| Autor: |
Norgate, C. M., Boreham, C. J., Kamp, P. J. J., Newman, J. |
| Zdroj: |
Journal of Petroleum Geology; October 1997, Vol. 20 Issue: 4 p427-458, 32p |
| Abstrakt: |
The Buller Coalfield in the northern portion of the Paparoa Trough (NW South Island, New Zealand) contains a middle Eocene bituminous coal‐bearing succession that exhibits marked variations in both coal rank and type. The across‐basin rank changes result from differential late Palaeogene subsidence of the Paparoa Trough and subsequent inversion. Superimposed upon coalification trends are down‐seam variations in coal type, evidenced by isorank variation in conventional chemical parameters. These type variations are not a consequence of changes in maceral group proportions, which are dominated by vitrinite. |
| Databáze: |
Supplemental Index |
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