Terrestrial heat flow and lithospheric thermal structure in the Chagan Depression of the Yingen‐Ejinaqi Basin, north central China

2020 ◽  
Vol 32 (6) ◽  
pp. 1328-1346
Author(s):  
Yinhui Zuo ◽  
Shu Jiang ◽  
Shihu Wu ◽  
Wei Xu ◽  
Jiong Zhang ◽  
...  
Keyword(s):  
Heat Flow ◽  
Thermal Structure ◽  
Central China ◽  
North Central ◽  
Terrestrial Heat Flow ◽  
Lithospheric Thermal Structure

scholarly journals Present-day geothermal regime of the Uliastai Depression, Erlian Basin, North China

2018 ◽  
Vol 37 (2) ◽  
pp. 770-786 ◽  
Author(s):  
Wei Xu ◽  
Shaopeng Huang ◽  
Jiong Zhang ◽  
Ruyang Yu ◽  
Yinhui Zuo ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Heat Flow ◽  
Thermal Structure ◽  
Rheological Characteristic ◽  
Rheological Parameter ◽  
Lithospheric Thickness ◽  
Terrestrial Heat Flow ◽  
Geothermal Regime ◽  
Mantle Heat Flow ◽  
Erlian Basin

In this study, we calculated the present-day terrestrial heat flow of the Uliastai Depression in Erlian Basin by using systematical steady-state temperature data obtained from four deep boreholes and 89 thermal conductivity measurements from 22 boreholes. Then, we calculated the lithospheric thermal structure, thermal lithospheric thickness, and lithospheric thermo-rheological structure by combining crustal structure, thermal conductivity, heat production, and rheological parameter data. Research from the Depression shows that the present-day terrestrial heat flow ( qs) is 86.3 ± 2.3 mW/m2, higher than the average of 60.4 ± 12.3 mW/m2 of the continental area of China. Mantle heat flow ( qm) in the Depression ranges from 33.7 to 39.3 mW/m2, qm/ qs ranges from 40 to 44%, show that the crust plays the dominant position in the terrestrial heat flow. The thermal thickness of the lithosphere is about 74–88 km and characterized by a “strong crust–weak mantle” rheological characteristic. The total lithospheric strength is 1.5 × 1012 N/m under wet mantle conditions. Present-day geothermal regime indicates that the Uliastai Depression has a high thermal background, the activity of the deep-seated lithosphere is relatively intense. This result differs significantly from the earlier understanding that the area belongs to a cold basin. However, a hot basin should be better consistent with the evidences from lithochemistry and geophysical observations. The results also show the melts/fluids in the study area may be related to the subduction of the Paleo-Asian Ocean. The study of the geothermal regime in the Uliastai Depression provides new geothermal evidence for the volcanic activity in the eastern part of the Central Asian Orogenic Belt and has significant implications for the geodynamic characteristics.

Terrestrial heat flow and crustal thermal structure in the northern slope of Tazhong uplift in Tarim Basin

Geothermics ◽  
2020 ◽  
Vol 83 ◽  
pp. 101709
Author(s):  
Yuchen Liu ◽  
Nansheng Qiu ◽  
Huili Li ◽  
Anlai Ma ◽  
Jian Chang ◽  
...  
Keyword(s):  
Heat Flow ◽  
Tarim Basin ◽  
Thermal Structure ◽  
Northern Slope ◽  
Terrestrial Heat Flow ◽  
Crustal Thermal Structure ◽  
Tazhong Uplift

Terrestrial heat flow and crustal thermal structure of the Gonghe-Guide area, northeastern Qinghai-Tibetan plateau

Geothermics ◽  
2018 ◽  
Vol 72 ◽  
pp. 182-192 ◽  
Author(s):  
Chao Zhang ◽  
Guangzheng Jiang ◽  
Yizuo Shi ◽  
Zhuting Wang ◽  
Yi Wang ◽  
...  
Keyword(s):  
Heat Flow ◽  
Tibetan Plateau ◽  
Thermal Structure ◽  
Terrestrial Heat Flow ◽  
Crustal Thermal Structure

scholarly journals Regional estimation of Curie-point depths and succeeding geothermal parameters from recently acquired high-resolution aeromagnetic data of the entire Bida Basin, north-central Nigeria

2017 ◽  
Vol 5 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Levi I. Nwankwo ◽  
Abayomi J. Sunday
Keyword(s):  
High Resolution ◽  
Heat Flow ◽  
Curie Point ◽  
Thermal Structure ◽  
Geothermal Gradient ◽  
North Central ◽  
Geodynamic Processes ◽  
Regional Estimation ◽  
Heat Flow Variations ◽  
Geothermal Parameters

<p><strong>Abstract.</strong> A regional estimation of Curie-point depths (CPDs) and succeeding geothermal gradients and subsurface crustal heat flow has been carried out from the spectral centroid analysis of the recently acquired high-resolution aeromagnetic (HRAM) data of the entire Bida Basin in north-central Nigeria. The HRAM data were divided into 28 overlapping blocks, and each block was analysed to obtain depths to the top, centroid, and bottom of the magnetic sources. The depth values were then used to assess the CPD, geothermal gradient, and subsurface crustal heat flow in the basin. The result shows that the CPD varies between 15.57 and 29.62<span class="thinspace"></span>km with an average of 21.65<span class="thinspace"></span>km, the geothermal gradient varies between 19.58 and 37.25<span class="thinspace"></span>°C<span class="thinspace"></span>km<sup>−1</sup> with an average of 27.25<span class="thinspace"></span>°C<span class="thinspace"></span>km<sup>−1</sup>, and the crustal heat flow varies between 48.41 and 93.12<span class="thinspace"></span>mW<span class="thinspace"></span>m<sup>−2</sup> with an average of 68.80<span class="thinspace"></span>mW<span class="thinspace"></span>m<sup>−2</sup>. Geodynamic processes are mainly controlled by the thermal structure of the Earth's crust; therefore this study is important for appraisal of the geo-processes, rheology, and understanding of the heat flow variations in the Bida Basin, north-central Nigeria.</p>

Thermal data collection in and around Japan and its implications for lithospheric rheology and deformation

2020 ◽  
Author(s):  
Akiko Tanaka
Keyword(s):  
Heat Flow ◽  
Data Collection ◽  
Depth Distribution ◽  
Thermal State ◽  
Thermal Structure ◽  
Geothermal Gradient ◽  
Geological Processes ◽  
Thermal Data ◽  
Lithospheric Thermal Structure ◽  
Geochemical Constraints

&lt;p&gt;Heat flow data contribute to the imaging the lithospheric thermal structure, which greatly influences tectonic and geological processes and constrains the strength of the lithosphere, the modes of deformation, and the depth distribution of earthquakes. To provide more reliable estimation of the lithospheric thermal structure, some complementary approaches are possible. One of approaches is to update and incorporate the existing thermal data. A new version of database &amp;#8220;Thermal Data Collection in and around Japan&amp;#8221;, which contains continuously updated of heat flow and geothermal gradient data and adds thermal conductivity data in and around Japan, has been released in March 2019 [https://www.gsj.jp/data/G01M/GSJ_MAP_TDCJ_2019.zip]. This provides an opportunity to revisit the thermal state of the lithosphere along with other geophysical/geochemical constraints and on the lithospheric rheology and deformation, which is sensitive to temperature.&lt;/p&gt;

Heat flow and deep lithospheric thermal structure at Lac de Gras, Slave Province, Canada

2004 ◽  
Vol 31 (12) ◽  
pp. n/a-n/a ◽  
Author(s):  
J. C. Mareschal ◽  
A. Nyblade ◽  
H. K. C. Perry ◽  
C. Jaupart ◽  
G. Bienfait
Keyword(s):  
Heat Flow ◽  
Thermal Structure ◽  
Slave Province ◽  
Lithospheric Thermal Structure
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