Trig Bluff prospect, Neavesville (Nevesville), Thames-Coromandel District, Waikato Region, North Island, New Zealand
| Latitude & Longitude (WGS84): | 37° 10' 39'' South , 175° 41' 53'' East |
|---|---|
| Latitude & Longitude (decimal): | -37.17763,175.69822 |
| GeoHash: | G#: rckuw0589 |
| KΓΆppen climate type: | Cfb : Temperate oceanic climate |
Silver-gold.
Located between the historic Ajax Mine to the north, and Champion Mine to the south. This site has been the main focus for exploration companies since the 1980's. Since 2012 the site has been covered by a lease held by E2 Metals (2018). Sixty-nine drilling holes, rock chip sampling, a review of historical data, and wireframe 3D geological modelling has produced an Inferred JORC Compliant resource of 1,489,500 tonnes of ore for 123,600 ounces gold at 2.58 g/t, and 509,100 ounces of silver at 9.69 g/t.
Silver-gold is found in quartz stringers cutting silicified breccias and volcanic rocks, forming a prominent bluff. Epithermal mineralisation is found in a large multiphase breccia complex that cuts faulted volcanic, and minor sedimentary rocks. The Au-Ag mineralisation is steep dipping, low sulphidation in quartz-adularia veins, and as pervasive stock work veins in breccia and dacite porphyry.
There are two main mineralised zones being (1) a lower black silicified shale adjacent to the breccia intrusion; and (2) upper electrum in quartz vein stock works in rhyolite tuffs and silicified breccia.
Mineral List
3 valid minerals.
Rock Types Recorded
Select Rock List Type
Alphabetical List Tree DiagramRegional 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
| Quaternary 0 - 2.588 Ma ID: 3187411 | Cenozoic volcanic rocks Age: Pleistocene (0 - 2.588 Ma) Lithology: Ignimbrite(s); felsic volcanic rocks; rhyolite 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] |
| Pliocene - Late Miocene 2.588 - 11.62 Ma ID: 1308439 | Whitianga Group rhyolite lava and related deposits Age: Neogene (2.588 - 11.62 Ma) Stratigraphic Name: Whitianga Group Description: Rhyolite lavas and dome complexes with associated breccia and tuff; minor obsidian and intense hydrothermal alteration locally. Comments: Zealandia Megasequence Extrusive and Intrusive Rocks (Neogene) Lithology: Rhyolite, breccia, tuffite 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] |
| Messinian - Tortonian 5.333 - 11.62 Ma ID: 1358737 | Coroglen Subgroup ignimbrite (Whitianga Group) of Coromandel Volcanic Zone Age: Miocene (5.333 - 11.62 Ma) Stratigraphic Name: Coroglen Subgroup Description: Ignimbrite flow sheets and local rhyolitic and obsidian-rich pumice breccia deposits and tuff. Comments: Neogene igneous rocks. Age based on K-Ar and FT Lithology: Major:: {ignimbrite},Minor:: {rhyolite, tuff, breccia} 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
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