Results 1 to 10 of about 462 (44)

Preliminary Petrological and Geochemical Studies of Dolerite Dikes at the Kara Astrobleme Central Uplift, Comparison with UHPHT Impact Melt Glasses (Pay-Khoy, Russia)

IOP Conference Series: Earth and Environment, 2021
Recent find of the ultra-high pressure high-temperature (UHPHT) impact melt glasses among the impactites of the Kara astrobleme has a high interest in nicely preserved 70 Ma glass with potentially unusual structure and properties.
T. Shumilova, Aleksey Morokhin, A. Zubov, R. Shaybekov   +3 more
semanticscholar   +1 more source

Geochemical Characteristics and Geological Significance of the Shangsu Mafic Dikes in Jiangxi

Minerals, 2023
Mafic dikes are developed in the Shangsu region of Jiangxi, including Nanyuan Mountain and Mianhuaao. These dikes intrude into the Upper Triassic Anyuan Formation and are primarily composed of pyroxene, plagioclase, and opaque minerals, exhibiting a ...
Yang Huang, Xinyue Chen, Yujiang Xie
semanticscholar   +1 more source

Nature of Cretaceous dolerite dikes with two distinct trends in the Damodar Valley, eastern India: Constraints on their linkage to mantle plumes and large igneous provinces from 40Ar/39Ar geochronology and geochemistry

Lithosphere, 2019
Two distinct sets of Cretaceous dolerite dikes intrude the Chhotanagpur gneissic complex of eastern India, mostly within the Damodar Valley Gondwanan sedimentary basins.
R. Srivastava, Fei Wang, Wenbei Shi, A. K. Sinha, K. Buchan   +4 more
semanticscholar   +1 more source

Petrology and geochemistry of multiphase post-granitic dikes: A case study from the Gabal Serbal area, Southwestern Sinai, Egypt

Open Chemistry, 2022
Variable single and/or swarms of post-granitic dikes are widespread at Gabal Serbal, Southwestern Sinai, Egypt. The present article aims to identify and discriminate these multiphase dikes through detailed geological, petrographical, and geochemical ...
Mohamed salem Kamar, I. Salem, I. El-Aassy, Abdu A. El-Sayed, H. Awad, H. Tekin, Abdullah M. Alzahrai, E. R. Lasheen   +7 more
semanticscholar   +1 more source

Multiple Rodingitization Stages in Alkaline, Tholeiitic, and Calc-Alkaline Basaltic Dikes Intruding Exhumed Serpentinized Tethyan Mantle from Evia Island, Greece

Lithosphere, 2022
In Pagondas and Kimi areas, central Evia Island, Greece, variably serpentinized ultramafic rocks of an ophiolitic origin are crosscut by rodingite dikes.
C. Karkalis, A. Magganas, P. Koutsovitis, P. Pomonis, T. Ntaflos   +4 more
semanticscholar   +1 more source

Coexistence of MORB- and OIB-like dolerite intrusions in the Purang ultramafic massif, SW Tibet: A paradigm of plume-influenced MOR-type magmatism prior to subduction initiation in the Neo-Tethyan lithospheric mantle

GSA Bulletin, 2019
The Yarlung Zangbo Suture Zone (YZSZ) of South Tibet is divided by the ZhongbaZhada terrane into two subparallel ophiolitic belts in its western end. The peridotite massifs of the southern belt tectonically overlie the Tethyan Himalaya sequence.
Hao Zheng, Qiang-tai Huang, Argyrios N. Kapsiotis, D. Lenaz, M. Velicogna, Chi Xu, Chen Cheng, B. Xia, Weiliang Liu, Yang Xiao, Peng Yang   +10 more
semanticscholar   +1 more source

Paleomagnetism of the dike systems in Finland IV: Remanent magnetization of the dolerite and related dikes in the Åland archipelago

, 1969
The dikes of the area can be divided into three groups having different directions of remanent magnetization after demagnetization in the AC field. One of these groups has a direction which coincides with that measured for the Jotnian dolerites in the ...
K. Neuvonen, L. Grundström
semanticscholar   +1 more source

PLUME-GENERATED 90° STRESS CHANGE LINKED TO TRANSITION FROM RADIATING TO CIRCUMFERENTIAL DOLERITE DIKE SWARMS OF THE SIBERIAN TRAPS LARGE IGNEOUS PROVINCE AND TO EMPLACEMENT OF THE NORILSK-TALNAKH ORE DEPOSITS

Economic Geology
A 90° change in stress orientation has been previously proposed as the trigger for the final emplacement of the world-class Norilsk-Talnakh magmatic sulfide mineralization via the migration of accumulated sulfide melts from elsewhere within the ...
R. Ernst, H. El Bilali, K. Buchan, S. Jowitt   +3 more
semanticscholar   +1 more source

Melt evolution of upper mantle peridotites and mafic dikes in the northern ophiolite belt of the western Yarlung Zangbo suture zone (southern Tibet)

, 2018
The Yarlung Zangbo suture zone (YZSZ) in southern Tibet is divided by the Zhongba terrane into two subparallel belts in its western end. The northern belt (NB) is tectonically juxtaposed against an accretionary prism complex and the Gangdese magmatic arc
Fei Liu, Y. Dilek, Yanxue Xie, Jingsui Yang, D. Lian   +4 more
semanticscholar   +1 more source

Chemical and Sr-Nd compositions and 40Ar/39Ar ages of NW-trending dolerite dikes of Burkina Faso: Evidence for a Mesoproterozoic magmatism in the West African Craton

Geoscience Frontiers, 2018
Boukare Tapsoba, C. Lo, U. Wenmenga, Y. Iizuka, Sun‐Lin Chung, G. Shellnutt   +5 more
semanticscholar   +1 more source