A5051757076- Geological and Geochemical Analysis
- Geochemistry and Geologic Mapping
- earthquake and tectonic studies
- High-pressure geophysics and materials
- Geology and Paleoclimatology Research
- Pleistocene-Era Hominins and Archaeology
- Geological and Geophysical Studies
- Hydrocarbon exploration and reservoir analysis
- Paleontology and Stratigraphy of Fossils
- Drilling and Well Engineering
- Archaeology and ancient environmental studies
- Reservoir Engineering and Simulation Methods
- Isotope Analysis in Ecology
- Geochemistry and Elemental Analysis
- Geological Studies and Exploration
- Offshore Engineering and Technologies
- Laser-induced spectroscopy and plasma
- Radioactive element chemistry and processing
- Methane Hydrates and Related Phenomena
- Nuclear Physics and Applications
- Mass Spectrometry Techniques and Applications
- Analytical chemistry methods development
- Clay minerals and soil interactions
- Groundwater and Isotope Geochemistry
- Geological formations and processes
The University of Melbourne
2015-2024
University of Tasmania
2009
University of Bristol
2007
James Cook University
2007
Swedish Museum of Natural History
2007
Australian National University
1989-1997
The Open University
1991-1994
Iolite is a non-commercial software package developed to aid in the processing of inorganic mass spectrometric data, with strong emphasis on visualisation versus time acquisition. The goal provide powerful framework for data and interpretation, while giving users ability implement their own reduction protocols. It intended be highly interactive, providing user complete overview at all stages processing, allowing freedom change parameters reprocess any point. program presents variety windows...
Granitic plutonism is the principal agent of crustal differentiation, but linking granite emplacement to crust formation requires knowledge magmatic evolution, which notoriously difficult reconstruct from bulk rock compositions. We unlocked plutonic archive through hafnium (Hf) and oxygen (O) isotope analysis zoned zircon crystals classic hornblende-bearing (I-type) granites eastern Australia. This type forms by reworking sedimentary materials mantle-like magmas instead remelting ancient...
Elemental fractionation effects during analysis are the most significant impediment to obtaining precise and accurate U‐Pb ages by laser ablation ICPMS. Several methods have been proposed minimize degree of downhole fractionation, typically rastering or limiting acquisition relatively short intervals time, but these compromise minimum target size temporal resolution data. Alternatively, other developed which attempt correct for elemental fractionation. A common feature all techniques,...
There is a growing need for new zircon reference materials in situ Hf‐isotope analysis by laser ablation‐multicollector inductively coupled plasma‐mass spectrometry (LA‐MC‐ICP‐MS). In this contribution we document the results of preliminary investigation seven natural zircons, conducted order to test their suitability regard. Solution MC‐ICP‐MS data on separated Lu and Hf fractions provided compositional while ca. 750 LA‐MC‐ICP‐MS analyses allowed assessment potential micrometre‐scale...
Brachiopods are (perhaps all too) familiar to any geology student who has taken an invertebrate paleontology course; they may well be less biology students. Even though brachiopods among the most significant components of marine fossil ...Read More
Laser ablation ICP‐MS represents a promising new development for the acquisition of elemental and isotopic images from variety different materials. Compared to existing methods imaging, it offers relatively rapid throughput, very wide dynamic range, clean mass spectrum, utility at scales (from μm cm) multi‐element/isotopic capability. Although developing rapidly in biological sciences, method has not yet seen widespread application geological This contribution documents some preliminary...
Destructive plate margin magmas may be subdivided into two groups on the basis of their rare earth element (REE) ratios. Most island arc suites have low Ce/Yb, and remarkably restricted isotope ratios 87 Sr/ 86 Sr = 0.7033, 143 Nd/ 144 Nd 0.51302, 206 Pb/ 204 Pb 18.76 , 207 15.57, 208 38.4. However, they also Rb/Sr (0.03), Th/U (2.2) Ce/Yb (8.5) which are significantly less than accepted estimates for bulk continental crust. The high higher incompatible contents, more heavy REE, much...
In situ Sr-isotope analysis by laser ablation multi-collector ICP-MS is a potentially powerful tracer technique with widespread application to many fields of study. The usefulness the method, however, depends very strongly upon quality data that can be obtained (compared conventional 'solution-based' analyses), and spatial resolution, particularly in samples strong compositional zonation or fine-scale growth banding. this contribution we show highly accurate (∼50 ppm) precise (external...
The NIST glass certified reference materials, SRM 610‐617, have been widely adopted by the geological community as calibration samples for a variety of in situ trace element analytical techniques. There is now an urgent requirement similar materials isotopic We analysed 610, 612 and 614 their Pb, Sr Nd compositions using thermal ionisation mass spectrometry. Large differences composition were observed between each CRM, suggesting significant content initial starting material (base glass). As...
Journal Article Geochemical and Isotopic Constraints on the Origin of Jurassic Dolerites Tasmania Get access J. M. HERGT, HERGT 1Research School Earth Sciences, Australian National UniversityGPO Box 4, Canberra, A.C.T. 2601 Search for other works by this author on: Oxford Academic Google Scholar B. W. CHAPPELL, CHAPPELL 2Department Geology, University T. McCULLOCH, McCULLOCH I. McDOUGALL, McDOUGALL A. R. CHIVAS Petrology, Volume 30, Issue August 1989, Pages 841–883,...
Komatiites are products of decompression melting mantle so hot that they almost exclusively restricted to the Archean. The high degree partial ( F ) and pressure P required for their generation facilitates comparison between magma composition its source. To investigate compositional variations in Archean komatiites, a global selection 38 komatiites spanning five cratons (Kaapvaal, Zimbabwe, Yilgarn, Pilbara, Superior) were analysed major trace element contents. Included Aluminium-Depleted...
We present a novel approach to creating compositional images using module created for use with the freely distributed software package Iolite. The creates by synchronising state of laser (e.g., whether is firing or not) and position on sample, which are recorded in log files, concurrently collected mass spectrometer data. When these two data sources synchronised, temporally can then be displayed versus ablation (i.e., spatially). Each reading plotted as circular spot representing size area...
This papers describes the source of systematic bias in U–Pb zircon dating by LA-ICP-MS.