Fractured-controlled fluid flow and metasomatism in the contact aureole of the Marulan Batholith (New South Wales, Australia)

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doi: 10.1007/s00410-002-0377-2
Authors:Buick, Ian S.; Cartwright, Ian
Author Affiliations:Primary:
La Trobe University, Department of Earth Sciences & Victorian Institute of Earth and Planetary Sciences, Bundoora, Victoria, Australia
Other:
Monash University, Australia
Volume Title:Contributions to Mineralogy and Petrology
Source:Contributions to Mineralogy and Petrology, 143(6), p.733-749. Publisher: Springer International, Heidelberg-New York, International. ISSN: 0010-7999
Publication Date:2002
Note:In English. 30 refs.; illus., incl. 2 tables, geol. sketch map
Summary:The late Silurian Bungonia limestone was contact metamorphosed by the early Devonian Glenrock granodiorite at 500-580°C and 0.7-2.2 kbar. At > 60 m from the contact, the limestone is pure calcite marble; closer to the contact it has been metasomatized to form metre-scale dykes of garnet and clinopyroxene, wollastonite skarns, decimetre-thick veins rich in vesuviante and distinct breccia zones with thin veinlets of vesuvianite ± garnet. These skarns and veins represent channel-ways for aqueous Si-Mg-Fe-Al-bearing metasomatic fluids of magmatic origin. The δ 18O values of the marble are typically little reset (> 200/00), even within millimetres of the skarn breccias and only within tens of centimetres of the thicker skarns. These data are most compatible not with simple flow models but with the hydrofracture of corrosive, metasomatic fluids into initially dry rocks in short duration flow events. [R.A.H.]
Sections:Petrology
Subsections:Metamorphism: thermal, metasomatic
Subjects:Aureoles; Batholiths; C-13/C-12; Carbon; Cathodoluminescence; Contact metamorphism; Emplacement; Fractures; Intrusions; Isotope ratios; Isotopes; Magmatism; Metamorphic rocks; Metamorphism; Metasomatic rocks; Metasomatism; O-18/O-16; Oxygen; P-T conditions; Petrology; Skarn; Stable isotopes; Australasia; Australia; Lachlan fold belt; New South Wales Australia; Marulan Batholith
Coordinates:S360000 S340000 E1500000 E1480000
Abstract Numbers:03M/2228
Record ID:2003009486
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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