scholarly journals Metallogenic specialization of the Precambrian crystalline complexes in the Tyrkanda tectonic zone between granulite terranes of the Aldan-Stanovoy shield (North-Asian craton)

2020 ◽  
Vol 609 ◽  
pp. 012023
Author(s):  
Alexander Kravchenko ◽  
Vasiliy Beryozkin ◽  
Vladimir Timofeev ◽  
Agrafena Sharina ◽  
Evgeniy Kardash ◽  
...  
Keyword(s):  
Tectonic Zone ◽  
North Asian Craton

PETROGENESIS, AGE, AND CORRELATION OF THE KAZAN DIKE SWARM, NUNAVUT, CANADA: IMPLICATIONS FOR AN ABORTED RIFT ORIGIN FOR THE SNOWBIRD TECTONIC ZONE

2016 ◽  
Author(s):  
Lisa J. Grohn ◽  
◽  
Sean P. Regan ◽  
Michael L. Williams ◽  
Larissa De Santana Do Nascimento ◽  
...  
Keyword(s):  
Tectonic Zone ◽  
Dike Swarm

scholarly journals Differential characterization of stress sensitivity and its main control mechanism in deep pore-fracture clastic reservoirs

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Denglin Han ◽  
Huachao Wang ◽  
Chenchen Wang ◽  
Wenfang Yuan ◽  
Juan Zhang ◽  
...  
Keyword(s):  
Evaluation Method ◽  
Oil And Gas ◽  
Rapid Change ◽  
Stress Sensitivity ◽  
Irreversible Damage ◽  
Tectonic Zone ◽  
Oil And Gas Fields ◽  
Moderate Change ◽  
Sample Measurement ◽  
Gas Fields

AbstractStress sensitivity in reservoirs is critical during the exploitation of oil and gas fields. As a deep clastic reservoir under strong tectonic compression, the Ahe Formation in the northern tectonic zone of the Kuqa depression exhibited strong stress sensitivity effect. However, the conventional evaluation method by using permeability damage rate as a constraint restricts the mechanistic understanding of the strong stress sensitivity effect. In this study, morphology of stress sensitivity test curve, coupled with rate change of permeability and extent of irreversible damage in actual sample measurement through micro-CT in-situ scanning, is used to characterize differentially. The strong stress sensitivity effects of the studied intervals can be divided into three types: (1) rapid change in permeability–weak irreversible damage, (2) moderate change in permeability–strong irreversible damage and (3) moderate change in permeability–moderate irreversible damage. The strong stress sensitivity is caused by the micro-pores and micro-fractures, which are widely developed in the studied reservoir. The mechanisms caused by the two types of pore are different. The stress sensitivity effects in micro-fracture-rich reservoirs are characterized by rapid change in permeability and weak irreversible damage. Meanwhile, the stress sensitivity effects in micro-pore-rich reservoirs are manifested as moderate change in permeability and strong irreversible damage. The study shows that the differences in the content of micro-pores and micro-fractures and their reverse mechanisms of stress sensitivity co-create different types of stress sensitivity within the samples. Accordingly, the differences of the stress sensitivity type in macroscopic samples are caused by the competition between the microscopic differences of pore types.

scholarly journals Contribution to crustal strain accumulation of minor faults: a case study across the Niigata–Kobe Tectonic Zone, Japan

2020 ◽  
Vol 72 (1) ◽  
Author(s):  
Tomonori Tamura ◽  
Kiyokazu Oohashi ◽  
Makoto Otsubo ◽  
Ayumu Miyakawa ◽  
Masakazu Niwa
Keyword(s):  
Strain Accumulation ◽  
Tectonic Zone ◽  
Crustal Strain

Late mesozoic adakite volcanism of the Ugan volcanic structure (Southeastern Margin of the North Asian Craton): 40Ar/39Ar geochronological and geochemical evidence

2012 ◽  
Vol 445 (2) ◽  
pp. 947-950 ◽  
Author(s):  
A. A. Sorokin ◽  
A. P. Sorokin ◽  
V. A. Ponomarchuk ◽  
Yu. A. Martynov ◽  
A. M. Larin ◽  
...  
Keyword(s):  
Volcanic Structure ◽  
North Asian Craton ◽  
Late Mesozoic ◽  
Geochemical Evidence ◽  
The North ◽  
Southeastern Margin

Division Features of Coal-Bearing Tectonic Units in North China

2015 ◽  
Vol 737 ◽  
pp. 827-830
Author(s):  
Kang Liu ◽  
Guo Hong Qin ◽  
Zhi Kai Ma
Keyword(s):  
North China ◽  
Tectonic Structure ◽  
Tectonic Zone ◽  
Coal Resources ◽  
Tectonic Zones ◽  
Potential Evaluation ◽  
Basic Characteristics

Based on the new round of national potential evaluation on coal resources, and reference to the latest achievements about regional geological and energy basins, this article analyzed the main features of North China coalfield structure. According to the main features of North China coalfield structure and the distribution of North China coal series, the boundary of North China coal-bearing tectonic region and the division of North China coal-bearing tectonic units were identified. North China coalfield tectonic region can be divided into 5 coal-bearing tectonic sub-regions and 22 coal-bearing tectonic zones. The basic characteristics of the tectonic structure and its influence upon coal series distribution in each coal-bearing tectonic zone were systemically discussed.

scholarly journals A Tectonic Zone in the Northwestern Part of Kinki District, Southwest Japan (2)

1985 ◽  
Vol 38 (2) ◽  
pp. 243-249
Author(s):  
Susumu NISHIMURA ◽  
Tohru MOGI ◽  
Kazuo MIND ◽  
Osamu YAMADA
Keyword(s):  
Northwestern Part ◽  
Southwest Japan ◽  
Tectonic Zone

Delamerian Glenelg tectonic zone, western Victoria: Geology and metamorphism of stratiform rocks

2002 ◽  
Vol 49 (2) ◽  
pp. 187-200 ◽  
Author(s):  
C. M. Gray ◽  
A. I. S. Kemp ◽  
J. A. C. Anderson ◽  
D. J. Bushell ◽  
D. J. Ferguson ◽  
...  
Keyword(s):  
Tectonic Zone ◽  
Western Victoria

A seismic-based cross-section of the Grenville Orogen in southern Ontario and western Quebec

2000 ◽  
Vol 37 (2-3) ◽  
pp. 183-192 ◽  
Author(s):  
D J White ◽  
D A Forsyth ◽  
I Asudeh ◽  
S D Carr ◽  
H Wu ◽  
...  
Keyword(s):  
Cross Section ◽  
Seismic Refraction ◽  
Shear Zones ◽  
Tectonic Zone ◽  
Grenville Province ◽  
Crustal Layer ◽  
Seismic Reflection Data ◽  
Velocity Models ◽  
Laurentian Margin ◽  
Structural Boundary

A schematic crustal cross-section is presented for the southwestern Grenville Province based on reprocessed Lithoprobe near-vertical incidence seismic reflection data and compiled seismic refraction - wide-angle velocity models interpreted with geological constraints. The schematic crustal architecture of the southwest Grenville Province from southeast to northwest comprises allochthonous crustal elements (Frontenac-Adirondack Belt and Composite Arc Belt) that were assembled prior to ca. 1160 Ma, and then deformed and transported northwest over reworked rocks of pre-Grenvillian Laurentia and the Laurentian margin primarily between 1120 and 980 Ma. Reworked pre-Grenvillian Laurentia and Laurentian margin rocks are interpreted to extend at least 350 km southeast of the Grenville Front beneath all of the Composite Arc Belt. Three major structural boundary zones (the Grenville Front and adjacent Grenville Front Tectonic Zone, the Central Metasedimentary Belt boundary thrust zone, and the Elzevir-Frontenac boundary zone) have been identified across the region of the cross-section based on their prominent geophysical signatures comprising broad zones of southeast-dipping reflections and shallowing of mid-crustal velocity contours by 12-15 km. The structural boundary zones accommodated southeast over northwest crustal stacking at successively earlier times during orogeny (ca. 1010-980 Ma, 1080-1060 Ma, and 1170-1160 Ma, respectively). These shear zones root within an interpreted gently southeast-dipping regional décollement at a depth of 25-30 km corresponding to the top of a high-velocity lower crustal layer.

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