![]() ![]() It is formed by geographical coordinates of 33˚29"59'N and 56˚13"56'E, and is located about 95 kilometers from Tabas-Ardekanold main road, accessible by a one-kilometer-dirt road (Figures 1-3). ![]() This section is located in southwestern Kalmard Caravansary (at 1:250,000 scale) and northeast of Robate-khan village in Kalmard zone (at 1:100,000 scale). Kalmard Block, showing a northeastern trend, is placed between Kalmard faults in the east and those of Naein in the west. Structural model of this area consists of blocks separated by deep faults, thereby exhibiting distinct properties. Gachal and Chili formations complies with the global-scaleĬentral Iran zone, shaped like a triangle and as one of the major, largest and most complex geological units in Iran, is situated in the center of Iran. The depositional sequences identified in Gachal formation point to the Lower Carboniferous age, conforming to Siliciclastic and evaporiteĭeposits include LST system tract, whereas carbonate microfacies involve TSTĪnd HST system tracts, separated from each other by MFS. The mixed carbonate-evaporite-siliciclastic sequence of Gachalįormation is made up of three third-order depositional sequences, separatedįrom each other by Type 1 sequence boundary (SB1). (Chili formation) are depicted overlying an erosional unconformity above thisįormation. It unconformably underliesĭevonian deposits (Rahdar formation) while lateritic soils of lower Permian Limestone and dolomite as well as a small amount of shale and marl in theīakhshi section. ![]() This formation commonly hosts 190 m sandstone, limestone, dolomitic These deposits (in Gachal formation) areĬomposed chiefly of carbonate, evaporite and siliciclastic Kalmard Block are characterized by Gachal informal formation, showing various Because of the simultaneous, competitive nature of the research, numerous oil companies and academic groups use the terminology of sequence stratigraphy differently, and new terms are added continually.The deposits of Lower Carboniferous rocks in Further study of seismic lines led to the interpretation of the geometry or architecture of seismic events as representing particular styles of sedimentation and depositional environments, and the integration of such interpretations with well log and core data. Studies of outcrops and seismic lines bore out these concepts, which initially were called " Seismic Stratigraphy" and first published widely in 1977. Through sequence stratigraphy, widely-separated sediments that occur between correlatable unconformities could be compared with each other. The field originated during the 1960s with the study of the stratigraphy of the continental USA, where numerous unconformities could be correlated widely, and led to the proposal that major unconformities might mark synchronous global- scale events. Prediction of reservoir continuity is currently a key question in mature hydrocarbon provinces where sequence stratigraphy is being applied. ![]() Sequence stratigraphic study promotes thorough understanding of the evolution of basins, but also allows for interpretations of potential source rocks and reservoir rocks in both frontier areas (having seismic data but little well data) and in more mature hydrocarbon provinces. Sequences tend to show cyclicity of changes in relative sea level and widespread unconformities, processes of sedimentation and sources of sediments, climate and tectonic activity over time. A field of study in which basin-filling sedimentary deposits, called sequences, are interpreted in a framework of eustasy, sedimentation and subsidence through time in order to correlate strata and predict the stratigraphy of relatively unknown areas. ![]()
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