New Insights into the Origin of the World-Class Jinding Sediment-Hosted Zn-Pb Deposit, Southwestern China: Evidence from LA-ICP-MS Analysis of Individual Fluid Inclusions

2021 ◽  
Author(s):  
Lan Mu ◽  
Ruizhong Hu ◽  
Xianwu Bi ◽  
Yongyong Tang ◽  
Tingguang Lan ◽  
...  
Keyword(s):  
Fluid Inclusions ◽  
Southwest China ◽  
Critical Role ◽  
Previous Suggestion ◽  
Inductively Coupled ◽  
Icp Ms ◽  
The World ◽  
World Class ◽  
Homogenization Temperatures ◽  
Very High

Abstract The Jinding deposit in the Lanping basin, southwest China, is the largest sandstone-hosted Zn deposit in the world and the second largest Zn-Pb deposit in China. However, questions related to the metal compositions and origin of the ore fluids remain. In this study, microthermometry and laser ablation-inductively coupled plasmamass spectrometry (LA-ICP-MS) were employed to determine the properties and compositions of individual fluid inclusions trapped in sphalerite and calcite. The results show that the fluid inclusions trapped in sphalerite and calcite have similar homogenization temperatures (79°–173°C with the majority 100°–130°C), salinities (10.3–29.1 wt % NaCl + CaCl2 equiv with the majority 24.5–27.4 wt % NaCl + CaCl2 equiv), and concentrations of alkali and alkali earth elements (e.g., Na, Ca, Mg, K, Sr, Ba, Li, Rb, and Cs). However, the concentrations of ore and associated metals (e.g., Pb, Sb, Ag, and Tl) in the fluid inclusions hosted by sphalerite are significantly higher than those hosted by calcite. Based on these observations, we propose that the sulfides including sphalerite were precipitated from a low-temperature, high-salinity, Ca-rich, metal-rich fluid, while the gangue minerals such as calcite crystallized subsequently from fluids depleted in metals due to prior precipitation of sulfides, and that the high salinities of the fluid inclusions are likely due to a combination of seawater evaporation and subsequent dissolution of evaporitic sequences during fluid percolation. The LA-ICP-MS analyses reveal that the fluid inclusions have K/Na, Rb/Na, and Cs/Na ratios within the range of modern basinal brines, and Li/Na, Ba/Na, and Ca/Na ratios share similar compositions with the ore fluids of basement interacted deposits in the world. The Jinding ore fluids contain ~200 to 650 ppm Pb, based on the data of fluid inclusions trapped in sphalerite. The estimated concentrations of Zn in the ore fluids are also very high at ~200 to 6,500 ppm. Our results reveal that anomalously metal rich fluids played a critical role in the formation of the giant Jinding sediment-hosted Pb-Zn deposit. We concur with the previous suggestion that sulfide precipitation at Jinding occurred when ascending metal-rich brines encountered an H2S-rich, Ca-rich fluid, which was produced by interaction of hydrocarbons with evaporites, in the cap of the Jinding dome.

scholarly journals LA-ICP-MS analysis of fluid inclusions: contamination effects challenging micro-analysis of elements close to their detection limit

2017 ◽  
Vol 32 (5) ◽  
pp. 1052-1063 ◽  
Author(s):  
Katerina Schlöglova ◽  
Markus Wälle ◽  
Christoph A. Heinrich
Keyword(s):  
Mass Spectrometry ◽  
Fluid Inclusions ◽  
Inductively Coupled Plasma ◽  
Analytical Procedure ◽  
Inductively Coupled ◽  
Natural Minerals ◽  
Icp Ms ◽  
Plasma Mass Spectrometry ◽  
Reliable Quantification ◽  
Micro Analysis

This paper presents a practical guide to an optimized analytical procedure for the reliable quantification of trace element concentrations in fluid inclusions hosted by natural minerals, using laser ablation inductively coupled plasma mass spectrometry (ICP-MS).

Information Technology as a Service

2011 ◽  
pp. 1-24 ◽  
Author(s):  
Robin G. Qiu
Keyword(s):  
Business Models ◽  
Critical Role ◽  
Enterprise Engineering ◽  
Service Computing ◽  
Interdisciplinary Field ◽  
Business Operations ◽  
The World ◽  
Service Oriented ◽  
World Class ◽  
Shift Gears

In this information era, both business and living communities are truly IT driven and service oriented. As the globalization of the world economy accelerates with the fast advance of networking and computing technologies, IT plays a more and more critical role in assuring real-time collaborations for delivering needs across the world. Nowadays, world-class enterprises are eagerly embracing service-led business models aimed at creating highly profitable service-oriented businesses. They take advantage of their own years of experience and unique marketing, engineering, and application expertise and shift gears toward creating superior outcomes to best meet their customers’ needs in order to stay competitive. IT has been considered as one of the high-value services areas. In this chapter, the discussion will focus on IT as a service. We present IT development, research, and outsourcing as a knowledge service; on the other hand, we argue that IT as a service helps enterprises align their business operations, workforce, and technologies to maximize their profits by continuously improving their performance. Numerous research and development aspects of service-enterprise engineering from a business perspective will be briefly explored, and then computing methodologies and technologies to enable adaptive enterprise service computing in support of service-enterprise engineering will be simply studied and analyzed. Finally, future development and research avenues in this emerging interdisciplinary field will also be highlighted.

Information Technology as a Service

2009 ◽  
pp. 261-278
Author(s):  
Robin G. Qiu
Keyword(s):  
Business Models ◽  
Critical Role ◽  
Enterprise Engineering ◽  
Service Computing ◽  
Interdisciplinary Field ◽  
Business Operations ◽  
The World ◽  
Service Oriented ◽  
World Class ◽  
Shift Gears

In this information era, both business and living communities are truly IT driven and service oriented. As the globalization of the world economy accelerates with the fast advance of networking and computing technologies, IT plays a more and more critical role in assuring real-time collaborations for delivering needs across the world. Nowadays, world-class enterprises are eagerly embracing service-led business models aimed at creating highly profitable service-oriented businesses. They take advantage of their own years of experience and unique marketing, engineering, and application expertise and shift gears toward creating superior outcomes to best meet their customers’ needs in order to stay competitive. IT has been considered as one of the high-value services areas. In this chapter, the discussion will focus on IT as a service. We present IT development, research, and outsourcing as a knowledge service; on the other hand, we argue that IT as a service helps enterprises align their business operations, workforce, and technologies to maximize their profits by continuously improving their performance. Numerous research and development aspects of service-enterprise engineering from a business perspective will be briefly explored, and then computing methodologies and technologies to enable adaptive enterprise service computing in support of service-enterprise engineering will be simply studied and analyzed. Finally, future development and research avenues in this emerging interdisciplinary field will also be highlighted.

The world-class Natalka gold deposit, northeast Russia: REE patterns, fluid inclusions, stable oxygen isotopes, and formation conditions of ore

2008 ◽  
Vol 50 (5) ◽  
pp. 362-390 ◽  
Author(s):  
N. A. Goryachev ◽  
O. V. Vikent’eva ◽  
N. S. Bortnikov ◽  
V. Yu. Prokof’ev ◽  
V. A. Alpatov ◽  
...  
Keyword(s):  
Gold Deposit ◽  
Oxygen Isotopes ◽  
Fluid Inclusions ◽  
Stable Oxygen Isotopes ◽  
Northeast Russia ◽  
The World ◽  
World Class ◽  
Stable Oxygen ◽  
Formation Conditions ◽  
Ree Patterns

Development of a laser ablation ICP-MS method for the analysis of fluid inclusions associated with volcanogenic massive sulfide deposits

2021 ◽  
pp. geochem2020-043
Author(s):  
Madison A. Schmidt ◽  
Matthew I. Leybourne ◽  
Jan M. Peter ◽  
Duane C. Petts ◽  
Simon E. Jackson ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Fluid Inclusions ◽  
Inductively Coupled Plasma ◽  
Massive Sulfide ◽  
Ore Deposits ◽  
Volcanogenic Massive Sulfide ◽  
Metals And Metalloids ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Vms Deposits

There is increasing acceptance of the presence of variable magmatic contributions to the mineralizing fluids in the formation of volcanogenic massive sulfide (VMS) deposits. The world-class Windy Craggy Cu-Co-Au deposit (>300 MT @ 2.12 wt.% Cu) in northwestern British Columbia is of interest because, unlike most VMS deposits, quarts fluid inclusions from within the deposit range from relatively low to intermediate salinity (most 6-16 wt.% equivalent). In this study we used an excimer (193 nm) laser ablation system interfaced to a quadrupole inductively coupled plasma mass spectrometer to quantify key metals and metalloids that are considered by many to be indicative of magmatic contributions to hydrothermal ore deposits. Although LA-ICP-MS signals from these low-salinity inclusions are highly transient, we were able to quantify Na, Mg, K, Ca, Mn, Fe, Co, Cu, Zn, Sr, Sn, Ba, Ce, Pb and Bi consistently – of the 34 elements that were monitored. Furthermore, Cl, Sb, Cd, Mo, Rb, Br, and As were also measured in a significant number of inclusions. Comparison of the fluid inclusion chemistry with unaltered and altered mafic volcanic and sedimentary rocks and mineralized samples from the deposit indicate that enrichment in the main ore metals (Cu, Zn, Fe, Pb) in the inclusions reflects that of the altered rocks and sulfides. Metals and metalloids that may indicate a magmatic contribution typically show much greater enrichments in the fluid inclusions much greater over the host rocks at the same Cu concentration; in particular Bi, Sn and Sb are significantly elevated when compared to the host rock samples. These data are consistent with the ore-forming fluids at Windy Craggy having a strong magmatic contribution.

scholarly journals LA-ICP-MS U–Pb Dating of Cenozoic Rutile Inclusions in the Yuanjiang Marble-Hosted Ruby Deposit, Ailao Shan Complex, Southwest China

Minerals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 433
Author(s):  
Tianjian Yang ◽  
Xiaoming Sun ◽  
Guiyong Shi ◽  
Ying Liu
Keyword(s):  
Southwest China ◽  
Mineral Deposits ◽  
Cooling History ◽  
Host Matrix ◽  
Icp Ms ◽  
Lateral Shearing ◽  
The World ◽  
History Of ◽  
Tectonic Belt

Among the marble-hosted ruby deposits in the Himalayan tectonic belt, which yields the highest-quality rubies in the world, the Yuanjiang deposit is the only economically viable one located in China. More attempts are necessary to put constraints on the ore-forming age of these marble-hosted ruby deposits. Here, we dated rutile inclusions in the Yuanjiang rubies using the LA-ICP-MS U–Pb method, which yielded a lower intercept 206Pb/238U age of 20.2 ± 1.2 Ma on the Tera-Wasserburg plot, close to the 22.5–22.2 Ma 40Ar/39Ar ages of phlogopite from the ruby host matrix assemblage. Our U–Pb rutile age put a constraint on the cooling history of the Yuanjiang rubies deposit. The new rutile age is consistent with our previous model that shows the ca. 28–22 Ma left lateral shearing plays an important role in transporting the ruby deposit toward the surface. This study provides the first example of in-situ U–Pb dating of rutile in the Himalayan tectonic belt, demonstrating the great potential of U–Pb rutile geochronology for Cenozoic mineral deposits.

A Study of Internal Standardization in Inductively Coupled Plasma-Mass Spectrometry

1987 ◽  
Vol 41 (5) ◽  
pp. 801-806 ◽  
Author(s):  
Joseph J. Thompson ◽  
R. S. Houk
Keyword(s):  
Mass Spectrometry ◽  
Inductively Coupled Plasma ◽  
Internal Standard ◽  
Operating Conditions ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Ionization Suppression ◽  
Plasma Mass Spectrometry ◽  
Internal Standardization ◽  
Very High

Internal standardization is employed to compensate for ionization suppression in inductively coupled plasma-mass spectrometry (ICP-MS). By examination of the response of over 50 elements to a sodium matrix under different operating conditions, it is apparent that an internal standard is most effective when it is close in mass and ionization energy to the analyte. The extent of suppression and the relative order of suppression of various analyte elements can differ for various matrix elements. Generally, precision was improved by the use of internal standardization; the extent of improvement differed for different analyte elements and operating conditions. A comparison between ICP-MS with ultrasonic and pneumatic nebulization is described. The ultrasonic nebulizer usually exhibits better sensitivity and detection limits for analyte elements, unless the extent of suppression induced by the concomitant matrix is very high.

scholarly journals Concentration of Gallium in the Permo-Carboniferous Coals of China

2009 ◽  
Vol 27 (5) ◽  
pp. 333-343 ◽  
Author(s):  
Cunliang Zhao ◽  
Shenjun Qin ◽  
Yinchao Yang ◽  
Yanheng Li ◽  
Mingyue Lin
Keyword(s):  
Inductively Coupled Plasma ◽  
Coal Seams ◽  
Ore Deposit ◽  
Inductively Coupled ◽  
Gallium Concentration ◽  
Icp Ms ◽  
Plasma Mass Spectrometry ◽  
Current Price ◽  
Different Sources ◽  
Very High

Gallium is widely used in electronic industry and its current price is about 500 US dollars pro kilogram. It has been found that its contents are very high in Permo-Carboniferous coal of China. In order to look for valuable associated gallium deposits in coal, gallium contents of 177 coal samples were determined by using inductively coupled plasma-mass spectrometry (ICP-MS) and the data of 873 coal samples from Chinese Permo-Carboniferous coalfields were collected. The results show that the average gallium concentration of Chinese Permo-Carboniferous coals is 15.49μg·g−1. There are two concentration types of gallium in Chinese Permo-Carboniferous coals: One type is that gallium has enriched to an ore deposit, and another type is that gallium is locally enriched in coal seams, but has not formed a valuable associated gallium ore deposit. The gallium concentration in Chinese Permo-Carboniferous coal may have several different sources: concentration in sedimentation stage, magmatic hydrothermal inputs and low-temperature hydrothermal fluids.

Sign in / Sign up

Export Citation Format

Share Document