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支家地银矿位于华北地台北部，燕山断块涞源块隆与五台块隆的过渡地带，太白巍山北侧。银矿体受隐爆角砾岩筒内部构造及其边部构造控制，呈脉状斜列产出。区内已查明１０个银矿体，主矿体以盲矿体为主。成矿温度２５０～３５０℃，成矿压力为１８０×１０￣５Ｐａ，盐度为０．９２％，矿化度４２．４ｇ／ｔ，ｐＨ值为７．５７，Ｅｈ值为—０．７７。燕山期石英斑岩是主要矿源岩。隐爆角砾岩筒构造既是导矿构造，又是储矿构造。该矿床属于与次火山岩有关的中低温热液矿床。
Branch home silver is located in the northern part of North China platform, Yanshan fault block Yuandong block and Wutai block the transition zone, northern Taibai Weishan. The silver ore body is controlled by the internal structure of the cryptoexplosive breccia tube and its marginal structure with a pulse oblique output. The area has identified 10 silver ore bodies, the main orebody to blind ore body. The metallogenetic temperature is 250 ~ 350 ℃. The metallogenetic pressure is 180 × 10 ~ 5Pa, salinity is 0.92%, salinity is 42.4g / t, pH value is 7.57 and Eh value is -0.77. Yanshanian quartz porphyry is the main source rock. Cryptoexplosive breccia tube structure is both ore-bearing structure, but also ore-bearing structure. This deposit belongs to the intermediate-low temperature hydrothermal deposit related to subvolcanic rocks.