Results 51 to 60 of about 18,782 (249)

Palaeoproterozoic magnesite: lithological and isotopic evidence for playa/sabkha environments [PDF]

, 2001
Magnesite forms a series of 1- to 15-m-thick beds within the approximate to2.0 Ga (Palaeoproterozoic) Tulomozerskaya Formation, NW Fennoscandian Shield, Russia.
Fallick, A.E., Anthony E. Fallick, Fallick, A., Vladimir V. Makarikhin, Medvedev, P.V., Makarikhin, V.V., Victor A. Melezhik, Melezhik, V.A., Pavel V. Medvedev   +8 more
core   +1 more source

Decoupling climate and human impacts on the nitrogen cycle during the Irish Bronze Age

Journal of Quaternary Science, EarlyView.
ABSTRACT Disentangling climate variability and human activity in past nitrogen cycling is key to understanding ecosystems. Previous studies in Ireland observed a widespread, permanent shift in terrestrial nitrogen cycling during Later Prehistory, potentially linked to intensifying land‐use.
Sarah Ferrandin, Gill Plunkett, Neil Ogle   +2 more
wiley   +1 more source

Diagenesis of organic-rich shale in Second Member of Kongdian Formation in Cangdong Sag and its influence on reservoir characteristics

Youqi dizhi yu caishoulu
The diagenesis and evolution of organic-rich shale have an important influence on the characteristics of shale reservoirs， but the relationship between diagenesis and reservoir characteristics of organic-rich shale in the Second Member of Kongdian
FENG Guozheng, YAN Jihua, PU Xiugang, CHEN Shiyue, YIN Lingzhi, LA Weihao, HAN Wenzhong, ZHANG Wei   +7 more
doaj   +1 more source

Role of authigenic clay minerals in preserving primary porosity and permeability of the sandstone hydrocarbon reservoirs [PDF]

Journal of Stratigraphy and Sedimentology Researches, 2019
Among different diagenetic alterations, quartz cements are the foremost porosity and permeability destroying cement in deeply buried (>2 km) sandstones.
Masoumeh Kordi
doaj   +1 more source

Diagenetic Study of Marrón Emperador Ornamental Stone (Upper Cretaceous, SE Spain)

Applied Sciences, 2023
The “Marrón Emperador” ornamental stone is known for its characteristic deep brown colour filled with white spots and veins. It consists of a brecciated dolostone with different generations of calcite/dolomite veins and veinlets that represent repeated ...
María Concepción Muñoz-Cervera, Juan Carlos Cañaveras   +1 more
doaj   +1 more source

Cementation scenarios for New Zealand Cenozoic nontropical limestones

, 1996
Cenozoic limestones are widely distributed in New Zealand, especially in the Oligocene-earliest Miocene in both islands, and the Pliocene-Pleistocene in North Island.
Nelson, Campbell S., Hood, Steven D., Campbell S. Nelson, Steven D. Hood   +3 more
core   +1 more source

Adsorption of tetracyclines on marine sediment during organic matter diagenesis [PDF]

, 2013
The effect of decomposition and diagenesis of sediment organic matter (SOM) on the adsorption of emerging pollutants by the sediment has been seldom addressed.
Fei, YH, Li, XY
core   +1 more source

Next‐Generation Paleopathology: Using Commercial AI in Bioarchaeological Diagnosis

International Journal of Osteoarchaeology, EarlyView.
ABSTRACT Artificial intelligence encompasses computational systems capable of performing cognitive functions such as learning, reasoning, and problem‐solving. Within this domain, generative AI and large language models such as ChatGPT, Gemini, and Copilot have shown significant potential in clinical diagnostics.
Jessica Mongillo, Giulia Vescovo, Giulia Manzo, Nicoletta Zedda, Barbara Bramanti   +4 more
wiley   +1 more source

Diagenesis of marine-continental transitional shale from the Upper Permian Longtan Formation in southern Sichuan Basin, China

Open Geosciences
Upper Permian Longtan Formation transitional shale has become an important exploration layer, but the Longtan Formation shale (LFS) has a complex mineralogical composition, which affects the subsequent diagenesis and diagenetic evolution, and restricts ...
Yu Yu, Deng Xiaoliang, Deng Yuwei
doaj   +1 more source

Influence of differential diagenesis on pore evolution of the sandy conglomerate reservoir in different structural units: A case study of the Upper Permian Wutonggou Formation in eastern Junggar Basin, NW China

Open Geosciences, 2022
In order to study the differential diagenesis of sandy conglomerate reservoirs in different tectonic units in eastern Junggar Basin, and establish the differential temporal sequence of burial – diagenesis – hydrocarbon charging – pore evolution, the ...
Cao Jiangjun, Luo Jinglan, Madina Mawutihan, Sheng Weiyan, Mao Qianru, Yu Shaohui, Yang Tao   +6 more
doaj   +1 more source