Geology and geochronology of the Lalingzaohuo cobalt-bearing copper
As a Co mineralization potential region, EKOB is an ideal focus for studying the cobalt-bearing skarn deposits. The Lalingzaohuo Cu polymetallic deposit adjacent to the Xiarihamu deposit in the EKOB is a cobalt-bearing skarn deposit (Figs. 1 b, 2; Chen et al., 2013, Wang et al., 2022b).The Lalingzaohuo deposit contains preliminary proven …
Skarn Deposits | Seventy-Fifth Anniversary Volume
Skarn that replaces limestone largely consists of Fe-Ca silicates such as andradite and hedenbergite and is termed calcic skarn. Skarn deposits, on the other hand, are best …
(PDF) Mineralogy of the Panulcillo skarn copper deposit, Coquimbo
The Panulcillo skarn copper deposit developed in an Early Cretaceous (Valanginian) volcano-sedimentary sequence intruded by a Cretaceous diorite. The exoskarn zone of the deposit is composed of ...
Skarn Deposits | Geology of Canadian Mineral Deposit …
The term "skarn" some Swedish iron ores of this type (Geijer and Magnusson, 1952). It is not normally used for skarn-type mineral assemblages produced by regional metamorphism of pre-existing deposits, for example highly metamorphosed lithofades of iron-formation (Gross, 1968; "Skarn iron", subtype 20.4).
SKARN AND SKARN DEPOSITS: A GUIDE TO THE …
Grade of the skarn deposits ranges from 1% to 35%, and predominantly 15%, while that of Au and Ag are measured in g/t. ... Copper grades in Pb-Zn skarn deposits are . generally < 0.2 %. 1 8 ...
The Hydrothermal Evolution of the Alvo Açaí Cu (Au, Mo) Skarn Deposit …
The Alvo Açaí Cu (Au, Mo) skarn deposit forms part of several poorly explored copper deposits in the western sector of the Carajás province in Brazil. Here, a 2.86 Ga metasyenogranitic basement and a 2.71 Ga quartzite of the Liberdade Group are crosscut by diabase and granitic pegmatite dikes in the deposit area.
Tracing the genesis of the Zhibula skarn deposit, Tibet, …
The Gangdese metallogenic belt is known for several large to giant porphyry Cu-Mo deposits (Tafti et al., 2014, Zhao et al., 2014, Zhao et al., 2016, Yang et al., 2020) and numerous coeval skarn deposits (such as Jiama and Zhibula; Li et al., 2005, Zheng et al., 2016).In addition, Cu polymetallic skarn deposits have recently been reported with …
Skarn mineralization associated with the Cadia porphyry …
Skarn mineralization associated with the Cadia porphyry gold-copper deposit, NSW, Australia David B. Forster and Philip K. Seccombe* School of Geosciences, The University of Newcastle, Callaghan NSW, Australia 2308 [email protected] The Cadia deposits, located near Orange NSW, are among several examples of Ordovician, high …
All about skarns
The reduced skarn mineralogy reflects the reduced nature of the associated Copper Canyon granodiorite [Fe 2 O 3 /( Fe 2 O 3 +FeO) < 0.5] that is quite distinct …
Skarn Deposits – Our Largest Source of Tungsten
The Kamaishi mine is typical of iron-copper skarn deposits in Japan and includes the largest iron skarn orebody in Japan, the Shinyama, measuring 400m long by 80m wide and stretching over half a kilometre deep. Of course, no discussion of skarns would be completed without reference to the large tin ...
9.3.2: Hydrothermal Ore Deposits
9.3.2.2 Skarn Deposits Figure 9.85: Underground mining in the Cantung Mine in Canada's Northwest Territories. As described in Chapter 8, skarns are contact metamorphic zones that develop around an intrusion. They may be thin or thick, and their formation often involves metasomatism.
Skarn Deposits
Skarn deposits represent a very diverse class in terms of geologic setting and ore metals. They constitute the world's premier sources of tungsten (more than 70% world's tungsten production); major sources of copper; important sources of iron, molybdenum and zinc; and minor sources of cobalt, gold, silver, lead, bismuth, tin, beryllium, rare earth elements, …
Rapid Formation of Porphyry and Skarn Copper-Gold …
The Ok Tedi copper-gold mine in Western Province, Papua New Guinea, is situated in the western part of the Ok Tedi Complex where monzodiorite to quartz monzonite intrusions are associated with porphyry- …
Geology of the Datuanshan copper deposit
With regard to ore fabrics, mineralogical assemblages, and crosscutting relationships, the mineralization of the Datuanshan stratabound skarn copper deposit can be divided into the following stages (Cao et al. 2015): (1) a skarn stage, (2) a quartz–sulfide stage, and (3) a carbonate stage. The skarn stage represents the earliest …
Gold Skarn Deposits—Geology and Exploration Criteria
About 10 6 kg (>30 Moz) of gold have been recovered from skarn deposits. These occurrences can be subdivided into five major skarn types: gold, iron, copper, porphyry copper, and lead-zinc. Each skarn type has distinctive characteristics and can be differentiated on the basis of geochemistry, mineralogy, pedogenesis, and tectonic setting.
World Skarn Deposits | One Hundredth Anniversary Volume
Skarn deposits are one of the more abundant ore types in the earth's crust and form in rocks of almost all ages. Skarn is a relatively simple rock type defined by a mineralogy usually dominated by calcsilicate minerals such as garnet and pyroxene. ... Copper skarn mineralogy is dominated by andraditic garnet. Most Zn skarns occur …
(PDF) Mineral Deposits of China
On the cover: The site of the giant 16 Ma Qulong porphyry Cu-Mo deposit in the Gangdese copper belt, Tibet, ... 6 Skarn Deposits of China . 7 Epithermal Gold Deposits of China—An Overview .
The Geology of the Antamina Copper-Zinc Skarn Deposit, Peru …
Antamina, the world's largest known skarn deposit of copper and zinc, is located in the eastern part of the Western Cordillera of north Peru at 9° 32' south and 77° 03' west, at an ...
Magmatic Processes of Granitoids in the Hongniu-Hongshan Porphyry-Skarn
The Hongniu-Hongshan is a typical porphyry-skarn copper deposit located in the Zhongdian district. This deposit covers a total area of 24 km 2 and has a proven reserve of 1.4 Mt copper and 40 Kt molybdenum . Its ore-related intrusions are primarily made up of granitic rocks [13,14,15,16,17,18]. The limestone, siltstone, and slate of the …
Reconstructing fluid evolution and precipitation mechanism …
Skarn deposit is one of the main sources of copper production (Meinert et al., 2005, Chang et al., 2019), so it is an important exploration target for copper …
The orientation of intra-arc crustal fault systems influences …
Some of the largest magmatic-hydrothermal copper ore deposits and deposit clusters are associated with arc-oblique fault systems. Whether this structural context …
Carbonate Replacement Deposits (CRDs)
Comparisons with Other Deposit Types. 1. Porphyry Copper Deposits: Contrast: Porphyry copper deposits are primarily associated with magmatic intrusions and are characterized by disseminated mineralization in large volumes of host rock. In contrast, CRDs are typically hosted in carbonate rocks and result from the replacement of original …
Geology of the World-Class Antamina Copper-Zinc Skarn Deposit…
Deposit Geology. Antamina (3 km long by 1.5 km wide in the northeast direction) is a skarn deposit with copper/zinc, silver, molybdenum, and bismuth formed after the intrusion of quartz monzonite into carbonate-rich sedimentary rocks (limestones and marls) (Figure 2). Consistent mineral zonation is controlled by stratigraphic and …
Detection of alteration zones using hyperspectral remote sensing …
The Kuluketage block, located in the northeastern Tarim Craton, is one of the largest Precambrian blocks in Xinjiang Uygur autonomous region (Fig. 1) [11], [16], [17].The Dapingliang copper deposit was discovered in the eastern portion of the Kuluketage block over a decade ago [10] and geologic studies showed that it is a skarn deposit [10], [11]. ...
Skarn Deposits | Seventy-Fifth Anniversary Volume
Skarn deposits are among the most abundant and variable of all types of mineral deposits; yet, in spite of their diversity, they exhibit systematic geologic, petrologic, and mineralogic features which permit classification and detailed investigation. ... larger Cu skarns associated with altered and mineralized porphyry copper stocks and ...
Re-Os dating of molybdenite from the Kafang skarn copper (tin) deposit
The Gejiu tin polymetallic ore district is a famous tin polymetallic ore producing area in Yunnan Province. The Kafang skarn copper (tin) deposit is one of important mineral deposits of the Gejiu region. Re-Os dating of five molybdenite separated from the Kafang skarn ore bodies gives an isochron age of 83.4 ± 2.1Ma and model age …
Petrogenesis of granitoids in the Dewulu skarn copper deposit
The Tethyan tectonic domain hosts numerous world-class mineral deposits. Among these, the Dewulu skarn copper deposit in Western Qinling, China belongs to the Paleotethys ore belt. The skarn and orebodies here occur as stratoids or lenses at the contact between the Triassic Dewulu intrusive complex and Permian marine clastic and …
Geology, geochronology, and exploration of the Jiama giant …
The Jiama deposit is mainly controlled by the Jiama-Kajunguo thrust system (Zhong KH et al., 2012), which primarily refers to the "contracting" folds extending from north to south within the Jiama project and plays a crucial role in the formation of the No. 1 skarn orebody in Jiama.The Copper Mountain slip fault is an important part of the entire …
The Fluid Evolution in the Skarn Stages of the Baoshan Skarn …
Baoshan is a world-class skarn Cu-polymetallic deposit located at the junction of the Nanling and Qin-Hang metallogenic belts in China. While there has been …
Copper skarn mineralization related to reduced …
Copper skarns are the world's most abundant skarn type and represent one of the most important sources of Cu worldwide (Meinert et al., 2005).They are common in oceanic and continental subduction and intracontinental extensional settings (Meinert et al., 2005; Li et al., 2008; Xie et al., 2015, 2019; Pirajno and Zhou, 2015; Chang et al., …