Results 141 to 150 of about 285 (183)

Chapter 8 Orogenic Gold Deposits of China

2019
Abstract China produces about 450 t Au per year and has government stated in-ground reserves of approximately 12,000 t Au. Orogenic gold, or gold deposits in metamorphic rocks, and associated placer deposits compose about 65 to 75% of this endowment, with lodes existing as structurally hosted vein and/or disseminated orebodies.
Richard Goldfarb, Kunfeng Qiu, Jun Deng, Yanjing Chen, Liqiang Yang   +4 more
openaire   +1 more source

Introduction: Macraes Mine as an Orogenic Gold Deposit

2016
Orogenic gold deposits are typically dominated by quartz veins in faults. Historic mining at Macraes focused on scattered small quartz veins, with only minor Au production. Modern exploration and mining has developed from these small beginnings into a world class mine operation which has produced >4 million ounces of Au from a total resource exceeding ...
Dave Craw, Doug MacKenzie
openaire   +1 more source

Metabasalts as sources of metals in orogenic gold deposits

Mineralium Deposita, 2014
Although metabasaltic rocks have been suggested to be important source rocks for orogenic gold deposits, the mobility of Au and related elements (As, Sb, Se, and Hg) from these rocks during alteration and metamorphism is poorly constrained. We investigate the effects of increasing metamorphic grade on the concentrations of Au and related elements in a ...
Pitcairn, Iain K., Craw, Dave, Teagle, Damon A.H.   +2 more
openaire   +2 more sources

Orogenic Gold Mineralization in the Qolqoleh Deposit, Northwestern Iran

Resource Geology, 2007
AbstractThe Qolqoleh gold deposit is located in the northwestern part of the Sanandai‐Sirjan Zone, northwest of Iran. Gold mineralization in the Qolqoleh deposit is almost entirely confined to a series of steeply dipping ductile–brittle shear zones generated during Late Cretaceous–Tertiary continental collision between the Afro‐Arabian and the Iranian ...
Farhang Aliyari, Ebrahim Rastad, Hou Zengqian   +2 more
openaire   +1 more source

Gold-bearing volcanogenic massive sulfides and orogenic-gold deposits in the Nubian Shield

South African Journal of Geology, 2017
The Nubian Shield is a large region of juvenile Neoproterozoic rocks that, together with its counterpart in the Arabian Shield, is part of a major accretionary orogen. It originated as late Tonian-Cryogenian island arcs on the site of the Mozambique Ocean formed by breakup of Rodinia.
P.R. Johnson, B.A. Zoheir, W. Ghebreab, R.J. Stern, C.T. Barrie, R.D. Hamer   +5 more
openaire   +1 more source

Gold mobility in Archean metasedimentary belts: Implications for orogenic gold deposits

Geology
The southern Superior Province (Canada) comprises large metasedimentary belts, such as the Pontiac and Quetico subprovinces, adjacent to Au-endowed greenstone belts. The Pontiac sedimentary rocks have been proposed as a source of Au for the highly endowed southern Abitibi greenstone belt.
Diogo Ribeiro, Bertrand Rottier, Antoine Godet, Georges Beaudoin, Clifford G.C. Patten, Carl Guilmette, Adrian G. Rehm, Isaac S. Malta, Jochen Kolb, Douglas K. Tinkham, Iain Pitcairn   +10 more
openaire   +1 more source

Structural controls on orogenic gold deposits

Acta Petrologica Sinica, 2023
Lin YANG, QingFei WANG, ShiYu ZHAO, HuaJian LI, HeSen ZHAO, ChaoYi DONG, XueFei LIU, Jun DENG   +7 more
openaire   +1 more source

Experimental Metalloid Mobilisation from a New Zealand Orogenic Gold Deposit

Mine Water and the Environment, 2015
Elevated dissolved antimony (Sb) and arsenic (As) are common environmental issues around orogenic gold mines. The metalloids occur principally in stibnite (Sb2S3) and arsenopyrite (FeAsS), and are typically accompanied by pyrite (FeS2). Samples of arsenopyrite-rich (≈2.5 wt% As) and stibnite-rich (≈10 wt% Sb) ore were collected from the Globe-Progress ...
G. Kerr, J. Pope, D. Trumm, D. Craw
openaire   +1 more source

Orogenic Gold-Ore Deposits of Taimyr–Severnaya Zemlya Province, Russia

Geology of Ore Deposits
The paper presents geological and genetic typification of gold orogenic mineral deposits of Taimyr-Severnaya Zemlya associated with accretionary processes in the Precambrian and collisional ones in the Late Paleozoic. Gold-bearing mineral associations of gold-quartz and gold-sulfide-quartz deposits of accretionary formations of the Precambrian Shrenk ...
V. F. Proskurnin, G. A. Palyanova, A. A. Borovikov, N. S. Bortnikov   +3 more
openaire   +2 more sources

Orogenic Gold Deposits: Mineralization Mechanism and Research Perspectives

Journal of Earth Science, 2023
Shao-Yong Jiang, Ying Ma, De-Liang Liu, Wen-Tian Li   +3 more
openaire   +1 more source