Most ore deposits occur in hydrothermally altered metavolcanic rocks and associated metalimestones and skarns. J depositional facies and rese rvoir quality of deepmarine sandstones in the norwegian sea. Eruptive history of the barombi mbo maar, cameroon. Facies analysis and sequence stratigraphic framework of upper campanian strata neslen and mount garfield formations, bluecastle tongue of the castlegate sandstone, and mancos shale, eastern book cliffs, colorado and utah by mark a. Ballance department of geology university of auckland private bag 92019 auckland, new zealand present address. Facies architecture model of the shimentan formation. Facies architecture of the volcanic sedimentary complex of. Facies analysis of volcanosedimentary successions hosting massive sulfide. Borehole imaging log analysis, a volcanic facies and. Facies analysis of volcano sedimentary successions hosting. An analysis of volcanic facies in kimberlites from the buffalo head hills bhh of northern alberta, canada, is undertaken to discover the mechanisms of kimberlite eruption and deposition in this region.
Volcanic facies free download as powerpoint presentation. Application of seismic facies classification, spectral. Pdf facies analyses and volcanic setting of the giant. Facies analysis of pyroclastic deposits within basaltic tuffrings of the auckland volcanic field, new zealand sharon r. Modern and ancient, quite apart from its thorough descriptions of volcanic deposits, takes an original approach in using the method of facies and analysis and interpretation derived from sedimentology to integrate studies of both ancient and modern volcanic activity. An introduction to facies analysis in volcanic terrains springerlink. This thesis presents a detailed volcanological study of the permotriassic rocks that host the lowsulphidation epithermal gold deposit at the chatree mine in the loeipetchabun volcanic belt, central thailand. In proximal sections, thick felsic pumice\ud breccia intervals were intruded by compositionally similar, porphyritic, rhyolitic and new shrimp vpb data from four major volcanic facies, in combination with detailed\ud mapping and facies analysis, have enabled construction of an enhanced, internally consistent\ud timestratigraphic framework for. Recognizing distinct portions of seamounts using volcanic facies analysis. Facies analysis of proximal subglacial and proglacial volcaniclastic. Facies analysis suggests that the iberian pyrite belt volcanism took place in a submarine, belowwavebase, depositional environment and that water depth increased to the. The seismic facies units sill facies units were identi. Volcanic facies architecture and evolution of milos.
The volcanic successions comprise interfingering proximal near vent, medial volcano flanks, and distal volcano margin facies associations of. Seismic characteristics and distribution of volcanic. Volcanic facies analysis of a subaqueous basalt lavaflow complex. This study provides a detailed facies analysis, which allows characterizing the deposits as well as defining some of the characteristics of the volcanism and sedimentation. They include lavas, deposits of explosive pyroclastic. Seismic facies identification and classification using. T units was established based on the reconstruction results of paleo. Mitchell department of geography and geology, university of the west indies, mona, kingston 7, jamaica this paper was prepared for presentation at the gstt 2000 spe conference held in.
Volcaniclastic sedimentation and facies volcanology. The main facies are silicic volcanic facies, mafic volcanic facies, reworked volcaniclastic facies, siliciclastic facies, slope instability facies, and hydrothermal facies. Pdf understanding volcanic facies in the subsurface. Sedimentary facies, physical, chemical, and biological aspects of a sedimentary bed and the lateral change within sequences of beds of the same geologic age. The main facies are silicic volcanic facies, marie volcanic facies, reworked volcaniclastic facies, siliciclastic facies, slope instability facies, and hydrother mal facies. Volcanic successions modern and ancient a geological. The results show that the drilling reveals proximal facies pf and distal facies df of the volcanic edifices.
Seventeen volcanic and sedimentary facies are defined. Pdf volcanic facies analysis of a subaqueous basalt lavaflow. Constraints from volcanic facies analysis resented in the north of the bmm 34, 35. The proximal facies may include the source volcano vessel and davies, 1981, but where the source is not exposed, proximal facies rocks can be defined by type of transport such as lava flows short travel distance, lahars, and fallout layers most fartravelled and, in the case of reworked pyroclastics or volcanic epiclastic materials, on. This book celebrates the professional career of harold reading, who has played a leading role in the development of the ias, and has been at the roots of the development of facies sedimentology as an art in itself and as a major tool in the broader field of geology. Shelves definition and a bit of history factors controlling shelf sedimentation s a m a h a be ht todays agenda continental shelves. Subsurface facies analysis using electrologs a case. Geology and method to determine the condition of the geological research area, geological mappmg approached by traversmg or observing geological outcrops have done usmg barnes and lisle guidance 3. Facies architecture and origin of a submarine rhyolitic. Volcanic faciesdefined lateral andor vertical changes in physical aspects of rock bodies deposited within a specific interval of geologic time. Geochronology and facies analysis of subaqueous volcanism. Facies geology article about facies geology by the. Analysis of volcanic facies at the chatree gold mine and. The late paleozoic felsic lavadominated large igneous.
Volcanic facies analysis of a subaqueous basalt lavaflow complex at hruskovec, nw croatia evidence of advanced rifting in the tethyan domain. Pdf eruptive history of the barombi mbo maar, cameroon. Recognizing distinct portions of seamounts using volcanic. These activities probably began in the eocene 36 and completed 1ma ago 35. Abstract his study presents the first and detail field investigations of exposed deposits at proximal sections of the barombi mbo maar bmm, ne mt cameroon, with the aim of documenting its past activity, providing insight on the stratigraphic. Department of earth sciences, monash university, victoria. Facies analysis and facies associations in the recognition of volcanic centres in silicic terranes. Summary descriptions and interpretations of lithofacies examined on. Read recognizing distinct portions of seamounts using volcanic facies analysis. Massive sulfide deposits in the iberian pyrite belt. Seismic facies analysis is the description and interpretation of seismic reflection parameters, such as configuration, continuity, amplitude, and frequency, within the. Lake, carlos torresverdin, and sanjay srinivasan, the university of texas at austin summary the identification and mapping of rock facies is important to reliable reservoir characterization. The disconformity surface between the kaleybar and.
They include lavas, deposits of explosive pyroclastic eruptions, primary volcanic autoclastic deposits and deposits resulting from the very significant spectrum of sedimentary processes that operate in volcanic terrains. A particular facies is developed by a combination of complex processes prevailing during the period of their deposition and variations in the source material. Pdf volcanic facies analysis of a subaqueous basalt lava. This study is a fieldoriented, regional facies analysis based on recognition of primary volcanic and sedimentary features through the strong overprints of hydrothermal alteration, deformation, and metamorphism. Volcanic facies\ud analysis has been carried out on three areas in portugal, including the neves corvo mine, and\ud five sections in spain. Chapter 3 volcanic facies architecture of the mount black and sterling valley volcanics 3. Facies analysis and sequence stratigraphic framework of upper. Eruptive history of the barombi mbo maar, cameroon volcanic line, central africa.
Chapter 3 volcanic facies architecture of the mount black. Volcanic rock facies prediction in yingcheng formation. Typically the facies is a unit of rock that was formed under conditions reflecting a specific emplacement process e. While qualitative interpretation of individual attributes has dominated attribute analysis to date, the future belongs to quantitative multiattribute analysis for geologic prediction. Sedimentary rocks can be formed only where sediments are deposited long enough to become compacted and cemented into hard beds or strata.
The massive sulfide\ud ore deposits occur in a felsic volcanic and sedimentary succession vs complex of late\ud famennian upper devonian to late visean middle carboniferous age. Facies analyses and volcanic setting of the giant neves corvo massive sulfide deposit, iberian pyrite belt, portugal. An introduction to facies analysis in volcanic terrains. Seismic facies identification and classification using simple statistics abraham k. In core, thickness ranges from a few inches or centimeters to 2. The transport direction of each volcanic eruption is analyzed using crystal fragment size analysis. In the deep subsurface of the northeast german basin products of extensive volcanism are present that formed during the waning phase of the variscan orogeny permiancarboniferous boundary. Results from borehole logging operations of a borehole in. The resulting text, a remarkable achievement by any. A body of rock with characteristics that are the same. Coherent, autoclastic, peperitic, pyroclastic and volcaniclastic facies were recognized between the different volcanic facies.
Kimberlite bodies k6, k11, k252, k281, k296 and k300 were selected to represent the range of. Detailed facies mapping, coupled with geochemical and geochronological analysis at multiple outcrop localities throughout the city of rouynnoranda, quebec, show that the stratigraphy of the new senator caldera is dominated by subaqueous effusive mafic volcanic facies with local felsic effusive and intrusive deposits. Kimberlite volcanic facies and eruption in the buffalo. Subsurface facies analysis using electrologs facies mean the facial expression of a particular condition. Regardless of the method, attributes are used like filters to reveal trends or patterns, or combined to predict a seismic facies or a property such as porosity. A facies analysis has been systematically carried out on several volcanosedimentary successions of the ore host unit. The identification of facies and their generic interpretation are based on detailed.
Excluding investigations of some pioneers involved in palynology and limnology 33, 35, a detailed. Facies analysis and paleoenvironmental reconstruction of. Volcanic terrains consist of a greater variety of rock types than any other surface environment on earth. Facies analysis of pyroclastic deposits within basaltic. Facies analysis of a cretaceouspaleocene volcaniclastic braiddelta simon f. Rocks of similar age that lack appreciable mineralisation have also been studied in the surrounding petchabun region and in the south of the belt on koh chang island. Pdf facies analysis of the volcanosedimentary host rocks of. Our detailed fieldbased facies analysis of the submarine volcanic succession on the island of ponza included field mapping of the extent and relationships of facies and collection of grain size, shape, and other textural data utilizing a largescale pointcounting grid at selected localities. Thirtyeight kimberlites have been discovered in the bhh to date. Pdf volcanological facies analysis and stratigraphy of the silicic.
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