Statherium

Aeonothem	Arathem	system	Age ( mya )
later	later	later
P r o t e r o z o i k u m Duration: 1959 Ma	Neoproterozoic Jungproterozoikum Duration: 459 Ma	Ediacarium	541 ⬍ 635
		Cryogenium	635 ⬍ 720
		Tonium	720 ⬍ 1000
	Mesoproterozoic Mittelproterozoikum Duration: 600 Ma	Stenium	1000 ⬍ 1200
		Ectasium	1200 ⬍ 1400
		Calymmium	1400 ⬍ 1600
	Paleoproterozoic Altproterozoikum Duration: 900 Ma	Statherium	1600 ⬍ 1800
		Orosirium	1800 ⬍ 2050
		Rhyacium	2050 ⬍ 2300
		Siderium	2300 ⬍ 2500
earlier	earlier	earlier

The statherian is the fourth period within the geological eon Proterozoikum ; it ends the Paleoproterozoic era . Its beginning is radiometrically set at 1800 million years BP and its end at 1600 million years BP. Its duration is 200 million years. The statherian follows the period of Orosiriums and from calymmian , the first period of the era Mesoproterozoic replaced.

Naming

The name Statherium is derived from the Greek σταθερός - statheros = solid, stable and is supposed to allude to the stabilization or cratonization of many old mainland cores during this time. During the statherium, new platforms emerge on most continents, such as the North China Craton or the North Australia Craton . On the Baltic Shield and in North America , previously formed fold belts finally become part of the craton.

stratigraphy

Significant sedimentary basins and geological formations

MacArthur Basin in the Northern Territory of Australia with the MacArthur Group and the overlying Nathan Group . The 1640 ± 3 million year old Barney Creek Formation from the MacArthur Group is the oldest known oil- bearing formation with a TOC content (organic carbon content) of up to 10.4%.

The MacArthur Basin was formed by two rift phases , first 1750 to 1710 million years BP and again 1640 to 1600 million years BP. It was then partially deformed by the Isa orogeny around 1600 million years BP .

Earaheedy Basin in Western Australia - 1900 to 1650 million years BP
Bangemall Basin on the Capricorn Orogen in western Australia - 1630 to 1300 million years BP
Vindhya supergroup in northern India - 1700-600 million years BP
- Semri Group - 1721 to 1599 million years BP
Xiong'er Group of the North China Craton - 1800 to 1750 million years ago
Changcheng System of North China Craton - 1731 to 1400 million years BP
- Changcheng Group - 1731 to 1600 million years old BP
Animikie Group in the United States and Canada - 2125 to 1780 million years BP

Geodynamics

Igneous accretion belts

After the continent collisions that had led to the formation of Columbia in the outgoing Orosirium , magmatic accretion belts caused by subduction and formed around the supercontinent from the statherium :

Yavapai Belt in the Southwest and Central Plains of the United States - 1800 to 1700 million years BP
Mazatzal Belt south of the Yavapai Belt - 1700 to 1600 million years BP
Makkovik Belt in Labrador - 1800 to 1700 million years BP
Labrador Belt in Labrador - 1700 to 1600 million years BP
Ketilid Belt in South Greenland - 1800 to 1700 million years BP
Malin Belt in the British Isles - 1800 to 1700 million years BP with
- Rhinn's Complex on Islay (intrusion age 1782 ± 5 million years BP), Inishtrahull (1779 ± 3 million years BP) and Colonsay
Trans- Scandinavian magma belt in Scandinavia - 1800 to 1700 million years BP

Kongsberg-Gotland Belt in Scandinavia - 1700 to 1600 million years BP

Rio Negro Juruena Belt in Brazil - 1800 to 1550 million years BP

Arunta Terran in Australia - 1800 to 1500 million years old BP

Musgrave Terran in Australia - 1800 to 1500 million years old BP

Mount Isa Terran in Australia - 1800 to 1500 million years BP

Georgetown Terran in Australia - 1800 to 1500 million years old BP

Coen Terran in Australia - 1800 to 1500 million years BP

Broken Hill Terran in Australia - 1800 to 1500 million years old BP

Orogenesis

Yapungku orogeny - 1795 to 1760 million years BP. Collision between the Northern Australian Craton and the Western Australian Craton .

The following orogenes occurred on the southern edge of the North Australian Craton:

Strangways orogeny - 1780 to 1730 million years BP
Argilke orogeny - 1680 to 1650 million years BP
Chewings orogeny - 1620 to 1580 million years BP

As well as the:

Olaria orogeny on the eastern edge of the South Australia craton - 1670 to 1600 million years BP
Isa orogeny on Mount Isa Terran - around 1600 million years BP

Towards the end of the Statherium (around 1600 million years BP) the supercontinent Columbia began to break apart again.

literature

James Ogg: Status of Divisions of the International Geologic Time Scale . In: Lethaia . tape 37 , no. 2 , June 1, 2004, ISSN 1502-3931 , p. 183–199 , doi : 10.1080 / 00241160410006492 ( stratigraphy.org ( memento of September 29, 2007 in the Internet Archive ) [PDF]).
Kenneth A. Plumb: New Precambrian time scale. In: Episodes. Volume 14, No. 2, Beijing 1991, pp. 134-140, ISSN 0705-3797 .

Web links

Statherian Period . In: GeoWhen Database . Retrieved January 5, 2006.
International Stratigraphic Chart 2009 (PDF; 485 kB).

Individual evidence

↑ RW Page, IP Sweet: Geochronology of basin phases in the western Mt Isa Inlier, and correlation with the McArthur Basin . In: Australian Journal of Earth Sciences . tape 45 , no. 2 , 1998, p. 219-232 , doi : 10.1080 / 08120099808728383 .
↑ MT Bradshaw, J. Bradshaw, AP Murray, DJ Needham, L. Spencer, RE Summons, J. Wilmot, S. Winn: Petroleum systems in West Australian basins . In: PG Purcell, RR Purcell (Ed.): The sedimentary basins of Western Australia (= Proceedings of the PESA Symposium. Petroleum Exploration Society of Australia ). Perth 1994, ISBN 0-646-19607-3 , pp. 93-118 .
↑ Guochun Zhao et al .: Assembly, Accretion and Breakup of the Paleo-Mesoproterozoic Columbia Supercontinent: Records in the North China Craton . In: Precambrian Research . tape 6 , no. 3 , 2003, p. 417-434 .
^ Nigel Woodcock and Rob Strachan: Geological History of Britain and Ireland . Blackwell Science Ltd, Oxford 2000, ISBN 0-632-03656-7 .

[1] RW Page, IP Sweet: Geochronology of basin phases in the western Mt Isa Inlier, and correlation with the McArthur Basin . In: Australian Journal of Earth Sciences . tape 45 , no. 2 , 1998, p. 219-232 , doi : 10.1080 / 08120099808728383 .

[2] MT Bradshaw, J. Bradshaw, AP Murray, DJ Needham, L. Spencer, RE Summons, J. Wilmot, S. Winn: Petroleum systems in West Australian basins . In: PG Purcell, RR Purcell (Ed.): The sedimentary basins of Western Australia (= Proceedings of the PESA Symposium. Petroleum Exploration Society of Australia ). Perth 1994, ISBN 0-646-19607-3 , pp. 93-118 .

[3] Guochun Zhao et al .: Assembly, Accretion and Breakup of the Paleo-Mesoproterozoic Columbia Supercontinent: Records in the North China Craton . In: Precambrian Research . tape 6 , no. 3 , 2003, p. 417-434 .

[4] Nigel Woodcock and Rob Strachan: Geological History of Britain and Ireland . Blackwell Science Ltd, Oxford 2000, ISBN 0-632-03656-7 .