Abstract: Dachang Tin deposit is a super-large-scale nonferrous metal deposit which is characteristic by multi-resources of mineralizing matter, complicated controlling factors of ore forming and various types of ore body. The 100# ore body is hosted in Longtoushan carbonate reef. The distributing characteristic and law of every component during the process of mineralizing, the anomaly extend characteristics of different kinds of trace elements and hydrocarbons, the variety of element ratios, the synthetic anomaly zoning pattern and prospecting indicators that related to the deposit have been summarized in the paper. The varieties of the microelement's and the hydrocarbon's content in different levels of laneway show that the No.100 ore body in this area is continuous，but it was mineralized by multi-period or multi-stage of one period. The multi-mineralizing period or stage and the differences of geochemical quality and behavior of elements result in the difference of their anomaly concentrated place, and form several higher value centers of anomaly.