Latitude & Longitude (WGS84):	45° 34' 3'' South , 169° 19' 18'' East
Latitude & Longitude (decimal):	-45.56757,169.32171
GeoHash:	G#: pzbkv08m9
Köppen climate type:	Cfb : Temperate oceanic climate

The Island Block Gold Mining Company Ltd was formed in London in 1888 with 60 000 pounds capital. It came to an arrangement with land owner Joseph Clark, to hydro sluice on a massive scale his freehold land for a royalty. One source states the destruction of good agricultural land was not worth the meagre gold results, however another states after 1898 the gold obtained was fair.

An 1889 example states over 12 days 22 000 cubic yards of sand, mud and gravel was processed obtaining 50 ounces of gold, with costs amounting to 33% of the value of the gold obtained. The company employed around fourteen men. Professor C.E. Rawlins was General Manager, while John Oats Matthew originally from Cornwall was manager during early developments. Operations ceased in the early 20th Century.

Other dredges in the area was Hercules, Hercules Extended, and Roxburgh Amalgamated.

Island Block is 2 kilometres south of Roxburgh, on the eastern banks of the Clutha River. The Teviot Road which leaves Roxburgh, follows the eastern bank of the river, then parts company with it, Island Hill separating the river from the road. The road follows an old river channel for the Clutha River, in the process depositing gold. Hercules Flat marks the northern border, and Pinders Pond the southern border of this small area.

Mineral List

1 valid mineral.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Triassic - Permian 201.3 - 298.9 Ma ID: 3189657	Paleozoic-Mesozoic crystalline metamorphic rocks Age: Phanerozoic (201.3 - 298.9 Ma) Stratigraphic Name: Haast Schist Comments: Caples Terrane Lithology: Metawacke; greenschist/almandine amphibolite grade metasedimentary/metavolcanic schist Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]
Triassic 201.3 - 252.17 Ma ID: 1310831	Caples Group TZIII schist Age: Triassic (201.3 - 252.17 Ma) Stratigraphic Name: Caples Group Description: Schistose (TZIII) volcaniclastic sandstone, siltstone, mudstone and conglomerate with included volcanics and limestone; minor quartzite, metachert and serpentinite. Comments: Eastern Province (Caples Terrane) Rocks Lithology: Limestone, quartzite, chert, serpentinite Reference: Edbrooke, S.W., Heron, D.W., Forsyth, P.J., Jongens, R. (compilers). Geology Map of New Zealand 1:1 000 000. GNS Science Geological Map 2. [12]
Norian - Kungurian 208.5 - 279.3 Ma ID: 1350455	Undifferentiated Caples Terrane TZIII schist Age: Phanerozoic (208.5 - 279.3 Ma) Stratigraphic Name: Caples Group Description: Well foliated psammitic and pelitic schist with incipient segregration; minor greenschist and metachert; qtz veins common; TZIII. Comments: Basement (Eastern Province) metamorphic rocks. Age based on stratigraphic correlation, K-Ar dating Lithology: Major:: {schist},Minor:: {psammite, pelite, metachert, greenschist} Reference: Heron, D.W. . Geology Map of New Zealand 1:250 000. GNS Science Geological Map 1. [13]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

External Links