Prospecting theory and method (with color picture)

porphyry copper deposit model (Sillitoe, 2010);

porphyry copper deposit is a typical 7span porphyry copper deposit _ Mainly from magma; the lower part of the Yinshan silver-copper-lead-zinc deposit is a porphyry copper deposit, and the upper part is a superficial low-temperature hydrothermal silver-lead-zinc deposit.The ore-forming fluid is dominated by magma in the early stage, and more atmospheric precipitation participates in the late stage. The ore-forming material mainly comes from magma; Jinshan and toad stone gold deposits are hydrothermal deposits in the distant contact zone, and the ore-forming fluid is composed of magmatic hydrothermal fluid and atmospheric precipitation. The mixed product, gold mainly comes from the shallow metamorphic rocks of the Shuangqiaoshan Group, which is produced in the shear zone. The three sets of deposits are centered on intermediate-acid granite porphyry or quartz porphyry (high-potassium calcium-alkaline granite), with obvious zoning. From the center to the outside or deep to the shallow part, they are: porphyry copper-gold-molybdenum deposits , Shallow into low-temperature hydrothermal type silver-lead-zinc deposit and distant contact zone hydrothermal type gold deposit.

Deposit model of porphyry copper polymetallic deposit in Dexing ore field _strong8 strong

prospecting and exploration mark, the content of elements in the leaves, especially gold; Lintern et al., 2012

Schematic diagram of metal transfer and leaf enrichment of several types of concealed minerals; according to Anandet a., 2014 _strong8span _strong8span

strong _p14s

The deep part of the coverage area migrates to the surface (Johnson et al., 2004)

The Cu isotopic composition of the leaching layer, the enrichment layer and the primary ore is significantly different. Generally speaking, the leaching layer has a lower δ65Cu value than the enrichment layer and the primary ore, and the enrichment layer often has the heaviest δ65Cu value. .

In the process of secondary ore formation, copper migration and precipitation in the soil and leaching layer iron oxides produce copper-bearing minerals generally have relatively low Cu isotopic composition, but The δ65Cu value has a large variation range.

It Mathurand Fantle. (2015)

mountain bend sheet structure + Rewind retreat (Shaw, 2020)

East Tianshan metallogenic system (Shaw, 2020)

Linglong mine occurred three magmatic events , diorite porphyry (338~340Ma); diorite (332~335 Ma); quartz sodium porphyry or quartz porphyry (318~323 Ma), all formed in subduction environment ( Sun et al., 2020).

Carlin type gold deposits simplified model of evolutionary relationships hydrothermal (Ge et al., 2021)

The multi-scale mineral system model of the Olympic dam-type IOCG deposit of rich hematite (Roger et al., 2019) _strong8span _strong8 strong

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