地质论评
地質論評
지질론평
GEOLOGICAL REVIEW
2015年
1期
109-120
,共12页
冯云磊%袁万明%郝娜娜%段宏伟%陈小宁%曹建辉
馮雲磊%袁萬明%郝娜娜%段宏偉%陳小寧%曹建輝
풍운뢰%원만명%학나나%단굉위%진소저%조건휘
裂变径迹热年代学%剥蚀厚度%地质热历史%矿体保存
裂變徑跡熱年代學%剝蝕厚度%地質熱歷史%礦體保存
렬변경적열년대학%박식후도%지질열역사%광체보존
fission track thermochronology%thickness of denudation%thermal history%conservation of deposit
有关吉林省桦甸市夹皮沟金矿区剥露历史的研究,至今尚不多见,然而成矿后的变化与保存是矿床学研究的一个重要领域,并且矿区剥露历史对于区内矿体保存状况具有重要的指示意义。裂变径迹是研究区域隆升剥露的一种有效手段,能提供剥蚀速率和剥蚀量的定量数据,本文应用裂变径迹技术研究夹皮沟金矿区中生代成矿以来的剥露历史。使用磷灰石裂变径迹年龄数据进行热历史模拟,揭示其演变机理。实验中获得8个了磷灰石裂变径迹测试结果,裂变径迹年龄可分为3组:(128~111Ma、86~64Ma和48~29Ma)。夹皮沟金矿区的热演化历史可分为了3个阶段,分别为:第1阶段160Ma到85±10 Ma;第2阶段85±10 Ma到28±2 Ma;第3阶段28±2 Ma至今,相应的剥露深度为2.90km、0km和1.17km。根据剥露厚度及成矿深度推测,夹皮沟本区中下戏台、立山两矿区金矿床保存状况良好,下部仍有较大探矿潜力。
有關吉林省樺甸市夾皮溝金礦區剝露歷史的研究,至今尚不多見,然而成礦後的變化與保存是礦床學研究的一箇重要領域,併且礦區剝露歷史對于區內礦體保存狀況具有重要的指示意義。裂變徑跡是研究區域隆升剝露的一種有效手段,能提供剝蝕速率和剝蝕量的定量數據,本文應用裂變徑跡技術研究夾皮溝金礦區中生代成礦以來的剝露歷史。使用燐灰石裂變徑跡年齡數據進行熱歷史模擬,揭示其縯變機理。實驗中穫得8箇瞭燐灰石裂變徑跡測試結果,裂變徑跡年齡可分為3組:(128~111Ma、86~64Ma和48~29Ma)。夾皮溝金礦區的熱縯化歷史可分為瞭3箇階段,分彆為:第1階段160Ma到85±10 Ma;第2階段85±10 Ma到28±2 Ma;第3階段28±2 Ma至今,相應的剝露深度為2.90km、0km和1.17km。根據剝露厚度及成礦深度推測,夾皮溝本區中下戲檯、立山兩礦區金礦床保存狀況良好,下部仍有較大探礦潛力。
유관길림성화전시협피구금광구박로역사적연구,지금상불다견,연이성광후적변화여보존시광상학연구적일개중요영역,병차광구박로역사대우구내광체보존상황구유중요적지시의의。렬변경적시연구구역륭승박로적일충유효수단,능제공박식속솔화박식량적정량수거,본문응용렬변경적기술연구협피구금광구중생대성광이래적박로역사。사용린회석렬변경적년령수거진행열역사모의,게시기연변궤리。실험중획득8개료린회석렬변경적측시결과,렬변경적년령가분위3조:(128~111Ma、86~64Ma화48~29Ma)。협피구금광구적열연화역사가분위료3개계단,분별위:제1계단160Ma도85±10 Ma;제2계단85±10 Ma도28±2 Ma;제3계단28±2 Ma지금,상응적박로심도위2.90km、0km화1.17km。근거박로후도급성광심도추측,협피구본구중하희태、립산량광구금광상보존상황량호,하부잉유교대탐광잠력。
The denudation history of the Jiapigou gold deposit is still unknown nowadays.Even though a large number of researches have been done in Jiapigou,the calculation of denudation in this area is relatively virgin territory.However,it is denudation that is able to significantly unveil the preservation of deposit.Fission track is able to provide the accurate thickness of denudation and uplift efficiently.This article discusses the denudation history of local district in the Jiapigou gold deposit by means of apitite fission track (AFT)technique.The thermal history has been derived from the data of AFT.8 AFT ages have been obtained,and are divided into 3 groups of 128~111Ma and 86~64Ma,as well as 48~29Ma.Meanwhile,three phases,such as 160~(85 ±10)Ma,(85 ±10)~(28 ±2)Ma and (28 ±2)~0Ma,can be received by analyzing thermal history of 6 samples.The main thickness of the section removed by denudation of each phase are 2.90km,0,and 1.17km respectively,which predict that the gold deposit is still lying under earth's surface by comparing with the depth of mineralization.