How are sedimentary basins classified?
How are sedimentary basins classified?
Basins are classified by their tectonic setting (divergent, convergent, transform, intraplate), the proximity of the basin to the active plate margins, and whether oceanic, continental or transitional crust underlies the basin. Basins formed in different tectonic regimes vary in their preservation potential.
What is the classification of basin?
The basic dynamic types of basin classification include the prototype basin forming under a single tectonic, thermal, or gravity regime and the superimposed basin as well as residual basin forming under multistage thermal and/or tectonic regimes.
What are the three types of basin?
The major types of basins are river drainage basins, structural basins, and ocean basins.
What is a sedimentary basin in geology?
A sedimentary basin is an area of the earth’s crust that is underlain by a thick sequence of sedimentary rocks. Hydrocarbons commonly occur in sedimentary basins and are absent from intervening areas of igneous and metamorphic rocks (North, 1971).
How many sedimentary basins are there in the world?
A total of 764 separate sedimentary basins were mapped with 241 in Asia, 146 in North America, 100 in Africa, 72 in Europe, 71 in South America, 56 in southeast Asia, 35 in Central America, 31 in the Middle East, and 12 in Antarctica.
What are the three sedimentary basins in Nigeria?
… of Nigeria (Figure 2) and these are located in a number of sedimentary basins, comprising the Benue (central), Sokoto (north-west border), Chad (north-east), Bida (central, along the Niger valley), Dahomey (south- west) and Anambra (south-east) Basins and the Niger delta (south coastal).
How many types of sedimentary basin are there?
| Types of sedimentary basins | |
|---|---|
| Rift-related basins | |
| Basin type | Geological Origin |
| Rift basin | The down-dropped basin formed during rifting because of stretching and thinning of the continental crust |
| Passive margin basin | Subsidence along a passive margin, mostly due to long-term accumulation of sediments on the continental shelf |
How many sedimentary basins are there in India?
26 sedimentary basins
India has 26 sedimentary basins covering an area of 3.14 million square kilometres. The sedimentary basins of India, onland and offshore up to the 200m isobath, have an areal extent of about 1.79 million sq. km.
What is the largest sedimentary basin on earth?
The deepest basins (>15 km) are found in the southern Caspian Sea and in the western Gulf of Mexico. Sedimentary rocks are important because they are the “tape recorder” of past climate, sea-level and environmental change. They are also the world’s largest repositories of oil and gas.
What are Category II basins?
• Category-III Basins, which have prospective resources awaiting discovery. Based on conventional resource potential, 7 basins are grouped under Category-I covering 30% of total basinal area and holding 85% of the total unrisked conventional hydrocarbon in-place of 41.8 billion ton oil and oil-equivalent gas.
How many sedimentary basins are there in Nigeria?
three sedimentary basins
The three sedimentary basins in Nigeria are underlain by continental crust except in the Niger delta, where the basement rock is interpreted to be oceanic crust.
How many basins are there in Nigeria?
eight
In Nigeria there are eight main river basins, i.e. the Benue, Delta and Cross Rivers, the Imo-Anambra, Hadejia-Chad, Sokoto-Rima, Niger, Owena and Ogun, and Osun Basins.
What is Tertiary sediment?
Sediments of Tertiary age are widely developed on the deep ocean floor and on elevated seamounts as well. In the shallower parts of the ocean (above depths of 4.5 km [about 3 miles]), sediments are calcareous (made of calcium carbonate), siliceous (derived from silica), or both, depending on local productivity.
How many sedimentary basins are there?
India has 26 sedimentary basins covering an area of 3.14 million square kilometres. The sedimentary basins of India, onland and offshore up to the 200m isobath, have an areal extent of about 1.79 million sq.
What are different sedimentary basins in India?
These 7 basins are namely Krishna-Godavari (KG), Mumbai Offshore, Assam Shelf, Rajasthan, Cauvery, Assam-Arakan Fold Belt and Cambay.
Which of the following is categorized as III category basin in India?
INDIAN SEDIMENTARY AREA
| Basin Category | No. | Basin Name |
|---|---|---|
| Category III (Basins with only prospective resources to be explored and discovered) | 25 | Satpura-S.Rewa-Damodar |
| 26 | Spiti-Zanskar | |
| Category III Total | ||
| Deep Water Areas |
What is the geodynamic context of sedimentary basin classification?
The geodynamic context of sedimentary basins is embedded in several classification schemes, particularly those proposed by Dickinson (1974), Kingston et al. (1983) , and later iterations by Busby and Ingersoll (1995), Ingersoll (2012), and Allen and Allen (2013).
What are the different types of sedimentary basins?
GEOL-201 Sedimentary Basins fCratonic basins Convergence related basins Strike-slip basins ffIntracratonic basins form within stable continental interiors. A good example is the Western Canada Sedimentary Basin extending from the eastern side of the Rocky Mountains to central Manitoba.
How are basins classified according to plate-tectonic characteristics?
Basins are classified according to primary plate-tectonic controls on basin evolution: (1) type of sub-stratum, (2) proximity to plate boundary, and (3) type of nearest plate boundary (s).
What is the origin of sedimentary basins?
Dickinson recognised that sedimentary basins evolve in concert with tectonic plates and plate boundaries.
