Detailed gis analysis of isopach maps suggests that the kinderhookian sunbury shale is less than 30 ft thick throughout most of the basin, although thicknesses greater than 140 ft are present on the eastern side. Expand this as necessary to specify the formations whose thickness is to be modeled unit top. Abstract the pannonian basin system is an integrap part of the alpine mountain belts of eastcentral europe. Michigan and southern ontario, canada figure 41, more than 8000 of. Isochore and isopach maps are two different types of thickness map. Geophysics is applied to societal needs, such as mineral resources, mitigation of natural hazards and environmental protection.
Cretaceous vermillion river formation morden member contour and isopach maps 1. Isopach maps of cretaceoustertiary formations from mackenzie. Gypsum investigations in the harcus area, southwestern. Pdf formation tops and isopach maps of cretaceous strata of. Below you will find thumbnails of a series of different pictures, maps, and information sheets that are free to download to your computer and use for educational purposes. Following late cambrian time, the waverly arch woodward, 1961 and other features developed. Love the series of stratigraphic framework maps for the saskatchewan phanerozoic fluids and petroleum systems spfps project have been produced using 2 km equispaced modified grids generated from golden softwares surfer 9 kriging algorithm. This data set is a compilation of data acquired mostly by airborne surveys in canada, gridded at 200 m and 1 km resolutions. Click on the formation name to the right to select the stratigraphic unit whose top or base is to represent the upper surface of the isopach model top of unit.
Summit creek, east fork, little bear, slater river, mahony lake, arctic red and martin house. Helens eruption, the isopachs produced here are more comparable to those determined using numerical models e. Each continent was analyzed individually and isopach maps were constructed using the rockworks 17 software that represented the entire sauk megasequence. The four core isopach maps are supplemented with information on the stratigraphic context, data support, and sediment characteristics of each unit. Structural map difference between isopach and isochore maps. An objective method for the production of isopach maps and. Stratigraphic framework of lower and upper cretaceous rocks. Geo logical surve y of canada, open file 7326, 4 p. A contour map of equal values of true vertical thickness is an isochore map.
For more detailed maps based on newer satellite and aerial images switch to a detailed map view. These maps are used in the stratigraphy, structural. It is completely encircled by the carpathian mountains to the north and east, the dinaric alps to the south, and the southern and eastern alps to the west. Whereas most of the time it is assumed that the individual strata of sedimentary sequences are laterally continuous and of constant thickness, unconformities in the terrain can transform the boundaries of individual layers to for example conformable curves. To construct an isopach map from borehole logs, one locates the top and. The australia geological edge set is available to subscribing companies on an annual license basis per company, based on daily worldwide production. Why this structure formed in front of the regional. A line on a map that connects geologic units of equal rock thickness. Central intelligence agency 1997 374k and pdf format 346k. Information and translations of isopach map in the most comprehensive dictionary definitions resource on the web. The terms isopach and isopach map are incorrectly used interchangeably to describe isochores and isochore maps. Includes field outlines, structural features, formation limits and outcrops, reservoir trends, structure and isopach maps, shale gas trends. All files in pdf, excel, or surfer 8 format map overview pdf format a geological tops excel format b isopach and structure maps pdf format generalized bedrock geologic map of north dakota miscellaneous map 36 by john p.
To demonstrate reservoir properties in a plan view projection with objectives to promote optimal field development. The geological atlas of the western canada sedimentary basin was designed primarily as a reference volume documenting the subsurface geology of the western canada sedimentary basin. Exercise 4 facies relationships university of northern iowa. Marcellus shale play energy information administration. Pdf this chapter primarily comprises a set of 20 isopach and structurecontour maps of various stratigraphic intervals and horizons in the national. December 2012 woodford shale structure and isopach maps. Cretaceous strata of mackenzie plain and parts of peel plain, n orthwest t erritories. The details of the modelling process are described in logan et al. Isopach maps of individual dus show that in general they have a consistent thickness, although stratal thickening of dus occurs in the landward part of the spv and extends over an area of 400 km 2. Both cordilleran tectonic loading and pra uplift and subsidence were intermittent and appear to have influenced stratal depositional trends in the pra region during cretaceous time. Reservoir volumetric calculations, including the estimation of drainage area for historical leduc producing wells, are based on reservoir and production attributes presented in table 1 and the original oilwater contact of approximately. Everyone in canada and around the world should have access to material to help learn more about the dominion of canada.
Shifts in depocenter locations during the mississippian in the michigan basin usa, canada j. Explain that a tephra isopach map is a standard tool used by geologists who study. December 2012 woodford shale structure and isopach maps brian j. Isopach map of the upper lexingtontrenton formation above the logana member.
Geol 493 subsurface mapping west virginia university. Pdf formation tops and isopach maps of cretaceous strata. Structurecontour and isopach maps of the national petroleum reserve in alaska article pdf available in usgs professional paper 99 january. Society of petroleum geologists, calgary, alberta, canada, 1423 p. Isopach maps of the lower pouce coupe formation serve as an example of aggradation, where the basement floor appears to have subsided as a uniform sheet. Thickness isopach map of the marcellus formation thickness maps isopachs show spatial distribution of formation thickness across the formation figure 2. For each strata in the drillholes, this routine can generate isopach maps, or isolines of the strata thickness, bottom elevation, and attributes such as moisture, sulfur, and btu.
The maps will be used for well placement, reserves calculation, reservoir performance monitoring. Satellite map shows the earths surface as it really looks like. These geologic elements are documented and illustrated as a series of maps. The scale on fogo c lithic isopleth map is the same for all fogo c and congro maps.
Structure contour map on the precambrian unconformity surface. The above map is based on satellite images taken on july 2004. Sediment thickness of alberta alberta geological survey aer. Geological survey of canada, calgary, alberta, canada summary the constructed isopach maps display cretaceoustertiary formations within the mackenzie plain in the northwest territories. Johns quebec ottawa iqaluit calgary edmonton yellowknife vancouver victoria winnipeg montreal torontottorontooronto frederricton whitehorse regina saskatoon fredericton baffin island s a s k a t c h e w a n saint. An isopach map shows the areal variation in the thickness of a stratigraphic unit. Map of guides to cities of canada online travel reservation expert providing reliable car rental and hotel booking services. Isopach map is a map used to delineate the variations in thickness within a layer, tubular unit or stratum. The sedimentary basins of the united states and canada. Isopach maps of cretaceoustertiary formations from. Spratt, and vlada avramovic university of calgary pink mountain anticline is located at the cordilleran thrust front 57on, 123w. To determine whether maps prepared from aerial photographs would be equally useful, a test area previously mapped in the field was mapped by photogeologic methods. Energy information administration based on drillinginfo inc.
Unconformities and isopach maps course subjects 09. Tectonic origin of pink mountain anticline, northeastern british columbia. Parasequence architecture in a lowaccommodation setting. Surface and subsurface memoir 15, 1988 pages 553561 western canada sedimentary basin a comparison of isopach maps and total subsidence maps. Tectonic origin of the pink mountain anticline northeastern british columbia, results from isopach maps and seismic sections. Figure 4 a cross section and b net pay isopach map of the strachan gas field, western canada. Thickness and distribution of quaternary and neogene sediment in. Thickness and distribution of quaternary and neogene sediment in alberta, canada. The regional scale maps that are included in this report are compatible with those published in the geological atlas of the western canada sedimentary basin mossop and shetsen, 1994 and represent an update and extension of the maps presented in chapter 10 of the same meijer drees, 1994. The photo geologic isopach maps delineated both the swales and the channels. Introduction waterloo region is situated in southwestern ontario and occupies an area of about 1400 km2. Begin and end the activity with the tephra isopach map student page, where students read that at cascade. Pdf structurecontour and isopach maps of the national. The pink mountain anticline is located at the cordillera front 57 o n, 123 o w.
The splinegenerated isopach maps are broadly similar to isopach maps drawn by highly experienced volcanologists. Structural contour and isopach maps of the bakken formation in north dakota. A contour connecting points of equal true vertical thickness of strata, formations, reservoirs or other rock units. The central part of the study area is complexly deformed, and the group of anticlines, synclines, and domes there. Except for vertical wells in horizontal beds, corrections for wellbore deviation and formation dip are needed to make isopach maps. This gis dataset is one of a collection of shapefiles representing part of chapter 16 of the atlas, triassic strata. Isopach maps are utilized in hydrographic survey, stratigraphy, sedimentology, structural geology, petroleum geology and volcanology an isopach map is similar to an isochore map, but these terms actually describe. All structure maps display elevations in ft relative to mean sea level msl, with bold red lines representing major fault zones that were active in the ordovician patchen. Depth structure maps sea level 2 2 511 502 362 530 525 385 362 356211 land surface cross sectional view well 1 well 2 well 3 well 4 well 5 log depth true vertical depth subsea depth dealing with multiple layers isopach maps plot the elevation difference between two maps mississippian top pennsylvaniantop 1800. Drillcore and water well data were computer generated to create the structure contour and isopach maps in figures gs182 and 3. It is one of the largest municipal users of groundwater in canada. Central intelligence agency 1994 237k and pdf format 240k. Click this radio button if the upper surface of the isopach model is to be the top of the. It is observed that in some of the examples, particularly that of the mount st.
The strata in the interval represented by the isopach maps are distinctive. Thickness maps are also known as isopach maps, and they utilize contour lines to connect points of equal sedimentary rock thickness across an area. A geologic play book for utica shale appalachian basin exploration. The manitoba stratigraphic map series paleozoic and mesozoic. Modeling of the western canada sedimentary basin isopach grid files. This map is a rendering of a computergenerated geostatistical model of the thickness and distribution of sediment overlying bedrock in alberta. Locations of formation outcropssubcrops were derived primarily from maps in. An isopach map is essentially a contour map of the specified strata values.
Structurecontour and isopach maps of the national petroleum reserve in alaska article pdf available in usgs professional paper 99 january 1989 with 783 reads how we measure reads. The geological survey of canada has flown or supervised more than 700 surveys since 1947, generally with a flightline spacing of 800 m and an altitude of 305 m above the. They represent thickness variations and thickness trends of a given unit. Isopach mapping by photogeologic methods as an aid in the. Computergenerated structure and isopach maps for 56 geological horizons, spanning manitoba.
This map is a rendering of a computergenerated geostatistical model of the. Utica play, thickness map of the combined utica point. Isopach maps of cambrian units by janssens 1973 and harris 1975 show thickening of cambrian units in southwestern ohio, indicating the illinois basin was subsiding in southwestern ohio during cambrian deposition. An isopach is a line that connects points of equal true thickness i. Thickness contour isopach maps feature contour intervals of 10 ft. Each of these wells has fully penetrated at least one cambrian rock unit. Isopachs are referred to as the contour lines with equal thickness over a particular area. The general isopach patterns, however, are broadly similar in that the main dispersal axis is clearly identified. S energy information administration, based on drillinglnfo inc. Faults mapped fiom approximately 600km of 2d seismic data, combined with structural features inferred from 28 isopach maps, form the basis of this correlation. These maps are used in the stratigraphy, structural geology, volcanology, petroleum geology and sedimentology. Eastern us appalachian basin geological edge set geoedges inc. Thickness maps are a fundamental tool in structural geology. Some of the map figures within that publication also contain isopach and structural contours based on outcrop or other studies that were not included within the.
A 3dimensional geological model of the oak ridges moraine. Utica and point pleasant isopach feet faults utica organic rich area point pleasant organic rich area utica play extent ordovician outcrops counties states eia source. Thickness maps are also known as isopach maps, and they utilize contour lines to connect points of equal sedimentary. Petroleum system modeling of the western canada sedimentary. Dec 06, 2017 each continent was analyzed individually and isopach maps were constructed using the rockworks 17 software that represented the entire sauk megasequence. The following maps figures 44 through 416 illustrate the results of the stratigraphic correlations for this study, including both structure and annotated isopach maps. This satellite map of canada is meant for illustration purposes only. The sedimentary record demonstrates minimal flooding of the. Isopach maps made by photogeologic methods were compared with one isopach map and one channel map that were prepared by field methods. Tectonic origin of pink mountain anticline, northeastern. This sug gests that photogeologic methods are adequate for use in defining swales similar.
Cretaceous upper ashville contour and isopach maps 1. Stratigraphic framework of lower and upper cretaceous. Why this structure formed in front of the regional foothills belt is not apparent from geological. Maps for fogo a and fogo 1563 are from walker and croasdale 1971 and maps for fogo b, c, d and congro are from booth et al. Locations of formation outcropssubcrops were derived primarily from maps in the geologic atlas of the western canada sedimentary basin mossop and shetsen, 1994. Implications for basin development and sandstone distribution during the lower cretaceous in the deep basin area of alberta and british columbia. Isopach maps ogy 701 605 601 642 583 654 694 103 696 692 676 682 720 650 600 700 ct s a s e f. Isopachs are contour lines of equal thickness over an area.
The 28 formations range from mesozoic to devonian in age, and from approximately 100 to 2300m in depth below ground surface. In volcanology, this typically relates to the thickness of an ash or tephra deposit from an explosive eruption. Structure contour maps feature contour intervals of 50 ft with 250ft index contours. Appalachian basin geological edge set is available to subscribing companies on an annual license basis per company, based on daily production. Setijadji draft may 4, 2003 prepared for esri book publication entitled. The sedimentary record demonstrates minimal flooding of. Cretaceous favel formation contour and isopach maps 1. Subsurface geology geology of petroleum geoscienceworld. Application of satellite and airphoto remote sensing to risk.
A contour map of equal values of true stratigraphic thickness is an isopach map. Central intelligence agency 1999 272k and pdf format 281k. Isopach maps of formations or groups of formations that thin or converge more or less uniformly in one direction are sometimes called convergence maps. The maps were prepared with data derived from geophysical well logs, descriptive logs and well samples from 101 oil and gas test wells, mineral extraction wells and deep disposal wells.
313 1198 1542 1234 1311 816 641 412 764 1263 1314 1519 1484 966 361 1309 328 1460 49 1500 1218 229 159 337 891 404 1067 33 785 956 120 329 192 1191 568 162 518