scholarly journals Tectonic settings of continental crust formation: Insights from Pb isotopes in feldspar inclusions in zircon

Geology ◽  
2016 ◽  
Vol 44 (10) ◽  
pp. 819-822 ◽  
Author(s):  
Hélène Delavault ◽  
Bruno Dhuime ◽  
Chris J. Hawkesworth ◽  
Peter A. Cawood ◽  
Horst Marschall ◽  
...  
Keyword(s):  
Continental Crust ◽  
Pb Isotopes ◽  
Crust Formation ◽  
Tectonic Settings

Global factors of lead-zinc ore formation

2019 ◽  
pp. 3-10
Author(s):  
A. L. Dergachev
Keyword(s):  
Continental Crust ◽  
Island Arcs ◽  
Geological Time ◽  
Crust Formation ◽  
Ore Formation ◽  
Global Factor ◽  
Lead And Zinc ◽  
Lead Zinc ◽  
Cyclic Changes

Tectonic evolution of the Earth is a principle global factor responsible for uneven distribution of lead and zinc reserves in geological time. Cyclic changes in productivity of lead-zinc ore-formation processes resulted from periodical amalgamation of most blocks of continental crust, formation, stabilization and final break-up of supercontinents. Many features of age spectrums of lead and zinc reserves are caused by gradual increase of volume of continental crust resulting from accretion of island arcs to ancient cratons, widening of distribution of ensialic environments of ore-formation and increasing role of continental crust in magmatic processes.

Mechanism of Paleoarchean continental crust formation as archived in granitoids from northern part of Singhbhum Craton, eastern India

2020 ◽  
pp. SP489-2019-202
Author(s):  
Sukanta Dey ◽  
Sibani Kumari Nayak ◽  
Aniruddha Mitra ◽  
Keqing Zong ◽  
Yongsheng Liu
Keyword(s):  
Continental Crust ◽  
Eastern India ◽  
Crust Formation ◽  
Singhbhum Craton

The continental crust contributes to magmatic hydrothermal gold deposit in Ciemas, West Java, Indonesia: Constraints from Hf isotopes of zircons and in situ Pb isotopes of sulfides

2019 ◽  
Vol 112 ◽  
pp. 103010 ◽  
Author(s):  
Chengquan Wu ◽  
Zhengwei Zhang ◽  
Mega Fatimah Rosana ◽  
Qiao Shu ◽  
Chaofei Zheng ◽  
...  
Keyword(s):  
Gold Deposit ◽  
Continental Crust ◽  
Pb Isotopes ◽  
Hf Isotopes ◽  
West Java

Arc evolution and continental crust formation at the Izu–Bonin–Mariana arc system

2006 ◽  
Vol 70 (18) ◽  
pp. A638 ◽  
Author(s):  
Y. Tatsumi ◽  
N. Takahashi ◽  
S. Kodaira ◽  
Y. Kaneda
Keyword(s):  
Continental Crust ◽  
Crust Formation ◽  
Mariana Arc

Sm-Nd and Rb-Sr Chronology of Continental Crust Formation

Science ◽  
1978 ◽  
Vol 200 (4345) ◽  
pp. 1003-1011 ◽  
Author(s):  
M. T. McCulloch ◽  
G. J. Wasserburg
Keyword(s):  
Continental Crust ◽  
Crust Formation

U–Pb zircon ages and Nd, Sr, and Pb isotopes of lower crustal xenoliths from North China Craton: insights on evolution of lower continental crust

2004 ◽  
Vol 211 (1-2) ◽  
pp. 87-109 ◽  
Author(s):  
Yongsheng Liu ◽  
Shan Gao ◽  
Hongling Yuan ◽  
Lian Zhou ◽  
Xiaoming Liu ◽  
...  
Keyword(s):  
Continental Crust ◽  
North China Craton ◽  
North China ◽  
Pb Isotopes ◽  
Lower Continental Crust ◽  
Crustal Xenoliths ◽  
Lower Crustal

scholarly journals Seismotectonic-Geologic Hazards Zoning of Iran

2015 ◽  
Vol 19 (1) ◽  
pp. 7-13 ◽  
Author(s):  
Mehran Arian
Keyword(s):  
Continental Crust ◽  
B Value ◽  
Seismic Hazards ◽  
Moho Discontinuity ◽  
Earthquake Hazards ◽  
Font Size ◽  
Seismogenic Layer ◽  
Deep Earthquakes ◽  
Geologic Hazards ◽  
Tectonic Settings

<p class="MsoNormal"><span style="font-size: 10.0pt; font-family: Times; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman';">Seismotectonic-geologic hazards zoning map of Iran is drawn based on deterministic seismic hazards evaluation using the seismicity records, structural trends, tectonic settings, fault ruptures and neotectonics activities in Iran. This map has been prepared to indicate the seismotectonic-geologic hazards of Iran. It contains the earthquake hazards parameters such as b value and M<sub>max</sub> for the nineteen seismotectonic provinces. Furthermore, Moho discontinuity depth, seismogenic layer depths and seismic rates for all provinces are investigated. The majority of deformation in Iran has been concentrated in the continental crust of the country. Zagros and Alborz experience deep earthquakes that are an indication of existence of the thick-skinned tectonics. Finally, some provinces such as Piranshahr- Borojen, East Iran, Naien- Rafsanjan and East Alborz, which include main suture zones of Iran, have faced high seismic hazards.</span></p><p class="MsoNormal"><span style="font-size: 10.0pt; font-family: Times; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman';"><br /></span></p><p class="MsoNormal"><span style="font-size: 10.0pt; font-family: Times; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman';"><strong>Resumen</strong></span></p><p class="MsoNormal"><span style="font-size: 10.0pt; font-family: Times; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman';">Este estudio se realizó con el fin de preparar un mapa zonal de amenazas seismotectónicas y geológicas de Irán con base en la evaluación de amenazas sismícas deterministas a través de los registros sísmicos, las tendencias estructurales, las configuraciones tectónicas, las rupturas de fallas y la actividad neotectónica en Irán. Este mapa contiene los parámetros de amenaza sismológica como los valores b y M<sub>max</sub> para las 19 provincias sismotectónicas del país. Además, se investigó la profundidad de la Discontinuidad de Mohorovičić, las capas sismogénicas profundas y las clasificaciomes sísmicas para todas las provincias. La mayoría de la deformación de Irán está concentrada en la corteza continental del país. Las provincias de Zagros y Alborz experimentan terremotos profundos que indican la existencia de una configuración tectónica de capa gruesa. Finalmente, algunas provincias como Piranshahr-Borojen, Este de Irán, Naien-Rafsanjan y Este de Alborz, que incluyen las principales zonas de sutura de Irán, han enfrentado grandes riesgos sísmicos.</span></p>

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