Results 91 to 100 of about 212,947 (357)

DEBRIS SOURCE AREA EVOLUTION DURING FORMATION OF THE URALIAN FOREDEEP AT THE SAKMARIAN STAGE OF THE EARLY PERMIAN ACCORDING TO U-Pb LA-ICP-MS ISOTOPE DATING OF DETRITAL ZIRCONS

Геодинамика и тектонофизика
The article presents the results of studying the sources of terrigenous material deposition in the Uralian foredeep according to U-Pb dating of detrital zircons from terrigenous rocks of four stratigraphic levels of the Kapysov formation (Sakmarian stage)
E. A. Volodina, A. V. Tevelev, A. A. Borisenko, E. V. Koptev, A. S. Novikova, А. S. Dubenskiy, K. G. Erofeeva   +6 more
doaj   +1 more source

Lake sedimentological and ecological response to hyperthermals : Boltysh impact crater, Ukraine [PDF]

, 2017
Acknowledgements Initial drilling of the Boltysh meteorite crater was funded by Natural Environment Research Council (NERC) grant NE/D005043/1. The authors are extremely grateful to the valuable scientific contributions of S. Kelley and I. Gilmour.
Andrews, Steven D., Ebinghaus, Alena, Jolley, David W., Kemp, David B.   +3 more
core   +1 more source

Temperature‐dependent shear behavior and constitutive model of the rock–concrete interface

Deep Underground Science and Engineering, EarlyView.
Shear tests were conducted to investigate the temperature‐dependent shear behavior of the rock–concrete interface, highlighting the interaction between the surrounding rock and the lining during tunnel fires. Under experimental conditions, concrete exhibited greater temperature sensitivity than rock, with the shear fracture surface transitioning from ...
Hongbin Chen, Yujing Jiang, Rui Pan, Bin Wang, Sunhao Zhang, Jinge Zhang, Xianzhuang Ma   +6 more
wiley   +1 more source

Geology of the Goodber Common area : 1:10 000 sheet SD66SW : part of 1:50 000 sheet 59 (Lancaster) [PDF]

, 1989
This report describes the geology of the 1:10,000 sheet SD 66 SW (Goodber Common), part of the 1:50,000 Series sheet 59 (Lancaster). The first geological survey of the area, at the 1:10,560 scale, was carried out by R.C. Tiddeman and published as part
Hughes, R.A.
core  

Shear behavior of bolt–grout interfaces under constant normal stiffness: Influence of grout strength and thickness

Deep Underground Science and Engineering, EarlyView.
The effects of grout strength and thickness on the shear behavior of bolt–grout interfaces (BGI) under constant normal stiffness conditions are investigated. Shear strength, failure modes, and acoustic emission characteristics are examined. The findings reveal that grout strength exerts a significantly greater influence on BGI shear strength and ...
Sunhao Zhang, Dongqi Shang, Yujing Jiang, Jinge Zhang, Hongbin Chen, Tianqi Jiang   +5 more
wiley   +1 more source

Provenance Variations of Cretaceous Sandstones from Arkansas and Drainage Reorganization in Southern USA: Evidence from Detrital Zircon Ages

Geosciences
Detrital zircon (DZ) ages of Cretaceous sandstones in the United States contain critical spatial and temporal information on their sedimentary provenance and on the reorganization of drainage patterns.
Haibo Zou, David T. King, Mackenzie Benton, Zain Webb   +3 more
doaj   +1 more source

The albian-cenomanian boudary in the northern part of the Don-Medveditsa dislocations. Paper 1. The history of studying and the section descriptions [PDF]

Известия Саратовского университета. Новая серия: Серия Науки о Земле
The Albian-Cenomanian rocks compose a single complex of terrigenous deposits over the Volga Region. Delineation of the boundaries of the Cretaceous system units generally tends to cause difficulties, accounted for by rare finds of the fossils.
Pervushov, Evgeniy Mikhaylovich, Baraboshkin, Evgeniy Yurievich, Shelepov, Dmirtiy Aleksandrovich, Biryukov, Aleksei Vladimirovich   +3 more
doaj   +1 more source

Investigating electrical response to water saturation of Agbada sandstone in an x-field Niger delta, Nigeria [PDF]

, 2019
In an attempt to characterize a reservoir in a field, importance is given to living models as it serves critical function in estimating if the reservoir under study is economically viable. Having a good knowledge of electrical response to reservoir rocks
Nwankwo, Cyril N., Omali, Aurelius O., Ugbena, Kelvins Godfrey   +2 more
core   +1 more source

Generalized Matsuoka–Nakai criterion considering hydrostatic pressure dependence in the brittle–ductile region

Deep Underground Science and Engineering, EarlyView.
Three sets of strength data were selected, including hydrostatic pressure independent within the brittle region (HPI‐B), hydrostatic pressure dependent within the brittle region (HPD‐B), and hydrostatic pressure dependent within the brittle–ductile region (HPD‐BD). For HPI type, the failure envelope within the deviatoric plane remains constant.
Jiacun Liu, Junjie Xiao, Dongping Liu, Ying Xu   +3 more
wiley   +1 more source

Formation Evaluation and Reservoir Quality Assessment of the AN-field Offshore Douala/Kribi Campo Basin, Cameroon [PDF]

Journal of Petroleum Science and Technology
The AN field, located offshore in the Douala Sub-Basin within the Douala/Kribi-Campo Basin, is part of the larger Aptian Salt Basin in Equatorial West Africa.
Edwin Ndip, Joseph Valery Ⅱ Batembe, Kawa Maximus Josephine   +2 more
doaj   +1 more source