scholarly journals The discovery adakitic rock along the Phan Si Pan zone in northwestern Vietnam and Cu-Au-Mo mineralization

2013 ◽  
Vol 16 (2) ◽  
pp. 5-15
Author(s):  
Hieu Trung Pham
Keyword(s):  
Theoretical Basis ◽  
Porphyry Copper ◽  
Mineral Resources ◽  
Epithermal Deposit ◽  
Porphyry Copper Deposits ◽  
Rock Types ◽  
Icp Ms ◽  
Close Relationship ◽  
Plasma Mass Spectrometry ◽  
Type Granite

Recent work shows that there is a close relationship between adakite and Cu-Cu-Mo epithermal deposit and porphyry copper deposits. We discovered that adakiticss exist in the northwest of VN. Previous studies indicated that its belonged to A type or I type granite. The laser-plasma mass spectrometry (LA-ICP-MS) was used for the zircon U-Pb dating of adakitic in Phan Si Pan zone and the isotope age was obtained to be 38-35 Ma, indicating an Eocene related to the stage of the India-Asia collision. This kind of rocks is represented by granite, and similar in chemical composition to the adakitics rock. In this study we introduce the basic rock types adakitics as well as discuss the existence of this type of research. The discovery may provide a theoretical basis for the prospecting and exploration of the above-mentioned mineral resources in the Phan Si Pan zone in northwestern Vietnam.

scholarly journals Trace-element geochemistry of molybdenite from porphyry Cu deposits of the Birgilda-Tomino ore cluster (South Urals, Russia)

2018 ◽  
Vol 82 (S1) ◽  
pp. S281-S306 ◽  
Author(s):  
Olga Y. Plotinskaya ◽  
Vera D. Abramova ◽  
Elena O. Groznova ◽  
Svetlana G. Tessalina ◽  
Reimar Seltmann ◽  
...  
Keyword(s):  
Trace Element ◽  
Inductively Coupled Plasma ◽  
Porphyry Copper ◽  
Mass Spectrometry Data ◽  
South Urals ◽  
Trace Element Geochemistry ◽  
Porphyry Copper Deposits ◽  
Element Geochemistry ◽  
Inductively Coupled ◽  
Plasma Mass Spectrometry

ABSTRACTMineralogical, electron microprobe analysis and laser ablation-inductively coupled plasma-mass spectrometry data from molybdenite within two porphyry copper deposits (Kalinovskoe and Birgilda) of the Birgilda-Tomino ore cluster (South Urals) are presented.† The results provide evidence that molybdenites from these two sites have similar trace-element chemistry. Most trace elements (Si, Fe, Co, Cu, Zn, Ag, Sb, Te, Pb, Bi, Au, As and Se) form mineral inclusions within molybdenite. The Re contents in molybdenite vary from 8.7 ppm to 1.13 wt.%. The Re distribution within single molybdenite flakes is always extremely heterogeneous. It is argued that a temperature decrease favours the formation of Re-rich molybdenite. The high Re content of molybdenite observed points to a mantle-derived source.

scholarly journals Hair Mercury Levels Detection in Fishermen from Sicily (Italy) by ICP-MS Method after Microwave-Assisted Digestion

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
Giuseppe Giangrosso ◽  
Gaetano Cammilleri ◽  
Andrea Macaluso ◽  
Antonio Vella ◽  
Nicolantonio D’Orazio ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
Total Mercury ◽  
Control Group ◽  
Inductively Coupled ◽  
Hair Mercury ◽  
Icp Ms ◽  
Hair Samples ◽  
Significant Difference ◽  
Close Relationship ◽  
Plasma Mass Spectrometry

A number of ninety-six hair samples from Sicilian fishermen were examined for total mercury detection by an Inductively Coupled Plasma Mass Spectrometry (ICP-MS) method. The mercury levels obtained were compared with mercury levels of 96 hair samples from a control group, in order to assess potential exposure to heavy metals of Sicilian fishermen due to fish consumption and closeness to industrial activities. Furthermore, the mercury levels obtained from hair samples were sorted by sampling area in order to verify the possible risks linked to the different locations. The overall mean concentration in the hair of the population of fishermen was6.45±7.03 μg g−1, with a highest value in a fisherman of Sciacca (16.48 μg g−1). Hair mercury concentration in fishermen group was significantly higher than in control group (p<0.01). There was no significant difference in hair total mercury concentrations between sampling areas (p>0.05). The results of this study indicate a greater risk of exposure to mercury in Sicilian fishermen, in comparison to the control population, due to the high consumption of fish and the close relationship with sources of exposure (ports, dumps, etc.).

scholarly journals Geochemical and Geochronological Constraints on a Granitoid Containing the Largest Indosinian Tungsten (W) Deposit in South China (SC): Petrogenesis and Implications

Minerals ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 80
Author(s):  
Jinhua Qin ◽  
Denghong Wang ◽  
Yuchuan Chen
Keyword(s):  
Trace Elements ◽  
South China ◽  
Phase Iii ◽  
Fractionation Process ◽  
Fine Grained ◽  
Icp Ms ◽  
Metamorphic Basement ◽  
Close Relationship ◽  
Type Granite ◽  
Geochronological Constraints

Chuankou tungsten (W) ore field, with an estimated WO3 reserve exceeding 300,000 tonnes, is so far the largest Indosinian (Triassic) granite-related W ore field in South China. However, the precise emplacement ages, sources of granitoids, and their relationship with W mineralization are still not well understood. In this research, four main magmatic stages (G-1 to G-4) have been identified in the Chuankou ore field, including G-1 (phase I, biotite monzogranite), G-2 (phase II, two-mica monzogranite), G-3 (phase III, fine-grained granite), and G-4 (phase IV, granite porphyry). LA-ICP-MS U-Pb dating of zircon grains from granitoids of the Chuankou W ore field yields emplacement ages of 230.8 ± 1.6 Ma, 222.1 ± 0.56 Ma, 203.1 ± 1.6 Ma, and 135.5 ± 2.4 Ma, respectively. Granitoids from the Chuankou ore field contain a large amount of peraluminous minerals such as biotite, musvite, garnet and tourmaline. Geochemically, the granitoids have high Si and Al (A/CNK > 1.1) content but low alkali, Fe, Mg, Mn, and Ca content. Moreover, there is enrichment of Rb, Zr, Hf, Th, and U, but depletions of Ba, Sr, P, and Ti. The granitoids have especially low Zr + Nb + Ce + Y and high Rb/Ba ratios, further indicating a highly fractionated S-type granite affinity with a significant crystal fractionation process in regard to K-feldspar, plagioclase, biotite, Ti-bearing minerals (except rutile), zircon, apatite, allanite, and monazite. Whole-rock εNd(t) and TDM2 values are −10.77 and 2090 Ma for G-1, −9.09 to −7.47 and 1764–1684 Ma for G-2, −10.07 to −6.53 and 1669–1471 Ma for G-3, respectively, indicating that the Chuankou granitoids were derived from two episodes of partial melting of the Paleoproterozoic to Mesoproterozoic metamorphic basement. Trace elements within the zircons and whole-rock geochemistry yielded evidence of the close relationship between W mineralization and G-1 and G-2 granitoids of the Chuankou ore field. The batholith of the Chuankou ore field was formed 20–10 Ma later than the peak age of the collisions orogeny and formed in a post-collisional setting.

Single Particle Inductively Coupled Plasma Mass Spectrometry: Investigating Nonlinear Response Observed in Pulse Counting Mode and Extending the Linear Dynamic Range by Compensating for Dead Time Related Count Losses on a Microsecond Timescale

2019 ◽  
Author(s):  
Ingo Strenge ◽  
Carsten Engelhard
Keyword(s):  
Mass Spectrometry ◽  
Inductively Coupled Plasma ◽  
Nonlinear Response ◽  
Dynamic Range ◽  
Dead Time ◽  
Inorganic Nanoparticles ◽  
Linear Dynamic Range ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Plasma Mass Spectrometry

<p>The article demonstrates the importance of using a suitable approach to compensate for dead time relate count losses (a certain measurement artefact) whenever short, but potentially strong transient signals are to be analysed using inductively coupled plasma mass spectrometry (ICP-MS). Findings strongly support the theory that inadequate time resolution, and therefore insufficient compensation for these count losses, is one of the main reasons for size underestimation observed when analysing inorganic nanoparticles using ICP-MS, a topic still controversially discussed.</p>

Sign in / Sign up

Export Citation Format

Share Document