Results 81 to 90 of about 5,261 (211)

Revisiting the origin and significance of the Paleoproterozoic complex in the Himalaya: new insights from apatite geochemistry

All Earth
This study examines the tectono-thermal evolution of the Paleoproterozoic complex in the Arun area, eastern Nepal, highlighting the role of apatite geochemistry, along with zircon U–Pb dating and whole-rock analyses.
Takeshi Imayama, Keewook Yi, Kazumasa Aoki   +2 more
doaj   +1 more source

Study on Iron Source and Original Mineral Assemblage of Iron Formation in Paleoproterozoic Wuzhiling Formation in North China [PDF]

, 2023
Bin Tang
openalex   +1 more source

Tables S1-S3: Geochemical and geochronological data of the Paleoproterozoic ophiolitic rocks in the northern Yangtze Craton, South China.

, 2020
Bo Huang
openalex   +1 more source

Improved resolution of Paleoproterozoic orogenesis: Multi-directional collision tectonics in the Sodankylä belt of northern Finland

, 2021
Mohammad Sayab, Raimo Lahtinen, Juha Köykkä, Pentti Hölttä, Tuomo Karinen, Tero Niiranen, Hanna Leväniemi   +6 more
openalex   +1 more source

Microbialite Niches Across the Archean and Paleoproterozoic

Geophysical Research Letters
Abstract Changes in microbialite abundance during the Archean and Paleoproterozoic have been attributed to a variety of environmental and biological factors, yet past work looking at large‐scale patterns of microbialite abundance generally assumes shallow marine deposition rather than incorporating specific settings.
C. M. Howard, N. D. Sheldon
openaire   +1 more source

Closed-System Oxygen Isotope Exchange in a Paleoproterozoic Evaporite Sequence [PDF]

, 2020
Haoran Ma, Yongbo Peng, Riho Motlep, Kalle Kirsimäe, Aleksander Romashkin, Aivo Lepland, Huiming Bao   +6 more
openalex   +1 more source

A biomarker and isotope study of Paleoproterozoic ecosystems in the northern Australian McArthur Basin

, 2021
Galina Vinnichenko
openalex   +1 more source

Ocean chemistry in the Paleoproterozoic

, 2019
The present-day oxidizing conditions at Earth's surface are due to the high oxygen content of the atmosphere. However, oxygen was not always stable in the terrestrial atmosphere. Two distinct periods during which oxygen increased in a step-like manner were required to reach the current atmospheric oxygen level.
openaire   +1 more source

U-Pb AGE OF ZIRCONS FROM PALEOPROTEROZOIC SECONDARY QUARTZITES OF THE BOLSHOI TYUTERS ISLAND AND FROM SANDY MATRIX OF EARLY RIPHEAN CONGLOMERATES OF THE GOGLAND ISLAND (GULF OF FINLAND): FEATURES OF THE PRE-RIPHEAN HIATUS IN SEDIMENTATION IN THE NORTHEAST OF THE EAST EUROPEAN PLATFORM

Геодинамика и тектонофизика
The paper presents the results of U-Pb isotope dating of zircons extracted from rocks of the southern part of the Baltic Shield (Early Riphean conglomerates and Paleoproterozoic secondary quartzites) and makes a comparison of these results with the ages ...
E. N. Terekhov, N. B. Kuznetsov, T. V. Romanyuk, M. A. Matveev, A. B. Makeev, A. S. Novikova, M. Yu. Gushchina, A. S. Dubenskiy, V. S. Sheshukov, A. A. Iurmanov   +9 more
doaj   +1 more source

A multi-scale, spatially-resolved textural and geochemical approach to interpreting Paleoproterozoic biosignatures [PDF]

, 2023
Erica Barlow, Brendan James Nomchong, Joshua M. Garber, Christopher H. House   +3 more
openalex   +1 more source