Results 51 to 60 of about 1,407 (268)

Mesozoic–Cenozoic Thermochronology of the Tarim–Southern Tianshan System, NW China

Geological Journal, EarlyView.
Tectonothermal history of the Tarim–Southern Tianshan system compared with the major tectonic events at far‐field plate margins. ABSTRACT The Tarim Basin, an oil‐bearing basin in northwest China, is tectonically and sedimentologically linked to the Southern Tianshan Orogenic Belt.
Shuangfeng Zhao, Wen Chen, Jingbo Sun, Ze Shen, Jie Zhang   +4 more
wiley   +1 more source

Lake–Groundwater Biogeochemical Interactions in a River‐Delimited System: The Groundwater and Lakes Urban Observatory (GLUO)

International Review of Hydrobiology, EarlyView.
ABSTRACT Preservation of urban aquatic ecosystems is of primary importance for human well‐being, biodiversity protection and the future of society. Lake–groundwater–river interactions within urban floodplains harbour intrinsic fragility, yet remain largely understudied.
Marlene Dordoni, Andreas Musolff, Kay Knöller, Luisa Coder, Martin Krauss, Yvonne Rosenlöcher, Olaf Büttner, Jörg Tittel   +7 more
wiley   +1 more source

Petrogenesis of the paleoproterozoic ultramafites in Wuchuan area, Inner Mongolia: implications for tectonic evolution

Frontiers in Earth Science
IntroductionThe east-west trending Khondalite Belt, located on the northern margin of the North China Craton, is linked to the Paleoproterozoic Columbia supercontinent’s evolution.
Hao Hu, Dongyan Zhong, Zhiguang Zhou, Guosheng Wang, Shen Gao, Jianfeng Chen, Chenfei Feng   +6 more
doaj   +1 more source

The mineral and isotopic signatures of glacially eroded sediments exported from Hudson Strait to the Labrador Sea during Hudson Strait Heinrich events H0 to H4

Journal of Quaternary Science, EarlyView.
ABSTRACT The sediment signature of glacial erosion products exported from Hudson Strait to the Labrador Sea during Hudson Strait Heinrich (HS‐H) events is evaluated using four distinct proxies: paired δ18Ο and δ13C data on the carbonate fraction, εNd and U–Pb isotopes in the silicate fraction, the mineral composition of the <2 mm bulk sediment fraction,
John T. Andrews, David J. W. Piper, Matthew E. Kirby, Donald C. Barber   +3 more
wiley   +1 more source

Metamorphic Inheritance, Lower‐Crustal Earthquakes, and Continental Rifting

Geochemistry, Geophysics, Geosystems
The Malawi Rift is localized within Precambrian amphibolite‐granulite facies metamorphic belts, bounded by up to 150 km long border faults, and generates earthquakes throughout ∼40 km thick crust.
Å. Fagereng, J. F. A. Diener, C. J. Tulley, B. Manda   +3 more
doaj   +1 more source

Electron Microprobe Reintegration Method for Clinopyroxene Breakdown with Lamellae Exsolution

Yankuang ceshi
Pyroxene is an important rock-forming mineral in magmatic to metamorphic rocks, which often possesses certain breakdown texture with lamellae exsolution under temperature and pressure changes.
Xiaoli LI, Lifei ZHANG
doaj   +1 more source

Volcanostratigraphic Sequences of Kebo-Butak Formation at Bayat Geological Field Complex, Central Java Province and Yogyakarta Special Province, Indonesia

Indonesian Journal on Geoscience, 2016
DOI:10.17014/ijog.3.2.77-94Bayat Complex is usually used as a work field for students of geology and other geosciences. The study area is located in the southern part of the Bayat Complex.
Sri Mulyaningsih
doaj   +1 more source

Raman Study of the Slobodka Ordinary Chondrite

Journal of Raman Spectroscopy, EarlyView.
The texture and mineral chemistry of Slobodka are most consistent with L4 chondrites, exhibiting strong shock metamorphism characteristic of shock stage S4, including irregular and planar fractures, undulatory extinction, and mosaicism in olivine, pyroxene, and plagioclase.
M. Simopoulou, I. Baziotis, L. Ferrière, J. Hu, C. Sanchez‐Valle, P. N. Gamaletsos, D. Palles, J. Berndt, C. Ma, S. Klemme, P. D. Asimow   +10 more
wiley   +1 more source

Petrography and mineral chemistry of metamorphosed mantle peridotites of Nain Ophiolite (Central Iran)

Journal of Economic Geology, 2017
Introduction Study of the petrology of the ophiolites as the relics of ancient oceanic lithosphere, is a powerful tool to reconstruct Earth’s history. Mantle peridotites have mostly undergone alteration and serpentinization to some extent.
Nargess Shirdashtzadeh, Ghodrat Torabi, Ramin Samadi   +2 more
doaj   +1 more source

Assessing Thermal Maturity of the Pendência Formation (Potiguar Basin) Using Vitrinite Reflectance and Raman Spectroscopy

Journal of Raman Spectroscopy, EarlyView.
Palynofacies assemblages from the onshore Potiguar Basin display a wide thermal maturity range, with vitrinite reflectance (%Ro) values of 0.46–2.72 measured from nine samples at depths of 1059–4443 m. A strong correlation exists between %Ro and Raman parameters, specifically the G‐band's full width at half maximum.
Gabriel A. Barberes, Dalva A. L. Almeida, Flávia C. Marques, Julliana F. Alves, Paulo H. M. Toledo, Rafael de Oliveira, Lenize F. Maia, Linus Pauling F. Peixoto, Antonio Carlos Sant'Ana, Celly M. S. Izumi, Gustavo F. S. Andrade, Dorval C. Dias Filho, Taissa R. Menezes, Delano M. Ibanez, Luiz Fernando C. de Oliveira   +14 more
wiley   +1 more source