Timing and genetic link of porphyry Mo and skarn Pb-Zn mineralization in the Chagele deposit, Western Nyainqentanglha belt, Tibet

Genesis of the Sinongduo Carbonate‐hosted Pb‐Zn‐Ag Deposit in the Central Lhasa Terrane, Tibet

“…These Pb-Zn-Ag deposits formed during 65-55 Ma, most of them being associated with coeval granitic rocks (Zheng et al, 2015). In addition, some skarn Cu (e.g., Zheng W B et al, 2019), porphyry Mo (e.g., Gao et al, 2021) and skarn Fe (Cu) (e.g., Zheng et al, 2015;Wang et al, 2018) deposits are also found in the NGPB.…”

“…1a; NGPB) located in the central Lhasa terrane (Zheng et al, 2015) has attracted considerable attention. This belt is characterized by large Pb-Zn (Ag) deposits, such as the Narusongduo breccias (NRSDB) and skarn (NRSDS) Pb-Zn-Ag deposit (Ji, 2013), the Chagele skarn Pb-Zn deposit (Gao et al, 2021), the Longgen skarn Pb-Zn deposit (Gao et al, 2020), the Longmala and Mengya'a skarn Pb-Zn deposits (Wang et al, 2015) and the Sinongduo epithermal (SNDE) Pb-Zn-Ag deposit (Tang et al, 2016;Li et al, 2019;Yang et al, 2020). These Pb-Zn-Ag deposits formed during 65-55 Ma, most of them being associated with coeval granitic rocks (Zheng et al, 2015).…”

“…These Pb-Zn-Ag deposits formed during 65-55 Ma, most of them being associated with coeval granitic rocks (Zheng et al, 2015). In addition, some skarn Cu (e.g., Zheng W B et al, 2019), porphyry Mo (e.g., Gao et al, 2021) and skarn Fe (Cu) (e.g., Zheng et al, 2015;Wang et al, 2018) deposits are also found in the NGPB.Compared to the GPCB, which has been extremely well studied, information on the characteristics and genesis of the NGPB is scarce. Previous geochronological studies have revealed that the ages of mineralization in the NGPB range from 65…”

Microcontinent subduction and S-type volcanism prior to India–Asia collision

“…The same inference can also be made for the coeval intrusive rocks as they show similar whole-rock geochemistry and Sr-Nd isotope, and zircon Hf isotope compositions with the Cretaceous I-type Gangdese batholith 6,[14][15][16] . Besides, some hypabyssal granitic rocks show increased crustal contribution similar to S-type granite with radiogenic Sr-Nd-Pb and zircon Hf isotope compositions 10,13,17,18 . In general, the geodynamic setting of the Paleocene Dianzhong volcanic and intrusive rocks was either an Andean-type convergent margin formed by the northward subduction of the Neo-Tethys oceanic crust beneath the Lhasa block 19 , or a syn-collision orogen formed during the rollback of the Neo-Tethys slab accompanied by crustal melting induced by asthenospheric upwelling and magma mixing 8,14-17 .…”

“…Data for the Himalayan highly fractionated leucogranite are from Liu et al 28 , and Lin et al 29 . Data for the Xuru Tso granitoids and volcanic rocks are from Lee et al 9 , and Gao et al 10 . Other data for the Sinongduo granitoids and volcanic rocks are from Yang 11 , Zhou et al 12 , and Ding et al 21 .…”