scholarly journals PETROGRAPHIC CHARACTERISTICS AND ZIRCON U-PB GEOCHRONOLOGY OF GRANITOID ROCKS IN THE SOUTHERN BÊN GIANG, QUNG NAM PROVINCE

2011 ◽  
Vol 14 (4) ◽  
pp. 17-30 ◽  
Author(s):  
Sang Quang Dinh
Keyword(s):  
Inductively Coupled Plasma ◽  
Ductile Deformation ◽  
Large Area ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Minimum Age ◽  
Geologic Maps ◽  
Granitoid Rocks ◽  
Early Palaeozoic ◽  
The Individual

The early Palaeozoic calc-alkaline granitoid association in south Nam Giang town is forming large area reaching hundreds of km2, along the east – west ductile deformation zones, which is studied in detail in diffirent geologic maps scales by the geologists (Huynh Trung and Nguyen Xuan Bao, 1981 at 1:500,000 scale or Nguyen Van Trang et al, 1986, at 1:200,000 scale). The six samples were studied in details, which are composed mainly quartz diorite and granodiorite. The samples were crushed and large zircons were extracted. The laser ablation microprobe-inductively coupled plasma mass spectrometer (LA-ICP MS) U-Pb zircon dating was carried out by standard methods at CODES, University of Tasmania-Australia. In-situ zircon U–Pb geochronology was conducted on six samples of age between 306 Ma and 278 Ma. A total of seventytwo zircons were analysed and the results exist a narrow spread in individual zircon ages between ca. 269 and 313 Ma, with significant form a coherent single age suite of 295 Ma (early Permian). As the six samples are all assigned to the same granitic suite, I have combined the individual isotopic data yields a weighted mean age from 72 analyses of 294 Ma, which represents the minimum age for the crystallisation of the south Ben Giang granite.

scholarly journals Geochemical characterisation of Otumba obsidian sub-sources (Central Mexico) by inductively coupled plasma mass spectrometry and density-based spatial clustering of applications with noise statistical analysis

2013 ◽  
Vol 1 (1) ◽  
pp. 18 ◽  
Author(s):  
Denisse Argote-Espino ◽  
Jesús Solé ◽  
Pedro López-García ◽  
Osvaldo Sterpone
Keyword(s):  
Mass Spectrometry ◽  
Inductively Coupled Plasma ◽  
Spatial Clustering ◽  
Central Mexico ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Lithic Industry ◽  
Plasma Mass Spectrometry ◽  
The One ◽  
The Individual

Several obsidian sources that were significant to the lithic industry all over Mesoamerica are contained in the Central Mexico highlands. Many archaeological investigations have suggested that the economical and political expansion of important Mesoamerican cultures was related to the control of obsidian sources and its commercial routes. One of these sources was Otumba, located west of the Teotihuacan Valley. This region has several sub-sources, some of which have been studied in more detail than others. The most studied subsource is the one located on Soltepec Hill, but other related sub-sources within Otumba region that have not been studied include the Ixtete, Pacheco, Malpais and Tepayo domes. We have analysed samples from these four sub-sources with inductively coupled plasma mass spectrometry (ICP-MS) method to determine their chemical similarities and differences and classify them. The individual correlation of different archaeological artifacts with each sub-source could tell us about exploitation preferences of the diverse cultures controlling the source or even sequence in time of its utilisation.

scholarly journals Petrographic characteristics and zircon UPb geochronology of granitogneiss rocks in the Chu Lai - Kham Duc area (Quang Nam province)

2018 ◽  
Vol 1 (6) ◽  
pp. 258-272 ◽  
Author(s):  
Sang Quang Dinh
Keyword(s):  
Fault Zone ◽  
Late Ordovician ◽  
Ductile Deformation ◽  
Large Area ◽  
Biotite Gneiss ◽  
Geologic Maps ◽  
Early Palaeozoic ◽  
East West

The early Palaeozoic granitogneiss association in the Chu Lai - Kham Duc area (Quang Nam) is a large area of hundreds of km2, along southern of the East – West ductile deformation zones (Tam Ky – Phuoc Son fault zone), which is studied in detail in different geologic maps scales by the geologists, which is named Chu Lai complex. The five samples studied in detail are composed mainly of granitogneiss and biotite gneiss from the Chu Lai - Kham Duc area. The samples were crushed and large zircons were extracted. The in-situ zircon U–Pb geochronology was conducted on five samples (60 zircons in total) of age between 444 Ma and 426 Ma. These ages indicated the prolonged magmatic – tectonic period between the late Ordovician and middle Silurian in Kon Tum massif.

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>

Fast Turn-around Failure Analysis of Metal Interconnection Using FIB and LA ICP-MS

2010 ◽  
Author(s):  
Zixiao Pan ◽  
Wei Wei ◽  
Fuhe Li
Keyword(s):  
Failure Analysis ◽  
Inductively Coupled Plasma ◽  
Structural Damage ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Detection Sensitivity ◽  
Chemical Contamination ◽  
Inductively Coupled ◽  
Minimal Sample ◽  
Icp Ms

Abstract This paper introduces our effort in failure analysis of a 200 nm thick metal interconnection on a glass substrate and covered with a passivation layer. Structural damage in localized areas of the metal interconnections was observed with the aid of focused ion beam (FIB) cross-sectioning. Laser ablation inductively coupled plasma mass spectroscopy (LA ICP-MS) was then applied to the problematic areas on the interconnection for chemical survey. LA ICP-MS showed direct evidence of localized chemical contamination, which has likely led to corrosion (or over-etching) of the metal interconnection and the assembly failure. Due to the high detection sensitivity of LA ICP-MS and its compatibility with insulating material analysis, minimal sample preparation is required. As a result, the combination of FIB and LA ICP-MS enabled successful meso-scale failure analysis with fast turnaround and reasonable cost.

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