Results 11 to 20 of about 22,333 (258)

Petrogenesis of Very‐Low‐Ti Basalts Returned by Chang'e‐6 From the Lunar Farside

open access: yesGeophysical Research Letters
Lunar volcanism provides critical insights into the Moon's thermochemical evolution. We present petrological and geochemical analyses of six very‐low‐Ti (VLT) basalt fragments from Chang'e‐6 (CE6) samples. These basalts yield a Pb‐Pb age of around 2.9 Ga,
Shitou Wu   +14 more
doaj   +2 more sources

Preliminary Appraisal of a Correlation Between Glaciations and Large Igneous Provinces Over the Past 720 Million Years

open access: yesGeophysical Monograph Series, Page 169-190., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Nasrrddine Youbi   +9 more
wiley  

+1 more source

Mineralogy and Geochemistry of “Laoshan Jade” from Shandong Province, China: Implications for Petrogenesis

open access: yesCrystals, 2022
“Laoshan Jade” is located in the Yangkou area of the Sulu UHP metamorphic belt. This is the first time a systematic research study is performed on its conventional gemological characteristics, mineral compositions, geochemical characteristics, and ...
Xiaomin Yu, Yingxin Liu, Chuqi Cao
doaj   +1 more source

Zircon U-Pb and Lu-Hf Isotopic Dating of Magmatic Rocks in the Wunugetushan Porphyry Copper-Molybdenum Deposit, Inner Mongolia

open access: yesYankuang ceshi, 2022
BACKGROUND The Wunugetushan copper-molybdenum deposit located in the northwest of the Erguna—Hulun fault is a large porphyry copper-molybdenum deposit. Magmatic rocks are widespread in the mining area. OBJECTIVES In order to determine the emplacement age
ZHANG Xuejun   +6 more
doaj   +1 more source

Batholith recorded mesozoic multistage tectonic evolution of the South china block: A case study of the guandimiao intrusions

open access: yesFrontiers in Earth Science, 2022
South China is a well-known grand felsic igneous rocks province. However, it is still controversial and not well understood whether the Mesozoic tectono-magmatic pattern is dominated by the subduction of the paleo-Pacific oceanic plate. In this study, we
Jin-Hua Qin, Fan Huang, Deng-Hong Wang
doaj   +1 more source

Geochemistry and Petrogenesis of Mata Lower Jurassic basaltic rocks, Southeast Kerman, Implication to Southern Sanandaj-Sirjan zone evolution [PDF]

open access: yesپترولوژی, 2019
Lower Jurassic volcanic-sedimentary sequence in the southern end of the Sanandaj-Sirjan zone, north of Mata village (southwest Jiroft), composed of tuffaceous limestone, calcareous tuff, limestone, including felsic volcaniclastic and basaltic volcanic ...
Zahra Badrzadeh
doaj   +1 more source

High‐Pressure Na‐Ca Carbonates in the Deep Carbon Cycle

open access: yesGeophysical Monograph Series, Page 127-136., 2020

This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.

Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions

Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Sergey Rashchenko   +2 more
wiley  

+1 more source

Earth's Earliest Phaneritic Ultramafic Rocks: Mantle Slices or Crustal Cumulates?

open access: yesGeochemistry, Geophysics, Geosystems, 2022
When plate tectonics initiated remains uncertain, partly because many signals interpreted as diagnostic of plate tectonics can be alternatively explained via hot stagnant‐lid tectonics.
Jiawei Zuo   +10 more
doaj   +1 more source

Influence of Petrogenesis on the Engineering Properties of Ultramafic Aggregates and on Their Suitability in Concrete

open access: yesApplied Sciences, 2022
This study focuses on the use of petrology as a useful tool in construction applications (i.e., concrete). More specifically, this study investigates how the petrogenetic characteristics of ultramafic rocks derived from ophiolite complexes (Veria–Naousa,
Petros Petrounias   +8 more
doaj   +1 more source

Late Jurassic Haobugao granites from the southern Great Xing’an Range, NE China: Implications for postcollision extension of the Mongol–Okhotsk Ocean

open access: yesOpen Geosciences, 2023
The Mongolia-Okhotsk tectonic regime had a significant impact on the tectonic evolution of Northeastern (NE) China. However, there is no consensus on the role of this regime in the geological evolution of the Xing’an Massif during the late Mesozoic. This
Li Jianda, Tian Yue, Cheng Yuqi
doaj   +1 more source

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