Spatiotemporal reconstruction of Late Mesozoic silicic large igneous province and related epithermal mineralization in South China: Insights from the Zhilingtou volcanic‐intrusive complex

2016 ◽  
Vol 121 (11) ◽  
pp. 7903-7928 ◽  
Author(s):  
Guo‐Guang Wang ◽  
Pei Ni ◽  
Chao Zhao ◽  
Xiao‐Lei Wang ◽  
Pengfei Li ◽  
...  
Keyword(s):  
South China ◽  
Large Igneous Province ◽  
Intrusive Complex ◽  
Late Mesozoic ◽  
Epithermal Mineralization ◽  
Igneous Province

Ultramafic-alkaline-carbonatite complexes as a result of two-stage melting of mantle plume: evidence from the mid-paleoproterozoic Tiksheozero intrusion, Northern Karelia, Russia

2019 ◽  
Vol 486 (4) ◽  
pp. 460-465
Author(s):  
E. V. Sharkov ◽  
A. V. Chistyakov ◽  
M. M. Bogina ◽  
O. A. Bogatikov ◽  
V. V. Shchiptsov ◽  
...  
Keyword(s):  
Fractional Crystallization ◽  
Mantle Plume ◽  
Large Igneous Province ◽  
Intrusive Complex ◽  
Incongruent Melting ◽  
Isotopic Data ◽  
Two Stage ◽  
Similar Composition ◽  
Igneous Province ◽  
Alkaline Magmas

Tiksheozero ultramafic-alkaline-carbonatite intrusive complex, like numerous carbonatite-bearing complexes of similar composition, is a part of large igneous province, related to the ascent of thermochemical mantle plume. Our geochemical and isotopic data evidence that ultramafites and alkaline rocks are joined by fractional crystallization, whereas carbonatitic magmas has independent origin. We suggest that origin of parental magmas of the Tiksheozero complex, as well as other ultramafic-alkaline-carbonatite complexes, was provided by two-stage melting of the mantle-plume head: 1) adiabatic melting of its inner part, which produced moderately-alkaline picrites, which fractional crystallization led to appearance of alkaline magmas, and 2) incongruent melting of the upper cooled margin of the plume head under the influence of CO2-rich fluids  that arrived from underlying zone of adiabatic melting gave rise to carbonatite magmas.

scholarly journals The Willouran basic province of South Australia: Its relation to the Guibei large igneous province in South China and the breakup of Rodinia

Lithos ◽  
2010 ◽  
Vol 119 (3-4) ◽  
pp. 569-584 ◽  
Author(s):  
Xuan-Ce Wang ◽  
Xian-Hua Li ◽  
Zheng-Xiang Li ◽  
Ying Liu ◽  
Yue-Heng Yang
Keyword(s):  
South China ◽  
South Australia ◽  
Large Igneous Province ◽  
Igneous Province

scholarly journals Mercury Anomalies Link to Extensive Volcanism Across the Late Devonian Frasnian–Famennian Boundary in South China

2021 ◽  
Vol 9 ◽  
Author(s):  
Jiawei Zhang ◽  
Changzhou Deng ◽  
Weipeng Liu ◽  
Zuoqi Tang ◽  
Yue Wang ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
South China ◽  
Mass Extinction ◽  
Causal Link ◽  
Large Igneous Province ◽  
Late Devonian ◽  
Igneous Province ◽  
Ultimate Cause ◽  
Long Time

The Late Devonian Frasnian–Famennian (F–F) mass extinction has been long-time debated by non-volcanic causes, extra-terrestrial impacts, and large igneous province (LIP) eruptions. To better understand the ultimate cause of the F–F mass extinction, here we investigate the chemostratigraphy of mercury (Hg) and total organic carbon (TOC) on two marine F–F strata in the Dushan area, South China. In both sections, high Hg and Hg/TOC anomalies were observed near the F–F boundary. These anomalies are in line with those recently observed in Morocco, Germany, Poland, and north Russia, suggesting a global Hg flux. The Late Devonian LIP eruptions, which are believed to have emitted massive amounts of Hg, could be responsible for the global Hg and Hg/TOC anomalies around the F–F boundary. The observed Hg and Hg/TOC anomalies coincide with the extinction of Frasnian fauna in the Dushan area, implying a causal link between the Viluy, Kola, and Pripyat-Dnieper-Donets LIP eruptions and the F–F mass extinction.

Magmatic underplating beneath the Emeishan large igneous province (South China) revealed by the COMGRA-ELIP experiment

2016 ◽  
Vol 672-673 ◽  
pp. 16-23 ◽  
Author(s):  
Yangfan Deng ◽  
Yun Chen ◽  
Peng Wang ◽  
Khalid S. Essa ◽  
Tao Xu ◽  
...  
Keyword(s):  
South China ◽  
Large Igneous Province ◽  
Emeishan Large Igneous Province ◽  
Magmatic Underplating ◽  
Igneous Province

Architecture of the Canadian portion of the High Arctic Large Igneous Province and implications for magmatic Ni–Cu potential

2016 ◽  
Vol 53 (5) ◽  
pp. 528-542 ◽  
Author(s):  
B.M. Saumur ◽  
K. Dewing ◽  
M.-C. Williamson
Keyword(s):  
Structural Characteristics ◽  
Critical Role ◽  
Regional Scale ◽  
High Arctic ◽  
Large Igneous Province ◽  
Intrusive Complex ◽  
Local Evidence ◽  
Igneous Province ◽  
Plumbing Systems ◽  
Sverdrup Basin

The Cretaceous to Paleogene High Arctic Large Igneous Province (HALIP) occurs in circum-Arctic regions, and the largest portion of the province occurs in Canada’s Arctic Archipelago. This paper reviews and documents the geometry and distribution of the Canadian portion of the HALIP, focussing most notably on the architecture of its intrusive component. The extent of dyke swarms and sills of the Canadian HALIP is updated and is shown to be greater than previously acknowledged. Sills, in particular, occur throughout the Sverdrup Basin and crop out extensively on Axel Heiberg Island within Triassic to Cretaceous strata. The HALIP event is dominantly intrusive, with 3–5 times more intrusive rocks than extrusive rocks, by volume. There is local evidence of syn-emplacement fault activity, possibly involving the reactivation of older faults, controlling the emplacement of dykes. In the eastern Sverdrup Basin, exposures of components of the HALIP are controlled by tectonic elements of the Eocene Eurekan Orogeny, with plumbing systems (dykes, sills) exposed along regional-scale anticlines or the hanging walls of thrusts. Portions of the HALIP have been shown to be prospective for magmatic Ni – Cu – platinum group elements (PGEs) based on geochemistry, and although geochemical controls play a critical role in the genesis of such deposits, structural and magma dynamic controls are also important to consider at the scale of 1–10 km magmatic complexes. Underpinned by the architecture of the Canadian HALIP, we document the structural characteristics of three 1–10 km-scale volcanic–intrusive complexes of the province that show Ni–Cu–PGE prospectivity: the volcanic–intrusive complex of the Strand Fiord – Expedition Fiord area, the Surprise Fiord dykes, and the Wootton Intrusive Complex. All three represent physico-structural environments that would likely promote high magma flowthrough and sulphide transport, and could be targeted for Ni–Cu–PGE magmatic sulphide mineralization.

Mercury fluxes record regional volcanism in the South China craton prior to the end-Permian mass extinction

Geology ◽  
2020 ◽  
Author(s):  
Jun Shen ◽  
Jiubin Chen ◽  
Thomas J. Algeo ◽  
Qinglai Feng ◽  
Jianxin Yu ◽  
...  
Keyword(s):  
South China ◽  
Mass Extinction ◽  
Large Igneous Province ◽  
Upper Permian ◽  
The South ◽  
Triassic Boundary ◽  
Siberian Traps ◽  
Igneous Province ◽  
South China Craton ◽  
Permian Mass Extinction

Enhanced regional subduction-related volcanism in the South China craton concurrent with Siberian Traps large igneous province magmatism was a likely contributor to major biotic and environmental stresses associated with the Permian-Triassic boundary (ca. 252 Ma) mass extinction. However, the timing, intensity, and duration of this regional volcanic activity remain uncertain. We analyzed mercury (Hg) concentrations in three widely separated marine sections in the South China craton (Shangsi, Ganxi, and Chaohu) as well as Hg isotopic compositions in one section (Shangsi) from the Upper Permian (Changhsingian) through the lowermost Triassic (Induan) in order to track volcanic inputs. Four mercury enrichment (ME) intervals, dating to the lowermost Changhsingian (ME1), mid–Clarkina changxingensis zone (ME2), upper C. changxingensis to lower C. yini zones (ME3), and latest Permian mass extinction (LPME) interval (ME4), were recognized on the basis of elevated Hg/total organic carbon ratios. These records provide evidence of strong volcanism in the Tethyan region starting ~2 m.y. before the LPME, whereas only the ME4 event is recorded in extra-Tethyan sections. Mercury isotopes support the inference that pre-LPME Hg peaks were related to regional subduction-related volcanism, and that Hg emissions at the LPME were the result of Siberian Traps large igneous province intrusions into organic-rich sediments. This study demonstrates the feasibility of distinguishing flood-basalt from subduction-related volcanic inputs on the basis of marine sedimentary Hg records.

Emplacement of magma at shallow depth: insights from field relationships at Allan Hills, south Victoria Land, East Antarctica

2011 ◽  
Vol 23 (3) ◽  
pp. 281-296 ◽  
Author(s):  
Giulia Airoldi ◽  
James D. Muirhead ◽  
James D.L. White ◽  
Julie Rowland
Keyword(s):  
Country Rock ◽  
Shallow Depth ◽  
Large Igneous Province ◽  
Intrusive Complex ◽  
Plumbing System ◽  
Victoria Land ◽  
Local Stresses ◽  
Igneous Province ◽  
Vertical Variations ◽  
Rock Mechanical Properties

AbstractAllan Hills nunatak, south Victoria Land, Antarctica, exposes an exceptional example of a shallow depth (< 500 m) intrusive complex formed during the evolution of the Ferrar large igneous province (LIP). Dyke distribution, geometries and relationships allow reconstruction of its history and mechanics of intrusion. Sills interconnect across host sedimentary layers, and a swarm of parallel inclined dolerite sheets is intersected by a radiating dyke-array associated with remnants of a phreatomagmatic vent, where the dolerite is locally quenched and mixed to form peperite. Intrusion geometries, and lack of dominant rift-related structures in the country rock indicate that magma overpressure, local stresses between mutually interacting dykes and vertical variations of host rock mechanical properties controlled the intrusive process throughout the thick and otherwise undeformed pile of sedimentary rocks (Victoria Group). Dolerite sills connected to one another by inclined sheets are inferred to record the preferred mode of propagation for magma-carrying cracks that represent the shallow portions of the Ferrar LIP plumbing system.

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