Results 121 to 130 of about 140,105 (352)

Jurassic coal maceral and deposition rate of peat in the northern Qaidam Basin

open access: yes矿业科学学报, 2018
To reveal peat accumulation characteristics of Jurassic coal seams in northern Qaidam Basin,coal petrology of the main coal seams and spectral analysis of coal seam No.7 in Gaoquan open-pit mine were investigated.Results show that the volume of organic ...
Lu Jing   +4 more
doaj   +1 more source

A Global Plate Model Including Lithospheric Deformation Along Major Rifts and Orogens Since the Triassic [PDF]

open access: yes, 2019
Global deep‐time plate motion models have traditionally followed a classical rigid plate approach, even though plate deformation is known to be significant.
Bower, Dan J.   +9 more
core   +1 more source

Origins of the Pangkaimen Au Deposit in the Northern Great Xing'an Range, China: Evidence From Geochronological, Geochemical, Fluid Inclusion, and H–O–S–Pb Isotope Data

open access: yesGeological Journal, EarlyView.
The Pangkaimen Au–Ag deposits belong to the epithermal Au deposits, which are of great significance for guiding the research and development of this type of gold deposit. Metallogenic model diagram of Pangkaimen Au–Ag deposit. ABSTRACT The gold (Au) metallogenic belt in the northern Great Xing'an Range is characterised by the wide occurrence of the ...
Sheng Lu   +8 more
wiley   +1 more source

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

open access: yesGeological 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   +4 more
wiley   +1 more source

The earliest cowries: the origin of cypraeoid gastropods

open access: yesActa Palaeontologica Polonica
Cowries, the family Cypraeidae, form a diverse and conspicuous group of gastropods living in tropical to subtropical seas. Their shell is convolute (last whorl covers all previous ones) with a narrow, slit-like siphonate aperture bearing denticles ...
Alexander Nützel   +3 more
doaj   +1 more source

Combining Density Fractionation and Ca K‐Edge XANES Reveals Contrasting SOM–Mineral Association Patterns Shaped by Parent Material in Forest Soil O Horizons

open access: yesJournal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Background Soil organic matter (SOM) accumulation in forest soils is strongly influenced by interactions with inorganic constituents derived from parent material mineralogy. However, their role in the forest floor remains underexplored.
Gabriela Villalba‐Ayala   +3 more
wiley   +1 more source

Coal petrography characteristics and coal facies constraints of Kezilenur Formation coal seams in the northern tectonic belt of Kuqa Depression

open access: yesMeitan kexue jishu
Jurassic coal seams are widely developed in the northern tectonic belt of Kuqa Depression, Tarim Basin. Exploration and development practices in recent years show that the exploration potential of coalbed methane (CBM) resources in this area is huge, and
Ling LI   +8 more
doaj   +1 more source

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