inclusions studies，intending to determine the source of the fluid responsible for ore-formation，hence exploring its metallogenesis． The aqueous biphase inclusions are identified in the stibnite-bearing quartz veins of the deposit．Moreover，aqueous biphase inclusions are further classified into ① biphase liquid-rich inclusions ( 1a)

and ② biphase gas-rich inclusions ( 1b) depending upon liquid to gas ratio trapped within the fluid inclusions． Homogenization temperatures for ( 1a) and ( 1b) range between 114． 8℃ to 422℃ and 128． 3℃ to 267． 5℃，

respectively． 1a and 1b have salinities of 0． 18% to 16． 14% NaCleqv and 1． 22% to 12． 88% NaCleqv ，and density range from 0． 43 to 1． 02 g /cm3 and 0． 81 to 0． 98 g /cm3，respectively． Sulfur isotopic analysis indicates

δ34SV-CDT from 4． 4 × 10 － 3 to 6． 5 × 10 － 3，with an average of 5． 2 × 10 － 3，whereas H isotopes values on δDV-SMOW standard are － 100． 8 × 10 － 3 and － 107． 5 × 10 － 3，while O isotopes data on δ18OV-SMOW standard range between 20． 1 × 10 － 3 and 20． 4 × 10 － 3 ． Fluid inclusions study，combining with sulfur and H-O isotopic data reveal that the ore-forming fluids originated from deep source and were subsequently contaminated by meteoric water． Hydrostatic pressure calculation shows that the minimum and maximum pressures are 11． 65 and 42． 33 MPa，and relevant depths of deposit are estimated to be 1． 16 and 4． 23 km． Finally，we inferred that Qinggouzi stibnite deposit is a medium-low temperature，low salinity hydrothermal deposit，which is formed by deep source and later contaminated by meteoric water，and is classified as epizonal deposit in terms of orogenic series．

diagenesis; the Sr /Ba values range from 1． 26 to 2． 51，with an average of 1． 93，indicating marine environment; the ratio of Mg /Al ranges from 35． 33 to 86． 34，with an average of 62． 95，indicating the seawater environment，

which is consistent with the result from Sr /Ba; the MgO/CaO values range from 0． 01 to 0． 04，with an average of 0． 02，indicating humid environment; the values of V/( V + Ni) range from 0． 63 to 0． 73，with an average of 0． 70，indicating anoxic environment． In summary，geochemical analyses show that the Nanfen

Formation carbonate rocks are marine deposits，in a warm，humid，anoxic environment with poor flow of seawater， and subsequently underwent weak diagenetic alteration．

since 1950s． Combined with the availability of wetland habitat and the spreading capacity of aquatic birds， hydrological connectivity indices of marsh wetlands were calculated in the studied area，and the temporal and spatial changes were analyzed from 1950s to 2015． The results indicate that: ( 1) the hydrological connectivity

index of the marsh wetlands shows a growth trend with increasing distance threshold． All patches of marsh wetlands linked together when the distance threshold reached 35--40 km; ( 2) the optimal distance of hydrological connectivity is about 10 km for marsh wetlands of whole Naoli Ｒiver Basin; ( 3) the total hydrological connectivity of marsh wetlands decreased in the Naoli Ｒiver Basin from 1950s to 2015． Although the hydrological connectivity index increased after 2005，the fragmentation of the landscape has not been improved． The analysis of the wetland hydrological connectivity can provide a scientific basis for the ecological restoration and protection of the wetland in the Naoli Ｒiver Basin．

by ＲMS height and CL ( correlation length) ，influences the inversion results． Finally，a more complex geological model--pinch-out model was established． In the pinch-out model，the pinch-out interface can be clearly identified，though there is a false anomaly，which will not significantly affect the identification of the underground medium structure．

analysis and numerical simulation to study the variation law of the characteristics of the received borehole radar signal with the variation of fracture width． The Ｒicker wavelet is used as the pulse signal of the borehole radar．The results show that the amplitude of the signal received by the borehole radar first increases，then decreases，

and finally tends to be a stable value with the increase of fracture width． The results have guiding significance for the detection of underground fractures and the estimation of fracture width by borehole radar．