aboriginalflag

RST Apology to Tasmanian Aboriginal people 2021.

Regional geology of the southern Furneaux Group

Papers & Reports

Summary

The lower Palaeozoic Mathinna Beds are intruded and contact metamorphosed by sixteen Devonian, granitoid plutons in the southern Ferneaux Group, northeastern Tasmania. Contact metamorphic aureoles range from 200m to 2km wide and on Clarke Island the metamorphic assemblage cordierite-andalusite-biotite-quartz-potash feldspar is preserved.
Approximately 70 per cent by area of the granitoid terrain is composed of garnet and/or cordierite-bearing biotite granites (eight plutons), 20 per cent biotite granites (five plutons) including two altered plutons, and 10 per cent hornblendebiotite granodiorites (three plutons). The granitoids were intruded by widespread dolerite dykes of pre-Tertiary age. Cainozoic sedimentary sequences are thin and irregularly distributed. Mid-Tertiary sediments formed in lagoonal and shallow water marine environments have been reworked during the Quaternary by alluvial and aeolian processes In the Rooks River tinfield the cassiterite, which was eroded from
pervasively altered Rooks River granite, is thought to be a lag deposit derived by reworking of the Tertiary sediments. Potential areas of exploration include southern end of the Lee River valley near the strongly altered RooksRiver granite and the alluvial fans north and south of the altered Hogans Hill granite pluton.

Acknowledgement of Country

The Royal Society of Tasmania acknowledges, with deep respect, the traditional owners of this land, and the ongoing custodianship of the Aboriginal people of Tasmania. The Society pays respect to Elders past, present and emerging. We acknowledge that Tasmanian Aboriginal Peoples have survived severe and unjust impacts resulting from invasion and dispossession of their Country. As an institution dedicated to the advancement of knowledge, the Royal Society of Tasmania recognises Aboriginal cultural knowledge and practices and seeks to respect and honour these traditions and the deep understanding they represent.

aboriginalflag

On 15 February 2021, the Royal Society of Tasmania offered a formal Apology to the Tasmanian Aboriginal people.