Field Excursions

Pre-Conference Excursions

Mines and Exploration Tour Western Namibia

29th August to 1st September, 4 days Lodging - N$ 9,450

Leader: Berti Roesener

This excursion will visit mining and exploration projects within the central and western portions of the Damara Orogenic Belt. Visits are planned to Navachab gold mine, the Calcrete hosted, Trekkopje Uranium mine (on care and maintenance) and the Alaskite hosted Uranium mines at Rossing Uranium and Husab Mine. There will also be a surface visit to the Namib Lead and Zinc Mine 25 km east of Swakopmund and Osina Resources have offered a field visit and core viewing from some of their gold prospects in the Wilhelmstal and Omaruru area of central Namibia.

Geology and Stratigraphy of Southern Namibia

28th August to 1st September, 5 days Lodging - N$ 10,600

Leaders: Dr. Ingrid Stengel, Helke Mocke

This excursion will visit the Karoo and Nama stratigraphy and fossils as well as geomorphology of southern Namibia. The first day is dedicated to details of the Dwyka tillites, glacial striations, Karoo stratigraphy and volcanics, fish and Mesosaurus fossils. The following days will focus on the Nama Group stratigraphy. Highlights will be the Ediacaran fossil record at farms Aar and Swartpunt, Black Limestone stromatolites and karst, the nature of the Nama base unconformity, and the overall extensional tectonics, as well as prehistoric sites on the Black Limestone (rock engravings and paintings).

Diamond Excursion

25th August to 1st September, 8 days Lodging and Camping - N$ 20,425

Leaders: Gottfried Grobbelaar, Dr. John Ward, Dr. Roger Swart

Since the initial discovery of diamonds in 1908 near Lüderitz, this regional composite placer deposit has yielded over 100 million carats of +95% gem quality stones. Most of this diamond production has been recovered from a variety of placer types that range in age from contemporary deposits to those that are some 42 million years old. Diamond Area No.1 hosts four major placer types, fluvial placers, marine placers deflation and aeolian placers.

Itinerary

Post-Conference Excursions

Damara Orogen Special Excursion

5th September to 11th September, 7 days Camping - N$ 18,500

Leader: Dr. Roy Miller

This excursion led by Dr. Roy Miller has been the signature field trip of the Namibian Geological Society for the past 3 decades. The excursion examines all aspects of the development of the NE trending arm of the Damara Orogenic Belt. As intracontinental rifting of Rodinia (± 880 Ma) evolved through spreading (± 760- 635 Ma) and continental separation (635 – 600 Ma), we will see rift-phase playa-lake evaporites, rift-shoulder submergence, passive margin turbidites, the whole of the Damara stratigraphic succession, the marker horizons of the Sturtian (Chuos Fm) and Marinoan (Ghaub Fm) Snowball- Earth glacial deposits and their associated cap carbonates, and pre-tectonic metagreywackes with the MORB of the 350-km long Matchless Amphibolite (635 – 600 Ma). Syn-tectonic features (595 – 542 Ma) will include the Southern Margin nappes, thrusts and accretionary prism, 4-stage evolution of F1 folds in marble domes, D1 to D3 structures, diapiric D3 marble domes with marble mylonites, arc-trench metagreywackes, progressive shortening and sheath-fold development during collision in the Southern Zone, and contamination of Damaran granites. Late- to posttectonic features include M2 LTHP and HTLP metamorphic assemblages (± 535 Ma), partial melting of granitic basement, Damaran metagreywackes, and of various syn-tectonic, 654 – 542 Ma Damaran granites, Nama Group shelly fossils (± 555 – 542 Ma), Nama deformation (542 Ma), the fore-arc Donkerhoek Granite (534-505 Ma), a tin pegmatite, and the gravity-induced emplacement of the Naukluft Nappe Complex at 495Ma.Younger features of the Namibian geology will be pointed out during the excursion.

Itinerary

North West Namibia

5th September to 10th September, 6 days Camping - N$ 16,200

Leader: Dr. Roger Swart

This excursion, in one of the most scenic parts of the country, will look at the geology, geomorphology and geological evolution of the continental margin. The stratigraphic range that will be covered will be from the Dwyka glaciation event through to the breakup of Africa and South America, an event heralded by the Cretaceous Etendeka Volcanics. In addition, what we know of the climate and subsequent erosion history will also be examined in light of the offshore geological record as well as observations from onshore.

Itinerary

Alkali Intrusive Excursion

5th September to 10th September, 6 days Lodging - Closed!

Leader: Peter Siegfried

The excursion focuses on the alkali complexes of Central Namibia and Damaraland with stops planned at the Otjizazu Carbonatite, North of Windhoek; Eisenberg, part of the Kalkfeld cluster, which has been dated at 240Ma and not the Aptian age of the Damaraland Alkaline Province, suggesting that many of these spatially congregated complexes can in fact be active over many millions if not tens of millions of years; the apatite rich Ondurokorume Carbonatite; Lofdal which has undergone significant exploration in recent years for its high HREE content; the HFSE enriched Amis Gorge, part of the Brandberg intrusion, with the final stop being the Damara aged (521Ma) Eureka Carbonatite.

Itinerary

Central and Northern Namibia Mines Tour

5th September to 9th September, 5 days Lodging - N$ 12,500

Leaders: Eckhard Freyer, Oliver Krappmann

This five-day excursion will visit six mines in central and northern Namibia, including one day in the Etosha National Park. The 30-year old Navachab Gold Mine near Karibib and the five-year old Otjikoto gold mine halfway between Otjiwarongo and Otavi are both orogenic gold deposits, which will be interesting to see and compare. At Tsumeb we will see the Tschudi copper mine, well-known for its SX-EW copper cathode plant, and the open-cast of the world-famous, now closed Tsumeb polymetallic mine. Although the Okanjande graphite and Okorusu fluorspar mines are both under care and maintenance, it will be possible to see them.

Itinerary

Note that a single supplement will be charged on accommodation.

For bookings or any information related to the field excursions contact Ms. Almut Talmage (almut@africamosaicsafaris.com).