Brazil uses forensic science to trace gold's origin, tackle illegal mining in the Amazon, Pg12

Key Highlights:

• Brazil is employing forensic science, specifically "gold fingerprinting," to combat illegal gold mining in the Amazon rainforest.
• The National Institute of Criminalistics in Brasilia has established a "gold lab" to analyze gold samples and trace their origin.
• Illegal mining has led to significant deforestation, with an estimated 496,000 hectares cut down since 2023, and dangerous levels of mercury contamination.
• The method helps determine if seized gold originates from protected areas or Indigenous lands, countering fraud in legal markets.
• A federal court in Para ordered institutions like the Central Bank and the National Mining Agency to enhance gold traceability.

Gold Fingerprinting.jpg

Detailed Insights:

• "Gold fingerprinting" works by analyzing trace elements like silver and copper absorbed by gold deposits from their specific geological environment.
• This unique elemental composition acts as a "fingerprint," allowing investigators to verify the claimed origin of gold samples.
• The forensic method, developed since 2019 with Brazilian universities, utilizes advanced tools for precise analysis.
• Illegal gold is often introduced into legal markets through fraudulent means, similar to illicit cattle and timber.
• The Federal Court of Accounts found evidence that permits issued by the National Mining Agency were misused to launder illegally extracted gold.
• Federal prosecutors have filed a lawsuit against the National Mining Agency for better oversight of mining permits.
• The surge in global gold prices has intensified the mining rush in the Amazon, exacerbating environmental damage.
• Criminal networks are reportedly exploring neighboring countries like Venezuela, French Guiana, and Suriname to launder illegally mined gold.

Scientific/Technical Concepts Involved:

• Gold Fingerprinting: A forensic technique that traces the origin of gold samples by analyzing their unique elemental composition.
• X-ray Fluorescence Spectrometry: A non-destructive analytical technique used to determine the elemental composition of materials.
• Scanning Electron Microscopy: A type of electron microscope that produces images of a sample by scanning it with a focused beam of electrons.
• Laser Ablation Mass Spectrometry: A technique that uses a laser to ablate material from a sample, which is then analyzed by a mass spectrometer to determine its elemental and isotopic composition.