ORIGINAL ARTICLES 

1

Early Silurian Wuchuan–Sihui–Shaoguan exhalative sedimentary pyrite belt, South China: constraints from zircon dating for K-bentonite of the giant Dajiangping deposit
Yingying Zhang · Taiyi Luo · Tian Gan · Mingzhong Zhou · Xinqiao Han

13

Niobium–tantalum oxide minerals in alluvial placer deposits from the Ngoura area, East-Cameroon
François Ndong Bidzang · Elisé Sababa · Tessontsap Teutsong

25

Development of a 100 MPa water–gas two-phase fluid pressurization device
Shengbin Li · Heping Li · Lin Chen · Hongbin Zhou

32

Helium and argon isotope geochemistry of the Tibetan Qulong porphyry Cu-Mo deposit, China
Keqiang Peng · Liyan Wu · Yong Huang · Ke Jiang

42

Translocation and distribution of mercury in biomasses from subtropical forest ecosystems: evidence from stable mercury isotopes
Yi Liu · Che-Jen Lin · Wei Yuan · Zhiyun Lu · Xinbin Feng

51

Neoproterozoic highly fractionated I-type granitoids of Shillong Plateau, Meghalaya, Northeast India: geochemical constraints on their petrogenesis
Debjani Choudhury · M.Faruque Hussain

67

Coprecipitation of metal ions into calcite: an estimation of partition coefficients based on field investigation
Zhongwei Wang · Jiubin Chen · Hongming Cai · Wei Yuan · Shengliu Yuan

78

The efficiency and accuracy of probability diagram, spatial statistic and fractal methods in the identification of shear zone gold mineralization: a case study of the Saqqez gold ore district, NW Iran
Mirmahdi Seyedrahimi-Niaraq · Amin Hekmatnejad

89

Lithological and Si–O–S isotope geochemistry: constraints on the origin and genetic environment of the selenium (Se)-rich siliceous rocks in Enshi, Hubei Province, China
Caixia Feng · Shen Liu · Ian M. Coulson

106

A geochronological and geochemical study on the granodiorite porphyry and its implication for the mineralization in the Dayaoshan metallogenic belt, Southeastern China
Panfeng Liu · Jiali Zhang · Zhiqiang Wu · Qingwei Zhang · Meilan Wen · Xianrong Luo · Chaojie Zheng · Wenbin Huang