Gold source is from Caledonian and Hercynian granite.

该区金直接来源于加里东和华力西花岗岩。

youdao

The reduced gold powder was used as a gold source and kept excessive in the process of producing KAu(CN) 2.

保持金粉过量投料，控制氰化亚金钾溶液的浓缩水量是得到高纯度和高收率产品的关键。

youdao

At last, exploring guides for placer gold deposit are pointed out on the base of study of gold source, placer gold distributive features and enrichment law.

结合金的来源、矿床的分布特征和富集规律，指出了该区今后砂金找矿方向。

youdao

For many investors in Asia, gold's role as a source of safety and value has been reinforced over the past year of economic uncertainty.

VOA: standard.2010.07.21

So what we are concentrating on here we will develop gold coming from the source rock and in Sierra Leone this is the first of its kind."

VOA: standard.2010.04.22

What about gold, another great source of wealth for Anglo American?

ECONOMIST: Harry Oppenheimer

Holmes said he expects this source of support for gold to continue, with authorities in these nations looking to gold as they become leery of the rising debt levels and the lack of fiscal discipline devaluing the currencies of other countries.

FORBES: U.S. Global Investors' Holmes: More Gains Ahead For Gold As Monetary Base Expands

It requires companies to examine their supply chains and disclose to the Securities and Exchange Commission (SEC) whether they source tin, tungsten, tantalum, or gold from conflict-mines in the DRC or surrounding countries.

FORBES: Progress Being Made In Eliminating Conflict From Minerals Supply Chains