Geochemistry of Au-bearing pyrite from the Sepon Mineral District, Laos DPR, Southeast Asia: Implications for ore genesis

Technological reconstruction of the late prehistoric primary copper production of the Vilabouly Complex (central Laos)

“…The Vilabouly Complex is situated in the Sepon Mineral District (SMD) of gold and copper deposits, under license to Lane Xang Minerals Limited (LXML), along the southern boundary of the NW-trending Truong Son fold belt in Savannakhet Province, south central Laos. The Sepon Basin is a small scale clastic-carbonate sedimentary basin approximately 20-km long by 8-km wide, belonging to a group of Palaeozoic successor basins (Cromie et al 2018). The prospect is located at an altitude of around 300 m above sea level, with the central section of the district located longitude 105.59°E and latitude 16.58°N (Cromie 2010).…”

“…The main host rocks containing copper minerals are identified as skarn and limestones, as well as porphyries and black carbonaceous shale. Fairly high levels of secondary groundwaterremobilized barite (BaSO4) are identified in the SMD, often associated with malachite (Cromie 2010;Cromie et al 2018).…”

Major and Trace Element Geochemistry of Pyrite and Pyrrhotite from Stratiform and Lamellar Orebodies: Implications for the Ore Genesis of the Dongguashan Copper (Gold) Deposit, Eastern China

“…Py I and Py II are depleted in Ni, As, Pb, Te and Sb, which are different from those of synsedimentary pyrite [56], according to the geochemical characteristics of the high temperature hydrothermal pyrite [2]. The higher contents of Mn, Cu, Se and Zn show some similarity with the skarn deposit [57].…”

A new orogenic gold belt in Southeast Asia: Geology, mineralogy and genesis of the Vangtat gold deposit, Southeastern Laos

“…Precious‐ and base‐metal deposits in Southeast Asia are mainly found along the boundaries of the different terranes and internal domains, such as the Truong Son and Loei fold belts (Figure 1). Within the northern and eastern regions of the Indochina Terrane several gold deposits have been discovered and developed: the Song Hien sediment‐hosted gold deposits in NE Vietnam, located in the western part of the South China Terrane close to the northeastern margin on the Indochina Terrane (Tran et al ., 2016; Nevolko et al ., 2017); distal disseminated, sediment‐hosted gold deposits associated with skarn (and porphyry) mineralization in the Sepon Cu‐Au‐Mo district (Smith et al ., 2005; Cannell and Smith, 2008; Cromie et al ., 2018); and the Phuoc Son and Bong Mieu orogenic gold deposits in central Vietnam (Manaka, 2014, unpublished data; Tran et al ., 2014). This paper presents a study of a new gold belt that has been discovered recently in the Vangtat region of southeastern Laos (Figures 1, 2).…”