In the.e.ste.n part of the.Aldansky shie.d, on the.te.ritory of v.lcanic and se.ime.tary basins of Prote.ozoic age. many de.osits and ore.occurre.ce. of Au, Ag, Mo, U, v.ni, Co, Ba and Th are.***, ge.che.ical and flu...
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In the.e.ste.n part of the.Aldansky shie.d, on the.te.ritory of v.lcanic and se.ime.tary basins of Prote.ozoic age. many de.osits and ore.occurre.ce. of Au, Ag, Mo, U, v. ni, Co, Ba and Th are.***, ge.che.ical and fluid inclusion study indicate.the.r low te.pe.ature.(e.ithe.mal) *** is suppose. that the.e.ore. we.e.forme. in the.gre.v.lle.me.alloge.ic e.och (Uppe. Prote.ozoic). The.e.ithe.mal ore. in this re.ion are.conne.te. with: (i) e.site.(apatite.albite.me.asomatite.)and (ii) argillice.us-white.mica me.asomatite. (argillisite. and be.e.ite.). Apatite.albite.me.asomatite.are.associate. with rare.e.rth ore.. As a rule. me.asomatite.bodie. are.controlle. by ste.ply-dipping fracture.. Albite. quartz and fine.graine. he.atite.form a typical mine.al assiciation. The.ore.be.ring me.asomatite. we.e.forme. at pH = 4 and T≤300℃. The.be.e.ite.type.argillace.us-white.mica alte.ations are.wide.pre.d in v.lcanic rocks of the.Ulkansky basin and in the.se.ime.tary suite. of the.Uchursky basin. The. are.distinguishe. on all stratigraphicle.0}ls, but e.pe.ially ofte. in a zone.of structural-stratigraphic unconformity (SSU) of AR-PR. Au, Ag,Mo, v.and U de.osits and occurre.ce. are.conne.te. with this type.of alte.ations. The.r structural pos-
GaAs-base. microdisk lase.s with an activ. re.ion re.re.e.ting a de.se.array of indium-rich islands(InGaAs quantum we.l-dots) we.e.studie. using dire.t small-signal modulation. We.de.onstrate.that using de.se.arrays o...
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GaAs-base. microdisk lase.s with an activ. re.ion re.re.e.ting a de.se.array of indium-rich islands(InGaAs quantum we.l-dots) we.e.studie. using dire.t small-signal modulation. We.de.onstrate.that using de.se.arrays of InGaAs quantum we.l-dots e.able. uncoole. high-fre.ue.cy applications with a GHz-range.bandwidth for microdisk lase.s. A maximum 3 dB modulation fre.ue.cy of 5.9 GHz was found in the.microdisk with a radius of 13.5 μm ope.ating without a he.tsink for cooling. A modulation curre.t e.ficie.cy factor of 1.5 GHz∕mA1∕2 was e.timate..
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