Evidence for a Proterozoic carbonatite system in the Mount Isa Province, Australia

IF 3.2 2区地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY

Precambrian Research Pub Date : 2025-04-01 DOI:10.1016/j.precamres.2025.107784

Alex Brown , Carl Spandler , Thomas G. Blenkinsop

引用次数: 0

Abstract

Carbonatites are indicators of mantle processes, and they are economically important because of their association with rare earth element (REE), niobium and base metal deposits. Carbonatites and their associated lithologies (i.e. the carbonatite system) have not previously been identified in eastern Australia. We describe veins of dolomite calcite carbonatite, fenites and antiskarn, glimmerite, and alkali pegmatite from the Tommy Creek Domain, of the Eastern Subprovince of the Mount Isa Province (NW Queensland), that constitute a carbonatite system. The system can be identified from field relationships, geochronology, zircon trace elements, and stable and radiogenic isotopes. The emplacement of the carbonatite system coincided temporarily and spatially with regional hydrothermal alteration at ca. 1650 Ma in the Eastern Subprovince, which also has mantle isotopic affinities and is located above the boundary between thin and thick continental lithosphere.

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来源期刊

Precambrian Research 地学-地球科学综合

CiteScore

7.20

自引率

28.90%

发文量

325

审稿时长

12 months

期刊介绍： Precambrian Research publishes studies on all aspects of the early stages of the composition, structure and evolution of the Earth and its planetary neighbours. With a focus on process-oriented and comparative studies, it covers, but is not restricted to, subjects such as: (1) Chemical, biological, biochemical and cosmochemical evolution; the origin of life; the evolution of the oceans and atmosphere; the early fossil record; palaeobiology; (2) Geochronology and isotope and elemental geochemistry; (3) Precambrian mineral deposits; (4) Geophysical aspects of the early Earth and Precambrian terrains; (5) Nature, formation and evolution of the Precambrian lithosphere and mantle including magmatic, depositional, metamorphic and tectonic processes. In addition, the editors particularly welcome integrated process-oriented studies that involve a combination of the above fields and comparative studies that demonstrate the effect of Precambrian evolution on Phanerozoic earth system processes. Regional and localised studies of Precambrian phenomena are considered appropriate only when the detail and quality allow illustration of a wider process, or when significant gaps in basic knowledge of a particular area can be filled.