Carlin-type gold deposits John L. Muntean 1 *, Jean S. Cline 2, Adam C. Simon 2 and Anthony A. Longo 2 The Eocene epoch in the Great Basin of western North America was a period of profuse ...
Here, the gold is further concentrated by the action of water. Because gold is heavier than most of the material moved by a creek or river, it can become concentrated in hollows and trapped in the bed of the river. These are known as secondary (alluvial) gold deposits and they can be worked using a gold pan or cradle. Alluvial gold deposits ...
1. Introduction. The Nanpanjiang basin, located in southwestern China, is the second-largest concentration of Carlin-type gold deposit (CTD) in the world (Hu et al., 2002, Su et al., 2018).The basin hosts>200 gold deposits or occurrences with total proven gold reserves of ca. 800 t at an average grade of 4.5 g/t (Pi et al., 2017, Su et al., 2018). ...
1. Introduction. The Asian continent hosts some of the major Phanerozoic gold deposits of the world formed under different tectonic settings and through varied geological processes (Goldfarb et al., 2014, Khomich et al., 2014, Zaw et al., 2014, and references therein).Among these, the Carlin-type deposits are relatively rare, as compared to the …
Carlin-type deposits are typically mined using open-pit mining methods and complex extraction techniques, such as heap leaching and carbon-in-pulp (CIP) processing. Epithermal Deposits: Epithermal deposits are another type of gold occurrence that is typically found in volcanic regions. These deposits are formed when hot, mineral-rich …
This report summarizes the primary characteristics of alkalic-type epithermal gold (Au) deposits and provides an updated descriptive model. These deposits, primarily of Mesozoic to Neogene age, are among the largest epithermal gold deposits in the world. Considered a subset of low-sulfidation epithermal deposits, they are spatially and …
It is a quartz vein-type gold deposit in the southern end of the Qixia-Penglai ore belt. In order to explore the source and properties of ore-forming fluids and materials in the Panzijian gold deposit, explore the ore-forming process and reveal the genesis of the deposit, this work has carried out petrographic observation and temperature ...
There are many types of gold deposits, including epithermal vein deposits, intrusion-related breccia pipes, mesothermal turbidite, greenstone-hosted deposits, contact …
The Jiaodong gold deposits are different from orogenic and intrusion-related gold deposits in terms of the tectonic background, types of host rocks, and ore-forming mechanism. These gold deposits show close spatial-temporal and genetic relationships to mafic igneous rocks, implying the derivation of ore-forming fluids from the metasomatic ...
Carlin-type Au deposits in Guizhou Province, China, have similarities to and differences from the Carlin-type Au deposits in Nevada, USA. The Shuiyindong and Jinfeng deposits, located in the Guizhou Province of southern China, are compared with the Getchell and Cortez Hills Carlin-type Au deposits of Nevada in terms of ore paragenesis and pyrite …
Gold is present as minute flakes of native gold. This type of environment (i.e., around and above an intrusive body) is also favourable for the formation of other types of deposits—particularly vein-type gold deposits (a.k.a. epithermal deposits). Some of the gold deposits of British Columbia (such as in the Eskay Creek area adjacent to the ...
As an introduction to this compilation of the world's major gold deposits and provinces, this paper provides a thumbnail sketch of each gold deposit type, including geologic and economic characteristics and widely accepted genetic models, as well as briefly …
Carlin-type gold deposits are one of the most important gold mineralization styles in the world. Despite their economic importance and the large volume of work that has been published, there remain crucial questions regarding their metallogenesis. Much of this uncertainty is due to the cryptic nature of the gold occurrence, with gold occurring ...
The Carlin-type gold deposits in Nevada make up one of the largest gold districts in the world (Cline et al., 2005).These deposits contain an endowment of ~255 Moz (7,931 tonnes) of gold, of which 89% occurs in four main clusters of deposits, including the Carlin trend, Getchell, Cortez, and Jerritt Canyon (Muntean, 2018).The deposits occur along …
Sediment-hosted gold deposits are recognized in the Great Basin province of the western United States and in China along with a few recognized deposits in Indonesia, Iran, and Malaysia. ... increased sulfide minerals in the Chinese subtype and decalcification alteration dominant in the Carlin type. We therefore recommend using the appropriate ...
The Triassic gold deposits of the Youjiang Basin, southern China, have been variously correlated to Carlin-style and orogenic gold deposits or classified as a new intermediate deposit type.
The Xiejiagou gold deposit located in the Zhaoyuan-Laizhou gold belt is composed of altered-rock-type gold mineralization and superposed auriferous quartz veins, showing unique two-stage gold ...
Carlin-type deposits are major sources of gold, yet their origins are enigmatic. Suggested genetic models make connections to magmatism, regional metamorphism, or regional extension. Depositional mechanisms are uncertain as well. We propose on the basis of geologic, physical, and chemical reasoning, a genetic model in which meteoric fluids …
Sixteen common types of bedrock gold deposits are distinguished from one another and their main geological attributes are summarized. Many of these deposit types represent …
Table 1, thirteen globally significant types of gold deposits are presently recognized, each with its own well-defined characteristics and environments of formation. Minor types of gold deposits are not discussed in this paper. As proposed by Robert et al. (1997) and Poulsen et al. (2000), many of these gold deposit types can
However, China is now recognized as possessing significant gold resources in a wide range of mineral deposit types. Present estimates of gold resources in China exceed 4,500 t, which comprise 60% in gold-only deposits, more than 25% in base metal-rich skarn, porphyry, and vein deposits, and more than 10% in placer accumulations.
Such deposits are thus the largest, single genetic type of deposit for providing gold. Nevertheless, as a genetic class, their formation remains a matter of debate (Tomkins Citation 2013a). The main reason for this debate lies in their depth of formation in the crust, which is interpreted to be >4 km (Goldfarb et al. Citation 2005 – Figure 1).
Gold deposits are formed by a wide range of geological processes, and according to the US Geological Survey, they generally fall into two categories: lode deposits and placer …
The Garrcon gold deposit (20.6 million tonnes of ore containing 636,000 oz Au 31) is located in the Garrison camp near the provincial border between Ontario and Quebec within a transtensional ...
Sixteen common types of bedrock gold deposits are distinguished from one another and their main geological attributes are summarized. Many of these deposit types represent different components of larger hydrothermal systems active at the same crustal levels and are genetically related. The geochemical parameters for most of deposit types are the
well as the Witwatersrand-type gold deposits, which are more than adequately reviewed in recent literature (Frimmel et al., 2005; Law and Phillips, 2005). Exploration is mainly preoccupied with defining the footprints of known gold deposits and with integrating various techniques with geology for their efficient identification and detection.
Determining the mineralization ages of the Carlin-type gold deposits is integral to elucidate their links to associated geological events and to develop a suitable genetic model for these important deposits (Chakurian et al., 2003).However, dating of Carlin-type gold deposits is always a challenge as few suitable ore-stage minerals can be used for conventional …
Carlin-type gold deposits contain "invisible" or microscopic particles of gold that are deposited within a mineral called pyrite in sedimentary rocks. Needless to say, these deposits are named ...
esis of Carlin-type Au deposits results from the fact that within some of the districts and trends and at other locations in Nevada, there are sedimentary rock-hosted disseminated Au deposits that have some attributes in common with, and other features that are distinct from, Carlin-type deposits (e.g., Hofstra and Cline, 2000; Hofstra, 2002).