Carlin-style gold deposits, Youjiang Basin, China: tectono-thermal and structural analogues of the Carlin-type gold deposits, Nevada, USA

Qingfei Wang, David Groves

Research output: Contribution to journalLetter

2 Citations (Scopus)

Abstract

The Triassic gold deposits of the Youjiang Basin, southern China, have been variously correlated to Carlin-style and orogenic gold deposits or classified as a new intermediate deposit type. However, in terms of a multi-scale mineral system approach, they show remarkable similarities to the Tertiary Carlin-type deposits of Nevada and distinct contrasts to orogenic gold deposits. Both the Nevada and Youjiang deposit groups formed in a continent-scale post-orogenic extension event on fragmented continental crust underlain by metasomatized lithosphere. Both form roughly orthogonal deposit trends that subparallel near-orthogonal margins of a continental crustal block, with deposits controlled by gentle anticlines, monoclines or half-horsts and extensional faults, not tight, “locked-up” anticlines, and shear zones. The mineralogy and ore geochemistry of the two groups are similar, with differences consistent with slightly deeper and higher temperature of formation of the older Chinese deposits, commensurate with deeper erosional levels. The Youjiang gold deposits should be classified as Carlin-type, rather than Carlin-like or other terminologies, with their lower gold endowment probably related to a more distal thermal and fluid source than the Nevada Carlin-type deposits.

Original languageEnglish
Pages (from-to)909-918
Number of pages10
JournalMineralium Deposita
Volume53
Issue number7
DOIs
Publication statusPublished - 1 Oct 2018

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Gold deposits
China
gold
deposits
analogs
Carlin-type deposit
basin
anticline
Geochemistry
Mineralogy
Terminology
monocline
Gold
anticlines
Ores
horst
Minerals
terminology
continental crust
shear zone

Cite this

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title = "Carlin-style gold deposits, Youjiang Basin, China: tectono-thermal and structural analogues of the Carlin-type gold deposits, Nevada, USA",
abstract = "The Triassic gold deposits of the Youjiang Basin, southern China, have been variously correlated to Carlin-style and orogenic gold deposits or classified as a new intermediate deposit type. However, in terms of a multi-scale mineral system approach, they show remarkable similarities to the Tertiary Carlin-type deposits of Nevada and distinct contrasts to orogenic gold deposits. Both the Nevada and Youjiang deposit groups formed in a continent-scale post-orogenic extension event on fragmented continental crust underlain by metasomatized lithosphere. Both form roughly orthogonal deposit trends that subparallel near-orthogonal margins of a continental crustal block, with deposits controlled by gentle anticlines, monoclines or half-horsts and extensional faults, not tight, “locked-up” anticlines, and shear zones. The mineralogy and ore geochemistry of the two groups are similar, with differences consistent with slightly deeper and higher temperature of formation of the older Chinese deposits, commensurate with deeper erosional levels. The Youjiang gold deposits should be classified as Carlin-type, rather than Carlin-like or other terminologies, with their lower gold endowment probably related to a more distal thermal and fluid source than the Nevada Carlin-type deposits.",
author = "Qingfei Wang and David Groves",
year = "2018",
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TY - JOUR

T1 - Carlin-style gold deposits, Youjiang Basin, China

T2 - tectono-thermal and structural analogues of the Carlin-type gold deposits, Nevada, USA

AU - Wang, Qingfei

AU - Groves, David

PY - 2018/10/1

Y1 - 2018/10/1

N2 - The Triassic gold deposits of the Youjiang Basin, southern China, have been variously correlated to Carlin-style and orogenic gold deposits or classified as a new intermediate deposit type. However, in terms of a multi-scale mineral system approach, they show remarkable similarities to the Tertiary Carlin-type deposits of Nevada and distinct contrasts to orogenic gold deposits. Both the Nevada and Youjiang deposit groups formed in a continent-scale post-orogenic extension event on fragmented continental crust underlain by metasomatized lithosphere. Both form roughly orthogonal deposit trends that subparallel near-orthogonal margins of a continental crustal block, with deposits controlled by gentle anticlines, monoclines or half-horsts and extensional faults, not tight, “locked-up” anticlines, and shear zones. The mineralogy and ore geochemistry of the two groups are similar, with differences consistent with slightly deeper and higher temperature of formation of the older Chinese deposits, commensurate with deeper erosional levels. The Youjiang gold deposits should be classified as Carlin-type, rather than Carlin-like or other terminologies, with their lower gold endowment probably related to a more distal thermal and fluid source than the Nevada Carlin-type deposits.

AB - The Triassic gold deposits of the Youjiang Basin, southern China, have been variously correlated to Carlin-style and orogenic gold deposits or classified as a new intermediate deposit type. However, in terms of a multi-scale mineral system approach, they show remarkable similarities to the Tertiary Carlin-type deposits of Nevada and distinct contrasts to orogenic gold deposits. Both the Nevada and Youjiang deposit groups formed in a continent-scale post-orogenic extension event on fragmented continental crust underlain by metasomatized lithosphere. Both form roughly orthogonal deposit trends that subparallel near-orthogonal margins of a continental crustal block, with deposits controlled by gentle anticlines, monoclines or half-horsts and extensional faults, not tight, “locked-up” anticlines, and shear zones. The mineralogy and ore geochemistry of the two groups are similar, with differences consistent with slightly deeper and higher temperature of formation of the older Chinese deposits, commensurate with deeper erosional levels. The Youjiang gold deposits should be classified as Carlin-type, rather than Carlin-like or other terminologies, with their lower gold endowment probably related to a more distal thermal and fluid source than the Nevada Carlin-type deposits.

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U2 - 10.1007/s00126-018-0837-x

DO - 10.1007/s00126-018-0837-x

M3 - Letter

VL - 53

SP - 909

EP - 918

JO - Mineralium Deposita: international journal of geology, mineralogy, and geochemistry of mineral deposits

JF - Mineralium Deposita: international journal of geology, mineralogy, and geochemistry of mineral deposits

SN - 0026-4598

IS - 7

ER -