Results 41 to 50 of about 292 (182)

Hydrothermal monazite and xenotime chemistry as genetic discriminators for intrusion-related and orogenic gold deposits: implications for an orogenic origin of the Pogo gold deposit, Alaska

Mineralium Deposita, 2023
AbstractAttempts to geochemically distinguish between metamorphic-hydrothermal systems that form orogenic gold deposits and both reduced and oxidized magmatic-hydrothermal systems using isotopes or metal associations have proven ambiguous, particularly for orogenic gold and reduced intrusion-related gold systems.
Ryan D. Taylor, Garth E. Graham, Heather A. Lowers   +2 more
openaire   +1 more source

Pleistocene and Holocene Mobility of Detrital Platinum in Southern New Zealand: Review and Regional Synthesis

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.
Detrital platinum group minerals (PGM) are rare and distinctive in Pleistocene–Holocene sedimentary systems of the southern South Island, thereby enabling tracking of their long‐distance transport for ∼200 km. The first ∼100 km of transport involved Pleistocene glaciofluvial processes southwards down the Waiau River, where PGM (principally Pt–Fe and Ru–
Dave Craw, Marshall Palmer
wiley   +1 more source

Supplemental Material: A metasedimentary source of gold in Archean orogenic gold deposits

, 2021
Compositions of metasedimentary samples, and Table S2 (geochemical compositions of Pontiac, Porcupine and Cadillac samples collected in this study including sample locations, grid references and metamorphic facies grouping; black shale database including Au, As, and Sb data and sample name; and Mann-Whitney U-test results).<br>
et al., Iain Pitcairn
openaire   +1 more source

Trace element composition of scheelite in orogenic gold deposits [PDF]

Mineralium Deposita, 2019
Scheelite from 25 representative orogenic gold deposits from various geological settings was investigated by EPMA (electron probe micro-analyzer) and LA-ICP-MS (laser ablation-inductively coupled plasma-mass spectrometer) to establish discriminant geochemical features to constrain indicator mineral surveys for gold exploration.
Marjorie Sciuba, Georges Beaudoin, Donald Grzela, Sheida Makvandi   +3 more
openaire   +1 more source

Geology and geochronology of the Tokuzbay gold deposit in the Chinese Altai: A case study of collision-related orogenic gold deposits in Central Asian Orogenic Belt

Ore Geology Reviews, 2021
Abstract Orogenic gold deposits are one of the most important gold deposits in the world. However, it is controversial that orogenic gold deposits are only generated at subduction-accretion or both in collisional setting. The Altai Orogen experienced a complex subduction accretion–collision history, including magmatism and metamorphism, and forming ...
Abulimiti Aibai, XiaoHua Deng, Franco Pirajno, Shen Han, WenXiang Liu, Xun Li, Xi Chen, YanShuang Wu, ZhongLin Bao, YanJing Chen   +9 more
openaire   +1 more source

Mineralogy of Historic Scheelite Mine Tailings at Glenorchy, Otago, New Zealand

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.
Otago Schist orogenic mineral deposits with scheelite and gold in the Glenorchy area are mineralogically and geochemically similar to, but structurally different from, those at the active Macraes gold mine in East Otago. Glenorchy veins were mined for scheelite up to 1970s, and an abandoned processing battery site at Glenorchy is now being managed for ...
Dave Craw, Marshall Palmer, Doug MacKenzie   +2 more
wiley   +1 more source

The United States Magnetotelluric Array and the National Impedance Map

Reviews of Geophysics, Volume 64, Issue 2, June 2026.
Abstract The United States Magnetotelluric Array (USMTArray) data set, collected in the years 2006–2024, consists of more than 1,700 long‐period magnetotelluric stations covering the entirety of the contiguous United States on a quasi‐regular 70 km grid.
Anna Kelbert, Paul A. Bedrosian, Adam Schultz, Gary D. Egbert, Louise Pellerin, Jeffrey J. Love, Andrew Frassetto, Benjamin S. Murphy   +7 more
wiley   +1 more source

Mineralization based on CSAMT data: A case study on the Gaoloushan section of Yangshan gold belt

Engineering Reports
Yangshan gold belt (YSGB) in Gansu Province is a super‐large orogenic gold deposit located in the middle section of the Mianxian‐Lueyang arcuate suture zone (Mian‐Lue suture zone).
Yongling Chen, Hu Yang, Chun Zhan, Wei Zhang, Jia Wang, Dan Xie, Wei Wei, Ciren Lamu   +7 more
doaj   +1 more source

Origin and Characteristics of the Shwetagun Deposit, Modi Taung-Nankwe Gold District and the Kunzeik and Zibyaung Deposits, Kyaikhto Gold District in Mergui Belt, Myanmar: Implications for Fluid Source and Orogenic Gold Mineralization

Frontiers in Earth Science, 2021
The Mergui Belt of Myanmar is endowed with several important orogenic gold deposits, which have economic significance and exploration potential. The present research is focused on two gold districts, Modi Taung-Nankwe and Kyaikhto in the Mergui Belt ...
Myo Kyaw Hlaing, Myo Kyaw Hlaing, Kotaro Yonezu, Khin Zaw, Aung Zaw Myint, May Thwe Aye, Koichiro Watanabe   +6 more
doaj   +1 more source

Geochemical and Isotopic Constraints on Long‐Lived Source Enrichment and Mantle Evolution in Paleoproterozoic Cratonic Lamprophyres

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract The cratonic lithospheric mantle records complex metasomatic processes and is frequently tapped by alkaline magmatism, offering a unique opportunity to trace the progressive evolution of the mantle. In the present contribution, we investigate a newly identified calc‐alkaline lamprophyre field from the Neoarchean Jonnagiri Schist Belt, Eastern ...
Sourav Naskar, Rohit Pandey, Nils Björn Baumann, N. V. Chalapathi Rao, George Mathew, J. Amal Dev, J. K. Tomson   +6 more
wiley   +1 more source