Main Features of Evolution and Magmatism of Continental Rift Zones in the Cenozoic

The active geothermal waters of Kızıldere, Bayındır, and Salihli in the continental rift zones of the Büyük Menderes, Küçük Menderes and Gediz represent typical examples in the study area. The meteoric waters in the drainage areas of the rift zones percolate at NE-SW and/or NW-SE trending fault zones and permeable clastic sediments into the reaction zone of the roof area of a magma chamber situated in a probable depth of up to 5 km where meteoric fluids are heated by the cooling magmatic melt and ascend to the surface due to their lower density caused by convection cells. The volatile components of CO2, SO2, HCl, H2S, HB, HF, and He out of the magma reach the geothermal water reservoir where an equilibrium between altered rocks, gas components, and fluids performs. Thus, the geothermal waters ascend in the tectonical zones of weakness at the continental rift zones of the Menderes Massif in terms of hot springs, gases, and steams. These fluids are characterized by high to medium CO2, H2S and NaCl contents.

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Special Features of the Forming of Thermal Waters of the Eastern Part of the Khangay Neotectonic Uplift

Proceedings of the Mongolian Academy of Sciences ◽

10.5564/pmas.v0i4.48 ◽

2011 ◽

pp. 64-70

Author(s):

PS Badminov ◽

D Ganchimeg ◽

BI Pisarsky ◽

D Oyuntsetseg ◽

GI Orgilyanov ◽

...

Keyword(s):

Active Faults ◽

Continental Rift ◽

The Other ◽

Earth’S Crust ◽

Large Block ◽

Thermal Waters ◽

Deep Faults ◽

Rift Zones ◽

Earth's Crust ◽

Academy Of Sciences

Khangay neotectonic uplift is a large block of the earth’s crust confined to the area between two sublatitudinal deep faults (Bulnay and Goby-Altay). They are active faults accommodating main compression stresses in contract to the extension existed in the other area of the Khangay uplift. In contrast to continental rift zones of Khangay it is the region of compression. It is area with the increased values of the heat flux.DOI: http://dx.doi.org/10.5564/pmas.v0i4.48 Proceedings of the Mongolian Academy of Sciences 2009 No 4 pp.64-70

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Magma-compensated crustal thinning in continental rift zones

Nature ◽

10.1038/nature07688 ◽

2009 ◽

Vol 457 (7231) ◽

pp. 873-876 ◽

Cited By ~ 131

Author(s):

H. Thybo ◽

C. A. Nielsen

Keyword(s):

Continental Rift ◽

Crustal Thinning ◽

Rift Zones

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Extension parallel to the rift zone during segmented fault growth: application to the evolution of the NE Atlantic

Solid Earth ◽

10.5194/se-8-1161-2017 ◽

2017 ◽

Vol 8 (6) ◽

pp. 1161-1180 ◽

Cited By ~ 6

Author(s):

Alodie Bubeck ◽

Richard J. Walker ◽

Jonathan Imber ◽

Robert E. Holdsworth ◽

Christopher J. MacLeod ◽

...

Keyword(s):

Rift Zone ◽

Three Dimensional ◽

Vertical Axis ◽

Second Order ◽

Continental Rift ◽

Normal Faults ◽

Ne Atlantic ◽

Zone Development ◽

Rift Zones ◽

Fault Growth

Abstract. The mechanical interaction of propagating normal faults is known to influence the linkage geometry of first-order faults, and the development of second-order faults and fractures, which transfer displacement within relay zones. Here we use natural examples of growth faults from two active volcanic rift zones (Koa`e, island of Hawai`i, and Krafla, northern Iceland) to illustrate the importance of horizontal-plane extension (heave) gradients, and associated vertical axis rotations, in evolving continental rift systems. Second-order extension and extensional-shear faults within the relay zones variably resolve components of regional extension, and components of extension and/or shortening parallel to the rift zone, to accommodate the inherently three-dimensional (3-D) strains associated with relay zone development and rotation. Such a configuration involves volume increase, which is accommodated at the surface by open fractures; in the subsurface this may be accommodated by veins or dikes oriented obliquely and normal to the rift axis. To consider the scalability of the effects of relay zone rotations, we compare the geometry and kinematics of fault and fracture sets in the Koa`e and Krafla rift zones with data from exhumed contemporaneous fault and dike systems developed within a > 5×104 km2 relay system that developed during formation of the NE Atlantic margins. Based on the findings presented here we propose a new conceptual model for the evolution of segmented continental rift basins on the NE Atlantic margins.

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The prerifting stage in the evolution of continental rift zones

Tectonophysics ◽

10.1016/0040-1951(87)90089-8 ◽

1987 ◽

Vol 143 (1-3) ◽

pp. 201-208

Author(s):

A.V. Razvalyaev

Keyword(s):

Continental Rift ◽

Rift Zones

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Deformation and seismicity associated with continental rift zones propagating toward continental margins

Geochemistry Geophysics Geosystems ◽

10.1029/2011gc003927 ◽

2012 ◽

Vol 13 (1) ◽

pp. n/a-n/a ◽

Cited By ~ 15

Author(s):

V. Lyakhovsky ◽

A. Segev ◽

U. Schattner ◽

R. Weinberger

Keyword(s):

Continental Rift ◽

Continental Margins ◽

Rift Zones

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The Triassic metabasalts of Dudin Krs, near Kosovska Mitrovica, Serbia

Geoloski anali Balkanskog poluostrva ◽

10.2298/gabp0301085m ◽

2003 ◽

pp. 85-91 ◽

Cited By ~ 2

Author(s):

Emin Memovic ◽

Vladica Cvetkovic ◽

Vera Knezevic ◽

Guram Zakariadze

Keyword(s):

Continental Slope ◽

Middle Triassic ◽

Volcanic Rocks ◽

Continental Rift ◽

Geochemical Characteristics ◽

Rift Zones

This paper presents the geochemical characteristics of the metabasalts of Dudin Krs, near Kosovska Mitrovica. The Dudin Krs is the easternmost occurrence of Middle Triassic rift-related volcanic rocks in the Dinarides. Generally, these rocks show similarities to other Triassic volcanic rocks of the Dinarides. They are high-magnesian, ol and ne-normative basalts, with low Zr/Nb and medium/low Ti/Zr and Ti/Y ratios. They exhibit transitional geochemical characteristics, between E-MORB and subalkaline basalts of continental rift zones. Their presence and geochemical affinity is evidence of rifting processes along the continental slope of the Adria block during Middle Triassic.

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