and classical hydrothermal porphyry copper deposits. © 2014 Elsevier B.V.

U2 - 10.1016/j.oregeorev.2014.01.009

DO - 10.1016/j.oregeorev.2014.01.009

M3 - Article

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SP - 141

EP - 156

JO - Ore Geology Reviews

JF - Ore Geology Reviews

SN - 0169-1368

ER -