Results 81 to 90 of about 5,732,959 (308)

Geochemical and sedimentological characteristics of the late quaternary sediments of the Anambra Basin [PDF]

, 2018
Ten samples from sand bars, mouth bars and continental shelf at the Onitsha end of the River Niger were analyzed for their sedimentlogical and geochemical characteristics.
Okiotor, M.E., Ogueh, E.D., Ighodaro, J.E., Nnaji, M.I.E.   +3 more
core   +1 more source

Geochemistry and Geochronology of Magmatic Rocks in Southwestern and Northeastern Cambodia: Implications for the Tectonic Evolution and Metallogenesis of the Loei Fold Belt

Geological Journal, EarlyView.
The composition of intrusive rocks suggests that the magma was likely generated in a subduction‐related setting. The arc crustal thickness in the Phnom Sro Ngam and Halo Prospects was probably < 40 km during emplacement. Zircon U–Pb age range indicates a correlation with Loei Fold Belt magmatic activity.
Sirisokha Seang, Khin Zaw, Kakda Kret, Ivan Belousov, Kotaro Yonezu, Koichiro Watanabe, Charles Makoundi   +6 more
wiley   +1 more source

Late Pleistocene Volcanic Rocks From Tengchong Volcanic Field at SE Tibetan Plateau: Constraints on Petrogenesis and Mantle and Crustal Processes

Geological Journal, EarlyView.
Early zircon saturation and crystallisation occur in mafic (52–54 wt.% SiO2) lavas at Tengchong volcanic field. These early formed zircons with high δ18O (6.6‰–7.9‰) indicates mantle enrichment by subducted supracrustal materials. ABSTRACT Late Pleistocene (< 0.2 Ma) mafic and evolved volcanic rocks occur in northern Tengchong Volcanic Field, SE ...
Lizhu Wang, Haibo Zou
wiley   +1 more source

Geochemical characteristics and evolution model of deep-layer No. 8 coal rock water in Ordos Basin

Meitan xuebao
Deep coal-rock gas wells typically characterized by high initial water production that declines or ceases in later stages, along with high salinity of the produced water.
Minfang YANG, Huaichang WANG, Honglin LIU, Daojun HUANG, Jing LU, Wenguang TIAN, Ke ZHANG, Peng TIAN   +7 more
doaj   +1 more source

Extraction of Surface Soil Geochemical Characteristics of Element Concertation by Principal Component Analysis

Journal of MMIJ, 2018
Understanding the geochemical characteristics of various soils is significant for revealing the mechanisms occurring under natural conditions, assessing the environmental risks and managing the land use.
Kengo NAKAMURA, Tatsu KUWATANI, Takeshi KOMAI, Shin-ichi YAMASAKI   +3 more
doaj   +1 more source

A Reassessment of Petrochemistry of ~1.2 Ga Tonalitic Rocks of the Northern Tugela Terrane, Natal Metamorphic Belt, South Africa: Further Constraints on the Evolution of This Belt

Geological Journal, EarlyView.
Our petrochemical studies on ~1.2 Ga granitoids of the Natal Metamorphic Belt, South Africa, do not suggest any property similar to Phanerozoic‐style subduction‐related granitoids. Plot of Kotongweni Tonalite in Y versus Sr diagram (after Moyen 2011), note that most samples have Sr/Y < 50.
Palesa Leuta, Saumitra Misra, Thembiso O. Basupi   +2 more
wiley   +1 more source

Geochemical Characteristics of Rare Earth Elements in Deep Geological Profile of Qitianling Intrusion, Hunan Province

Yankuang ceshi, 2014
Baishidu-Feixianzhen profile in Qitianling intrusion of Hunan Province is one of the most important profiles carried out in Sinoprobe. Despite the fact that a large amount of previous research had been carried out using various methods on rare earth ...
HE Han-han, LI Jian-kang, LI Chao, SU Xiao-yun, ZHAO Zhi, ZHANG Yi-jun, WANG Guo-rui   +6 more
doaj  

A geochemical evaluation method for geological sweet spots of marine-continental transitional shale gas: A case study of the Shan\begin{document}$^3_2 $\end{document} Sub-member, eastern margin of the Ordos Basin

Meitian dizhi yu kantan
BackgroundChina boasts abundant marine-continental transitional shale gas resources. However, marine-continental transitional shales in the country exhibit complex geological conditions characterized by rapid lateral facies transition, vertical ...
Xingcheng ZHU, Yong LI, Jungang LU, Qingbo HE, Shuxin LI, Zhenglu XIAO, Xiang LI, Qijun JIANG   +7 more
doaj   +1 more source

DataSheet3_Extracting the geochemical characteristics of magmas in different global tectono-magmatic settings using sparse modeling.xlsx

, 2022
In this study, key geochemical features of magmas formed in eight different tectono-magmatic settings (mid-ocean ridges, oceanic islands, oceanic plateaus, continental flood basalt provinces, intra-oceanic arcs, continental arcs, island arcs, and back ...
Kenta Ueki (12869264), Tatsu Kuwatani (3472430), Hideitsu Hino (3633196)   +2 more
core   +1 more source

Characteristics of Gravity Flow Deposits in the Benin Basin (Benin) and Implications for Oil and Gas Exploration

Geological Journal, EarlyView.
This study reveals that the underexplored Benin Basin features a narrow shelf and steep slope, which promoted the development of multi‐phase, stacked channel‐lobe complexes. These gravity flow deposits, further enhanced by bottom current reworking, reveal a significant undiscovered Upper Cretaceous stratigraphic play with considerable petroleum ...
Liu Zuodong, Wen Zhixin, Song Chenpeng, Wang Xueling, Shen Yiping   +4 more
wiley   +1 more source