scholarly journals Geology and Age Constraints on the Origin of the Intrusion-Related, Sheeted Vein-Type Åkerberg Gold Deposit, Skellefte District, Sweden

Minerals ◽  
2012 ◽  
Vol 2 (4) ◽  
pp. 385-416 ◽  
Author(s):  
Kjell Billström ◽  
Benny Mattson ◽  
Ulf Söderlund ◽  
Hans Årebäck ◽  
Curt Broman
Keyword(s):  
Gold Deposit ◽  
Skellefte District ◽  
Vein Type ◽  
Age Constraints

scholarly journals Trace Element Geochemistry in Quartz in the Jinqingding Gold Deposit, Jiaodong Peninsula, China: Implications for the Gold Precipitation Mechanism

Minerals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 326 ◽  
Author(s):  
Binghan Chen ◽  
Jun Deng ◽  
Hantao Wei ◽  
Xingzhong Ji
Keyword(s):  
Trace Element ◽  
Gold Deposit ◽  
Quartz Vein ◽  
Trace Element Content ◽  
Element Content ◽  
Trace Element Geochemistry ◽  
Precipitation Mechanism ◽  
Al Content ◽  
Free Gold ◽  
Vein Type

Lots of studies on gold precipitation mechanisms have focused on fluid inclusions within quartz. However, the trace elements in quartz reflect the properties of the ore fluid, and a comparison of the trace element content in different types of quartz can reveal the precipitation mechanism. The Jinqingding gold deposit is the largest gold deposit in the Muping–Rushan gold belt and contains the largest single sulfide–quartz vein type orebody in the gold belt. This study distinguished four types of quartz in this orebody through field work and investigations of the mineralogy and cathodoluminescence (CL) of the quartz and crosscutting relationships as seen under a microscope. In situ studies via electron probe micro-analyzer (EPMA) and laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) were used to determine the trace element content of the different quartz types. Type Qa displayed a comb structure in the field and zoning under the microscope and in CL. Milky white and smoke grey Qb was the most common quartz type and hosted the most sulfide and gold. Qc was Qa and Qb quartz that recrystallized around pyrite or overgrew and appeared different from Qa and Qb in CL images. Qd occurred within fractures in pyrite. Qa formed prior to the mineralization of gold, and Qd formed post-mineralization. Qb and Qc provided information regarding the ore fluid during mineralization. Sericites occurred with pyrite in fractures in the quartz, and some, along with free gold, filled in fractures in pyrite. Free gold occurred within Qa, Qb, Qc, and in brittle fractures in pyrite. Qc had the lowest Al content of all of the quartz types. As Al content is related to the acidity of the ore fluid in previous study, this indicated an acidity decrease during mineralization, which could be attributed to the sericitization. Sericitization could indicate a potential gold occurrence. The Ti content decreased from Qb to Qc, indicating a decrease in temperature during quartz overgrowth formation. Change in acidity and cooling can therefore be identified as possible causes of gold precipitation in the sulfide–quartz vein type in the Jinqingding gold deposit.

Geology, fluid inclusion and age constraints on the genesis of the Sarekuobu gold deposit in Altay, NW China

2014 ◽  
Vol 49 (6) ◽  
pp. 635-648 ◽  
Author(s):  
Li Zhang ◽  
Hua-Yong Chen ◽  
Yi Zheng ◽  
Ya-Jing Qin ◽  
Deng-Feng Li
Keyword(s):  
Fluid Inclusion ◽  
Gold Deposit ◽  
Nw China ◽  
Age Constraints

scholarly journals Determination of age and source constraints for the Bake quartz vein-type gold deposit in SE Guizhou using arsenopyrite Re-Os chronology and REE characteristics

2015 ◽  
Vol 49 (1) ◽  
pp. 73-81 ◽  
Author(s):  
Jiasheng Wang ◽  
Hanjie Wen ◽  
Chao Li ◽  
Xiaojun Jiang ◽  
Chuanwei Zhu ◽  
...  
Keyword(s):  
Gold Deposit ◽  
Quartz Vein ◽  
Vein Type

Age constraints on the hydrothermal history of the Prominent Hill iron oxide copper-gold deposit, South Australia

2016 ◽  
Vol 52 (6) ◽  
pp. 863-881 ◽  
Author(s):  
Bryan Bowden ◽  
Geoff Fraser ◽  
Garry J Davidson ◽  
Sebastien Meffre ◽  
Roger Skirrow ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Gold Deposit ◽  
South Australia ◽  
Copper Gold ◽  
History Of ◽  
Age Constraints
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