Secrets of the Kalmakyr Gold-Rich Porphyry Cu Deposit in Uzbekistan

Posted on: 2023-05-01 15:06:27


A recent groundbreaking study sheds light on the mysteries of the Kalmakyr gold-rich porphyry Cu deposit in the Tien Shan region of Uzbekistan, the world's fifth-largest gold producer. The article, titled "Contrasting Apatite Geochemistry between Ore-Bearing and Ore-Barren Intrusions of the Giant Kalmakyr Gold-Rich Porphyry Cu Deposit, Tien Shan, Uzbekistan," explores the mineralogical differences between ore-bearing and ore-barren intrusions to better understand the processes that led to the deposit's formation. In this blog post, we'll delve into the fascinating findings of this study and explore the implications of this research on mineral exploration and mining in the region.

Apatite: The Key to Understanding the Kalmakyr Deposit:

Apatite, a phosphate mineral, plays a central role in the researchers' analysis of the Kalmakyr deposit. The study focused on contrasting the geochemical properties of apatite between ore-bearing and ore-barren intrusions. Petrographic observations indicate that apatite is commonly found as an inclusion in phenocrysts such as biotite, plagioclase, and hornblende, suggesting that it formed during the early stages of magma evolution.

Findings: Contrasting Apatite Geochemistry:

The study uncovered distinct differences in apatite geochemistry between ore-bearing and ore-barren intrusions in the Kalmakyr deposit. The most notable contrast is the higher concentration of chlorine (Cl) in apatite crystals from ore-bearing intrusions compared to ore-barren intrusions. This finding suggests that chlorine played a crucial role in the transport and deposition of metals, such as copper and gold, in the ore-bearing intrusions.

Implications for Mineral Exploration and Mining:

The contrasting apatite geochemistry between ore-bearing and ore-barren intrusions provides valuable insights into the mechanisms responsible for the formation of the Kalmakyr gold-rich porphyry Cu deposit. The researchers' findings may prove useful for mineral exploration in the Tien Shan region, as the study establishes apatite as a potential geochemical indicator for identifying mineral-rich areas. By focusing on areas with similar apatite geochemical signatures, mineral exploration companies may be able to pinpoint new, untapped deposits in the region, ultimately enhancing the efficiency and profitability of mining operations.


The Kalmakyr gold-rich porphyry Cu deposit is a geological enigma, and the recent study on contrasting apatite geochemistry has shed new light on the mechanisms responsible for its formation. By understanding the key role that apatite plays in the deposit's geochemistry, researchers have opened the door to more targeted mineral exploration and mining in the Tien Shan region, ultimately contributing to the advancement of our knowledge of Earth's geological processes and resources.

Read the full article here