Early Earth Workshop

13 - 23 November 2020, central and eastern Kaapvaal craton

In memory of Alfred Kröner

A workshop on the evolution of Archaean cratons will be held to commemorate the work of Alfred Kröner. This workshop is a free-standing event separate from Astrobiology 2020 conference, but has been organized to coincide with the end of the conference for logistical and administrative convenience, and for those who might like to take part in both.

The workshop consists of two parts, a scientific session to be held on Friday 13 November 2020 at SunWa Lodge, Vredefort Dome, and a 10-day field workshop thereafter to investigate some of the Archaean geology of the Kaapvaal craton. Delegates can register for either or both events. 

Organizing committee

  • Linda Iaccheri, University of the Witwatersrand
  • Holger Sommer, University of Namibia
  • Axel Hofmann, University of Johannesburg
  • Yamirka Rojas-Agramonte, Universidad de los Andes
  • Mike Brown, University of Maryland

Friday 13 November 2020: The evolution of Archaean cratons – the legacy of Alfred Kröner

The scientific session will present advances in the understanding of the evolution of Archaean cratons in the form of oral presentations. Themes may include, but are not limited to:

  • Formation of cratons and their early evolution
  • Granitoid-greenstone-gneiss terrains through time
  • Precambrian tectonics
  • Zircons, grey gneisses and the oldest rocks

Venue: Hippo Conference Room, SunWa Lodge, Vredefort Dome

Time: 9:00 to 16:00

Registration fee: xxx

The fee include coffee/tea and lunch.

Registration for the scientific session will close xxx. The registration form can be downloaded here.

Accommodation: we will assist with the booking of accommodation if needed

No registration for Astrobiology 2020 will be required if you are only interested in participating in the scientific session. Registered delegates of Astrobiology 2020 can participate in the session.


Sat 12 to Sat 19 Nov – Field workshop to investigate some of the Archaean geology of the Kaapvaal craton.

Note that we have a limited number of places on the field trip (25 people). You can participate on a first-come-first-served basis. Field trip registration will close on xxx. Participants are encouraged to present their research in the field.

The field trip registration fee (xxx) includes meals and accommodation (9 nights) from 14 Nov (lunch) to 23 Nov (lunch). All fees are inclusive of VAT.

Transport: transport will be in four-wheel-drive vehicles that will need to be driven by the delegates

Preliminary itinerary of Kapvaal Craton field workshop (Saturday 14 to Monday 23 November 2020)

Saturday, 14 November 2020

Day 1

Archaean basement of the Vredefort Dome; overnight in the Vredefort Dome

Sunday, 15 November 2020

Day 2

Travel to KwaZulu-Natal, visit of 3.5-3.4 Ga Nondweni greenstone belt; overnight near Babanango (Babanango Valley Lodge)

Monday, 16 November 2020

Day 3

Kaapvaal Craton cover succession - the 3.0 Ga Pongola Supergroup; overnight near White Mfolozi River

Tuesday, 17 November 2020

Day 4

Traverse of the 3.4 – 3.2 Ga Commondale-Piet Retief granitoid-greenstone terrain; overnight in Badplaas

Wednesday, 18 November 2020

Day 5

3.5 – 3.2 Ga Barberton granitoid-greenstone terrain – workshop with talks/discussion; overnight in Badplaas

Thursday, 19 November 2020

Day 6

Barberton granitoid-greenstone terrain; overnight near Barberton (Diggers Retreat)

Friday, 20 November 2020

Day 7

Travel through the granitoid-migmatite terrain of the Krueger National Park; overnight in Krueger Park (Letaba Camp)

Saturday, 21 November 2020

Day 8

3.0 Ga Murchison granitoid-greenstone terrain; overnight in Leydsdorp

Sunday, 22 November 2020

Day 9

3.0 Ga Murchison granitoid-greenstone terrain; overnight in Leydsdorp

Monday, 23 November 2020

Day 10

Field workshop ends after breakfast; return to Johannesburg for arrival in the afternoon.


Oral presentations will require submission of an abstract. Abstract submission will close xxx. The abstract template can be downloaded here. Talks can be given at the scientific session of the field workshop. The publication of a conference abstract booklet as part of the Gondwana Conference Series is planned.