Výsledky vyhledávání

Akademický článek

The current perspective of the PA 1957 gas well pillar study and its implications for longwall gas well pillars

Autor: Peter Zhang, Daniel Su, Chris Mark

Publikováno v: International Journal of Mining Science and Technology, Vol 31, Iss 1, Pp 117-126 (2021)

Many states rely upon the Pennsylvania 1957 Gas Well Pillar Study to evaluate the coal barrier surrounding gas wells. The study included 77 gas well failure cases that occurred in the Pittsburgh and Freeport coal seams over a 25-year span. At the tim

Externí odkaz: https://doaj.org/article/c88995f7ec33483b931c8708a7afe632

Zobrazit plný text záznamu

Uranium–lead geochronology applied to pyrope garnet with very low concentrations of uranium

Autor: Gary J O’Sullivan, Brendan C Hoare, Chris Mark, Foteini Drakou, Emma L Tomlinson

Publikováno v: Geological Magazine. 160:1010-1019

We present U–Pb dates from peridotitic pyrope-rich garnet from four mantle xenoliths entrained in a kimberlite from Bultfontein, South Africa. Garnet dates magmatic emplacement due to the high mantle residence temperatures of the source material pr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b21e57824093724739ffc704b9b65664
https://doi.org/10.1017/s0016756823000122

Zobrazit plný text záznamu

Akademický článek

Wildfires and Monsoons: Cryptic Drivers for Highly Variable Provenance Signals within a Carboniferous Fluvial System

Autor: Bébhinn Anders, Shane Tyrrell, David Chew, Gary O’Sullivan, Chris Mark, John Graham, Eszter Badenszki, John Murray

Publikováno v: Geosciences, Vol 12, Iss 1, p 20 (2022)

Sediment delivery and supply are explicitly controlled by variations in broad-scale processes such as climate, tectonics and eustasy. These in turn influence fluvial processes and hinterland evolution. A bespoke multi-proxy approach (integrating apat

Externí odkaz: https://doaj.org/article/d8d996e843d742f587c4be4bfe8dd449

Zobrazit plný text záznamu

Late Cenozoic drainage reorganization of the paleo-Yangtze river constrained by multi-proxy provenance analysis of the Paleo-lake Xigeda

Autor: David Chew, Shugen Liu, Nathan Cogné, Jinxi Li, Chris Mark, Bin Deng, Gary O'Sullivan, Zhiwu Li, Lei Jiang

Publikováno v: GSA Bulletin. 133:199-211

The Late Cenozoic evolution of the major river networks draining eastern Tibet has major tectonic implications for the development of the plateau but remains highly contentious. In this study from the southeastern margin of the Tibetan Plateau, we co

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6e454d6615f8081083ef158950e1fe0a
https://doi.org/10.1130/b35579.1

Zobrazit plný text záznamu

Constraining recycled detritus in quartz‐rich sandstones: Insights from a multi‐proxy provenance study of the Mid‐Carboniferous, Clare Basin, western Ireland

Autor: Martin Nauton-Fourteu, Shane Tyrrell, David Chew, Andrew C. Morton, Gary O'Sullivan, Chris Mark

Publikováno v: Basin Research. 33:342-363

[Abstract Quartz‐rich sandstones can be produced through multiple sedimentary processes, potentially acting in combination, such as extensive sedimentary recycling or intense chemical weathering. Determining the provenance of such sedimentary rocks

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a834d6febac3c24b0939b05a77283bc5
https://doi.org/10.1111/bre.12469

Zobrazit plný text záznamu

Detrital garnet Lu-Hf and U-Pb geochronometry coupled with compositional analysis: Possibilities and limitations as a sediment provenance indicator

Autor: Chris Mark, Laura Stutenbecker, Sergio Andò, Marta Barbarano, Gary O'Sullivan, Stijn Glorie, Alexander Simpson, J. Stephen Daly

Detrital geochronology is a powerful tool to interrogate the sedimentary archive of (paleo-)hinterland tectonic, metamorphic, and climatic processes, and can also be applied to modern river sediment as a first-pass tool to establish regional bedrock

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::44d80326fe85c9849c800f6220686f96
https://doi.org/10.5194/egusphere-egu22-6405

Zobrazit plný text záznamu

Tracking ice-sheet dynamics by detrital feldspar Pb-isotope and 87Rb/87Sr dating during the Middle Miocene Climatic Transition, Weddell Sea, Antarctica

Autor: Roland Neofitu, Chris Mark, Suzanne O'Connell, Samuel Kelley, Delia Rösel, Thomas Zack, Michael Flowerdew, J. Stephen Daly

Antarctic ice-sheet instability is recorded by ice-rafted debris (IRD) in mid- to high-latitude marine sediment, especially throughout climate transitions. The middle Miocene climatic transition (MMCT), 14.2 to 13.8 Ma, which marks the end of a signi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e2e33046881b07d58fce90e47170b276
https://doi.org/10.5194/egusphere-egu22-6484

Zobrazit plný text záznamu

Spatial variation in provenance signal: identifying complex sand sourcing within a Carboniferous basin using multiproxy provenance analysis

Autor: B. Anders, Eszter Badenszki, David Chew, John Murray, Chris Mark, John R. Graham, Shane Tyrrell, Gary O'Sullivan

Publikováno v: Journal of the Geological Society. 179

Multiple factors (e.g. source rock composition, climate, nature/scale of sedimentary system) influence the volume and composition of sediment delivered to basins. Fluctuations in these parameters produce cryptic source signals which can vary within t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::641b81e3d5420eccebce97866aff3737
https://doi.org/10.1144/jgs2021-045

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání