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Janet Muhling

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Assistant Professor
Room 1.85
Crawley campus

Research Interests:

Understanding the geological processes involved in the formation of rocks by Investigating the textural and compositional relationships of the minerals they are made from.

Areas of Expertise:

* Polarizing light microscopy

* SEM

* X-ray mapping

* ED and WD microanalysis

Optical image of rock Optical image of rock Optical image of rock

Current Students:

* Mrs Dana Crisan (PhD): Modelling exposure to traffic-related air pollutants using spatial and temporal interactions.

Current Projects:

* Petrogenesis, alteration and metamorphism of basaltic rocks from the Fortescue Group, Western Australia.

* The study of rare accessory minerals as tracers of the mechanisms, timing and rates of geological processes in rocks.

* P-T-t paths revealed by granulite-facies metapelites from the Narryer terrane.

* The mineralogy and formation of manganese ore from the east Pilbara region.

La X-ray map of monazite
 Optical image of rock

Recent Publications:

Rasmussen, B., Fletcher, I.R., Muhling, J.R., 2008. Pb/Pb geochronology, petrography and chemistry of Zr-rich accessory minerals (zirconolite, tranquillityite and baddeleyite) in mare basalt 10047. Geochimica et Cosmochimica Acta, doi:10.1016/j.gca.2008.09.010.
 
Sarma, D.S., Muhling, J.R., Mohan, M.R. & McNaughton, N.J., 2008. Occurrence of hydrothermal phosphate minerals in the gold mineralized zones at Hutti gold deposit, Karnataka. Journal of the Geological Society of India, 71, 223-228. Update existing.

Rasmussen, B., Fletcher, I.R., Muhling, J.R., Mueller, A.G. & Hall, G.C., 2007. Bushveld-aged fluid flow, peak metamorphism and gold mobilization in the Witwatersrand basin, South Africa: Constraints from in situ SHRIMP U-Pb dating of monazite and xenotime. Geology, 35, 931-934.

Rasmussen, B., Fletcher, I.R., Muhling, J.R., 2007. In situ U-Pb dating and element mapping of three generations of monazite: Unravelling cryptic tectonothermal events in low-grade terranes. Geochimica et Cosmochimica Acta, Volume 71(3), 670-690.

Sheppard, S., Rasmussen, B., Muhling, J.R., Farrell, T.R., Fletcher, I.R. 2007. Grenvillian-aged orogenesis in the Palaeoproterozoic Gascoyne Complex, Western Australia: 1030ñ950 Ma reworking of the Proterozoic Capricorn Orogen. Journal of Metamorphic Geology, 25, 477-494.

Rasmussen, B., Fletcher, I.R., Muhling, J.R., Thorne, W.S., Broadbent, G.C. 2007. Prolonged history of episodic fluid flow in giant hematite ore bodies: Evidence from in situ U-Pb geochronology of hydrothermal xenotime. Earth and Planetary Science Letters 258:249-259.

Rasmussen, B. & Muhling, J.R., 2007. Monazite begets monazite: evidence for dissolution of detrital monazite and reprecipitation of syntectonic monazite during low-grade regional metamorphism. Contributions to Mineralogy and Petrology, DOI:10.1007/s00410-007-0216-6.

Sarma, D.S., Muhling, J.R., Mohan, M.R., McNaughton, N.J., 2007. Occurrence of Hydrothermal Phosphate Minerals in the Gold Mineralized Zones at Hutti Gold Deposit, Karnataka. Journal of the Geological Society of India, In Press.

Rasmussen, B., Muhling, J.R., Fletcher, I.R. and Wingate, M.T.D., 2006. In Situ SHRIMP U-Pb dating of monazite integrated with petrology and textures: Does bulk composition control whether monazite forms in low-Ca pelitic rocks during amphibolite facies metamorphism? Geochimica et Cosmochimica Acta, 70, 3040-3058.

Conference Abstracts

Muhling, J.R., Fletcher, I.R. & Rasmussen, B., 2008. Dating high-grade metamorphic events in the Narryer Terrane by U-Pb SHRIMP analysis of monazite and zircon. Abstracts, Geological Society of Australia, 89, 180.

Muhling, J.R., Fletcher, I.R. & Rasmussen, B., 2008. The occurrence and geochronology of low-temperature metamorphic monazite from the basal Earaheedy Group, Western Australia. In Griffin, B.J. (ed.) Proceedings ACMM-20 & IUMAS-IV, 350-351.

Fletcher, I.R. & Rasmussen, B. & Muhling, J.R., 2008. SHRIMPing in the Sea of Tranquillity. In Griffin, B.J. (ed.) Proceedings ACMM-20 & IUMAS-IV, 283-284.

Sheppard, S., Johnson, S.P., Groenewald, P.B., Bodorkos, S., Rasmussen, B., Fletcher, I.R., Muhling, J.R. & Selway, K., 2008. Recent advances in our understanding of the Gascoyne Complex. Geol. Surv. West. Aust., Record 2008/2, 1-3.

Muhling, J.R., Rasmussen, B. & Fletcher, I.R., 2007. Low-temperature metamorphic monazite: occurrence, chemistry and geochronology. Abstracts, Geological Society of Australia, 86, 65-70.

Sheppard, S., Groenewald, P.B., Rasmussen, B., Muhling, J.R., Farrell, T.R. & Fletcher, I.R., 2007. First identification of Neoproterozoic orogenesis in the Gascoyne Complex, Western Australia: 1030-950 Ma reworking of the Capricorn Orogen. Abstracts, Geological Society of Australia.

Muhling, J.R., Rasmussen, B. and Fletcher, I.R., 2006. Timing and duration of deformation and amphibolite-facies metamorphism from U-Pb dating of texturally constrained monazite. Geochimica et Cosmochimica Acta, 70 (Supplement 1), 433.

Rasmussen, B., Muhling, J.R. and Fletcher, I.R., 2006. In situ U-Pb dating and element mapping of very low grade metamorphic monazite. Geochimica et Cosmochimica Acta, 70 (Supplement 1), 519.
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