Ranking Favorable Zones for Geothermal Potential in the Southeastern Part of Central Iranian Volcanic Belt

2021 ◽  
Author(s):  
A. Hojat ◽  
N. Heydarabadi Pour ◽  
H. Ranjbar ◽  
S. Karimi-Nasab
Keyword(s):  
Volcanic Belt ◽  
Southeastern Part ◽  
Geothermal Potential

scholarly journals A new record of Paramylodon harlani (Owen 1840) (Xenarthra, Pilosa, Mylodontidae) from the late Pleistocene of Valsequillo, Puebla, with comments on its paleobiogeography and paleoecology in Mexico

2021 ◽  
Vol 73 (1) ◽  
pp. A100720
Author(s):  
Gerardo Carbot-Chanona ◽  
Eduardo Jiménez-Hidalgo ◽  
Francisco J. Jiménez-Moreno ◽  
Enrique Benítez-Gálvez
Keyword(s):  
Late Pleistocene ◽  
New Record ◽  
Volcanic Belt ◽  
The United States ◽  
Southeastern Part ◽  
Left Tibia ◽  
The North ◽  
Preferred Habitat ◽  
Mexican Volcanic Belt ◽  
Ground Sloth

Paramylodon harlani was a large ground sloth recorded across North America, from Canada to Mexico. In Mexico, it is known from several late Pleistocene localities, but most of these records just mention the taxon in passing and few specimens have been described or illustrated. In this work, we describe a left tibia from the Valsequillo Basin, Puebla state. Its morphology and measurements allowed us to identify it as Paramylodon harlani, adding a new record for Mexico. In Mexico, P. harlani occurred mainly in the Trans-Mexican Volcanic Belt, central Mexico, with some records in the north and southeastern part of the country. Most localities are located between 1500 to 2000 m.a.s.l. Paleoenvironmental and paleoclimatic inference in some localities of Mexico where P. harlani occurred, showed heterogenous vegetation dominated by grasslands, and agree with the preferred habitat proposed for this species based on localities in the United States. This indicates that P. harlani could inhabit different environments, from grasslands to more wooded areas, and this adaptation allowed it to extend its range from the north to the southeast of Mexico.

scholarly journals Geologic Map of Los Humeros volcanic complex and geothermal field, eastern Trans-Mexican Volcanic Belt

2017 ◽  
Vol 1 (2) ◽  
Author(s):  
Gerardo Carrasco-Nuñez ◽  
Javier Hernández ◽  
Lorena De León ◽  
Pablo Dávila ◽  
Gianluca Norini ◽  
...  
Keyword(s):  
Volcanic Belt ◽  
Structural Features ◽  
Geothermal Field ◽  
Google Earth ◽  
Radiometric Dating ◽  
Volcanic Complex ◽  
Stratigraphic Sequence ◽  
Mexican Volcanic Belt ◽  
Geothermal Potential ◽  
Geologic Map

We present an updated version of the geologic map of Los Humeros Volcanic Complex (LHVC) and geothermal field, based on acomplete revised characterization of the rock units and contacts, structural features, stratigraphy and recent radiometric dating withmodern methods (U/Th, 40Ar/39Ar, Carrasco-Núñez et al., 2017, in press), together with the use of high resolution Digital TerrainModel at 1m resolution and Google Earth optical imagery. Improvements of this version include refined stratigraphic sequence,revised classification of each lithostratigraphic unit, updated structural features and geochronologic data; all together providingconstraints to support a new evolutionary volcanic history for LHVC. Main changes with previous works involve the recently dis-covery of much younger ages for the main caldera-forming eruption. Much younger ages were also obtained for other importantexplosive phases. These findings reveal the existence of a much younger long-lived magmatic system with Holocene activity and ahigh geothermal potential that requires a further assessment for exploration and volcanic hazard purposes.

The structure of the Southeastern part of the Yano-Kolyma Fold Belt by the results of interpretation of various scale magnetic data

2020 ◽  
Author(s):  
Denis Zubov ◽  
Kseniia Antashchuk ◽  
Alexey Atakov ◽  
Kirill Mazurkevich ◽  
Marina Petrova
Keyword(s):  
System Analysis ◽  
Deep Structure ◽  
Sedimentary Cover ◽  
Volcanic Belt ◽  
Geological Structure ◽  
Magnetic Data ◽  
Fold Belt ◽  
Southeastern Part ◽  
Wide Range ◽  
Tectonic Settings

<p>The wide range of anomalies caused by different geological structures from local to regional are studied by the heterogeneous datasets. They usually include the surveys of highly variable scales, resolution and quality. These parameters determine the methodology and technique used in further interpretation. The absence of detail and high quality surveys of geomagnetic field for large areas does not allow the implementation of the system analysis approach to full spectra of anomalies of magnetic field. The possibilities of system analysis using for various scale magnetic surveys to clarify of the tectonic settings and geological structure of the southeastern part of the Yano-Kolyma fold belt are considered. The geological structure of this area was studied earlier by the seismic and magnetotelluric investigations along 2DV regional profile. The tectonic settings are represented by several folded areas and cratons which are covered and knit together by Late Mesozoic bends and volcanic belt. The system interpretation of various scale magnetic surveys allowed us to obtain the geological and tectonic models of this area that include the following principal components: the deep structure of joint zones of different tectonic blocks; the structure and thickness of Paleozoic – Mesozoic deposits of sedimentary cover, crystalline basement and bends; the structure of volcanic belt deposits.</p>

Geology of the Coquihalla Volcanic Complex, southwestern British Columbia

1980 ◽  
Vol 17 (8) ◽  
pp. 985-995 ◽  
Author(s):  
Robert G. Berman ◽  
Richard Lee Armstrong
Keyword(s):  
British Columbia ◽  
Volcanic Belt ◽  
Fault Scarp ◽  
Volcanic Complex ◽  
Calc Alkaline ◽  
Southeastern Part ◽  
Juan De Fuca Plate ◽  
The North ◽  
Igneous Activity ◽  
Volcanic Belts

The Coquihalla Volcanic Complex consists of calc-alkaline acid to intermediate extrusive and intrusive rocks that have an areal extent of roughly 30 km2 near Hope, British Columbia. The oldest and most voluminous members of the complex are rhyolitic pyroclastic rocks that have an overall thickness of approximately 1600 m. Later igneous activity produced numerous andesite to dacite domes, dykes, and sills. A late stage diorite to quartz diorite stock forms the core of Coquihalla Mountain.Pyroclastic rocks rest unconformably on the Jurassic to Cretaceous Eagle pluton and Lower Cretaceous Pasayten Group rocks. Monolithologic avalanche breccias were deposited against a fault scarp of uplifted Pasayten Group rocks in the southwestern portion of the map area. In the southeastern part of the area, monolithologic granitic avalanche breccias formed in response to lilting and uplift of the underlying Eagle pluton as the basin subsided.Three K–Ar dates average 21.4 ± 0.7 Ma, and are concordant with a Rb–Sr isochron (22.3 ± 4 Ma with initial 87Sr/86Sr = 0.70370 ± 0.00008) based on seven whole-rock samples which span the entire compositional range of the suite. These results indicate that the Coquihalla Volcanic Complex is coeval with calc-alkaline centres in the Pemberton Volcanic Belt (PVB).The north-northwest trend of the PVB is parallel to, but roughly 75 km east, of the Pleistocene to Recent Garibaldi Volcanic Belt (GVB). Both volcanic belts appear to have formed as a result of subduction of the Juan de Fuca plate. Genetic models must explain the easterly displacement of the PVB, the development of larger volumes of rhyolitic compositions in this belt as compared to the GVB, and the decrease in age of igneous rocks from south to north within the PVB.

Exploring the near surface geothermal structure at Mt. Meager, British Columbia, Canada

2021 ◽  
Author(s):  
Fateme Hormozzade Ghalati ◽  
James A. Craven ◽  
Dariush Motazedian ◽  
Stephen E. Grasby ◽  
Eric Roots ◽  
...  
Keyword(s):  
British Columbia ◽  
Volcanic Belt ◽  
Inversion Algorithm ◽  
Recording Equipment ◽  
Near Surface ◽  
Related Information ◽  
Geothermal Potential ◽  
Manual Processing ◽  
Well Data ◽  
Grid Mesh

<p>Mount Meager is located ~150 km north of Vancouver, British Columbia Canada, and is a part of the Garibaldi volcanic belt. Exploration at Mount Meager for geothermal energy resources has been ongoing since 1974 and has shown, based on well data, that there is a permeable zone at a depth of 1200-1600 m and that the reservoir has a temperature of 270 °C near 2500 m depth. In this study, we have utilized recordings and related information from a new network of 84 audio-magnetotelluric (AMT) stations collected during the summer of 2019 plus 37 stations from previous studies to investigate the geothermal potential of the area around Mount Meager and Pylon peak. We used Phoenix Geophysics’ MTU-5C recording equipment and their proprietary software for data processing, separating extensive noise from the signal, to calculate the components of the natural electrical and magnetic signals in the frequency domain. After manual processing and editing, the data showed good quality in the frequency range of 1 to 1000 Hz. The ModEM inversion algorithm (Egbert and Kelbert, 2012) was then used to model the data. Modelling started using a coarse grid mesh with different starting resistivities, and then a finer grid size and topography was added to refine the model. The preliminary result of this 3D inversion defines the shape and location of conductors in the study area. The results show a conductor at a depth 2000 m located to the southwest of Mount Meager. Comparison of the 3D model and the geological setting of the area demonstrated that this conductor shallows toward the southern portion of the No-good Fault.</p>

Flora of diatoms of the surface layer of bottom sediments of small lakes of the southeastern part of Belarus

2004 ◽  
Vol 6 (2) ◽  
pp. 186-198
Author(s):  
G. K. Khursevich ◽  
A. V. Kudelskiy ◽  
S. A. Fedenya ◽  
J. Marphy
Keyword(s):  
Surface Layer ◽  
Bottom Sediments ◽  
Small Lakes ◽  
Southeastern Part

Geothermy and zoning of shale oil prospects of the Koltogor-Urengoy paleorift (southeastern part of West Siberia)

2018 ◽  
Vol 40 (3) ◽  
pp. 54-80 ◽  
Author(s):  
V. I. Isaev ◽  
G. A. Lobova ◽  
V. V. Stotskiy ◽  
A. N. Fomin
Keyword(s):  
West Siberia ◽  
Shale Oil ◽  
Southeastern Part

The Chingandzha flora of the Okhotsk-Chukotka volcanic belt

Palaeobotany ◽  
2019 ◽  
Vol 10 ◽  
pp. 13-179
Author(s):  
L. B. Golovneva
Keyword(s):  
River Basin ◽  
Volcanic Belt ◽  
Flowering Plants ◽  
Sedimentary Deposits ◽  
North East ◽  
The North ◽  
Magadan Region ◽  
Chukotka Volcanic Belt ◽  
Systematic Composition ◽  
Coastal Lowlands

The Chingandzha flora comes from the volcanic-sedimentary deposits of the Chingandzha Formation (the Okhotsk-Chukotka volcanic belt, North-East of Russia). The main localities of the Chingandzha flora are situated in the Omsukchan district of the Magadan Region: on the Tap River (basin of the middle course of the Viliga River), on the Kananyga River, near the mouth of the Rond Creek, and in the middle reaches of the Chingandzha River (basin of the Tumany River). The Chingandzha flora includes 23 genera and 33 species. Two new species (Taxodium viligense Golovn. and Cupressinocladus shelikhovii Golovn.) are described, and two new combinations (Arctopteris ochotica (Samyl.) Golovn. and Dalembia kryshtofovichii (Samyl.) Golovn.) are created. The Chingandzha flora consists of liverworts, horsetails, ferns, seed ferns, ginkgoaleans, conifers, and angiosperms. The main genera are Arctop teris, Osmunda, Coniopteris, Cladophlebis, Ginkgo, Sagenoptepis, Sequoia, Taxodium, Metasequoia, Cupressinocladus, Protophyllocladus, Pseudoprotophyllum, Trochodendroides, Dalembia, Menispermites, Araliaephyllum, Quereuxia. The Chingandzha flora is distinct from other floras of the Okhotsk-Chukotka volcanic belt (OCVB) in predominance of flowering plants and in absence of the Early Cretaceous relicts such as Podozamites, Phoenicopsis and cycadophytes. According to its systematic composition and palaeoecological features, the Chingandzha flora is similar to the Coniacian Kaivayam and Tylpegyrgynay floras of the North-East of Russia, which were distributed at coastal lowlands east of the mountain ridges of the OCVB. Therefore, the age of the Chingandzha flora is determined as the Coniacian. This flora is assigned to the Kaivayam phase of the flora evolution and to the Anadyr Province of the Siberian-Canadian floristic realm. The Chingandzha flora is correlated with the Coniacian Aleeky flora from the Viliga-Tumany interfluve area and with other Coniacian floras of the OCVB: the Chaun flora of the Central Chukotka, the Kholchan flora of the Magadan Region and the Ul’ya flora of the Ul’ya Depression.

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