Permian rocks

Hills, which are a component of the Western Carpathian Range. The mountain range at Kuriskova is composed of mesozonal to epizonal metamorphic rocks knowm as the Gemericum tectonic unit of the Carpathian belt. There is a nearly continuous, 0.5 to 6.0 km wide and 80 km long zone of Permian rocks along the northern periphery of the tectonic unit in which there are numerous uranium occurrences. 

Recurrent uplift and erosion of Permian strata coincident with the area of the Bannock highland also took place prior to Triassic deposition (3, 22) as indicated by the absence of Retort (fig. 4B) and younger Permian rocks in parts of eastern Idaho and some adjacent areas. 

Johnson, K.S. and Denison, R.E., 1973. Igneous geology of the Wichita Mountains and economic geology of Permian rocks in southwest Oklahoma. Okla. Geol. Surv., Spec. Publ. 73-2-—Guideb. Geol. Soc. Am., Field Trip No. 6 (1973 Annu. Meet.), 33 pp. 

Cressman ER, Swanson RW (1964) Stratigraphy and petrology of the Permian rocks of southwestern Montana. U S Geol Surv Prof Paper 313-C 275-C569... 

The volcanic detritus in the Section Peak Formation presumably originated from an off-shore subduction zone along the Pacific maigin of East Antarctica. Similar volcanic sediment occurs at the base of the Permian System in the Ellsworth Mountains (Section 8.1.3), in the Late Permian rocks of the Beardmore Glacier area, and in the Early Triassic rocks of southern Victoria Land (Collinson et al. 1986). The correlation of the stratigraphic sections of Beacon rocks in northern and southern Victoria Land is indicated in Table 10.6. 

Mesquite on soil derived from Permian rocks. 

Northern Pennines, Scotland Middle Permian rocks 1 18.20 15.54 38.15 5 ... 

Mansfeld, East Germany Middle Permian rocks 9 18.17 15.80 38.37 6 ... 

Spremberg. East Germany Middle Permian rocks 11 18.28 15.75 38.50 6 C/3 O... 

Sandstone The tertiary, Jurassic and Triassic sandstones of the western Cordillera of the United States account for most of the uranium production in that country. Cretaceous and Permian sandstones are important host rocks in Argentina. Other important deposits are found in carboniferous deltaic sandstones in Niger in Permian Lacustrine siltstones in France and in Permian sandstones of the Alpine region. The deposits in Precambrian marginal marine sandstones in Gabon have also been classified as sandstone deposits. 

Black coal. Black coal ranges from Cretaceous age (65 to 105 million years ago) to mid-Permian age (up to 260 million years ago). They are all black some are sooty and still quite high in moisture (sub-bituminous coal). A common name for this coal in many parts of the world is "black lignite. Coals that get more deeply buried by other rocks lose more moisture and start to lose their oxygen and hydrogen they are harder and shinier (e.g., bituminous coal). Typical energy contents are around 24 to 28 MJ/kg. These coals generally have less than 3% moisture, but some power stations burn coal at up to 30% ash. 

Central and Eastern England is almost entirely underlain by sedimentary rocks that young from west to east. Four major geological sub-divisions are presented in Figure 1. Permian and Triassic mudstone and sandstone dominate the East Midlands and parts of Yorkshire Jurassic clays crop out within the centre of the study area and Cretaceous chalk underlies most of Central East Anglia. 

The basement is made up of crystalline schists of the meso-metamorphic Somes Series. Sedimentation started during Permian with detritic deposits interbedded with rhyolites. The overlying Triassic deposits are unconformable and include detritic formations (Lower Triassic) and massive layers of carbonate rocks (Middle Triassic). The absence of the Upper Triassic is due to the uplift of the region during the Kimmeric tectonic phase. 

The Novoveska Huta and surrounding area are part of the North Gemeric Syncline, which belongs to the Gemericum tectonic unit. The deposit itself is hosted in folded and faulted Permian age rocks. Active exploration in the area continues and is extending the limits of known mineralization. 

Salt deposits are potential host rocks for the disposal of high-level radioactive waste. In this chapter we will present data from the Werra-Fulda district (northern Germany) where Upper Permian (Zechstein) salt is crosscut by numerous basalt dykes of Miocene age. 

Asphaltic Sandstone from Lodeve-Mas Alary, Herault, France. This rock of Permian age contains, together with uraninite, secondary uranium minerals, sulfides, molybdates, etc. (12, 15) (Figure 3). 

The reservoir rocks that yield crude oil range in age from Precambrian to Recent geologic time but rocks deposited during the Tertiary, Cretaceous, Permian, Pennsylvanian, Mississippian, Devonian, and Ordovician periods are particularly productive. In contrast, rocks of Jurassic, Triassic, Silurian, and Cambrian age are less productive and rocks of Precambrian age yield petroleum only under exceptional circumstances. 

Conway (1942) and Smulikowski (1954) have interpreted the potassium-distribution data to indicate that there is a potassium deficiency in Tertiary and Recent seas. However, Spiro and Gramberg (1964) made analyses of the composition of cations adsorbed on argillaceous rocks of northern Siberia and concluded that ... the highest content of potassium is inherent in marine water of the Permian Period. In Triassic seas the content of the potassium dropped significantly, and reached a minimum in seas of the Jurassic Period. Beginning with Cretaceous, the amount of potassium in sea water increased again, and during the Quaternary Period its level approached that of the Permian seas. These ideas are extremely speculative. 

The Period-averaged mass ratio of calcite to dolomite (Figure 10.29) is relatively high for Cambrian, Permian, and Tertiary System rocks, whereas this ratio is low for Ordovician through Carboniferous age sediments and rises in value from the Triassic through the Recent. The generalized sea level curve of Vail et al. 

In Figure 10.30 the survival rate of the total sedimentary mass for the different Phanerozoic systems is plotted and compared with survival rates for the total carbonate and dolomite mass distribution. The difference between the two latter survival rates for each system is the mass of limestone surviving per unit of time. Equation 10.1 is the log linear relationship for the total sedimentary mass, and implies a 130 million year half-life for the post-Devonian mass, and for a constant sediment mass with a constant probability of destruction, a mean sedimentation rate since post-Devonian time of about 100 x 1014 g y 1. The modem global erosional flux is 200 x 1014 g y-1, of which about 15% is particulate and dissolved carbonate. Although the data are less reliable for the survival rate of Phanerozoic carbonate sediments than for the total sedimentary mass, a best log linear fit to the post-Permian preserved mass of carbonate rocks is... 

Southwestern Guizhou Province is underlain by an extensive thick volume of Upper Paleozoic and Lower Mesozoic sedimentary rocks. The Permian strata, although areally much less extensive, contains coal-bearing argillaceous sedimentary rocks of the Longtan Formation (Fig. 17.2). Southwestern Guizhou Province and... 

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