. Closing of the Semipalatinsk underground nuclear test site, Kazakhstan: Aug 1991

. only currently declared (1993) Russian test site: NZ

. Paper reviews geologic data on NZ published in various books and Journals over a period of 70 years

. For OSI: presented data usefull for estimating the coupling characteristic of the rock, potential for decoupling , comparisons with the geology of othr nuclear test sites worldwide

. Between 1964 and 1990, 36 underground tests have been conducted at this test site

. The Matochkin Shar test site has not been as active as the test sites in eastern Kazakhstan deactivated 1991

. Underground nuclear testing at the Matochkin Shar site occurs in low-porosity, metasedimentary, fractured and faulted rocks in a permafrost environment

. Conditions under the U.S. has no previous test experience

.Themajority of tests appear to have been conducted in clastic rocks, though some mapped test epicenters are located on stratigraphic units composed mostly of carbonates

. In spite of scaled depths of burial similar to those used at he U.S. test site, a large number (72%) of tests at Matochkin Shar resulted in seepage of radioactive inert gases into the atmosphere, suggesting that the testing media do not provide reliable, complete containment of radioactive explosions products

. Former Soviet Union conducted 132 nuclear test between Sept 21, 55 and Oct 24, 90

. 87 athmosphere (1 surface, 3 water surface, 83 air bursts)

. 3 underwater between 55-62

. 42 underground between 64-90

. The underground nuclear test site, loca´ted along the Matochkin Shar strai is the only former Soviet nuclear test site that is presently declared under the 1963 Threshold Test Ban Treaty (TTBT)

. An underground site on the southern part of the islands was deactivated 1975

. Underground tests average one or two per year between 1964 an 1990

. Matochkin Shar test site: 36 test during 64-90

. Matoshkin Shar site is composed of bedded, fractured and faulted sedimentary rocks which dip to the northwest, but are near vertical in Mt. Lasareff, along the strait, where some testing has occured

. deformation of therocks in the test area is due primarly to thrust faulting, though folding occurs

. The tests have occured in low-porosity rocks of middle Paleozoic age, mostly shale, siltstone, sandstone, quartzite, and conglomeate with lesser amounts of limestone and dolomite

. Descriptions of sericite and chlorite schists and quartzites at Matochkin Shar suggests that the rocks are metamorphosed to he Greenschists fascies.

. The largest granitic intrusion on Novaya Zemlya is located on the northern side of the straits, about 20 km to the westt of the current testing region

. No underground test are known to have occured in the granite

. NZ is located in the zone of continuous permafrost

. Up to 600 m thick in the higher mountains

. Uncertain if the tests have occured within or below the permafrost

. Testzonen:
Sukhoy Nos, nördl Insel
Guba Mityushikha, südl Insel
Guba Chernaya, südl Insel

. Wo sind die relevanten Testzonen (unterirdische)?

. Welches Gestein liegt dort vor?

. Wie sind ihre Porositäten?

. Welche weiter relevanten geophysiklische/geologische Eigenschaften weisen sie auf?

. Wie tief liegen die Grundwasserspiegel?

. In welchen Tiefen fanden die Detonationen statt?

. Wie weit entfernt vom Grundwasserspiegel?